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- /* SPU specific support for 32-bit ELF
- Copyright (C) 2006-2022 Free Software Foundation, Inc.
- This file is part of BFD, the Binary File Descriptor library.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
- #include "sysdep.h"
- #include "libiberty.h"
- #include "bfd.h"
- #include "bfdlink.h"
- #include "libbfd.h"
- #include "elf-bfd.h"
- #include "elf/spu.h"
- #include "elf32-spu.h"
- /* All users of this file have bfd_octets_per_byte (abfd, sec) == 1. */
- #define OCTETS_PER_BYTE(ABFD, SEC) 1
- /* We use RELA style relocs. Don't define USE_REL. */
- static bfd_reloc_status_type spu_elf_rel9 (bfd *, arelent *, asymbol *,
- void *, asection *,
- bfd *, char **);
- /* Values of type 'enum elf_spu_reloc_type' are used to index this
- array, so it must be declared in the order of that type. */
- static reloc_howto_type elf_howto_table[] = {
- HOWTO (R_SPU_NONE, 0, 3, 0, false, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_NONE",
- false, 0, 0x00000000, false),
- HOWTO (R_SPU_ADDR10, 4, 2, 10, false, 14, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_ADDR10",
- false, 0, 0x00ffc000, false),
- HOWTO (R_SPU_ADDR16, 2, 2, 16, false, 7, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_ADDR16",
- false, 0, 0x007fff80, false),
- HOWTO (R_SPU_ADDR16_HI, 16, 2, 16, false, 7, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_ADDR16_HI",
- false, 0, 0x007fff80, false),
- HOWTO (R_SPU_ADDR16_LO, 0, 2, 16, false, 7, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_ADDR16_LO",
- false, 0, 0x007fff80, false),
- HOWTO (R_SPU_ADDR18, 0, 2, 18, false, 7, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_ADDR18",
- false, 0, 0x01ffff80, false),
- HOWTO (R_SPU_ADDR32, 0, 2, 32, false, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_ADDR32",
- false, 0, 0xffffffff, false),
- HOWTO (R_SPU_REL16, 2, 2, 16, true, 7, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_REL16",
- false, 0, 0x007fff80, true),
- HOWTO (R_SPU_ADDR7, 0, 2, 7, false, 14, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_ADDR7",
- false, 0, 0x001fc000, false),
- HOWTO (R_SPU_REL9, 2, 2, 9, true, 0, complain_overflow_signed,
- spu_elf_rel9, "SPU_REL9",
- false, 0, 0x0180007f, true),
- HOWTO (R_SPU_REL9I, 2, 2, 9, true, 0, complain_overflow_signed,
- spu_elf_rel9, "SPU_REL9I",
- false, 0, 0x0000c07f, true),
- HOWTO (R_SPU_ADDR10I, 0, 2, 10, false, 14, complain_overflow_signed,
- bfd_elf_generic_reloc, "SPU_ADDR10I",
- false, 0, 0x00ffc000, false),
- HOWTO (R_SPU_ADDR16I, 0, 2, 16, false, 7, complain_overflow_signed,
- bfd_elf_generic_reloc, "SPU_ADDR16I",
- false, 0, 0x007fff80, false),
- HOWTO (R_SPU_REL32, 0, 2, 32, true, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_REL32",
- false, 0, 0xffffffff, true),
- HOWTO (R_SPU_ADDR16X, 0, 2, 16, false, 7, complain_overflow_bitfield,
- bfd_elf_generic_reloc, "SPU_ADDR16X",
- false, 0, 0x007fff80, false),
- HOWTO (R_SPU_PPU32, 0, 2, 32, false, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_PPU32",
- false, 0, 0xffffffff, false),
- HOWTO (R_SPU_PPU64, 0, 4, 64, false, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_PPU64",
- false, 0, -1, false),
- HOWTO (R_SPU_ADD_PIC, 0, 0, 0, false, 0, complain_overflow_dont,
- bfd_elf_generic_reloc, "SPU_ADD_PIC",
- false, 0, 0x00000000, false),
- };
- static struct bfd_elf_special_section const spu_elf_special_sections[] = {
- { "._ea", 4, 0, SHT_PROGBITS, SHF_WRITE },
- { ".toe", 4, 0, SHT_NOBITS, SHF_ALLOC },
- { NULL, 0, 0, 0, 0 }
- };
- static enum elf_spu_reloc_type
- spu_elf_bfd_to_reloc_type (bfd_reloc_code_real_type code)
- {
- switch (code)
- {
- default:
- return (enum elf_spu_reloc_type) -1;
- case BFD_RELOC_NONE:
- return R_SPU_NONE;
- case BFD_RELOC_SPU_IMM10W:
- return R_SPU_ADDR10;
- case BFD_RELOC_SPU_IMM16W:
- return R_SPU_ADDR16;
- case BFD_RELOC_SPU_LO16:
- return R_SPU_ADDR16_LO;
- case BFD_RELOC_SPU_HI16:
- return R_SPU_ADDR16_HI;
- case BFD_RELOC_SPU_IMM18:
- return R_SPU_ADDR18;
- case BFD_RELOC_SPU_PCREL16:
- return R_SPU_REL16;
- case BFD_RELOC_SPU_IMM7:
- return R_SPU_ADDR7;
- case BFD_RELOC_SPU_IMM8:
- return R_SPU_NONE;
- case BFD_RELOC_SPU_PCREL9a:
- return R_SPU_REL9;
- case BFD_RELOC_SPU_PCREL9b:
- return R_SPU_REL9I;
- case BFD_RELOC_SPU_IMM10:
- return R_SPU_ADDR10I;
- case BFD_RELOC_SPU_IMM16:
- return R_SPU_ADDR16I;
- case BFD_RELOC_32:
- return R_SPU_ADDR32;
- case BFD_RELOC_32_PCREL:
- return R_SPU_REL32;
- case BFD_RELOC_SPU_PPU32:
- return R_SPU_PPU32;
- case BFD_RELOC_SPU_PPU64:
- return R_SPU_PPU64;
- case BFD_RELOC_SPU_ADD_PIC:
- return R_SPU_ADD_PIC;
- }
- }
- static bool
- spu_elf_info_to_howto (bfd *abfd,
- arelent *cache_ptr,
- Elf_Internal_Rela *dst)
- {
- enum elf_spu_reloc_type r_type;
- r_type = (enum elf_spu_reloc_type) ELF32_R_TYPE (dst->r_info);
- /* PR 17512: file: 90c2a92e. */
- if (r_type >= R_SPU_max)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
- abfd, r_type);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- cache_ptr->howto = &elf_howto_table[(int) r_type];
- return true;
- }
- static reloc_howto_type *
- spu_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
- {
- enum elf_spu_reloc_type r_type = spu_elf_bfd_to_reloc_type (code);
- if (r_type == (enum elf_spu_reloc_type) -1)
- return NULL;
- return elf_howto_table + r_type;
- }
- static reloc_howto_type *
- spu_elf_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- const char *r_name)
- {
- unsigned int i;
- for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
- if (elf_howto_table[i].name != NULL
- && strcasecmp (elf_howto_table[i].name, r_name) == 0)
- return &elf_howto_table[i];
- return NULL;
- }
- /* Apply R_SPU_REL9 and R_SPU_REL9I relocs. */
- static bfd_reloc_status_type
- spu_elf_rel9 (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
- void *data, asection *input_section,
- bfd *output_bfd, char **error_message)
- {
- bfd_size_type octets;
- bfd_vma val;
- long insn;
- /* If this is a relocatable link (output_bfd test tells us), just
- call the generic function. Any adjustment will be done at final
- link time. */
- if (output_bfd != NULL)
- return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message);
- if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
- return bfd_reloc_outofrange;
- octets = reloc_entry->address * OCTETS_PER_BYTE (abfd, input_section);
- /* Get symbol value. */
- val = 0;
- if (!bfd_is_com_section (symbol->section))
- val = symbol->value;
- if (symbol->section->output_section)
- val += symbol->section->output_section->vma;
- val += reloc_entry->addend;
- /* Make it pc-relative. */
- val -= input_section->output_section->vma + input_section->output_offset;
- val >>= 2;
- if (val + 256 >= 512)
- return bfd_reloc_overflow;
- insn = bfd_get_32 (abfd, (bfd_byte *) data + octets);
- /* Move two high bits of value to REL9I and REL9 position.
- The mask will take care of selecting the right field. */
- val = (val & 0x7f) | ((val & 0x180) << 7) | ((val & 0x180) << 16);
- insn &= ~reloc_entry->howto->dst_mask;
- insn |= val & reloc_entry->howto->dst_mask;
- bfd_put_32 (abfd, insn, (bfd_byte *) data + octets);
- return bfd_reloc_ok;
- }
- static bool
- spu_elf_new_section_hook (bfd *abfd, asection *sec)
- {
- if (!sec->used_by_bfd)
- {
- struct _spu_elf_section_data *sdata;
- sdata = bfd_zalloc (abfd, sizeof (*sdata));
- if (sdata == NULL)
- return false;
- sec->used_by_bfd = sdata;
- }
- return _bfd_elf_new_section_hook (abfd, sec);
- }
- /* Set up overlay info for executables. */
- static bool
- spu_elf_object_p (bfd *abfd)
- {
- if ((abfd->flags & (EXEC_P | DYNAMIC)) != 0)
- {
- unsigned int i, num_ovl, num_buf;
- Elf_Internal_Phdr *phdr = elf_tdata (abfd)->phdr;
- Elf_Internal_Ehdr *ehdr = elf_elfheader (abfd);
- Elf_Internal_Phdr *last_phdr = NULL;
- for (num_buf = 0, num_ovl = 0, i = 0; i < ehdr->e_phnum; i++, phdr++)
- if (phdr->p_type == PT_LOAD && (phdr->p_flags & PF_OVERLAY) != 0)
- {
- unsigned int j;
- ++num_ovl;
- if (last_phdr == NULL
- || ((last_phdr->p_vaddr ^ phdr->p_vaddr) & 0x3ffff) != 0)
- ++num_buf;
- last_phdr = phdr;
- for (j = 1; j < elf_numsections (abfd); j++)
- {
- Elf_Internal_Shdr *shdr = elf_elfsections (abfd)[j];
- if (ELF_SECTION_SIZE (shdr, phdr) != 0
- && ELF_SECTION_IN_SEGMENT (shdr, phdr))
- {
- asection *sec = shdr->bfd_section;
- spu_elf_section_data (sec)->u.o.ovl_index = num_ovl;
- spu_elf_section_data (sec)->u.o.ovl_buf = num_buf;
- }
- }
- }
- }
- return true;
- }
- /* Specially mark defined symbols named _EAR_* with BSF_KEEP so that
- strip --strip-unneeded will not remove them. */
- static void
- spu_elf_backend_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
- {
- if (sym->name != NULL
- && sym->section != bfd_abs_section_ptr
- && startswith (sym->name, "_EAR_"))
- sym->flags |= BSF_KEEP;
- }
- /* SPU ELF linker hash table. */
- struct spu_link_hash_table
- {
- struct elf_link_hash_table elf;
- struct spu_elf_params *params;
- /* Shortcuts to overlay sections. */
- asection *ovtab;
- asection *init;
- asection *toe;
- asection **ovl_sec;
- /* Count of stubs in each overlay section. */
- unsigned int *stub_count;
- /* The stub section for each overlay section. */
- asection **stub_sec;
- struct elf_link_hash_entry *ovly_entry[2];
- /* Number of overlay buffers. */
- unsigned int num_buf;
- /* Total number of overlays. */
- unsigned int num_overlays;
- /* For soft icache. */
- unsigned int line_size_log2;
- unsigned int num_lines_log2;
- unsigned int fromelem_size_log2;
- /* How much memory we have. */
- unsigned int local_store;
- /* Count of overlay stubs needed in non-overlay area. */
- unsigned int non_ovly_stub;
- /* Pointer to the fixup section */
- asection *sfixup;
- /* Set on error. */
- unsigned int stub_err : 1;
- };
- /* Hijack the generic got fields for overlay stub accounting. */
- struct got_entry
- {
- struct got_entry *next;
- unsigned int ovl;
- union {
- bfd_vma addend;
- bfd_vma br_addr;
- };
- bfd_vma stub_addr;
- };
- #define spu_hash_table(p) \
- ((is_elf_hash_table ((p)->hash) \
- && elf_hash_table_id (elf_hash_table (p)) == SPU_ELF_DATA) \
- ? (struct spu_link_hash_table *) (p)->hash : NULL)
- struct call_info
- {
- struct function_info *fun;
- struct call_info *next;
- unsigned int count;
- unsigned int max_depth;
- unsigned int is_tail : 1;
- unsigned int is_pasted : 1;
- unsigned int broken_cycle : 1;
- unsigned int priority : 13;
- };
- struct function_info
- {
- /* List of functions called. Also branches to hot/cold part of
- function. */
- struct call_info *call_list;
- /* For hot/cold part of function, point to owner. */
- struct function_info *start;
- /* Symbol at start of function. */
- union {
- Elf_Internal_Sym *sym;
- struct elf_link_hash_entry *h;
- } u;
- /* Function section. */
- asection *sec;
- asection *rodata;
- /* Where last called from, and number of sections called from. */
- asection *last_caller;
- unsigned int call_count;
- /* Address range of (this part of) function. */
- bfd_vma lo, hi;
- /* Offset where we found a store of lr, or -1 if none found. */
- bfd_vma lr_store;
- /* Offset where we found the stack adjustment insn. */
- bfd_vma sp_adjust;
- /* Stack usage. */
- int stack;
- /* Distance from root of call tree. Tail and hot/cold branches
- count as one deeper. We aren't counting stack frames here. */
- unsigned int depth;
- /* Set if global symbol. */
- unsigned int global : 1;
- /* Set if known to be start of function (as distinct from a hunk
- in hot/cold section. */
- unsigned int is_func : 1;
- /* Set if not a root node. */
- unsigned int non_root : 1;
- /* Flags used during call tree traversal. It's cheaper to replicate
- the visit flags than have one which needs clearing after a traversal. */
- unsigned int visit1 : 1;
- unsigned int visit2 : 1;
- unsigned int marking : 1;
- unsigned int visit3 : 1;
- unsigned int visit4 : 1;
- unsigned int visit5 : 1;
- unsigned int visit6 : 1;
- unsigned int visit7 : 1;
- };
- struct spu_elf_stack_info
- {
- int num_fun;
- int max_fun;
- /* Variable size array describing functions, one per contiguous
- address range belonging to a function. */
- struct function_info fun[1];
- };
- static struct function_info *find_function (asection *, bfd_vma,
- struct bfd_link_info *);
- /* Create a spu ELF linker hash table. */
- static struct bfd_link_hash_table *
- spu_elf_link_hash_table_create (bfd *abfd)
- {
- struct spu_link_hash_table *htab;
- htab = bfd_zmalloc (sizeof (*htab));
- if (htab == NULL)
- return NULL;
- if (!_bfd_elf_link_hash_table_init (&htab->elf, abfd,
- _bfd_elf_link_hash_newfunc,
- sizeof (struct elf_link_hash_entry),
- SPU_ELF_DATA))
- {
- free (htab);
- return NULL;
- }
- htab->elf.init_got_refcount.refcount = 0;
- htab->elf.init_got_refcount.glist = NULL;
- htab->elf.init_got_offset.offset = 0;
- htab->elf.init_got_offset.glist = NULL;
- return &htab->elf.root;
- }
- void
- spu_elf_setup (struct bfd_link_info *info, struct spu_elf_params *params)
- {
- bfd_vma max_branch_log2;
- struct spu_link_hash_table *htab = spu_hash_table (info);
- htab->params = params;
- htab->line_size_log2 = bfd_log2 (htab->params->line_size);
- htab->num_lines_log2 = bfd_log2 (htab->params->num_lines);
- /* For the software i-cache, we provide a "from" list whose size
- is a power-of-two number of quadwords, big enough to hold one
- byte per outgoing branch. Compute this number here. */
- max_branch_log2 = bfd_log2 (htab->params->max_branch);
- htab->fromelem_size_log2 = max_branch_log2 > 4 ? max_branch_log2 - 4 : 0;
- }
- /* Find the symbol for the given R_SYMNDX in IBFD and set *HP and *SYMP
- to (hash, NULL) for global symbols, and (NULL, sym) for locals. Set
- *SYMSECP to the symbol's section. *LOCSYMSP caches local syms. */
- static bool
- get_sym_h (struct elf_link_hash_entry **hp,
- Elf_Internal_Sym **symp,
- asection **symsecp,
- Elf_Internal_Sym **locsymsp,
- unsigned long r_symndx,
- bfd *ibfd)
- {
- Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- if (r_symndx >= symtab_hdr->sh_info)
- {
- struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (ibfd);
- struct elf_link_hash_entry *h;
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- if (hp != NULL)
- *hp = h;
- if (symp != NULL)
- *symp = NULL;
- if (symsecp != NULL)
- {
- asection *symsec = NULL;
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- symsec = h->root.u.def.section;
- *symsecp = symsec;
- }
- }
- else
- {
- Elf_Internal_Sym *sym;
- Elf_Internal_Sym *locsyms = *locsymsp;
- if (locsyms == NULL)
- {
- locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (locsyms == NULL)
- locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
- symtab_hdr->sh_info,
- 0, NULL, NULL, NULL);
- if (locsyms == NULL)
- return false;
- *locsymsp = locsyms;
- }
- sym = locsyms + r_symndx;
- if (hp != NULL)
- *hp = NULL;
- if (symp != NULL)
- *symp = sym;
- if (symsecp != NULL)
- *symsecp = bfd_section_from_elf_index (ibfd, sym->st_shndx);
- }
- return true;
- }
- /* Create the note section if not already present. This is done early so
- that the linker maps the sections to the right place in the output. */
- bool
- spu_elf_create_sections (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- bfd *ibfd;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- if (bfd_get_section_by_name (ibfd, SPU_PTNOTE_SPUNAME) != NULL)
- break;
- if (ibfd == NULL)
- {
- /* Make SPU_PTNOTE_SPUNAME section. */
- asection *s;
- size_t name_len;
- size_t size;
- bfd_byte *data;
- flagword flags;
- ibfd = info->input_bfds;
- /* This should really be SEC_LINKER_CREATED, but then we'd need
- to write out the section ourselves. */
- flags = SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
- s = bfd_make_section_anyway_with_flags (ibfd, SPU_PTNOTE_SPUNAME, flags);
- if (s == NULL
- || !bfd_set_section_alignment (s, 4))
- return false;
- /* Because we didn't set SEC_LINKER_CREATED we need to set the
- proper section type. */
- elf_section_type (s) = SHT_NOTE;
- name_len = strlen (bfd_get_filename (info->output_bfd)) + 1;
- size = 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4);
- size += (name_len + 3) & -4;
- if (!bfd_set_section_size (s, size))
- return false;
- data = bfd_zalloc (ibfd, size);
- if (data == NULL)
- return false;
- bfd_put_32 (ibfd, sizeof (SPU_PLUGIN_NAME), data + 0);
- bfd_put_32 (ibfd, name_len, data + 4);
- bfd_put_32 (ibfd, 1, data + 8);
- memcpy (data + 12, SPU_PLUGIN_NAME, sizeof (SPU_PLUGIN_NAME));
- memcpy (data + 12 + ((sizeof (SPU_PLUGIN_NAME) + 3) & -4),
- bfd_get_filename (info->output_bfd), name_len);
- s->contents = data;
- }
- if (htab->params->emit_fixups)
- {
- asection *s;
- flagword flags;
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = ibfd;
- ibfd = htab->elf.dynobj;
- flags = (SEC_LOAD | SEC_ALLOC | SEC_READONLY | SEC_HAS_CONTENTS
- | SEC_IN_MEMORY | SEC_LINKER_CREATED);
- s = bfd_make_section_anyway_with_flags (ibfd, ".fixup", flags);
- if (s == NULL || !bfd_set_section_alignment (s, 2))
- return false;
- htab->sfixup = s;
- }
- return true;
- }
- /* qsort predicate to sort sections by vma. */
- static int
- sort_sections (const void *a, const void *b)
- {
- const asection *const *s1 = a;
- const asection *const *s2 = b;
- bfd_signed_vma delta = (*s1)->vma - (*s2)->vma;
- if (delta != 0)
- return delta < 0 ? -1 : 1;
- return (*s1)->index - (*s2)->index;
- }
- /* Identify overlays in the output bfd, and number them.
- Returns 0 on error, 1 if no overlays, 2 if overlays. */
- int
- spu_elf_find_overlays (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- asection **alloc_sec;
- unsigned int i, n, ovl_index, num_buf;
- asection *s;
- bfd_vma ovl_end;
- static const char *const entry_names[2][2] = {
- { "__ovly_load", "__icache_br_handler" },
- { "__ovly_return", "__icache_call_handler" }
- };
- if (info->output_bfd->section_count < 2)
- return 1;
- alloc_sec
- = bfd_malloc (info->output_bfd->section_count * sizeof (*alloc_sec));
- if (alloc_sec == NULL)
- return 0;
- /* Pick out all the alloced sections. */
- for (n = 0, s = info->output_bfd->sections; s != NULL; s = s->next)
- if ((s->flags & SEC_ALLOC) != 0
- && (s->flags & (SEC_LOAD | SEC_THREAD_LOCAL)) != SEC_THREAD_LOCAL
- && s->size != 0)
- alloc_sec[n++] = s;
- if (n == 0)
- {
- free (alloc_sec);
- return 1;
- }
- /* Sort them by vma. */
- qsort (alloc_sec, n, sizeof (*alloc_sec), sort_sections);
- ovl_end = alloc_sec[0]->vma + alloc_sec[0]->size;
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- unsigned int prev_buf = 0, set_id = 0;
- /* Look for an overlapping vma to find the first overlay section. */
- bfd_vma vma_start = 0;
- for (i = 1; i < n; i++)
- {
- s = alloc_sec[i];
- if (s->vma < ovl_end)
- {
- asection *s0 = alloc_sec[i - 1];
- vma_start = s0->vma;
- ovl_end = (s0->vma
- + ((bfd_vma) 1
- << (htab->num_lines_log2 + htab->line_size_log2)));
- --i;
- break;
- }
- else
- ovl_end = s->vma + s->size;
- }
- /* Now find any sections within the cache area. */
- for (ovl_index = 0, num_buf = 0; i < n; i++)
- {
- s = alloc_sec[i];
- if (s->vma >= ovl_end)
- break;
- /* A section in an overlay area called .ovl.init is not
- an overlay, in the sense that it might be loaded in
- by the overlay manager, but rather the initial
- section contents for the overlay buffer. */
- if (!startswith (s->name, ".ovl.init"))
- {
- num_buf = ((s->vma - vma_start) >> htab->line_size_log2) + 1;
- set_id = (num_buf == prev_buf)? set_id + 1 : 0;
- prev_buf = num_buf;
- if ((s->vma - vma_start) & (htab->params->line_size - 1))
- {
- info->callbacks->einfo (_("%X%P: overlay section %pA "
- "does not start on a cache line\n"),
- s);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
- else if (s->size > htab->params->line_size)
- {
- info->callbacks->einfo (_("%X%P: overlay section %pA "
- "is larger than a cache line\n"),
- s);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
- alloc_sec[ovl_index++] = s;
- spu_elf_section_data (s)->u.o.ovl_index
- = (set_id << htab->num_lines_log2) + num_buf;
- spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
- }
- }
- /* Ensure there are no more overlay sections. */
- for ( ; i < n; i++)
- {
- s = alloc_sec[i];
- if (s->vma < ovl_end)
- {
- info->callbacks->einfo (_("%X%P: overlay section %pA "
- "is not in cache area\n"),
- alloc_sec[i-1]);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
- else
- ovl_end = s->vma + s->size;
- }
- }
- else
- {
- /* Look for overlapping vmas. Any with overlap must be overlays.
- Count them. Also count the number of overlay regions. */
- for (ovl_index = 0, num_buf = 0, i = 1; i < n; i++)
- {
- s = alloc_sec[i];
- if (s->vma < ovl_end)
- {
- asection *s0 = alloc_sec[i - 1];
- if (spu_elf_section_data (s0)->u.o.ovl_index == 0)
- {
- ++num_buf;
- if (!startswith (s0->name, ".ovl.init"))
- {
- alloc_sec[ovl_index] = s0;
- spu_elf_section_data (s0)->u.o.ovl_index = ++ovl_index;
- spu_elf_section_data (s0)->u.o.ovl_buf = num_buf;
- }
- else
- ovl_end = s->vma + s->size;
- }
- if (!startswith (s->name, ".ovl.init"))
- {
- alloc_sec[ovl_index] = s;
- spu_elf_section_data (s)->u.o.ovl_index = ++ovl_index;
- spu_elf_section_data (s)->u.o.ovl_buf = num_buf;
- if (s0->vma != s->vma)
- {
- /* xgettext:c-format */
- info->callbacks->einfo (_("%X%P: overlay sections %pA "
- "and %pA do not start at the "
- "same address\n"),
- s0, s);
- bfd_set_error (bfd_error_bad_value);
- return 0;
- }
- if (ovl_end < s->vma + s->size)
- ovl_end = s->vma + s->size;
- }
- }
- else
- ovl_end = s->vma + s->size;
- }
- }
- htab->num_overlays = ovl_index;
- htab->num_buf = num_buf;
- htab->ovl_sec = alloc_sec;
- if (ovl_index == 0)
- return 1;
- for (i = 0; i < 2; i++)
- {
- const char *name;
- struct elf_link_hash_entry *h;
- name = entry_names[i][htab->params->ovly_flavour];
- h = elf_link_hash_lookup (&htab->elf, name, true, false, false);
- if (h == NULL)
- return 0;
- if (h->root.type == bfd_link_hash_new)
- {
- h->root.type = bfd_link_hash_undefined;
- h->ref_regular = 1;
- h->ref_regular_nonweak = 1;
- h->non_elf = 0;
- }
- htab->ovly_entry[i] = h;
- }
- return 2;
- }
- /* Non-zero to use bra in overlay stubs rather than br. */
- #define BRA_STUBS 0
- #define BRA 0x30000000
- #define BRASL 0x31000000
- #define BR 0x32000000
- #define BRSL 0x33000000
- #define NOP 0x40200000
- #define LNOP 0x00200000
- #define ILA 0x42000000
- /* Return true for all relative and absolute branch instructions.
- bra 00110000 0..
- brasl 00110001 0..
- br 00110010 0..
- brsl 00110011 0..
- brz 00100000 0..
- brnz 00100001 0..
- brhz 00100010 0..
- brhnz 00100011 0.. */
- static bool
- is_branch (const unsigned char *insn)
- {
- return (insn[0] & 0xec) == 0x20 && (insn[1] & 0x80) == 0;
- }
- /* Return true for all indirect branch instructions.
- bi 00110101 000
- bisl 00110101 001
- iret 00110101 010
- bisled 00110101 011
- biz 00100101 000
- binz 00100101 001
- bihz 00100101 010
- bihnz 00100101 011 */
- static bool
- is_indirect_branch (const unsigned char *insn)
- {
- return (insn[0] & 0xef) == 0x25 && (insn[1] & 0x80) == 0;
- }
- /* Return true for branch hint instructions.
- hbra 0001000..
- hbrr 0001001.. */
- static bool
- is_hint (const unsigned char *insn)
- {
- return (insn[0] & 0xfc) == 0x10;
- }
- /* True if INPUT_SECTION might need overlay stubs. */
- static bool
- maybe_needs_stubs (asection *input_section)
- {
- /* No stubs for debug sections and suchlike. */
- if ((input_section->flags & SEC_ALLOC) == 0)
- return false;
- /* No stubs for link-once sections that will be discarded. */
- if (input_section->output_section == bfd_abs_section_ptr)
- return false;
- /* Don't create stubs for .eh_frame references. */
- if (strcmp (input_section->name, ".eh_frame") == 0)
- return false;
- return true;
- }
- enum _stub_type
- {
- no_stub,
- call_ovl_stub,
- br000_ovl_stub,
- br001_ovl_stub,
- br010_ovl_stub,
- br011_ovl_stub,
- br100_ovl_stub,
- br101_ovl_stub,
- br110_ovl_stub,
- br111_ovl_stub,
- nonovl_stub,
- stub_error
- };
- /* Return non-zero if this reloc symbol should go via an overlay stub.
- Return 2 if the stub must be in non-overlay area. */
- static enum _stub_type
- needs_ovl_stub (struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym,
- asection *sym_sec,
- asection *input_section,
- Elf_Internal_Rela *irela,
- bfd_byte *contents,
- struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- enum elf_spu_reloc_type r_type;
- unsigned int sym_type;
- bool branch, hint, call;
- enum _stub_type ret = no_stub;
- bfd_byte insn[4];
- if (sym_sec == NULL
- || sym_sec->output_section == bfd_abs_section_ptr
- || spu_elf_section_data (sym_sec->output_section) == NULL)
- return ret;
- if (h != NULL)
- {
- /* Ensure no stubs for user supplied overlay manager syms. */
- if (h == htab->ovly_entry[0] || h == htab->ovly_entry[1])
- return ret;
- /* setjmp always goes via an overlay stub, because then the return
- and hence the longjmp goes via __ovly_return. That magically
- makes setjmp/longjmp between overlays work. */
- if (startswith (h->root.root.string, "setjmp")
- && (h->root.root.string[6] == '\0' || h->root.root.string[6] == '@'))
- ret = call_ovl_stub;
- }
- if (h != NULL)
- sym_type = h->type;
- else
- sym_type = ELF_ST_TYPE (sym->st_info);
- r_type = ELF32_R_TYPE (irela->r_info);
- branch = false;
- hint = false;
- call = false;
- if (r_type == R_SPU_REL16 || r_type == R_SPU_ADDR16)
- {
- if (contents == NULL)
- {
- contents = insn;
- if (!bfd_get_section_contents (input_section->owner,
- input_section,
- contents,
- irela->r_offset, 4))
- return stub_error;
- }
- else
- contents += irela->r_offset;
- branch = is_branch (contents);
- hint = is_hint (contents);
- if (branch || hint)
- {
- call = (contents[0] & 0xfd) == 0x31;
- if (call
- && sym_type != STT_FUNC
- && contents != insn)
- {
- /* It's common for people to write assembly and forget
- to give function symbols the right type. Handle
- calls to such symbols, but warn so that (hopefully)
- people will fix their code. We need the symbol
- type to be correct to distinguish function pointer
- initialisation from other pointer initialisations. */
- const char *sym_name;
- if (h != NULL)
- sym_name = h->root.root.string;
- else
- {
- Elf_Internal_Shdr *symtab_hdr;
- symtab_hdr = &elf_tdata (input_section->owner)->symtab_hdr;
- sym_name = bfd_elf_sym_name (input_section->owner,
- symtab_hdr,
- sym,
- sym_sec);
- }
- _bfd_error_handler
- /* xgettext:c-format */
- (_("warning: call to non-function symbol %s defined in %pB"),
- sym_name, sym_sec->owner);
- }
- }
- }
- if ((!branch && htab->params->ovly_flavour == ovly_soft_icache)
- || (sym_type != STT_FUNC
- && !(branch || hint)
- && (sym_sec->flags & SEC_CODE) == 0))
- return no_stub;
- /* Usually, symbols in non-overlay sections don't need stubs. */
- if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index == 0
- && !htab->params->non_overlay_stubs)
- return ret;
- /* A reference from some other section to a symbol in an overlay
- section needs a stub. */
- if (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index
- != spu_elf_section_data (input_section->output_section)->u.o.ovl_index)
- {
- unsigned int lrlive = 0;
- if (branch)
- lrlive = (contents[1] & 0x70) >> 4;
- if (!lrlive && (call || sym_type == STT_FUNC))
- ret = call_ovl_stub;
- else
- ret = br000_ovl_stub + lrlive;
- }
- /* If this insn isn't a branch then we are possibly taking the
- address of a function and passing it out somehow. Soft-icache code
- always generates inline code to do indirect branches. */
- if (!(branch || hint)
- && sym_type == STT_FUNC
- && htab->params->ovly_flavour != ovly_soft_icache)
- ret = nonovl_stub;
- return ret;
- }
- static bool
- count_stub (struct spu_link_hash_table *htab,
- bfd *ibfd,
- asection *isec,
- enum _stub_type stub_type,
- struct elf_link_hash_entry *h,
- const Elf_Internal_Rela *irela)
- {
- unsigned int ovl = 0;
- struct got_entry *g, **head;
- bfd_vma addend;
- /* If this instruction is a branch or call, we need a stub
- for it. One stub per function per overlay.
- If it isn't a branch, then we are taking the address of
- this function so need a stub in the non-overlay area
- for it. One stub per function. */
- if (stub_type != nonovl_stub)
- ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
- if (h != NULL)
- head = &h->got.glist;
- else
- {
- if (elf_local_got_ents (ibfd) == NULL)
- {
- bfd_size_type amt = (elf_tdata (ibfd)->symtab_hdr.sh_info
- * sizeof (*elf_local_got_ents (ibfd)));
- elf_local_got_ents (ibfd) = bfd_zmalloc (amt);
- if (elf_local_got_ents (ibfd) == NULL)
- return false;
- }
- head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
- }
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- htab->stub_count[ovl] += 1;
- return true;
- }
- addend = 0;
- if (irela != NULL)
- addend = irela->r_addend;
- if (ovl == 0)
- {
- struct got_entry *gnext;
- for (g = *head; g != NULL; g = g->next)
- if (g->addend == addend && g->ovl == 0)
- break;
- if (g == NULL)
- {
- /* Need a new non-overlay area stub. Zap other stubs. */
- for (g = *head; g != NULL; g = gnext)
- {
- gnext = g->next;
- if (g->addend == addend)
- {
- htab->stub_count[g->ovl] -= 1;
- free (g);
- }
- }
- }
- }
- else
- {
- for (g = *head; g != NULL; g = g->next)
- if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
- break;
- }
- if (g == NULL)
- {
- g = bfd_malloc (sizeof *g);
- if (g == NULL)
- return false;
- g->ovl = ovl;
- g->addend = addend;
- g->stub_addr = (bfd_vma) -1;
- g->next = *head;
- *head = g;
- htab->stub_count[ovl] += 1;
- }
- return true;
- }
- /* Support two sizes of overlay stubs, a slower more compact stub of two
- instructions, and a faster stub of four instructions.
- Soft-icache stubs are four or eight words. */
- static unsigned int
- ovl_stub_size (struct spu_elf_params *params)
- {
- return 16 << params->ovly_flavour >> params->compact_stub;
- }
- static unsigned int
- ovl_stub_size_log2 (struct spu_elf_params *params)
- {
- return 4 + params->ovly_flavour - params->compact_stub;
- }
- /* Two instruction overlay stubs look like:
- brsl $75,__ovly_load
- .word target_ovl_and_address
- ovl_and_address is a word with the overlay number in the top 14 bits
- and local store address in the bottom 18 bits.
- Four instruction overlay stubs look like:
- ila $78,ovl_number
- lnop
- ila $79,target_address
- br __ovly_load
- Software icache stubs are:
- .word target_index
- .word target_ia;
- .word lrlive_branchlocalstoreaddr;
- brasl $75,__icache_br_handler
- .quad xor_pattern
- */
- static bool
- build_stub (struct bfd_link_info *info,
- bfd *ibfd,
- asection *isec,
- enum _stub_type stub_type,
- struct elf_link_hash_entry *h,
- const Elf_Internal_Rela *irela,
- bfd_vma dest,
- asection *dest_sec)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- unsigned int ovl, dest_ovl, set_id;
- struct got_entry *g, **head;
- asection *sec;
- bfd_vma addend, from, to, br_dest, patt;
- unsigned int lrlive;
- ovl = 0;
- if (stub_type != nonovl_stub)
- ovl = spu_elf_section_data (isec->output_section)->u.o.ovl_index;
- if (h != NULL)
- head = &h->got.glist;
- else
- head = elf_local_got_ents (ibfd) + ELF32_R_SYM (irela->r_info);
- addend = 0;
- if (irela != NULL)
- addend = irela->r_addend;
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- g = bfd_malloc (sizeof *g);
- if (g == NULL)
- return false;
- g->ovl = ovl;
- g->br_addr = 0;
- if (irela != NULL)
- g->br_addr = (irela->r_offset
- + isec->output_offset
- + isec->output_section->vma);
- g->next = *head;
- *head = g;
- }
- else
- {
- for (g = *head; g != NULL; g = g->next)
- if (g->addend == addend && (g->ovl == ovl || g->ovl == 0))
- break;
- if (g == NULL)
- abort ();
- if (g->ovl == 0 && ovl != 0)
- return true;
- if (g->stub_addr != (bfd_vma) -1)
- return true;
- }
- sec = htab->stub_sec[ovl];
- dest += dest_sec->output_offset + dest_sec->output_section->vma;
- from = sec->size + sec->output_offset + sec->output_section->vma;
- g->stub_addr = from;
- to = (htab->ovly_entry[0]->root.u.def.value
- + htab->ovly_entry[0]->root.u.def.section->output_offset
- + htab->ovly_entry[0]->root.u.def.section->output_section->vma);
- if (((dest | to | from) & 3) != 0)
- {
- htab->stub_err = 1;
- return false;
- }
- dest_ovl = spu_elf_section_data (dest_sec->output_section)->u.o.ovl_index;
- if (htab->params->ovly_flavour == ovly_normal
- && !htab->params->compact_stub)
- {
- bfd_put_32 (sec->owner, ILA + ((dest_ovl << 7) & 0x01ffff80) + 78,
- sec->contents + sec->size);
- bfd_put_32 (sec->owner, LNOP,
- sec->contents + sec->size + 4);
- bfd_put_32 (sec->owner, ILA + ((dest << 7) & 0x01ffff80) + 79,
- sec->contents + sec->size + 8);
- if (!BRA_STUBS)
- bfd_put_32 (sec->owner, BR + (((to - (from + 12)) << 5) & 0x007fff80),
- sec->contents + sec->size + 12);
- else
- bfd_put_32 (sec->owner, BRA + ((to << 5) & 0x007fff80),
- sec->contents + sec->size + 12);
- }
- else if (htab->params->ovly_flavour == ovly_normal
- && htab->params->compact_stub)
- {
- if (!BRA_STUBS)
- bfd_put_32 (sec->owner, BRSL + (((to - from) << 5) & 0x007fff80) + 75,
- sec->contents + sec->size);
- else
- bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
- sec->contents + sec->size);
- bfd_put_32 (sec->owner, (dest & 0x3ffff) | (dest_ovl << 18),
- sec->contents + sec->size + 4);
- }
- else if (htab->params->ovly_flavour == ovly_soft_icache
- && htab->params->compact_stub)
- {
- lrlive = 0;
- if (stub_type == nonovl_stub)
- ;
- else if (stub_type == call_ovl_stub)
- /* A brsl makes lr live and *(*sp+16) is live.
- Tail calls have the same liveness. */
- lrlive = 5;
- else if (!htab->params->lrlive_analysis)
- /* Assume stack frame and lr save. */
- lrlive = 1;
- else if (irela != NULL)
- {
- /* Analyse branch instructions. */
- struct function_info *caller;
- bfd_vma off;
- caller = find_function (isec, irela->r_offset, info);
- if (caller->start == NULL)
- off = irela->r_offset;
- else
- {
- struct function_info *found = NULL;
- /* Find the earliest piece of this function that
- has frame adjusting instructions. We might
- see dynamic frame adjustment (eg. for alloca)
- in some later piece, but functions using
- alloca always set up a frame earlier. Frame
- setup instructions are always in one piece. */
- if (caller->lr_store != (bfd_vma) -1
- || caller->sp_adjust != (bfd_vma) -1)
- found = caller;
- while (caller->start != NULL)
- {
- caller = caller->start;
- if (caller->lr_store != (bfd_vma) -1
- || caller->sp_adjust != (bfd_vma) -1)
- found = caller;
- }
- if (found != NULL)
- caller = found;
- off = (bfd_vma) -1;
- }
- if (off > caller->sp_adjust)
- {
- if (off > caller->lr_store)
- /* Only *(*sp+16) is live. */
- lrlive = 1;
- else
- /* If no lr save, then we must be in a
- leaf function with a frame.
- lr is still live. */
- lrlive = 4;
- }
- else if (off > caller->lr_store)
- {
- /* Between lr save and stack adjust. */
- lrlive = 3;
- /* This should never happen since prologues won't
- be split here. */
- BFD_ASSERT (0);
- }
- else
- /* On entry to function. */
- lrlive = 5;
- if (stub_type != br000_ovl_stub
- && lrlive != stub_type - br000_ovl_stub)
- /* xgettext:c-format */
- info->callbacks->einfo (_("%pA:0x%v lrlive .brinfo (%u) differs "
- "from analysis (%u)\n"),
- isec, irela->r_offset, lrlive,
- stub_type - br000_ovl_stub);
- }
- /* If given lrlive info via .brinfo, use it. */
- if (stub_type > br000_ovl_stub)
- lrlive = stub_type - br000_ovl_stub;
- if (ovl == 0)
- to = (htab->ovly_entry[1]->root.u.def.value
- + htab->ovly_entry[1]->root.u.def.section->output_offset
- + htab->ovly_entry[1]->root.u.def.section->output_section->vma);
- /* The branch that uses this stub goes to stub_addr + 4. We'll
- set up an xor pattern that can be used by the icache manager
- to modify this branch to go directly to its destination. */
- g->stub_addr += 4;
- br_dest = g->stub_addr;
- if (irela == NULL)
- {
- /* Except in the case of _SPUEAR_ stubs, the branch in
- question is the one in the stub itself. */
- BFD_ASSERT (stub_type == nonovl_stub);
- g->br_addr = g->stub_addr;
- br_dest = to;
- }
- set_id = ((dest_ovl - 1) >> htab->num_lines_log2) + 1;
- bfd_put_32 (sec->owner, (set_id << 18) | (dest & 0x3ffff),
- sec->contents + sec->size);
- bfd_put_32 (sec->owner, BRASL + ((to << 5) & 0x007fff80) + 75,
- sec->contents + sec->size + 4);
- bfd_put_32 (sec->owner, (lrlive << 29) | (g->br_addr & 0x3ffff),
- sec->contents + sec->size + 8);
- patt = dest ^ br_dest;
- if (irela != NULL && ELF32_R_TYPE (irela->r_info) == R_SPU_REL16)
- patt = (dest - g->br_addr) ^ (br_dest - g->br_addr);
- bfd_put_32 (sec->owner, (patt << 5) & 0x007fff80,
- sec->contents + sec->size + 12);
- if (ovl == 0)
- /* Extra space for linked list entries. */
- sec->size += 16;
- }
- else
- abort ();
- sec->size += ovl_stub_size (htab->params);
- if (htab->params->emit_stub_syms)
- {
- size_t len;
- char *name;
- int add;
- len = 8 + sizeof (".ovl_call.") - 1;
- if (h != NULL)
- len += strlen (h->root.root.string);
- else
- len += 8 + 1 + 8;
- add = 0;
- if (irela != NULL)
- add = (int) irela->r_addend & 0xffffffff;
- if (add != 0)
- len += 1 + 8;
- name = bfd_malloc (len + 1);
- if (name == NULL)
- return false;
- sprintf (name, "%08x.ovl_call.", g->ovl);
- if (h != NULL)
- strcpy (name + 8 + sizeof (".ovl_call.") - 1, h->root.root.string);
- else
- sprintf (name + 8 + sizeof (".ovl_call.") - 1, "%x:%x",
- dest_sec->id & 0xffffffff,
- (int) ELF32_R_SYM (irela->r_info) & 0xffffffff);
- if (add != 0)
- sprintf (name + len - 9, "+%x", add);
- h = elf_link_hash_lookup (&htab->elf, name, true, true, false);
- free (name);
- if (h == NULL)
- return false;
- if (h->root.type == bfd_link_hash_new)
- {
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = sec;
- h->size = ovl_stub_size (htab->params);
- h->root.u.def.value = sec->size - h->size;
- h->type = STT_FUNC;
- h->ref_regular = 1;
- h->def_regular = 1;
- h->ref_regular_nonweak = 1;
- h->forced_local = 1;
- h->non_elf = 0;
- }
- }
- return true;
- }
- /* Called via elf_link_hash_traverse to allocate stubs for any _SPUEAR_
- symbols. */
- static bool
- allocate_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
- {
- /* Symbols starting with _SPUEAR_ need a stub because they may be
- invoked by the PPU. */
- struct bfd_link_info *info = inf;
- struct spu_link_hash_table *htab = spu_hash_table (info);
- asection *sym_sec;
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->def_regular
- && startswith (h->root.root.string, "_SPUEAR_")
- && (sym_sec = h->root.u.def.section) != NULL
- && sym_sec->output_section != bfd_abs_section_ptr
- && spu_elf_section_data (sym_sec->output_section) != NULL
- && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
- || htab->params->non_overlay_stubs))
- {
- return count_stub (htab, NULL, NULL, nonovl_stub, h, NULL);
- }
- return true;
- }
- static bool
- build_spuear_stubs (struct elf_link_hash_entry *h, void *inf)
- {
- /* Symbols starting with _SPUEAR_ need a stub because they may be
- invoked by the PPU. */
- struct bfd_link_info *info = inf;
- struct spu_link_hash_table *htab = spu_hash_table (info);
- asection *sym_sec;
- if ((h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->def_regular
- && startswith (h->root.root.string, "_SPUEAR_")
- && (sym_sec = h->root.u.def.section) != NULL
- && sym_sec->output_section != bfd_abs_section_ptr
- && spu_elf_section_data (sym_sec->output_section) != NULL
- && (spu_elf_section_data (sym_sec->output_section)->u.o.ovl_index != 0
- || htab->params->non_overlay_stubs))
- {
- return build_stub (info, NULL, NULL, nonovl_stub, h, NULL,
- h->root.u.def.value, sym_sec);
- }
- return true;
- }
- /* Size or build stubs. */
- static bool
- process_stubs (struct bfd_link_info *info, bool build)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- bfd *ibfd;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- Elf_Internal_Shdr *symtab_hdr;
- asection *isec;
- Elf_Internal_Sym *local_syms = NULL;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- /* We'll need the symbol table in a second. */
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- if (symtab_hdr->sh_info == 0)
- continue;
- /* Walk over each section attached to the input bfd. */
- for (isec = ibfd->sections; isec != NULL; isec = isec->next)
- {
- Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
- /* If there aren't any relocs, then there's nothing more to do. */
- if ((isec->flags & SEC_RELOC) == 0
- || isec->reloc_count == 0)
- continue;
- if (!maybe_needs_stubs (isec))
- continue;
- /* Get the relocs. */
- internal_relocs = _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
- info->keep_memory);
- if (internal_relocs == NULL)
- goto error_ret_free_local;
- /* Now examine each relocation. */
- irela = internal_relocs;
- irelaend = irela + isec->reloc_count;
- for (; irela < irelaend; irela++)
- {
- enum elf_spu_reloc_type r_type;
- unsigned int r_indx;
- asection *sym_sec;
- Elf_Internal_Sym *sym;
- struct elf_link_hash_entry *h;
- enum _stub_type stub_type;
- r_type = ELF32_R_TYPE (irela->r_info);
- r_indx = ELF32_R_SYM (irela->r_info);
- if (r_type >= R_SPU_max)
- {
- bfd_set_error (bfd_error_bad_value);
- error_ret_free_internal:
- if (elf_section_data (isec)->relocs != internal_relocs)
- free (internal_relocs);
- error_ret_free_local:
- if (symtab_hdr->contents != (unsigned char *) local_syms)
- free (local_syms);
- return false;
- }
- /* Determine the reloc target section. */
- if (!get_sym_h (&h, &sym, &sym_sec, &local_syms, r_indx, ibfd))
- goto error_ret_free_internal;
- stub_type = needs_ovl_stub (h, sym, sym_sec, isec, irela,
- NULL, info);
- if (stub_type == no_stub)
- continue;
- else if (stub_type == stub_error)
- goto error_ret_free_internal;
- if (htab->stub_count == NULL)
- {
- bfd_size_type amt;
- amt = (htab->num_overlays + 1) * sizeof (*htab->stub_count);
- htab->stub_count = bfd_zmalloc (amt);
- if (htab->stub_count == NULL)
- goto error_ret_free_internal;
- }
- if (!build)
- {
- if (!count_stub (htab, ibfd, isec, stub_type, h, irela))
- goto error_ret_free_internal;
- }
- else
- {
- bfd_vma dest;
- if (h != NULL)
- dest = h->root.u.def.value;
- else
- dest = sym->st_value;
- dest += irela->r_addend;
- if (!build_stub (info, ibfd, isec, stub_type, h, irela,
- dest, sym_sec))
- goto error_ret_free_internal;
- }
- }
- /* We're done with the internal relocs, free them. */
- if (elf_section_data (isec)->relocs != internal_relocs)
- free (internal_relocs);
- }
- if (local_syms != NULL
- && symtab_hdr->contents != (unsigned char *) local_syms)
- {
- if (!info->keep_memory)
- free (local_syms);
- else
- symtab_hdr->contents = (unsigned char *) local_syms;
- }
- }
- return true;
- }
- /* Allocate space for overlay call and return stubs.
- Return 0 on error, 1 if no overlays, 2 otherwise. */
- int
- spu_elf_size_stubs (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab;
- bfd *ibfd;
- bfd_size_type amt;
- flagword flags;
- unsigned int i;
- asection *stub;
- if (!process_stubs (info, false))
- return 0;
- htab = spu_hash_table (info);
- elf_link_hash_traverse (&htab->elf, allocate_spuear_stubs, info);
- if (htab->stub_err)
- return 0;
- ibfd = info->input_bfds;
- if (htab->stub_count != NULL)
- {
- amt = (htab->num_overlays + 1) * sizeof (*htab->stub_sec);
- htab->stub_sec = bfd_zmalloc (amt);
- if (htab->stub_sec == NULL)
- return 0;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_READONLY
- | SEC_HAS_CONTENTS | SEC_IN_MEMORY);
- stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
- htab->stub_sec[0] = stub;
- if (stub == NULL
- || !bfd_set_section_alignment (stub,
- ovl_stub_size_log2 (htab->params)))
- return 0;
- stub->size = htab->stub_count[0] * ovl_stub_size (htab->params);
- if (htab->params->ovly_flavour == ovly_soft_icache)
- /* Extra space for linked list entries. */
- stub->size += htab->stub_count[0] * 16;
- for (i = 0; i < htab->num_overlays; ++i)
- {
- asection *osec = htab->ovl_sec[i];
- unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
- stub = bfd_make_section_anyway_with_flags (ibfd, ".stub", flags);
- htab->stub_sec[ovl] = stub;
- if (stub == NULL
- || !bfd_set_section_alignment (stub,
- ovl_stub_size_log2 (htab->params)))
- return 0;
- stub->size = htab->stub_count[ovl] * ovl_stub_size (htab->params);
- }
- }
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- /* Space for icache manager tables.
- a) Tag array, one quadword per cache line.
- b) Rewrite "to" list, one quadword per cache line.
- c) Rewrite "from" list, one byte per outgoing branch (rounded up to
- a power-of-two number of full quadwords) per cache line. */
- flags = SEC_ALLOC;
- htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
- if (htab->ovtab == NULL
- || !bfd_set_section_alignment (htab->ovtab, 4))
- return 0;
- htab->ovtab->size = (16 + 16 + (16 << htab->fromelem_size_log2))
- << htab->num_lines_log2;
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
- htab->init = bfd_make_section_anyway_with_flags (ibfd, ".ovini", flags);
- if (htab->init == NULL
- || !bfd_set_section_alignment (htab->init, 4))
- return 0;
- htab->init->size = 16;
- }
- else if (htab->stub_count == NULL)
- return 1;
- else
- {
- /* htab->ovtab consists of two arrays.
- . struct {
- . u32 vma;
- . u32 size;
- . u32 file_off;
- . u32 buf;
- . } _ovly_table[];
- .
- . struct {
- . u32 mapped;
- . } _ovly_buf_table[];
- . */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
- htab->ovtab = bfd_make_section_anyway_with_flags (ibfd, ".ovtab", flags);
- if (htab->ovtab == NULL
- || !bfd_set_section_alignment (htab->ovtab, 4))
- return 0;
- htab->ovtab->size = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
- }
- htab->toe = bfd_make_section_anyway_with_flags (ibfd, ".toe", SEC_ALLOC);
- if (htab->toe == NULL
- || !bfd_set_section_alignment (htab->toe, 4))
- return 0;
- htab->toe->size = 16;
- return 2;
- }
- /* Called from ld to place overlay manager data sections. This is done
- after the overlay manager itself is loaded, mainly so that the
- linker's htab->init section is placed after any other .ovl.init
- sections. */
- void
- spu_elf_place_overlay_data (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- unsigned int i;
- if (htab->stub_sec != NULL)
- {
- (*htab->params->place_spu_section) (htab->stub_sec[0], NULL, ".text");
- for (i = 0; i < htab->num_overlays; ++i)
- {
- asection *osec = htab->ovl_sec[i];
- unsigned int ovl = spu_elf_section_data (osec)->u.o.ovl_index;
- (*htab->params->place_spu_section) (htab->stub_sec[ovl], osec, NULL);
- }
- }
- if (htab->params->ovly_flavour == ovly_soft_icache)
- (*htab->params->place_spu_section) (htab->init, NULL, ".ovl.init");
- if (htab->ovtab != NULL)
- {
- const char *ovout = ".data";
- if (htab->params->ovly_flavour == ovly_soft_icache)
- ovout = ".bss";
- (*htab->params->place_spu_section) (htab->ovtab, NULL, ovout);
- }
- if (htab->toe != NULL)
- (*htab->params->place_spu_section) (htab->toe, NULL, ".toe");
- }
- /* Functions to handle embedded spu_ovl.o object. */
- static void *
- ovl_mgr_open (struct bfd *nbfd ATTRIBUTE_UNUSED, void *stream)
- {
- return stream;
- }
- static file_ptr
- ovl_mgr_pread (struct bfd *abfd ATTRIBUTE_UNUSED,
- void *stream,
- void *buf,
- file_ptr nbytes,
- file_ptr offset)
- {
- struct _ovl_stream *os;
- size_t count;
- size_t max;
- os = (struct _ovl_stream *) stream;
- max = (const char *) os->end - (const char *) os->start;
- if ((ufile_ptr) offset >= max)
- return 0;
- count = nbytes;
- if (count > max - offset)
- count = max - offset;
- memcpy (buf, (const char *) os->start + offset, count);
- return count;
- }
- static int
- ovl_mgr_stat (struct bfd *abfd ATTRIBUTE_UNUSED,
- void *stream,
- struct stat *sb)
- {
- struct _ovl_stream *os = (struct _ovl_stream *) stream;
- memset (sb, 0, sizeof (*sb));
- sb->st_size = (const char *) os->end - (const char *) os->start;
- return 0;
- }
- bool
- spu_elf_open_builtin_lib (bfd **ovl_bfd, const struct _ovl_stream *stream)
- {
- *ovl_bfd = bfd_openr_iovec ("builtin ovl_mgr",
- "elf32-spu",
- ovl_mgr_open,
- (void *) stream,
- ovl_mgr_pread,
- NULL,
- ovl_mgr_stat);
- return *ovl_bfd != NULL;
- }
- static unsigned int
- overlay_index (asection *sec)
- {
- if (sec == NULL
- || sec->output_section == bfd_abs_section_ptr)
- return 0;
- return spu_elf_section_data (sec->output_section)->u.o.ovl_index;
- }
- /* Define an STT_OBJECT symbol. */
- static struct elf_link_hash_entry *
- define_ovtab_symbol (struct spu_link_hash_table *htab, const char *name)
- {
- struct elf_link_hash_entry *h;
- h = elf_link_hash_lookup (&htab->elf, name, true, false, false);
- if (h == NULL)
- return NULL;
- if (h->root.type != bfd_link_hash_defined
- || !h->def_regular)
- {
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = htab->ovtab;
- h->type = STT_OBJECT;
- h->ref_regular = 1;
- h->def_regular = 1;
- h->ref_regular_nonweak = 1;
- h->non_elf = 0;
- }
- else if (h->root.u.def.section->owner != NULL)
- {
- /* xgettext:c-format */
- _bfd_error_handler (_("%pB is not allowed to define %s"),
- h->root.u.def.section->owner,
- h->root.root.string);
- bfd_set_error (bfd_error_bad_value);
- return NULL;
- }
- else
- {
- _bfd_error_handler (_("you are not allowed to define %s in a script"),
- h->root.root.string);
- bfd_set_error (bfd_error_bad_value);
- return NULL;
- }
- return h;
- }
- /* Fill in all stubs and the overlay tables. */
- static bool
- spu_elf_build_stubs (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- struct elf_link_hash_entry *h;
- bfd_byte *p;
- asection *s;
- bfd *obfd;
- unsigned int i;
- if (htab->num_overlays != 0)
- {
- for (i = 0; i < 2; i++)
- {
- h = htab->ovly_entry[i];
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->def_regular)
- {
- s = h->root.u.def.section->output_section;
- if (spu_elf_section_data (s)->u.o.ovl_index)
- {
- _bfd_error_handler (_("%s in overlay section"),
- h->root.root.string);
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- }
- }
- }
- if (htab->stub_sec != NULL)
- {
- for (i = 0; i <= htab->num_overlays; i++)
- if (htab->stub_sec[i]->size != 0)
- {
- htab->stub_sec[i]->contents = bfd_zalloc (htab->stub_sec[i]->owner,
- htab->stub_sec[i]->size);
- if (htab->stub_sec[i]->contents == NULL)
- return false;
- htab->stub_sec[i]->rawsize = htab->stub_sec[i]->size;
- htab->stub_sec[i]->size = 0;
- }
- /* Fill in all the stubs. */
- process_stubs (info, true);
- if (!htab->stub_err)
- elf_link_hash_traverse (&htab->elf, build_spuear_stubs, info);
- if (htab->stub_err)
- {
- _bfd_error_handler (_("overlay stub relocation overflow"));
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- for (i = 0; i <= htab->num_overlays; i++)
- {
- if (htab->stub_sec[i]->size != htab->stub_sec[i]->rawsize)
- {
- _bfd_error_handler (_("stubs don't match calculated size"));
- bfd_set_error (bfd_error_bad_value);
- return false;
- }
- htab->stub_sec[i]->rawsize = 0;
- }
- }
- if (htab->ovtab == NULL || htab->ovtab->size == 0)
- return true;
- htab->ovtab->contents = bfd_zalloc (htab->ovtab->owner, htab->ovtab->size);
- if (htab->ovtab->contents == NULL)
- return false;
- p = htab->ovtab->contents;
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- bfd_vma off;
- h = define_ovtab_symbol (htab, "__icache_tag_array");
- if (h == NULL)
- return false;
- h->root.u.def.value = 0;
- h->size = 16 << htab->num_lines_log2;
- off = h->size;
- h = define_ovtab_symbol (htab, "__icache_tag_array_size");
- if (h == NULL)
- return false;
- h->root.u.def.value = 16 << htab->num_lines_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_rewrite_to");
- if (h == NULL)
- return false;
- h->root.u.def.value = off;
- h->size = 16 << htab->num_lines_log2;
- off += h->size;
- h = define_ovtab_symbol (htab, "__icache_rewrite_to_size");
- if (h == NULL)
- return false;
- h->root.u.def.value = 16 << htab->num_lines_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_rewrite_from");
- if (h == NULL)
- return false;
- h->root.u.def.value = off;
- h->size = 16 << (htab->fromelem_size_log2 + htab->num_lines_log2);
- off += h->size;
- h = define_ovtab_symbol (htab, "__icache_rewrite_from_size");
- if (h == NULL)
- return false;
- h->root.u.def.value = 16 << (htab->fromelem_size_log2
- + htab->num_lines_log2);
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_log2_fromelemsize");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->fromelem_size_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_base");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->ovl_sec[0]->vma;
- h->root.u.def.section = bfd_abs_section_ptr;
- h->size = htab->num_buf << htab->line_size_log2;
- h = define_ovtab_symbol (htab, "__icache_linesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = 1 << htab->line_size_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_log2_linesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->line_size_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_neg_log2_linesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = -htab->line_size_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_cachesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = 1 << (htab->num_lines_log2 + htab->line_size_log2);
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_log2_cachesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->num_lines_log2 + htab->line_size_log2;
- h->root.u.def.section = bfd_abs_section_ptr;
- h = define_ovtab_symbol (htab, "__icache_neg_log2_cachesize");
- if (h == NULL)
- return false;
- h->root.u.def.value = -(htab->num_lines_log2 + htab->line_size_log2);
- h->root.u.def.section = bfd_abs_section_ptr;
- if (htab->init != NULL && htab->init->size != 0)
- {
- htab->init->contents = bfd_zalloc (htab->init->owner,
- htab->init->size);
- if (htab->init->contents == NULL)
- return false;
- h = define_ovtab_symbol (htab, "__icache_fileoff");
- if (h == NULL)
- return false;
- h->root.u.def.value = 0;
- h->root.u.def.section = htab->init;
- h->size = 8;
- }
- }
- else
- {
- /* Write out _ovly_table. */
- /* set low bit of .size to mark non-overlay area as present. */
- p[7] = 1;
- obfd = htab->ovtab->output_section->owner;
- for (s = obfd->sections; s != NULL; s = s->next)
- {
- unsigned int ovl_index = spu_elf_section_data (s)->u.o.ovl_index;
- if (ovl_index != 0)
- {
- unsigned long off = ovl_index * 16;
- unsigned int ovl_buf = spu_elf_section_data (s)->u.o.ovl_buf;
- bfd_put_32 (htab->ovtab->owner, s->vma, p + off);
- bfd_put_32 (htab->ovtab->owner, (s->size + 15) & -16,
- p + off + 4);
- /* file_off written later in spu_elf_modify_headers. */
- bfd_put_32 (htab->ovtab->owner, ovl_buf, p + off + 12);
- }
- }
- h = define_ovtab_symbol (htab, "_ovly_table");
- if (h == NULL)
- return false;
- h->root.u.def.value = 16;
- h->size = htab->num_overlays * 16;
- h = define_ovtab_symbol (htab, "_ovly_table_end");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->num_overlays * 16 + 16;
- h->size = 0;
- h = define_ovtab_symbol (htab, "_ovly_buf_table");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->num_overlays * 16 + 16;
- h->size = htab->num_buf * 4;
- h = define_ovtab_symbol (htab, "_ovly_buf_table_end");
- if (h == NULL)
- return false;
- h->root.u.def.value = htab->num_overlays * 16 + 16 + htab->num_buf * 4;
- h->size = 0;
- }
- h = define_ovtab_symbol (htab, "_EAR_");
- if (h == NULL)
- return false;
- h->root.u.def.section = htab->toe;
- h->root.u.def.value = 0;
- h->size = 16;
- return true;
- }
- /* Check that all loadable section VMAs lie in the range
- LO .. HI inclusive, and stash some parameters for --auto-overlay. */
- asection *
- spu_elf_check_vma (struct bfd_link_info *info)
- {
- struct elf_segment_map *m;
- unsigned int i;
- struct spu_link_hash_table *htab = spu_hash_table (info);
- bfd *abfd = info->output_bfd;
- bfd_vma hi = htab->params->local_store_hi;
- bfd_vma lo = htab->params->local_store_lo;
- htab->local_store = hi + 1 - lo;
- for (m = elf_seg_map (abfd); m != NULL; m = m->next)
- if (m->p_type == PT_LOAD)
- for (i = 0; i < m->count; i++)
- if (m->sections[i]->size != 0
- && (m->sections[i]->vma < lo
- || m->sections[i]->vma > hi
- || m->sections[i]->vma + m->sections[i]->size - 1 > hi))
- return m->sections[i];
- return NULL;
- }
- /* OFFSET in SEC (presumably) is the beginning of a function prologue.
- Search for stack adjusting insns, and return the sp delta.
- If a store of lr is found save the instruction offset to *LR_STORE.
- If a stack adjusting instruction is found, save that offset to
- *SP_ADJUST. */
- static int
- find_function_stack_adjust (asection *sec,
- bfd_vma offset,
- bfd_vma *lr_store,
- bfd_vma *sp_adjust)
- {
- int32_t reg[128];
- memset (reg, 0, sizeof (reg));
- for ( ; offset + 4 <= sec->size; offset += 4)
- {
- unsigned char buf[4];
- int rt, ra;
- uint32_t imm;
- /* Assume no relocs on stack adjusing insns. */
- if (!bfd_get_section_contents (sec->owner, sec, buf, offset, 4))
- break;
- rt = buf[3] & 0x7f;
- ra = ((buf[2] & 0x3f) << 1) | (buf[3] >> 7);
- if (buf[0] == 0x24 /* stqd */)
- {
- if (rt == 0 /* lr */ && ra == 1 /* sp */)
- *lr_store = offset;
- continue;
- }
- /* Partly decoded immediate field. */
- imm = (buf[1] << 9) | (buf[2] << 1) | (buf[3] >> 7);
- if (buf[0] == 0x1c /* ai */)
- {
- imm >>= 7;
- imm = (imm ^ 0x200) - 0x200;
- reg[rt] = reg[ra] + imm;
- if (rt == 1 /* sp */)
- {
- if (reg[rt] > 0)
- break;
- *sp_adjust = offset;
- return reg[rt];
- }
- }
- else if (buf[0] == 0x18 && (buf[1] & 0xe0) == 0 /* a */)
- {
- int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
- reg[rt] = reg[ra] + reg[rb];
- if (rt == 1)
- {
- if (reg[rt] > 0)
- break;
- *sp_adjust = offset;
- return reg[rt];
- }
- }
- else if (buf[0] == 0x08 && (buf[1] & 0xe0) == 0 /* sf */)
- {
- int rb = ((buf[1] & 0x1f) << 2) | ((buf[2] & 0xc0) >> 6);
- reg[rt] = reg[rb] - reg[ra];
- if (rt == 1)
- {
- if (reg[rt] > 0)
- break;
- *sp_adjust = offset;
- return reg[rt];
- }
- }
- else if ((buf[0] & 0xfc) == 0x40 /* il, ilh, ilhu, ila */)
- {
- if (buf[0] >= 0x42 /* ila */)
- imm |= (buf[0] & 1) << 17;
- else
- {
- imm &= 0xffff;
- if (buf[0] == 0x40 /* il */)
- {
- if ((buf[1] & 0x80) == 0)
- continue;
- imm = (imm ^ 0x8000) - 0x8000;
- }
- else if ((buf[1] & 0x80) == 0 /* ilhu */)
- imm <<= 16;
- }
- reg[rt] = imm;
- continue;
- }
- else if (buf[0] == 0x60 && (buf[1] & 0x80) != 0 /* iohl */)
- {
- reg[rt] |= imm & 0xffff;
- continue;
- }
- else if (buf[0] == 0x04 /* ori */)
- {
- imm >>= 7;
- imm = (imm ^ 0x200) - 0x200;
- reg[rt] = reg[ra] | imm;
- continue;
- }
- else if (buf[0] == 0x32 && (buf[1] & 0x80) != 0 /* fsmbi */)
- {
- reg[rt] = ( ((imm & 0x8000) ? 0xff000000 : 0)
- | ((imm & 0x4000) ? 0x00ff0000 : 0)
- | ((imm & 0x2000) ? 0x0000ff00 : 0)
- | ((imm & 0x1000) ? 0x000000ff : 0));
- continue;
- }
- else if (buf[0] == 0x16 /* andbi */)
- {
- imm >>= 7;
- imm &= 0xff;
- imm |= imm << 8;
- imm |= imm << 16;
- reg[rt] = reg[ra] & imm;
- continue;
- }
- else if (buf[0] == 0x33 && imm == 1 /* brsl .+4 */)
- {
- /* Used in pic reg load. Say rt is trashed. Won't be used
- in stack adjust, but we need to continue past this branch. */
- reg[rt] = 0;
- continue;
- }
- else if (is_branch (buf) || is_indirect_branch (buf))
- /* If we hit a branch then we must be out of the prologue. */
- break;
- }
- return 0;
- }
- /* qsort predicate to sort symbols by section and value. */
- static Elf_Internal_Sym *sort_syms_syms;
- static asection **sort_syms_psecs;
- static int
- sort_syms (const void *a, const void *b)
- {
- Elf_Internal_Sym *const *s1 = a;
- Elf_Internal_Sym *const *s2 = b;
- asection *sec1,*sec2;
- bfd_signed_vma delta;
- sec1 = sort_syms_psecs[*s1 - sort_syms_syms];
- sec2 = sort_syms_psecs[*s2 - sort_syms_syms];
- if (sec1 != sec2)
- return sec1->index - sec2->index;
- delta = (*s1)->st_value - (*s2)->st_value;
- if (delta != 0)
- return delta < 0 ? -1 : 1;
- delta = (*s2)->st_size - (*s1)->st_size;
- if (delta != 0)
- return delta < 0 ? -1 : 1;
- return *s1 < *s2 ? -1 : 1;
- }
- /* Allocate a struct spu_elf_stack_info with MAX_FUN struct function_info
- entries for section SEC. */
- static struct spu_elf_stack_info *
- alloc_stack_info (asection *sec, int max_fun)
- {
- struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
- bfd_size_type amt;
- amt = sizeof (struct spu_elf_stack_info);
- amt += (max_fun - 1) * sizeof (struct function_info);
- sec_data->u.i.stack_info = bfd_zmalloc (amt);
- if (sec_data->u.i.stack_info != NULL)
- sec_data->u.i.stack_info->max_fun = max_fun;
- return sec_data->u.i.stack_info;
- }
- /* Add a new struct function_info describing a (part of a) function
- starting at SYM_H. Keep the array sorted by address. */
- static struct function_info *
- maybe_insert_function (asection *sec,
- void *sym_h,
- bool global,
- bool is_func)
- {
- struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
- struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
- int i;
- bfd_vma off, size;
- if (sinfo == NULL)
- {
- sinfo = alloc_stack_info (sec, 20);
- if (sinfo == NULL)
- return NULL;
- }
- if (!global)
- {
- Elf_Internal_Sym *sym = sym_h;
- off = sym->st_value;
- size = sym->st_size;
- }
- else
- {
- struct elf_link_hash_entry *h = sym_h;
- off = h->root.u.def.value;
- size = h->size;
- }
- for (i = sinfo->num_fun; --i >= 0; )
- if (sinfo->fun[i].lo <= off)
- break;
- if (i >= 0)
- {
- /* Don't add another entry for an alias, but do update some
- info. */
- if (sinfo->fun[i].lo == off)
- {
- /* Prefer globals over local syms. */
- if (global && !sinfo->fun[i].global)
- {
- sinfo->fun[i].global = true;
- sinfo->fun[i].u.h = sym_h;
- }
- if (is_func)
- sinfo->fun[i].is_func = true;
- return &sinfo->fun[i];
- }
- /* Ignore a zero-size symbol inside an existing function. */
- else if (sinfo->fun[i].hi > off && size == 0)
- return &sinfo->fun[i];
- }
- if (sinfo->num_fun >= sinfo->max_fun)
- {
- bfd_size_type amt = sizeof (struct spu_elf_stack_info);
- bfd_size_type old = amt;
- old += (sinfo->max_fun - 1) * sizeof (struct function_info);
- sinfo->max_fun += 20 + (sinfo->max_fun >> 1);
- amt += (sinfo->max_fun - 1) * sizeof (struct function_info);
- sinfo = bfd_realloc (sinfo, amt);
- if (sinfo == NULL)
- return NULL;
- memset ((char *) sinfo + old, 0, amt - old);
- sec_data->u.i.stack_info = sinfo;
- }
- if (++i < sinfo->num_fun)
- memmove (&sinfo->fun[i + 1], &sinfo->fun[i],
- (sinfo->num_fun - i) * sizeof (sinfo->fun[i]));
- sinfo->fun[i].is_func = is_func;
- sinfo->fun[i].global = global;
- sinfo->fun[i].sec = sec;
- if (global)
- sinfo->fun[i].u.h = sym_h;
- else
- sinfo->fun[i].u.sym = sym_h;
- sinfo->fun[i].lo = off;
- sinfo->fun[i].hi = off + size;
- sinfo->fun[i].lr_store = -1;
- sinfo->fun[i].sp_adjust = -1;
- sinfo->fun[i].stack = -find_function_stack_adjust (sec, off,
- &sinfo->fun[i].lr_store,
- &sinfo->fun[i].sp_adjust);
- sinfo->num_fun += 1;
- return &sinfo->fun[i];
- }
- /* Return the name of FUN. */
- static const char *
- func_name (struct function_info *fun)
- {
- asection *sec;
- bfd *ibfd;
- Elf_Internal_Shdr *symtab_hdr;
- while (fun->start != NULL)
- fun = fun->start;
- if (fun->global)
- return fun->u.h->root.root.string;
- sec = fun->sec;
- if (fun->u.sym->st_name == 0)
- {
- size_t len = strlen (sec->name);
- char *name = bfd_malloc (len + 10);
- if (name == NULL)
- return "(null)";
- sprintf (name, "%s+%lx", sec->name,
- (unsigned long) fun->u.sym->st_value & 0xffffffff);
- return name;
- }
- ibfd = sec->owner;
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- return bfd_elf_sym_name (ibfd, symtab_hdr, fun->u.sym, sec);
- }
- /* Read the instruction at OFF in SEC. Return true iff the instruction
- is a nop, lnop, or stop 0 (all zero insn). */
- static bool
- is_nop (asection *sec, bfd_vma off)
- {
- unsigned char insn[4];
- if (off + 4 > sec->size
- || !bfd_get_section_contents (sec->owner, sec, insn, off, 4))
- return false;
- if ((insn[0] & 0xbf) == 0 && (insn[1] & 0xe0) == 0x20)
- return true;
- if (insn[0] == 0 && insn[1] == 0 && insn[2] == 0 && insn[3] == 0)
- return true;
- return false;
- }
- /* Extend the range of FUN to cover nop padding up to LIMIT.
- Return TRUE iff some instruction other than a NOP was found. */
- static bool
- insns_at_end (struct function_info *fun, bfd_vma limit)
- {
- bfd_vma off = (fun->hi + 3) & -4;
- while (off < limit && is_nop (fun->sec, off))
- off += 4;
- if (off < limit)
- {
- fun->hi = off;
- return true;
- }
- fun->hi = limit;
- return false;
- }
- /* Check and fix overlapping function ranges. Return TRUE iff there
- are gaps in the current info we have about functions in SEC. */
- static bool
- check_function_ranges (asection *sec, struct bfd_link_info *info)
- {
- struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
- struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
- int i;
- bool gaps = false;
- if (sinfo == NULL)
- return false;
- for (i = 1; i < sinfo->num_fun; i++)
- if (sinfo->fun[i - 1].hi > sinfo->fun[i].lo)
- {
- /* Fix overlapping symbols. */
- const char *f1 = func_name (&sinfo->fun[i - 1]);
- const char *f2 = func_name (&sinfo->fun[i]);
- /* xgettext:c-format */
- info->callbacks->einfo (_("warning: %s overlaps %s\n"), f1, f2);
- sinfo->fun[i - 1].hi = sinfo->fun[i].lo;
- }
- else if (insns_at_end (&sinfo->fun[i - 1], sinfo->fun[i].lo))
- gaps = true;
- if (sinfo->num_fun == 0)
- gaps = true;
- else
- {
- if (sinfo->fun[0].lo != 0)
- gaps = true;
- if (sinfo->fun[sinfo->num_fun - 1].hi > sec->size)
- {
- const char *f1 = func_name (&sinfo->fun[sinfo->num_fun - 1]);
- info->callbacks->einfo (_("warning: %s exceeds section size\n"), f1);
- sinfo->fun[sinfo->num_fun - 1].hi = sec->size;
- }
- else if (insns_at_end (&sinfo->fun[sinfo->num_fun - 1], sec->size))
- gaps = true;
- }
- return gaps;
- }
- /* Search current function info for a function that contains address
- OFFSET in section SEC. */
- static struct function_info *
- find_function (asection *sec, bfd_vma offset, struct bfd_link_info *info)
- {
- struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
- struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
- int lo, hi, mid;
- lo = 0;
- hi = sinfo->num_fun;
- while (lo < hi)
- {
- mid = (lo + hi) / 2;
- if (offset < sinfo->fun[mid].lo)
- hi = mid;
- else if (offset >= sinfo->fun[mid].hi)
- lo = mid + 1;
- else
- return &sinfo->fun[mid];
- }
- /* xgettext:c-format */
- info->callbacks->einfo (_("%pA:0x%v not found in function table\n"),
- sec, offset);
- bfd_set_error (bfd_error_bad_value);
- return NULL;
- }
- /* Add CALLEE to CALLER call list if not already present. Return TRUE
- if CALLEE was new. If this function return FALSE, CALLEE should
- be freed. */
- static bool
- insert_callee (struct function_info *caller, struct call_info *callee)
- {
- struct call_info **pp, *p;
- for (pp = &caller->call_list; (p = *pp) != NULL; pp = &p->next)
- if (p->fun == callee->fun)
- {
- /* Tail calls use less stack than normal calls. Retain entry
- for normal call over one for tail call. */
- p->is_tail &= callee->is_tail;
- if (!p->is_tail)
- {
- p->fun->start = NULL;
- p->fun->is_func = true;
- }
- p->count += callee->count;
- /* Reorder list so most recent call is first. */
- *pp = p->next;
- p->next = caller->call_list;
- caller->call_list = p;
- return false;
- }
- callee->next = caller->call_list;
- caller->call_list = callee;
- return true;
- }
- /* Copy CALL and insert the copy into CALLER. */
- static bool
- copy_callee (struct function_info *caller, const struct call_info *call)
- {
- struct call_info *callee;
- callee = bfd_malloc (sizeof (*callee));
- if (callee == NULL)
- return false;
- *callee = *call;
- if (!insert_callee (caller, callee))
- free (callee);
- return true;
- }
- /* We're only interested in code sections. Testing SEC_IN_MEMORY excludes
- overlay stub sections. */
- static bool
- interesting_section (asection *s)
- {
- return (s->output_section != bfd_abs_section_ptr
- && ((s->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_IN_MEMORY))
- == (SEC_ALLOC | SEC_LOAD | SEC_CODE))
- && s->size != 0);
- }
- /* Rummage through the relocs for SEC, looking for function calls.
- If CALL_TREE is true, fill in call graph. If CALL_TREE is false,
- mark destination symbols on calls as being functions. Also
- look at branches, which may be tail calls or go to hot/cold
- section part of same function. */
- static bool
- mark_functions_via_relocs (asection *sec,
- struct bfd_link_info *info,
- int call_tree)
- {
- Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
- Elf_Internal_Shdr *symtab_hdr;
- void *psyms;
- unsigned int priority = 0;
- static bool warned;
- if (!interesting_section (sec)
- || sec->reloc_count == 0)
- return true;
- internal_relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
- info->keep_memory);
- if (internal_relocs == NULL)
- return false;
- symtab_hdr = &elf_tdata (sec->owner)->symtab_hdr;
- psyms = &symtab_hdr->contents;
- irela = internal_relocs;
- irelaend = irela + sec->reloc_count;
- for (; irela < irelaend; irela++)
- {
- enum elf_spu_reloc_type r_type;
- unsigned int r_indx;
- asection *sym_sec;
- Elf_Internal_Sym *sym;
- struct elf_link_hash_entry *h;
- bfd_vma val;
- bool nonbranch, is_call;
- struct function_info *caller;
- struct call_info *callee;
- r_type = ELF32_R_TYPE (irela->r_info);
- nonbranch = r_type != R_SPU_REL16 && r_type != R_SPU_ADDR16;
- r_indx = ELF32_R_SYM (irela->r_info);
- if (!get_sym_h (&h, &sym, &sym_sec, psyms, r_indx, sec->owner))
- return false;
- if (sym_sec == NULL
- || sym_sec->output_section == bfd_abs_section_ptr)
- continue;
- is_call = false;
- if (!nonbranch)
- {
- unsigned char insn[4];
- if (!bfd_get_section_contents (sec->owner, sec, insn,
- irela->r_offset, 4))
- return false;
- if (is_branch (insn))
- {
- is_call = (insn[0] & 0xfd) == 0x31;
- priority = insn[1] & 0x0f;
- priority <<= 8;
- priority |= insn[2];
- priority <<= 8;
- priority |= insn[3];
- priority >>= 7;
- if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
- != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
- {
- if (!warned)
- info->callbacks->einfo
- /* xgettext:c-format */
- (_("%pB(%pA+0x%v): call to non-code section"
- " %pB(%pA), analysis incomplete\n"),
- sec->owner, sec, irela->r_offset,
- sym_sec->owner, sym_sec);
- warned = true;
- continue;
- }
- }
- else
- {
- nonbranch = true;
- if (is_hint (insn))
- continue;
- }
- }
- if (nonbranch)
- {
- /* For --auto-overlay, count possible stubs we need for
- function pointer references. */
- unsigned int sym_type;
- if (h)
- sym_type = h->type;
- else
- sym_type = ELF_ST_TYPE (sym->st_info);
- if (sym_type == STT_FUNC)
- {
- if (call_tree && spu_hash_table (info)->params->auto_overlay)
- spu_hash_table (info)->non_ovly_stub += 1;
- /* If the symbol type is STT_FUNC then this must be a
- function pointer initialisation. */
- continue;
- }
- /* Ignore data references. */
- if ((sym_sec->flags & (SEC_ALLOC | SEC_LOAD | SEC_CODE))
- != (SEC_ALLOC | SEC_LOAD | SEC_CODE))
- continue;
- /* Otherwise we probably have a jump table reloc for
- a switch statement or some other reference to a
- code label. */
- }
- if (h)
- val = h->root.u.def.value;
- else
- val = sym->st_value;
- val += irela->r_addend;
- if (!call_tree)
- {
- struct function_info *fun;
- if (irela->r_addend != 0)
- {
- Elf_Internal_Sym *fake = bfd_zmalloc (sizeof (*fake));
- if (fake == NULL)
- return false;
- fake->st_value = val;
- fake->st_shndx
- = _bfd_elf_section_from_bfd_section (sym_sec->owner, sym_sec);
- sym = fake;
- }
- if (sym)
- fun = maybe_insert_function (sym_sec, sym, false, is_call);
- else
- fun = maybe_insert_function (sym_sec, h, true, is_call);
- if (fun == NULL)
- return false;
- if (irela->r_addend != 0
- && fun->u.sym != sym)
- free (sym);
- continue;
- }
- caller = find_function (sec, irela->r_offset, info);
- if (caller == NULL)
- return false;
- callee = bfd_malloc (sizeof *callee);
- if (callee == NULL)
- return false;
- callee->fun = find_function (sym_sec, val, info);
- if (callee->fun == NULL)
- return false;
- callee->is_tail = !is_call;
- callee->is_pasted = false;
- callee->broken_cycle = false;
- callee->priority = priority;
- callee->count = nonbranch? 0 : 1;
- if (callee->fun->last_caller != sec)
- {
- callee->fun->last_caller = sec;
- callee->fun->call_count += 1;
- }
- if (!insert_callee (caller, callee))
- free (callee);
- else if (!is_call
- && !callee->fun->is_func
- && callee->fun->stack == 0)
- {
- /* This is either a tail call or a branch from one part of
- the function to another, ie. hot/cold section. If the
- destination has been called by some other function then
- it is a separate function. We also assume that functions
- are not split across input files. */
- if (sec->owner != sym_sec->owner)
- {
- callee->fun->start = NULL;
- callee->fun->is_func = true;
- }
- else if (callee->fun->start == NULL)
- {
- struct function_info *caller_start = caller;
- while (caller_start->start)
- caller_start = caller_start->start;
- if (caller_start != callee->fun)
- callee->fun->start = caller_start;
- }
- else
- {
- struct function_info *callee_start;
- struct function_info *caller_start;
- callee_start = callee->fun;
- while (callee_start->start)
- callee_start = callee_start->start;
- caller_start = caller;
- while (caller_start->start)
- caller_start = caller_start->start;
- if (caller_start != callee_start)
- {
- callee->fun->start = NULL;
- callee->fun->is_func = true;
- }
- }
- }
- }
- return true;
- }
- /* Handle something like .init or .fini, which has a piece of a function.
- These sections are pasted together to form a single function. */
- static bool
- pasted_function (asection *sec)
- {
- struct bfd_link_order *l;
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- Elf_Internal_Sym *fake;
- struct function_info *fun, *fun_start;
- fake = bfd_zmalloc (sizeof (*fake));
- if (fake == NULL)
- return false;
- fake->st_value = 0;
- fake->st_size = sec->size;
- fake->st_shndx
- = _bfd_elf_section_from_bfd_section (sec->owner, sec);
- fun = maybe_insert_function (sec, fake, false, false);
- if (!fun)
- return false;
- /* Find a function immediately preceding this section. */
- fun_start = NULL;
- for (l = sec->output_section->map_head.link_order; l != NULL; l = l->next)
- {
- if (l->u.indirect.section == sec)
- {
- if (fun_start != NULL)
- {
- struct call_info *callee = bfd_malloc (sizeof *callee);
- if (callee == NULL)
- return false;
- fun->start = fun_start;
- callee->fun = fun;
- callee->is_tail = true;
- callee->is_pasted = true;
- callee->broken_cycle = false;
- callee->priority = 0;
- callee->count = 1;
- if (!insert_callee (fun_start, callee))
- free (callee);
- return true;
- }
- break;
- }
- if (l->type == bfd_indirect_link_order
- && (sec_data = spu_elf_section_data (l->u.indirect.section)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL
- && sinfo->num_fun != 0)
- fun_start = &sinfo->fun[sinfo->num_fun - 1];
- }
- /* Don't return an error if we did not find a function preceding this
- section. The section may have incorrect flags. */
- return true;
- }
- /* Map address ranges in code sections to functions. */
- static bool
- discover_functions (struct bfd_link_info *info)
- {
- bfd *ibfd;
- int bfd_idx;
- Elf_Internal_Sym ***psym_arr;
- asection ***sec_arr;
- bool gaps = false;
- bfd_idx = 0;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- bfd_idx++;
- psym_arr = bfd_zmalloc (bfd_idx * sizeof (*psym_arr));
- if (psym_arr == NULL)
- return false;
- sec_arr = bfd_zmalloc (bfd_idx * sizeof (*sec_arr));
- if (sec_arr == NULL)
- return false;
- for (ibfd = info->input_bfds, bfd_idx = 0;
- ibfd != NULL;
- ibfd = ibfd->link.next, bfd_idx++)
- {
- extern const bfd_target spu_elf32_vec;
- Elf_Internal_Shdr *symtab_hdr;
- asection *sec;
- size_t symcount;
- Elf_Internal_Sym *syms, *sy, **psyms, **psy;
- asection **psecs, **p;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- /* Read all the symbols. */
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- symcount = symtab_hdr->sh_size / symtab_hdr->sh_entsize;
- if (symcount == 0)
- {
- if (!gaps)
- for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
- if (interesting_section (sec))
- {
- gaps = true;
- break;
- }
- continue;
- }
- /* Don't use cached symbols since the generic ELF linker
- code only reads local symbols, and we need globals too. */
- free (symtab_hdr->contents);
- symtab_hdr->contents = NULL;
- syms = bfd_elf_get_elf_syms (ibfd, symtab_hdr, symcount, 0,
- NULL, NULL, NULL);
- symtab_hdr->contents = (void *) syms;
- if (syms == NULL)
- return false;
- /* Select defined function symbols that are going to be output. */
- psyms = bfd_malloc ((symcount + 1) * sizeof (*psyms));
- if (psyms == NULL)
- return false;
- psym_arr[bfd_idx] = psyms;
- psecs = bfd_malloc (symcount * sizeof (*psecs));
- if (psecs == NULL)
- return false;
- sec_arr[bfd_idx] = psecs;
- for (psy = psyms, p = psecs, sy = syms; sy < syms + symcount; ++p, ++sy)
- if (ELF_ST_TYPE (sy->st_info) == STT_NOTYPE
- || ELF_ST_TYPE (sy->st_info) == STT_FUNC)
- {
- asection *s;
- *p = s = bfd_section_from_elf_index (ibfd, sy->st_shndx);
- if (s != NULL && interesting_section (s))
- *psy++ = sy;
- }
- symcount = psy - psyms;
- *psy = NULL;
- /* Sort them by section and offset within section. */
- sort_syms_syms = syms;
- sort_syms_psecs = psecs;
- qsort (psyms, symcount, sizeof (*psyms), sort_syms);
- /* Now inspect the function symbols. */
- for (psy = psyms; psy < psyms + symcount; )
- {
- asection *s = psecs[*psy - syms];
- Elf_Internal_Sym **psy2;
- for (psy2 = psy; ++psy2 < psyms + symcount; )
- if (psecs[*psy2 - syms] != s)
- break;
- if (!alloc_stack_info (s, psy2 - psy))
- return false;
- psy = psy2;
- }
- /* First install info about properly typed and sized functions.
- In an ideal world this will cover all code sections, except
- when partitioning functions into hot and cold sections,
- and the horrible pasted together .init and .fini functions. */
- for (psy = psyms; psy < psyms + symcount; ++psy)
- {
- sy = *psy;
- if (ELF_ST_TYPE (sy->st_info) == STT_FUNC)
- {
- asection *s = psecs[sy - syms];
- if (!maybe_insert_function (s, sy, false, true))
- return false;
- }
- }
- for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
- if (interesting_section (sec))
- gaps |= check_function_ranges (sec, info);
- }
- if (gaps)
- {
- /* See if we can discover more function symbols by looking at
- relocations. */
- for (ibfd = info->input_bfds, bfd_idx = 0;
- ibfd != NULL;
- ibfd = ibfd->link.next, bfd_idx++)
- {
- asection *sec;
- if (psym_arr[bfd_idx] == NULL)
- continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (!mark_functions_via_relocs (sec, info, false))
- return false;
- }
- for (ibfd = info->input_bfds, bfd_idx = 0;
- ibfd != NULL;
- ibfd = ibfd->link.next, bfd_idx++)
- {
- Elf_Internal_Shdr *symtab_hdr;
- asection *sec;
- Elf_Internal_Sym *syms, *sy, **psyms, **psy;
- asection **psecs;
- if ((psyms = psym_arr[bfd_idx]) == NULL)
- continue;
- psecs = sec_arr[bfd_idx];
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- syms = (Elf_Internal_Sym *) symtab_hdr->contents;
- gaps = false;
- for (sec = ibfd->sections; sec != NULL && !gaps; sec = sec->next)
- if (interesting_section (sec))
- gaps |= check_function_ranges (sec, info);
- if (!gaps)
- continue;
- /* Finally, install all globals. */
- for (psy = psyms; (sy = *psy) != NULL; ++psy)
- {
- asection *s;
- s = psecs[sy - syms];
- /* Global syms might be improperly typed functions. */
- if (ELF_ST_TYPE (sy->st_info) != STT_FUNC
- && ELF_ST_BIND (sy->st_info) == STB_GLOBAL)
- {
- if (!maybe_insert_function (s, sy, false, false))
- return false;
- }
- }
- }
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- asection *sec;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- /* Some of the symbols we've installed as marking the
- beginning of functions may have a size of zero. Extend
- the range of such functions to the beginning of the
- next symbol of interest. */
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (interesting_section (sec))
- {
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- sec_data = spu_elf_section_data (sec);
- sinfo = sec_data->u.i.stack_info;
- if (sinfo != NULL && sinfo->num_fun != 0)
- {
- int fun_idx;
- bfd_vma hi = sec->size;
- for (fun_idx = sinfo->num_fun; --fun_idx >= 0; )
- {
- sinfo->fun[fun_idx].hi = hi;
- hi = sinfo->fun[fun_idx].lo;
- }
- sinfo->fun[0].lo = 0;
- }
- /* No symbols in this section. Must be .init or .fini
- or something similar. */
- else if (!pasted_function (sec))
- return false;
- }
- }
- }
- for (ibfd = info->input_bfds, bfd_idx = 0;
- ibfd != NULL;
- ibfd = ibfd->link.next, bfd_idx++)
- {
- if (psym_arr[bfd_idx] == NULL)
- continue;
- free (psym_arr[bfd_idx]);
- free (sec_arr[bfd_idx]);
- }
- free (psym_arr);
- free (sec_arr);
- return true;
- }
- /* Iterate over all function_info we have collected, calling DOIT on
- each node if ROOT_ONLY is false. Only call DOIT on root nodes
- if ROOT_ONLY. */
- static bool
- for_each_node (bool (*doit) (struct function_info *,
- struct bfd_link_info *,
- void *),
- struct bfd_link_info *info,
- void *param,
- int root_only)
- {
- bfd *ibfd;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- asection *sec;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- {
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- if ((sec_data = spu_elf_section_data (sec)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int i;
- for (i = 0; i < sinfo->num_fun; ++i)
- if (!root_only || !sinfo->fun[i].non_root)
- if (!doit (&sinfo->fun[i], info, param))
- return false;
- }
- }
- }
- return true;
- }
- /* Transfer call info attached to struct function_info entries for
- all of a given function's sections to the first entry. */
- static bool
- transfer_calls (struct function_info *fun,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- void *param ATTRIBUTE_UNUSED)
- {
- struct function_info *start = fun->start;
- if (start != NULL)
- {
- struct call_info *call, *call_next;
- while (start->start != NULL)
- start = start->start;
- for (call = fun->call_list; call != NULL; call = call_next)
- {
- call_next = call->next;
- if (!insert_callee (start, call))
- free (call);
- }
- fun->call_list = NULL;
- }
- return true;
- }
- /* Mark nodes in the call graph that are called by some other node. */
- static bool
- mark_non_root (struct function_info *fun,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- void *param ATTRIBUTE_UNUSED)
- {
- struct call_info *call;
- if (fun->visit1)
- return true;
- fun->visit1 = true;
- for (call = fun->call_list; call; call = call->next)
- {
- call->fun->non_root = true;
- mark_non_root (call->fun, 0, 0);
- }
- return true;
- }
- /* Remove cycles from the call graph. Set depth of nodes. */
- static bool
- remove_cycles (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct call_info **callp, *call;
- unsigned int depth = *(unsigned int *) param;
- unsigned int max_depth = depth;
- fun->depth = depth;
- fun->visit2 = true;
- fun->marking = true;
- callp = &fun->call_list;
- while ((call = *callp) != NULL)
- {
- call->max_depth = depth + !call->is_pasted;
- if (!call->fun->visit2)
- {
- if (!remove_cycles (call->fun, info, &call->max_depth))
- return false;
- if (max_depth < call->max_depth)
- max_depth = call->max_depth;
- }
- else if (call->fun->marking)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- if (!htab->params->auto_overlay
- && htab->params->stack_analysis)
- {
- const char *f1 = func_name (fun);
- const char *f2 = func_name (call->fun);
- /* xgettext:c-format */
- info->callbacks->info (_("stack analysis will ignore the call "
- "from %s to %s\n"),
- f1, f2);
- }
- call->broken_cycle = true;
- }
- callp = &call->next;
- }
- fun->marking = false;
- *(unsigned int *) param = max_depth;
- return true;
- }
- /* Check that we actually visited all nodes in remove_cycles. If we
- didn't, then there is some cycle in the call graph not attached to
- any root node. Arbitrarily choose a node in the cycle as a new
- root and break the cycle. */
- static bool
- mark_detached_root (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- if (fun->visit2)
- return true;
- fun->non_root = false;
- *(unsigned int *) param = 0;
- return remove_cycles (fun, info, param);
- }
- /* Populate call_list for each function. */
- static bool
- build_call_tree (struct bfd_link_info *info)
- {
- bfd *ibfd;
- unsigned int depth;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- asection *sec;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (!mark_functions_via_relocs (sec, info, true))
- return false;
- }
- /* Transfer call info from hot/cold section part of function
- to main entry. */
- if (!spu_hash_table (info)->params->auto_overlay
- && !for_each_node (transfer_calls, info, 0, false))
- return false;
- /* Find the call graph root(s). */
- if (!for_each_node (mark_non_root, info, 0, false))
- return false;
- /* Remove cycles from the call graph. We start from the root node(s)
- so that we break cycles in a reasonable place. */
- depth = 0;
- if (!for_each_node (remove_cycles, info, &depth, true))
- return false;
- return for_each_node (mark_detached_root, info, &depth, false);
- }
- /* qsort predicate to sort calls by priority, max_depth then count. */
- static int
- sort_calls (const void *a, const void *b)
- {
- struct call_info *const *c1 = a;
- struct call_info *const *c2 = b;
- int delta;
- delta = (*c2)->priority - (*c1)->priority;
- if (delta != 0)
- return delta;
- delta = (*c2)->max_depth - (*c1)->max_depth;
- if (delta != 0)
- return delta;
- delta = (*c2)->count - (*c1)->count;
- if (delta != 0)
- return delta;
- return (char *) c1 - (char *) c2;
- }
- struct _mos_param {
- unsigned int max_overlay_size;
- };
- /* Set linker_mark and gc_mark on any sections that we will put in
- overlays. These flags are used by the generic ELF linker, but we
- won't be continuing on to bfd_elf_final_link so it is OK to use
- them. linker_mark is clear before we get here. Set segment_mark
- on sections that are part of a pasted function (excluding the last
- section).
- Set up function rodata section if --overlay-rodata. We don't
- currently include merged string constant rodata sections since
- Sort the call graph so that the deepest nodes will be visited
- first. */
- static bool
- mark_overlay_section (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct call_info *call;
- unsigned int count;
- struct _mos_param *mos_param = param;
- struct spu_link_hash_table *htab = spu_hash_table (info);
- if (fun->visit4)
- return true;
- fun->visit4 = true;
- if (!fun->sec->linker_mark
- && (htab->params->ovly_flavour != ovly_soft_icache
- || htab->params->non_ia_text
- || startswith (fun->sec->name, ".text.ia.")
- || strcmp (fun->sec->name, ".init") == 0
- || strcmp (fun->sec->name, ".fini") == 0))
- {
- unsigned int size;
- fun->sec->linker_mark = 1;
- fun->sec->gc_mark = 1;
- fun->sec->segment_mark = 0;
- /* Ensure SEC_CODE is set on this text section (it ought to
- be!), and SEC_CODE is clear on rodata sections. We use
- this flag to differentiate the two overlay section types. */
- fun->sec->flags |= SEC_CODE;
- size = fun->sec->size;
- if (htab->params->auto_overlay & OVERLAY_RODATA)
- {
- char *name = NULL;
- /* Find the rodata section corresponding to this function's
- text section. */
- if (strcmp (fun->sec->name, ".text") == 0)
- {
- name = bfd_malloc (sizeof (".rodata"));
- if (name == NULL)
- return false;
- memcpy (name, ".rodata", sizeof (".rodata"));
- }
- else if (startswith (fun->sec->name, ".text."))
- {
- size_t len = strlen (fun->sec->name);
- name = bfd_malloc (len + 3);
- if (name == NULL)
- return false;
- memcpy (name, ".rodata", sizeof (".rodata"));
- memcpy (name + 7, fun->sec->name + 5, len - 4);
- }
- else if (startswith (fun->sec->name, ".gnu.linkonce.t."))
- {
- size_t len = strlen (fun->sec->name) + 1;
- name = bfd_malloc (len);
- if (name == NULL)
- return false;
- memcpy (name, fun->sec->name, len);
- name[14] = 'r';
- }
- if (name != NULL)
- {
- asection *rodata = NULL;
- asection *group_sec = elf_section_data (fun->sec)->next_in_group;
- if (group_sec == NULL)
- rodata = bfd_get_section_by_name (fun->sec->owner, name);
- else
- while (group_sec != NULL && group_sec != fun->sec)
- {
- if (strcmp (group_sec->name, name) == 0)
- {
- rodata = group_sec;
- break;
- }
- group_sec = elf_section_data (group_sec)->next_in_group;
- }
- fun->rodata = rodata;
- if (fun->rodata)
- {
- size += fun->rodata->size;
- if (htab->params->line_size != 0
- && size > htab->params->line_size)
- {
- size -= fun->rodata->size;
- fun->rodata = NULL;
- }
- else
- {
- fun->rodata->linker_mark = 1;
- fun->rodata->gc_mark = 1;
- fun->rodata->flags &= ~SEC_CODE;
- }
- }
- free (name);
- }
- }
- if (mos_param->max_overlay_size < size)
- mos_param->max_overlay_size = size;
- }
- for (count = 0, call = fun->call_list; call != NULL; call = call->next)
- count += 1;
- if (count > 1)
- {
- struct call_info **calls = bfd_malloc (count * sizeof (*calls));
- if (calls == NULL)
- return false;
- for (count = 0, call = fun->call_list; call != NULL; call = call->next)
- calls[count++] = call;
- qsort (calls, count, sizeof (*calls), sort_calls);
- fun->call_list = NULL;
- while (count != 0)
- {
- --count;
- calls[count]->next = fun->call_list;
- fun->call_list = calls[count];
- }
- free (calls);
- }
- for (call = fun->call_list; call != NULL; call = call->next)
- {
- if (call->is_pasted)
- {
- /* There can only be one is_pasted call per function_info. */
- BFD_ASSERT (!fun->sec->segment_mark);
- fun->sec->segment_mark = 1;
- }
- if (!call->broken_cycle
- && !mark_overlay_section (call->fun, info, param))
- return false;
- }
- /* Don't put entry code into an overlay. The overlay manager needs
- a stack! Also, don't mark .ovl.init as an overlay. */
- if (fun->lo + fun->sec->output_offset + fun->sec->output_section->vma
- == info->output_bfd->start_address
- || startswith (fun->sec->output_section->name, ".ovl.init"))
- {
- fun->sec->linker_mark = 0;
- if (fun->rodata != NULL)
- fun->rodata->linker_mark = 0;
- }
- return true;
- }
- /* If non-zero then unmark functions called from those within sections
- that we need to unmark. Unfortunately this isn't reliable since the
- call graph cannot know the destination of function pointer calls. */
- #define RECURSE_UNMARK 0
- struct _uos_param {
- asection *exclude_input_section;
- asection *exclude_output_section;
- unsigned long clearing;
- };
- /* Undo some of mark_overlay_section's work. */
- static bool
- unmark_overlay_section (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct call_info *call;
- struct _uos_param *uos_param = param;
- unsigned int excluded = 0;
- if (fun->visit5)
- return true;
- fun->visit5 = true;
- excluded = 0;
- if (fun->sec == uos_param->exclude_input_section
- || fun->sec->output_section == uos_param->exclude_output_section)
- excluded = 1;
- if (RECURSE_UNMARK)
- uos_param->clearing += excluded;
- if (RECURSE_UNMARK ? uos_param->clearing : excluded)
- {
- fun->sec->linker_mark = 0;
- if (fun->rodata)
- fun->rodata->linker_mark = 0;
- }
- for (call = fun->call_list; call != NULL; call = call->next)
- if (!call->broken_cycle
- && !unmark_overlay_section (call->fun, info, param))
- return false;
- if (RECURSE_UNMARK)
- uos_param->clearing -= excluded;
- return true;
- }
- struct _cl_param {
- unsigned int lib_size;
- asection **lib_sections;
- };
- /* Add sections we have marked as belonging to overlays to an array
- for consideration as non-overlay sections. The array consist of
- pairs of sections, (text,rodata), for functions in the call graph. */
- static bool
- collect_lib_sections (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct _cl_param *lib_param = param;
- struct call_info *call;
- unsigned int size;
- if (fun->visit6)
- return true;
- fun->visit6 = true;
- if (!fun->sec->linker_mark || !fun->sec->gc_mark || fun->sec->segment_mark)
- return true;
- size = fun->sec->size;
- if (fun->rodata)
- size += fun->rodata->size;
- if (size <= lib_param->lib_size)
- {
- *lib_param->lib_sections++ = fun->sec;
- fun->sec->gc_mark = 0;
- if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
- {
- *lib_param->lib_sections++ = fun->rodata;
- fun->rodata->gc_mark = 0;
- }
- else
- *lib_param->lib_sections++ = NULL;
- }
- for (call = fun->call_list; call != NULL; call = call->next)
- if (!call->broken_cycle)
- collect_lib_sections (call->fun, info, param);
- return true;
- }
- /* qsort predicate to sort sections by call count. */
- static int
- sort_lib (const void *a, const void *b)
- {
- asection *const *s1 = a;
- asection *const *s2 = b;
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- int delta;
- delta = 0;
- if ((sec_data = spu_elf_section_data (*s1)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int i;
- for (i = 0; i < sinfo->num_fun; ++i)
- delta -= sinfo->fun[i].call_count;
- }
- if ((sec_data = spu_elf_section_data (*s2)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int i;
- for (i = 0; i < sinfo->num_fun; ++i)
- delta += sinfo->fun[i].call_count;
- }
- if (delta != 0)
- return delta;
- return s1 - s2;
- }
- /* Remove some sections from those marked to be in overlays. Choose
- those that are called from many places, likely library functions. */
- static unsigned int
- auto_ovl_lib_functions (struct bfd_link_info *info, unsigned int lib_size)
- {
- bfd *ibfd;
- asection **lib_sections;
- unsigned int i, lib_count;
- struct _cl_param collect_lib_param;
- struct function_info dummy_caller;
- struct spu_link_hash_table *htab;
- memset (&dummy_caller, 0, sizeof (dummy_caller));
- lib_count = 0;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- asection *sec;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (sec->linker_mark
- && sec->size < lib_size
- && (sec->flags & SEC_CODE) != 0)
- lib_count += 1;
- }
- lib_sections = bfd_malloc (lib_count * 2 * sizeof (*lib_sections));
- if (lib_sections == NULL)
- return (unsigned int) -1;
- collect_lib_param.lib_size = lib_size;
- collect_lib_param.lib_sections = lib_sections;
- if (!for_each_node (collect_lib_sections, info, &collect_lib_param,
- true))
- return (unsigned int) -1;
- lib_count = (collect_lib_param.lib_sections - lib_sections) / 2;
- /* Sort sections so that those with the most calls are first. */
- if (lib_count > 1)
- qsort (lib_sections, lib_count, 2 * sizeof (*lib_sections), sort_lib);
- htab = spu_hash_table (info);
- for (i = 0; i < lib_count; i++)
- {
- unsigned int tmp, stub_size;
- asection *sec;
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- sec = lib_sections[2 * i];
- /* If this section is OK, its size must be less than lib_size. */
- tmp = sec->size;
- /* If it has a rodata section, then add that too. */
- if (lib_sections[2 * i + 1])
- tmp += lib_sections[2 * i + 1]->size;
- /* Add any new overlay call stubs needed by the section. */
- stub_size = 0;
- if (tmp < lib_size
- && (sec_data = spu_elf_section_data (sec)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int k;
- struct call_info *call;
- for (k = 0; k < sinfo->num_fun; ++k)
- for (call = sinfo->fun[k].call_list; call; call = call->next)
- if (call->fun->sec->linker_mark)
- {
- struct call_info *p;
- for (p = dummy_caller.call_list; p; p = p->next)
- if (p->fun == call->fun)
- break;
- if (!p)
- stub_size += ovl_stub_size (htab->params);
- }
- }
- if (tmp + stub_size < lib_size)
- {
- struct call_info **pp, *p;
- /* This section fits. Mark it as non-overlay. */
- lib_sections[2 * i]->linker_mark = 0;
- if (lib_sections[2 * i + 1])
- lib_sections[2 * i + 1]->linker_mark = 0;
- lib_size -= tmp + stub_size;
- /* Call stubs to the section we just added are no longer
- needed. */
- pp = &dummy_caller.call_list;
- while ((p = *pp) != NULL)
- if (!p->fun->sec->linker_mark)
- {
- lib_size += ovl_stub_size (htab->params);
- *pp = p->next;
- free (p);
- }
- else
- pp = &p->next;
- /* Add new call stubs to dummy_caller. */
- if ((sec_data = spu_elf_section_data (sec)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int k;
- struct call_info *call;
- for (k = 0; k < sinfo->num_fun; ++k)
- for (call = sinfo->fun[k].call_list;
- call;
- call = call->next)
- if (call->fun->sec->linker_mark)
- {
- struct call_info *callee;
- callee = bfd_malloc (sizeof (*callee));
- if (callee == NULL)
- return (unsigned int) -1;
- *callee = *call;
- if (!insert_callee (&dummy_caller, callee))
- free (callee);
- }
- }
- }
- }
- while (dummy_caller.call_list != NULL)
- {
- struct call_info *call = dummy_caller.call_list;
- dummy_caller.call_list = call->next;
- free (call);
- }
- for (i = 0; i < 2 * lib_count; i++)
- if (lib_sections[i])
- lib_sections[i]->gc_mark = 1;
- free (lib_sections);
- return lib_size;
- }
- /* Build an array of overlay sections. The deepest node's section is
- added first, then its parent node's section, then everything called
- from the parent section. The idea being to group sections to
- minimise calls between different overlays. */
- static bool
- collect_overlays (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct call_info *call;
- bool added_fun;
- asection ***ovly_sections = param;
- if (fun->visit7)
- return true;
- fun->visit7 = true;
- for (call = fun->call_list; call != NULL; call = call->next)
- if (!call->is_pasted && !call->broken_cycle)
- {
- if (!collect_overlays (call->fun, info, ovly_sections))
- return false;
- break;
- }
- added_fun = false;
- if (fun->sec->linker_mark && fun->sec->gc_mark)
- {
- fun->sec->gc_mark = 0;
- *(*ovly_sections)++ = fun->sec;
- if (fun->rodata && fun->rodata->linker_mark && fun->rodata->gc_mark)
- {
- fun->rodata->gc_mark = 0;
- *(*ovly_sections)++ = fun->rodata;
- }
- else
- *(*ovly_sections)++ = NULL;
- added_fun = true;
- /* Pasted sections must stay with the first section. We don't
- put pasted sections in the array, just the first section.
- Mark subsequent sections as already considered. */
- if (fun->sec->segment_mark)
- {
- struct function_info *call_fun = fun;
- do
- {
- for (call = call_fun->call_list; call != NULL; call = call->next)
- if (call->is_pasted)
- {
- call_fun = call->fun;
- call_fun->sec->gc_mark = 0;
- if (call_fun->rodata)
- call_fun->rodata->gc_mark = 0;
- break;
- }
- if (call == NULL)
- abort ();
- }
- while (call_fun->sec->segment_mark);
- }
- }
- for (call = fun->call_list; call != NULL; call = call->next)
- if (!call->broken_cycle
- && !collect_overlays (call->fun, info, ovly_sections))
- return false;
- if (added_fun)
- {
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- if ((sec_data = spu_elf_section_data (fun->sec)) != NULL
- && (sinfo = sec_data->u.i.stack_info) != NULL)
- {
- int i;
- for (i = 0; i < sinfo->num_fun; ++i)
- if (!collect_overlays (&sinfo->fun[i], info, ovly_sections))
- return false;
- }
- }
- return true;
- }
- struct _sum_stack_param {
- size_t cum_stack;
- size_t overall_stack;
- bool emit_stack_syms;
- };
- /* Descend the call graph for FUN, accumulating total stack required. */
- static bool
- sum_stack (struct function_info *fun,
- struct bfd_link_info *info,
- void *param)
- {
- struct call_info *call;
- struct function_info *max;
- size_t stack, cum_stack;
- const char *f1;
- bool has_call;
- struct _sum_stack_param *sum_stack_param = param;
- struct spu_link_hash_table *htab;
- cum_stack = fun->stack;
- sum_stack_param->cum_stack = cum_stack;
- if (fun->visit3)
- return true;
- has_call = false;
- max = NULL;
- for (call = fun->call_list; call; call = call->next)
- {
- if (call->broken_cycle)
- continue;
- if (!call->is_pasted)
- has_call = true;
- if (!sum_stack (call->fun, info, sum_stack_param))
- return false;
- stack = sum_stack_param->cum_stack;
- /* Include caller stack for normal calls, don't do so for
- tail calls. fun->stack here is local stack usage for
- this function. */
- if (!call->is_tail || call->is_pasted || call->fun->start != NULL)
- stack += fun->stack;
- if (cum_stack < stack)
- {
- cum_stack = stack;
- max = call->fun;
- }
- }
- sum_stack_param->cum_stack = cum_stack;
- stack = fun->stack;
- /* Now fun->stack holds cumulative stack. */
- fun->stack = cum_stack;
- fun->visit3 = true;
- if (!fun->non_root
- && sum_stack_param->overall_stack < cum_stack)
- sum_stack_param->overall_stack = cum_stack;
- htab = spu_hash_table (info);
- if (htab->params->auto_overlay)
- return true;
- f1 = func_name (fun);
- if (htab->params->stack_analysis)
- {
- if (!fun->non_root)
- info->callbacks->info (" %s: 0x%v\n", f1, (bfd_vma) cum_stack);
- info->callbacks->minfo ("%s: 0x%v 0x%v\n",
- f1, (bfd_vma) stack, (bfd_vma) cum_stack);
- if (has_call)
- {
- info->callbacks->minfo (_(" calls:\n"));
- for (call = fun->call_list; call; call = call->next)
- if (!call->is_pasted && !call->broken_cycle)
- {
- const char *f2 = func_name (call->fun);
- const char *ann1 = call->fun == max ? "*" : " ";
- const char *ann2 = call->is_tail ? "t" : " ";
- info->callbacks->minfo (" %s%s %s\n", ann1, ann2, f2);
- }
- }
- }
- if (sum_stack_param->emit_stack_syms)
- {
- char *name = bfd_malloc (18 + strlen (f1));
- struct elf_link_hash_entry *h;
- if (name == NULL)
- return false;
- if (fun->global || ELF_ST_BIND (fun->u.sym->st_info) == STB_GLOBAL)
- sprintf (name, "__stack_%s", f1);
- else
- sprintf (name, "__stack_%x_%s", fun->sec->id & 0xffffffff, f1);
- h = elf_link_hash_lookup (&htab->elf, name, true, true, false);
- free (name);
- if (h != NULL
- && (h->root.type == bfd_link_hash_new
- || h->root.type == bfd_link_hash_undefined
- || h->root.type == bfd_link_hash_undefweak))
- {
- h->root.type = bfd_link_hash_defined;
- h->root.u.def.section = bfd_abs_section_ptr;
- h->root.u.def.value = cum_stack;
- h->size = 0;
- h->type = 0;
- h->ref_regular = 1;
- h->def_regular = 1;
- h->ref_regular_nonweak = 1;
- h->forced_local = 1;
- h->non_elf = 0;
- }
- }
- return true;
- }
- /* SEC is part of a pasted function. Return the call_info for the
- next section of this function. */
- static struct call_info *
- find_pasted_call (asection *sec)
- {
- struct _spu_elf_section_data *sec_data = spu_elf_section_data (sec);
- struct spu_elf_stack_info *sinfo = sec_data->u.i.stack_info;
- struct call_info *call;
- int k;
- for (k = 0; k < sinfo->num_fun; ++k)
- for (call = sinfo->fun[k].call_list; call != NULL; call = call->next)
- if (call->is_pasted)
- return call;
- abort ();
- return 0;
- }
- /* qsort predicate to sort bfds by file name. */
- static int
- sort_bfds (const void *a, const void *b)
- {
- bfd *const *abfd1 = a;
- bfd *const *abfd2 = b;
- return filename_cmp (bfd_get_filename (*abfd1), bfd_get_filename (*abfd2));
- }
- static unsigned int
- print_one_overlay_section (FILE *script,
- unsigned int base,
- unsigned int count,
- unsigned int ovlynum,
- unsigned int *ovly_map,
- asection **ovly_sections,
- struct bfd_link_info *info)
- {
- unsigned int j;
- for (j = base; j < count && ovly_map[j] == ovlynum; j++)
- {
- asection *sec = ovly_sections[2 * j];
- if (fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? bfd_get_filename (sec->owner->my_archive) : ""),
- info->path_separator,
- bfd_get_filename (sec->owner),
- sec->name) <= 0)
- return -1;
- if (sec->segment_mark)
- {
- struct call_info *call = find_pasted_call (sec);
- while (call != NULL)
- {
- struct function_info *call_fun = call->fun;
- sec = call_fun->sec;
- if (fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? bfd_get_filename (sec->owner->my_archive) : ""),
- info->path_separator,
- bfd_get_filename (sec->owner),
- sec->name) <= 0)
- return -1;
- for (call = call_fun->call_list; call; call = call->next)
- if (call->is_pasted)
- break;
- }
- }
- }
- for (j = base; j < count && ovly_map[j] == ovlynum; j++)
- {
- asection *sec = ovly_sections[2 * j + 1];
- if (sec != NULL
- && fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? bfd_get_filename (sec->owner->my_archive) : ""),
- info->path_separator,
- bfd_get_filename (sec->owner),
- sec->name) <= 0)
- return -1;
- sec = ovly_sections[2 * j];
- if (sec->segment_mark)
- {
- struct call_info *call = find_pasted_call (sec);
- while (call != NULL)
- {
- struct function_info *call_fun = call->fun;
- sec = call_fun->rodata;
- if (sec != NULL
- && fprintf (script, " %s%c%s (%s)\n",
- (sec->owner->my_archive != NULL
- ? bfd_get_filename (sec->owner->my_archive) : ""),
- info->path_separator,
- bfd_get_filename (sec->owner),
- sec->name) <= 0)
- return -1;
- for (call = call_fun->call_list; call; call = call->next)
- if (call->is_pasted)
- break;
- }
- }
- }
- return j;
- }
- /* Handle --auto-overlay. */
- static void
- spu_elf_auto_overlay (struct bfd_link_info *info)
- {
- bfd *ibfd;
- bfd **bfd_arr;
- struct elf_segment_map *m;
- unsigned int fixed_size, lo, hi;
- unsigned int reserved;
- struct spu_link_hash_table *htab;
- unsigned int base, i, count, bfd_count;
- unsigned int region, ovlynum;
- asection **ovly_sections, **ovly_p;
- unsigned int *ovly_map;
- FILE *script;
- unsigned int total_overlay_size, overlay_size;
- const char *ovly_mgr_entry;
- struct elf_link_hash_entry *h;
- struct _mos_param mos_param;
- struct _uos_param uos_param;
- struct function_info dummy_caller;
- /* Find the extents of our loadable image. */
- lo = (unsigned int) -1;
- hi = 0;
- for (m = elf_seg_map (info->output_bfd); m != NULL; m = m->next)
- if (m->p_type == PT_LOAD)
- for (i = 0; i < m->count; i++)
- if (m->sections[i]->size != 0)
- {
- if (m->sections[i]->vma < lo)
- lo = m->sections[i]->vma;
- if (m->sections[i]->vma + m->sections[i]->size - 1 > hi)
- hi = m->sections[i]->vma + m->sections[i]->size - 1;
- }
- fixed_size = hi + 1 - lo;
- if (!discover_functions (info))
- goto err_exit;
- if (!build_call_tree (info))
- goto err_exit;
- htab = spu_hash_table (info);
- reserved = htab->params->auto_overlay_reserved;
- if (reserved == 0)
- {
- struct _sum_stack_param sum_stack_param;
- sum_stack_param.emit_stack_syms = 0;
- sum_stack_param.overall_stack = 0;
- if (!for_each_node (sum_stack, info, &sum_stack_param, true))
- goto err_exit;
- reserved = (sum_stack_param.overall_stack
- + htab->params->extra_stack_space);
- }
- /* No need for overlays if everything already fits. */
- if (fixed_size + reserved <= htab->local_store
- && htab->params->ovly_flavour != ovly_soft_icache)
- {
- htab->params->auto_overlay = 0;
- return;
- }
- uos_param.exclude_input_section = 0;
- uos_param.exclude_output_section
- = bfd_get_section_by_name (info->output_bfd, ".interrupt");
- ovly_mgr_entry = "__ovly_load";
- if (htab->params->ovly_flavour == ovly_soft_icache)
- ovly_mgr_entry = "__icache_br_handler";
- h = elf_link_hash_lookup (&htab->elf, ovly_mgr_entry,
- false, false, false);
- if (h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->def_regular)
- {
- /* We have a user supplied overlay manager. */
- uos_param.exclude_input_section = h->root.u.def.section;
- }
- else
- {
- /* If no user overlay manager, spu_elf_load_ovl_mgr will add our
- builtin version to .text, and will adjust .text size. */
- fixed_size += (*htab->params->spu_elf_load_ovl_mgr) ();
- }
- /* Mark overlay sections, and find max overlay section size. */
- mos_param.max_overlay_size = 0;
- if (!for_each_node (mark_overlay_section, info, &mos_param, true))
- goto err_exit;
- /* We can't put the overlay manager or interrupt routines in
- overlays. */
- uos_param.clearing = 0;
- if ((uos_param.exclude_input_section
- || uos_param.exclude_output_section)
- && !for_each_node (unmark_overlay_section, info, &uos_param, true))
- goto err_exit;
- bfd_count = 0;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- ++bfd_count;
- bfd_arr = bfd_malloc (bfd_count * sizeof (*bfd_arr));
- if (bfd_arr == NULL)
- goto err_exit;
- /* Count overlay sections, and subtract their sizes from "fixed_size". */
- count = 0;
- bfd_count = 0;
- total_overlay_size = 0;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- extern const bfd_target spu_elf32_vec;
- asection *sec;
- unsigned int old_count;
- if (ibfd->xvec != &spu_elf32_vec)
- continue;
- old_count = count;
- for (sec = ibfd->sections; sec != NULL; sec = sec->next)
- if (sec->linker_mark)
- {
- if ((sec->flags & SEC_CODE) != 0)
- count += 1;
- fixed_size -= sec->size;
- total_overlay_size += sec->size;
- }
- else if ((sec->flags & (SEC_ALLOC | SEC_LOAD)) == (SEC_ALLOC | SEC_LOAD)
- && sec->output_section->owner == info->output_bfd
- && startswith (sec->output_section->name, ".ovl.init"))
- fixed_size -= sec->size;
- if (count != old_count)
- bfd_arr[bfd_count++] = ibfd;
- }
- /* Since the overlay link script selects sections by file name and
- section name, ensure that file names are unique. */
- if (bfd_count > 1)
- {
- bool ok = true;
- qsort (bfd_arr, bfd_count, sizeof (*bfd_arr), sort_bfds);
- for (i = 1; i < bfd_count; ++i)
- if (filename_cmp (bfd_get_filename (bfd_arr[i - 1]),
- bfd_get_filename (bfd_arr[i])) == 0)
- {
- if (bfd_arr[i - 1]->my_archive == bfd_arr[i]->my_archive)
- {
- if (bfd_arr[i - 1]->my_archive && bfd_arr[i]->my_archive)
- /* xgettext:c-format */
- info->callbacks->einfo (_("%s duplicated in %s\n"),
- bfd_get_filename (bfd_arr[i]),
- bfd_get_filename (bfd_arr[i]->my_archive));
- else
- info->callbacks->einfo (_("%s duplicated\n"),
- bfd_get_filename (bfd_arr[i]));
- ok = false;
- }
- }
- if (!ok)
- {
- info->callbacks->einfo (_("sorry, no support for duplicate "
- "object files in auto-overlay script\n"));
- bfd_set_error (bfd_error_bad_value);
- goto err_exit;
- }
- }
- free (bfd_arr);
- fixed_size += reserved;
- fixed_size += htab->non_ovly_stub * ovl_stub_size (htab->params);
- if (fixed_size + mos_param.max_overlay_size <= htab->local_store)
- {
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- /* Stubs in the non-icache area are bigger. */
- fixed_size += htab->non_ovly_stub * 16;
- /* Space for icache manager tables.
- a) Tag array, one quadword per cache line.
- - word 0: ia address of present line, init to zero. */
- fixed_size += 16 << htab->num_lines_log2;
- /* b) Rewrite "to" list, one quadword per cache line. */
- fixed_size += 16 << htab->num_lines_log2;
- /* c) Rewrite "from" list, one byte per outgoing branch (rounded up
- to a power-of-two number of full quadwords) per cache line. */
- fixed_size += 16 << (htab->fromelem_size_log2
- + htab->num_lines_log2);
- /* d) Pointer to __ea backing store (toe), 1 quadword. */
- fixed_size += 16;
- }
- else
- {
- /* Guess number of overlays. Assuming overlay buffer is on
- average only half full should be conservative. */
- ovlynum = (total_overlay_size * 2 * htab->params->num_lines
- / (htab->local_store - fixed_size));
- /* Space for _ovly_table[], _ovly_buf_table[] and toe. */
- fixed_size += ovlynum * 16 + 16 + 4 + 16;
- }
- }
- if (fixed_size + mos_param.max_overlay_size > htab->local_store)
- /* xgettext:c-format */
- info->callbacks->einfo (_("non-overlay size of 0x%v plus maximum overlay "
- "size of 0x%v exceeds local store\n"),
- (bfd_vma) fixed_size,
- (bfd_vma) mos_param.max_overlay_size);
- /* Now see if we should put some functions in the non-overlay area. */
- else if (fixed_size < htab->params->auto_overlay_fixed)
- {
- unsigned int max_fixed, lib_size;
- max_fixed = htab->local_store - mos_param.max_overlay_size;
- if (max_fixed > htab->params->auto_overlay_fixed)
- max_fixed = htab->params->auto_overlay_fixed;
- lib_size = max_fixed - fixed_size;
- lib_size = auto_ovl_lib_functions (info, lib_size);
- if (lib_size == (unsigned int) -1)
- goto err_exit;
- fixed_size = max_fixed - lib_size;
- }
- /* Build an array of sections, suitably sorted to place into
- overlays. */
- ovly_sections = bfd_malloc (2 * count * sizeof (*ovly_sections));
- if (ovly_sections == NULL)
- goto err_exit;
- ovly_p = ovly_sections;
- if (!for_each_node (collect_overlays, info, &ovly_p, true))
- goto err_exit;
- count = (size_t) (ovly_p - ovly_sections) / 2;
- ovly_map = bfd_malloc (count * sizeof (*ovly_map));
- if (ovly_map == NULL)
- goto err_exit;
- memset (&dummy_caller, 0, sizeof (dummy_caller));
- overlay_size = (htab->local_store - fixed_size) / htab->params->num_lines;
- if (htab->params->line_size != 0)
- overlay_size = htab->params->line_size;
- base = 0;
- ovlynum = 0;
- while (base < count)
- {
- unsigned int size = 0, rosize = 0, roalign = 0;
- for (i = base; i < count; i++)
- {
- asection *sec, *rosec;
- unsigned int tmp, rotmp;
- unsigned int num_stubs;
- struct call_info *call, *pasty;
- struct _spu_elf_section_data *sec_data;
- struct spu_elf_stack_info *sinfo;
- unsigned int k;
- /* See whether we can add this section to the current
- overlay without overflowing our overlay buffer. */
- sec = ovly_sections[2 * i];
- tmp = align_power (size, sec->alignment_power) + sec->size;
- rotmp = rosize;
- rosec = ovly_sections[2 * i + 1];
- if (rosec != NULL)
- {
- rotmp = align_power (rotmp, rosec->alignment_power) + rosec->size;
- if (roalign < rosec->alignment_power)
- roalign = rosec->alignment_power;
- }
- if (align_power (tmp, roalign) + rotmp > overlay_size)
- break;
- if (sec->segment_mark)
- {
- /* Pasted sections must stay together, so add their
- sizes too. */
- pasty = find_pasted_call (sec);
- while (pasty != NULL)
- {
- struct function_info *call_fun = pasty->fun;
- tmp = (align_power (tmp, call_fun->sec->alignment_power)
- + call_fun->sec->size);
- if (call_fun->rodata)
- {
- rotmp = (align_power (rotmp,
- call_fun->rodata->alignment_power)
- + call_fun->rodata->size);
- if (roalign < rosec->alignment_power)
- roalign = rosec->alignment_power;
- }
- for (pasty = call_fun->call_list; pasty; pasty = pasty->next)
- if (pasty->is_pasted)
- break;
- }
- }
- if (align_power (tmp, roalign) + rotmp > overlay_size)
- break;
- /* If we add this section, we might need new overlay call
- stubs. Add any overlay section calls to dummy_call. */
- pasty = NULL;
- sec_data = spu_elf_section_data (sec);
- sinfo = sec_data->u.i.stack_info;
- for (k = 0; k < (unsigned) sinfo->num_fun; ++k)
- for (call = sinfo->fun[k].call_list; call; call = call->next)
- if (call->is_pasted)
- {
- BFD_ASSERT (pasty == NULL);
- pasty = call;
- }
- else if (call->fun->sec->linker_mark)
- {
- if (!copy_callee (&dummy_caller, call))
- goto err_exit;
- }
- while (pasty != NULL)
- {
- struct function_info *call_fun = pasty->fun;
- pasty = NULL;
- for (call = call_fun->call_list; call; call = call->next)
- if (call->is_pasted)
- {
- BFD_ASSERT (pasty == NULL);
- pasty = call;
- }
- else if (!copy_callee (&dummy_caller, call))
- goto err_exit;
- }
- /* Calculate call stub size. */
- num_stubs = 0;
- for (call = dummy_caller.call_list; call; call = call->next)
- {
- unsigned int stub_delta = 1;
- if (htab->params->ovly_flavour == ovly_soft_icache)
- stub_delta = call->count;
- num_stubs += stub_delta;
- /* If the call is within this overlay, we won't need a
- stub. */
- for (k = base; k < i + 1; k++)
- if (call->fun->sec == ovly_sections[2 * k])
- {
- num_stubs -= stub_delta;
- break;
- }
- }
- if (htab->params->ovly_flavour == ovly_soft_icache
- && num_stubs > htab->params->max_branch)
- break;
- if (align_power (tmp, roalign) + rotmp
- + num_stubs * ovl_stub_size (htab->params) > overlay_size)
- break;
- size = tmp;
- rosize = rotmp;
- }
- if (i == base)
- {
- /* xgettext:c-format */
- info->callbacks->einfo (_("%pB:%pA%s exceeds overlay size\n"),
- ovly_sections[2 * i]->owner,
- ovly_sections[2 * i],
- ovly_sections[2 * i + 1] ? " + rodata" : "");
- bfd_set_error (bfd_error_bad_value);
- goto err_exit;
- }
- while (dummy_caller.call_list != NULL)
- {
- struct call_info *call = dummy_caller.call_list;
- dummy_caller.call_list = call->next;
- free (call);
- }
- ++ovlynum;
- while (base < i)
- ovly_map[base++] = ovlynum;
- }
- script = htab->params->spu_elf_open_overlay_script ();
- if (htab->params->ovly_flavour == ovly_soft_icache)
- {
- if (fprintf (script, "SECTIONS\n{\n") <= 0)
- goto file_err;
- if (fprintf (script,
- " . = ALIGN (%u);\n"
- " .ovl.init : { *(.ovl.init) }\n"
- " . = ABSOLUTE (ADDR (.ovl.init));\n",
- htab->params->line_size) <= 0)
- goto file_err;
- base = 0;
- ovlynum = 1;
- while (base < count)
- {
- unsigned int indx = ovlynum - 1;
- unsigned int vma, lma;
- vma = (indx & (htab->params->num_lines - 1)) << htab->line_size_log2;
- lma = vma + (((indx >> htab->num_lines_log2) + 1) << 18);
- if (fprintf (script, " .ovly%u ABSOLUTE (ADDR (.ovl.init)) + %u "
- ": AT (LOADADDR (.ovl.init) + %u) {\n",
- ovlynum, vma, lma) <= 0)
- goto file_err;
- base = print_one_overlay_section (script, base, count, ovlynum,
- ovly_map, ovly_sections, info);
- if (base == (unsigned) -1)
- goto file_err;
- if (fprintf (script, " }\n") <= 0)
- goto file_err;
- ovlynum++;
- }
- if (fprintf (script, " . = ABSOLUTE (ADDR (.ovl.init)) + %u;\n",
- 1 << (htab->num_lines_log2 + htab->line_size_log2)) <= 0)
- goto file_err;
- if (fprintf (script, "}\nINSERT AFTER .toe;\n") <= 0)
- goto file_err;
- }
- else
- {
- if (fprintf (script, "SECTIONS\n{\n") <= 0)
- goto file_err;
- if (fprintf (script,
- " . = ALIGN (16);\n"
- " .ovl.init : { *(.ovl.init) }\n"
- " . = ABSOLUTE (ADDR (.ovl.init));\n") <= 0)
- goto file_err;
- for (region = 1; region <= htab->params->num_lines; region++)
- {
- ovlynum = region;
- base = 0;
- while (base < count && ovly_map[base] < ovlynum)
- base++;
- if (base == count)
- break;
- if (region == 1)
- {
- /* We need to set lma since we are overlaying .ovl.init. */
- if (fprintf (script,
- " OVERLAY : AT (ALIGN (LOADADDR (.ovl.init) + SIZEOF (.ovl.init), 16))\n {\n") <= 0)
- goto file_err;
- }
- else
- {
- if (fprintf (script, " OVERLAY :\n {\n") <= 0)
- goto file_err;
- }
- while (base < count)
- {
- if (fprintf (script, " .ovly%u {\n", ovlynum) <= 0)
- goto file_err;
- base = print_one_overlay_section (script, base, count, ovlynum,
- ovly_map, ovly_sections, info);
- if (base == (unsigned) -1)
- goto file_err;
- if (fprintf (script, " }\n") <= 0)
- goto file_err;
- ovlynum += htab->params->num_lines;
- while (base < count && ovly_map[base] < ovlynum)
- base++;
- }
- if (fprintf (script, " }\n") <= 0)
- goto file_err;
- }
- if (fprintf (script, "}\nINSERT BEFORE .text;\n") <= 0)
- goto file_err;
- }
- free (ovly_map);
- free (ovly_sections);
- if (fclose (script) != 0)
- goto file_err;
- if (htab->params->auto_overlay & AUTO_RELINK)
- (*htab->params->spu_elf_relink) ();
- xexit (0);
- file_err:
- bfd_set_error (bfd_error_system_call);
- err_exit:
- info->callbacks->einfo (_("%F%P: auto overlay error: %E\n"));
- xexit (1);
- }
- /* Provide an estimate of total stack required. */
- static bool
- spu_elf_stack_analysis (struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab;
- struct _sum_stack_param sum_stack_param;
- if (!discover_functions (info))
- return false;
- if (!build_call_tree (info))
- return false;
- htab = spu_hash_table (info);
- if (htab->params->stack_analysis)
- {
- info->callbacks->info (_("Stack size for call graph root nodes.\n"));
- info->callbacks->minfo (_("\nStack size for functions. "
- "Annotations: '*' max stack, 't' tail call\n"));
- }
- sum_stack_param.emit_stack_syms = htab->params->emit_stack_syms;
- sum_stack_param.overall_stack = 0;
- if (!for_each_node (sum_stack, info, &sum_stack_param, true))
- return false;
- if (htab->params->stack_analysis)
- info->callbacks->info (_("Maximum stack required is 0x%v\n"),
- (bfd_vma) sum_stack_param.overall_stack);
- return true;
- }
- /* Perform a final link. */
- static bool
- spu_elf_final_link (bfd *output_bfd, struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- if (htab->params->auto_overlay)
- spu_elf_auto_overlay (info);
- if ((htab->params->stack_analysis
- || (htab->params->ovly_flavour == ovly_soft_icache
- && htab->params->lrlive_analysis))
- && !spu_elf_stack_analysis (info))
- info->callbacks->einfo (_("%X%P: stack/lrlive analysis error: %E\n"));
- if (!spu_elf_build_stubs (info))
- info->callbacks->einfo (_("%F%P: can not build overlay stubs: %E\n"));
- return bfd_elf_final_link (output_bfd, info);
- }
- /* Called when not normally emitting relocs, ie. !bfd_link_relocatable (info)
- and !info->emitrelocations. Returns a count of special relocs
- that need to be emitted. */
- static unsigned int
- spu_elf_count_relocs (struct bfd_link_info *info, asection *sec)
- {
- Elf_Internal_Rela *relocs;
- unsigned int count = 0;
- relocs = _bfd_elf_link_read_relocs (sec->owner, sec, NULL, NULL,
- info->keep_memory);
- if (relocs != NULL)
- {
- Elf_Internal_Rela *rel;
- Elf_Internal_Rela *relend = relocs + sec->reloc_count;
- for (rel = relocs; rel < relend; rel++)
- {
- int r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
- ++count;
- }
- if (elf_section_data (sec)->relocs != relocs)
- free (relocs);
- }
- return count;
- }
- /* Functions for adding fixup records to .fixup */
- #define FIXUP_RECORD_SIZE 4
- #define FIXUP_PUT(output_bfd,htab,index,addr) \
- bfd_put_32 (output_bfd, addr, \
- htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
- #define FIXUP_GET(output_bfd,htab,index) \
- bfd_get_32 (output_bfd, \
- htab->sfixup->contents + FIXUP_RECORD_SIZE * (index))
- /* Store OFFSET in .fixup. This assumes it will be called with an
- increasing OFFSET. When this OFFSET fits with the last base offset,
- it just sets a bit, otherwise it adds a new fixup record. */
- static void
- spu_elf_emit_fixup (bfd * output_bfd, struct bfd_link_info *info,
- bfd_vma offset)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- asection *sfixup = htab->sfixup;
- bfd_vma qaddr = offset & ~(bfd_vma) 15;
- bfd_vma bit = ((bfd_vma) 8) >> ((offset & 15) >> 2);
- if (sfixup->reloc_count == 0)
- {
- FIXUP_PUT (output_bfd, htab, 0, qaddr | bit);
- sfixup->reloc_count++;
- }
- else
- {
- bfd_vma base = FIXUP_GET (output_bfd, htab, sfixup->reloc_count - 1);
- if (qaddr != (base & ~(bfd_vma) 15))
- {
- if ((sfixup->reloc_count + 1) * FIXUP_RECORD_SIZE > sfixup->size)
- _bfd_error_handler (_("fatal error while creating .fixup"));
- FIXUP_PUT (output_bfd, htab, sfixup->reloc_count, qaddr | bit);
- sfixup->reloc_count++;
- }
- else
- FIXUP_PUT (output_bfd, htab, sfixup->reloc_count - 1, base | bit);
- }
- }
- /* Apply RELOCS to CONTENTS of INPUT_SECTION from INPUT_BFD. */
- static int
- spu_elf_relocate_section (bfd *output_bfd,
- struct bfd_link_info *info,
- bfd *input_bfd,
- asection *input_section,
- bfd_byte *contents,
- Elf_Internal_Rela *relocs,
- Elf_Internal_Sym *local_syms,
- asection **local_sections)
- {
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- Elf_Internal_Rela *rel, *relend;
- struct spu_link_hash_table *htab;
- asection *ea;
- int ret = true;
- bool emit_these_relocs = false;
- bool is_ea_sym;
- bool stubs;
- unsigned int iovl = 0;
- htab = spu_hash_table (info);
- stubs = (htab->stub_sec != NULL
- && maybe_needs_stubs (input_section));
- iovl = overlay_index (input_section);
- ea = bfd_get_section_by_name (output_bfd, "._ea");
- symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
- sym_hashes = (struct elf_link_hash_entry **) (elf_sym_hashes (input_bfd));
- rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int r_type;
- reloc_howto_type *howto;
- unsigned int r_symndx;
- Elf_Internal_Sym *sym;
- asection *sec;
- struct elf_link_hash_entry *h;
- const char *sym_name;
- bfd_vma relocation;
- bfd_vma addend;
- bfd_reloc_status_type r;
- bool unresolved_reloc;
- enum _stub_type stub_type;
- r_symndx = ELF32_R_SYM (rel->r_info);
- r_type = ELF32_R_TYPE (rel->r_info);
- howto = elf_howto_table + r_type;
- unresolved_reloc = false;
- h = NULL;
- sym = NULL;
- sec = NULL;
- if (r_symndx < symtab_hdr->sh_info)
- {
- sym = local_syms + r_symndx;
- sec = local_sections[r_symndx];
- sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
- relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
- }
- else
- {
- if (sym_hashes == NULL)
- return false;
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- if (info->wrap_hash != NULL
- && (input_section->flags & SEC_DEBUGGING) != 0)
- h = ((struct elf_link_hash_entry *)
- unwrap_hash_lookup (info, input_bfd, &h->root));
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
- relocation = 0;
- if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- sec = h->root.u.def.section;
- if (sec == NULL
- || sec->output_section == NULL)
- /* Set a flag that will be cleared later if we find a
- relocation value for this symbol. output_section
- is typically NULL for symbols satisfied by a shared
- library. */
- unresolved_reloc = true;
- else
- relocation = (h->root.u.def.value
- + sec->output_section->vma
- + sec->output_offset);
- }
- else if (h->root.type == bfd_link_hash_undefweak)
- ;
- else if (info->unresolved_syms_in_objects == RM_IGNORE
- && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
- ;
- else if (!bfd_link_relocatable (info)
- && !(r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64))
- {
- bool err;
- err = (info->unresolved_syms_in_objects == RM_DIAGNOSE
- && !info->warn_unresolved_syms)
- || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT;
- info->callbacks->undefined_symbol
- (info, h->root.root.string, input_bfd,
- input_section, rel->r_offset, err);
- }
- sym_name = h->root.root.string;
- }
- if (sec != NULL && discarded_section (sec))
- RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
- rel, 1, relend, howto, 0, contents);
- if (bfd_link_relocatable (info))
- continue;
- /* Change "a rt,ra,rb" to "ai rt,ra,0". */
- if (r_type == R_SPU_ADD_PIC
- && h != NULL
- && !(h->def_regular || ELF_COMMON_DEF_P (h)))
- {
- bfd_byte *loc = contents + rel->r_offset;
- loc[0] = 0x1c;
- loc[1] = 0x00;
- loc[2] &= 0x3f;
- }
- is_ea_sym = (ea != NULL
- && sec != NULL
- && sec->output_section == ea);
- /* If this symbol is in an overlay area, we may need to relocate
- to the overlay stub. */
- addend = rel->r_addend;
- if (stubs
- && !is_ea_sym
- && (stub_type = needs_ovl_stub (h, sym, sec, input_section, rel,
- contents, info)) != no_stub)
- {
- unsigned int ovl = 0;
- struct got_entry *g, **head;
- if (stub_type != nonovl_stub)
- ovl = iovl;
- if (h != NULL)
- head = &h->got.glist;
- else
- head = elf_local_got_ents (input_bfd) + r_symndx;
- for (g = *head; g != NULL; g = g->next)
- if (htab->params->ovly_flavour == ovly_soft_icache
- ? (g->ovl == ovl
- && g->br_addr == (rel->r_offset
- + input_section->output_offset
- + input_section->output_section->vma))
- : g->addend == addend && (g->ovl == ovl || g->ovl == 0))
- break;
- if (g == NULL)
- abort ();
- relocation = g->stub_addr;
- addend = 0;
- }
- else
- {
- /* For soft icache, encode the overlay index into addresses. */
- if (htab->params->ovly_flavour == ovly_soft_icache
- && (r_type == R_SPU_ADDR16_HI
- || r_type == R_SPU_ADDR32 || r_type == R_SPU_REL32)
- && !is_ea_sym)
- {
- unsigned int ovl = overlay_index (sec);
- if (ovl != 0)
- {
- unsigned int set_id = ((ovl - 1) >> htab->num_lines_log2) + 1;
- relocation += set_id << 18;
- }
- }
- }
- if (htab->params->emit_fixups && !bfd_link_relocatable (info)
- && (input_section->flags & SEC_ALLOC) != 0
- && r_type == R_SPU_ADDR32)
- {
- bfd_vma offset;
- offset = rel->r_offset + input_section->output_section->vma
- + input_section->output_offset;
- spu_elf_emit_fixup (output_bfd, info, offset);
- }
- if (unresolved_reloc)
- ;
- else if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
- {
- if (is_ea_sym)
- {
- /* ._ea is a special section that isn't allocated in SPU
- memory, but rather occupies space in PPU memory as
- part of an embedded ELF image. If this reloc is
- against a symbol defined in ._ea, then transform the
- reloc into an equivalent one without a symbol
- relative to the start of the ELF image. */
- rel->r_addend += (relocation
- - ea->vma
- + elf_section_data (ea)->this_hdr.sh_offset);
- rel->r_info = ELF32_R_INFO (0, r_type);
- }
- emit_these_relocs = true;
- continue;
- }
- else if (is_ea_sym)
- unresolved_reloc = true;
- if (unresolved_reloc
- && _bfd_elf_section_offset (output_bfd, info, input_section,
- rel->r_offset) != (bfd_vma) -1)
- {
- _bfd_error_handler
- /* xgettext:c-format */
- (_("%pB(%s+%#" PRIx64 "): "
- "unresolvable %s relocation against symbol `%s'"),
- input_bfd,
- bfd_section_name (input_section),
- (uint64_t) rel->r_offset,
- howto->name,
- sym_name);
- ret = false;
- }
- r = _bfd_final_link_relocate (howto,
- input_bfd,
- input_section,
- contents,
- rel->r_offset, relocation, addend);
- if (r != bfd_reloc_ok)
- {
- const char *msg = (const char *) 0;
- switch (r)
- {
- case bfd_reloc_overflow:
- (*info->callbacks->reloc_overflow)
- (info, (h ? &h->root : NULL), sym_name, howto->name,
- (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
- break;
- case bfd_reloc_undefined:
- (*info->callbacks->undefined_symbol)
- (info, sym_name, input_bfd, input_section, rel->r_offset, true);
- break;
- case bfd_reloc_outofrange:
- msg = _("internal error: out of range error");
- goto common_error;
- case bfd_reloc_notsupported:
- msg = _("internal error: unsupported relocation error");
- goto common_error;
- case bfd_reloc_dangerous:
- msg = _("internal error: dangerous error");
- goto common_error;
- default:
- msg = _("internal error: unknown error");
- /* fall through */
- common_error:
- ret = false;
- (*info->callbacks->warning) (info, msg, sym_name, input_bfd,
- input_section, rel->r_offset);
- break;
- }
- }
- }
- if (ret
- && emit_these_relocs
- && !info->emitrelocations)
- {
- Elf_Internal_Rela *wrel;
- Elf_Internal_Shdr *rel_hdr;
- wrel = rel = relocs;
- relend = relocs + input_section->reloc_count;
- for (; rel < relend; rel++)
- {
- int r_type;
- r_type = ELF32_R_TYPE (rel->r_info);
- if (r_type == R_SPU_PPU32 || r_type == R_SPU_PPU64)
- *wrel++ = *rel;
- }
- input_section->reloc_count = wrel - relocs;
- /* Backflips for _bfd_elf_link_output_relocs. */
- rel_hdr = _bfd_elf_single_rel_hdr (input_section);
- rel_hdr->sh_size = input_section->reloc_count * rel_hdr->sh_entsize;
- ret = 2;
- }
- return ret;
- }
- static bool
- spu_elf_finish_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info ATTRIBUTE_UNUSED)
- {
- return true;
- }
- /* Adjust _SPUEAR_ syms to point at their overlay stubs. */
- static int
- spu_elf_output_symbol_hook (struct bfd_link_info *info,
- const char *sym_name ATTRIBUTE_UNUSED,
- Elf_Internal_Sym *sym,
- asection *sym_sec ATTRIBUTE_UNUSED,
- struct elf_link_hash_entry *h)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- if (!bfd_link_relocatable (info)
- && htab->stub_sec != NULL
- && h != NULL
- && (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- && h->def_regular
- && startswith (h->root.root.string, "_SPUEAR_"))
- {
- struct got_entry *g;
- for (g = h->got.glist; g != NULL; g = g->next)
- if (htab->params->ovly_flavour == ovly_soft_icache
- ? g->br_addr == g->stub_addr
- : g->addend == 0 && g->ovl == 0)
- {
- sym->st_shndx = (_bfd_elf_section_from_bfd_section
- (htab->stub_sec[0]->output_section->owner,
- htab->stub_sec[0]->output_section));
- sym->st_value = g->stub_addr;
- break;
- }
- }
- return 1;
- }
- static int spu_plugin = 0;
- void
- spu_elf_plugin (int val)
- {
- spu_plugin = val;
- }
- /* Set ELF header e_type for plugins. */
- static bool
- spu_elf_init_file_header (bfd *abfd, struct bfd_link_info *info)
- {
- if (!_bfd_elf_init_file_header (abfd, info))
- return false;
- if (spu_plugin)
- {
- Elf_Internal_Ehdr *i_ehdrp = elf_elfheader (abfd);
- i_ehdrp->e_type = ET_DYN;
- }
- return true;
- }
- /* We may add an extra PT_LOAD segment for .toe. We also need extra
- segments for overlays. */
- static int
- spu_elf_additional_program_headers (bfd *abfd, struct bfd_link_info *info)
- {
- int extra = 0;
- asection *sec;
- if (info != NULL)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- extra = htab->num_overlays;
- }
- if (extra)
- ++extra;
- sec = bfd_get_section_by_name (abfd, ".toe");
- if (sec != NULL && (sec->flags & SEC_LOAD) != 0)
- ++extra;
- return extra;
- }
- /* Remove .toe section from other PT_LOAD segments and put it in
- a segment of its own. Put overlays in separate segments too. */
- static bool
- spu_elf_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
- {
- asection *toe, *s;
- struct elf_segment_map *m, *m_overlay;
- struct elf_segment_map **p, **p_overlay, **first_load;
- unsigned int i;
- if (info == NULL)
- return true;
- toe = bfd_get_section_by_name (abfd, ".toe");
- for (m = elf_seg_map (abfd); m != NULL; m = m->next)
- if (m->p_type == PT_LOAD && m->count > 1)
- for (i = 0; i < m->count; i++)
- if ((s = m->sections[i]) == toe
- || spu_elf_section_data (s)->u.o.ovl_index != 0)
- {
- struct elf_segment_map *m2;
- bfd_vma amt;
- if (i + 1 < m->count)
- {
- amt = sizeof (struct elf_segment_map);
- amt += (m->count - (i + 2)) * sizeof (m->sections[0]);
- m2 = bfd_zalloc (abfd, amt);
- if (m2 == NULL)
- return false;
- m2->count = m->count - (i + 1);
- memcpy (m2->sections, m->sections + i + 1,
- m2->count * sizeof (m->sections[0]));
- m2->p_type = PT_LOAD;
- m2->next = m->next;
- m->next = m2;
- }
- m->count = 1;
- if (i != 0)
- {
- m->count = i;
- amt = sizeof (struct elf_segment_map);
- m2 = bfd_zalloc (abfd, amt);
- if (m2 == NULL)
- return false;
- m2->p_type = PT_LOAD;
- m2->count = 1;
- m2->sections[0] = s;
- m2->next = m->next;
- m->next = m2;
- }
- break;
- }
- /* Some SPU ELF loaders ignore the PF_OVERLAY flag and just load all
- PT_LOAD segments. This can cause the .ovl.init section to be
- overwritten with the contents of some overlay segment. To work
- around this issue, we ensure that all PF_OVERLAY segments are
- sorted first amongst the program headers; this ensures that even
- with a broken loader, the .ovl.init section (which is not marked
- as PF_OVERLAY) will be placed into SPU local store on startup. */
- /* Move all overlay segments onto a separate list. */
- p = &elf_seg_map (abfd);
- p_overlay = &m_overlay;
- m_overlay = NULL;
- first_load = NULL;
- while (*p != NULL)
- {
- if ((*p)->p_type == PT_LOAD)
- {
- if (!first_load)
- first_load = p;
- if ((*p)->count == 1
- && spu_elf_section_data ((*p)->sections[0])->u.o.ovl_index != 0)
- {
- m = *p;
- m->no_sort_lma = 1;
- *p = m->next;
- *p_overlay = m;
- p_overlay = &m->next;
- continue;
- }
- }
- p = &((*p)->next);
- }
- /* Re-insert overlay segments at the head of the segment map. */
- if (m_overlay != NULL)
- {
- p = first_load;
- if (*p != NULL && (*p)->p_type == PT_LOAD && (*p)->includes_filehdr)
- /* It doesn't really make sense for someone to include the ELF
- file header into an spu image, but if they do the code that
- assigns p_offset needs to see the segment containing the
- header first. */
- p = &(*p)->next;
- *p_overlay = *p;
- *p = m_overlay;
- }
- return true;
- }
- /* Tweak the section type of .note.spu_name. */
- static bool
- spu_elf_fake_sections (bfd *obfd ATTRIBUTE_UNUSED,
- Elf_Internal_Shdr *hdr,
- asection *sec)
- {
- if (strcmp (sec->name, SPU_PTNOTE_SPUNAME) == 0)
- hdr->sh_type = SHT_NOTE;
- return true;
- }
- /* Tweak phdrs before writing them out. */
- static bool
- spu_elf_modify_headers (bfd *abfd, struct bfd_link_info *info)
- {
- if (info != NULL)
- {
- const struct elf_backend_data *bed;
- struct elf_obj_tdata *tdata;
- Elf_Internal_Phdr *phdr, *last;
- struct spu_link_hash_table *htab;
- unsigned int count;
- unsigned int i;
- bed = get_elf_backend_data (abfd);
- tdata = elf_tdata (abfd);
- phdr = tdata->phdr;
- count = elf_program_header_size (abfd) / bed->s->sizeof_phdr;
- htab = spu_hash_table (info);
- if (htab->num_overlays != 0)
- {
- struct elf_segment_map *m;
- unsigned int o;
- for (i = 0, m = elf_seg_map (abfd); m; ++i, m = m->next)
- if (m->count != 0
- && ((o = spu_elf_section_data (m->sections[0])->u.o.ovl_index)
- != 0))
- {
- /* Mark this as an overlay header. */
- phdr[i].p_flags |= PF_OVERLAY;
- if (htab->ovtab != NULL && htab->ovtab->size != 0
- && htab->params->ovly_flavour != ovly_soft_icache)
- {
- bfd_byte *p = htab->ovtab->contents;
- unsigned int off = o * 16 + 8;
- /* Write file_off into _ovly_table. */
- bfd_put_32 (htab->ovtab->owner, phdr[i].p_offset, p + off);
- }
- }
- /* Soft-icache has its file offset put in .ovl.init. */
- if (htab->init != NULL && htab->init->size != 0)
- {
- bfd_vma val
- = elf_section_data (htab->ovl_sec[0])->this_hdr.sh_offset;
- bfd_put_32 (htab->init->owner, val, htab->init->contents + 4);
- }
- }
- /* Round up p_filesz and p_memsz of PT_LOAD segments to multiples
- of 16. This should always be possible when using the standard
- linker scripts, but don't create overlapping segments if
- someone is playing games with linker scripts. */
- last = NULL;
- for (i = count; i-- != 0; )
- if (phdr[i].p_type == PT_LOAD)
- {
- unsigned adjust;
- adjust = -phdr[i].p_filesz & 15;
- if (adjust != 0
- && last != NULL
- && (phdr[i].p_offset + phdr[i].p_filesz
- > last->p_offset - adjust))
- break;
- adjust = -phdr[i].p_memsz & 15;
- if (adjust != 0
- && last != NULL
- && phdr[i].p_filesz != 0
- && phdr[i].p_vaddr + phdr[i].p_memsz > last->p_vaddr - adjust
- && phdr[i].p_vaddr + phdr[i].p_memsz <= last->p_vaddr)
- break;
- if (phdr[i].p_filesz != 0)
- last = &phdr[i];
- }
- if (i == (unsigned int) -1)
- for (i = count; i-- != 0; )
- if (phdr[i].p_type == PT_LOAD)
- {
- unsigned adjust;
- adjust = -phdr[i].p_filesz & 15;
- phdr[i].p_filesz += adjust;
- adjust = -phdr[i].p_memsz & 15;
- phdr[i].p_memsz += adjust;
- }
- }
- return _bfd_elf_modify_headers (abfd, info);
- }
- bool
- spu_elf_size_sections (bfd *obfd ATTRIBUTE_UNUSED, struct bfd_link_info *info)
- {
- struct spu_link_hash_table *htab = spu_hash_table (info);
- if (htab->params->emit_fixups)
- {
- asection *sfixup = htab->sfixup;
- int fixup_count = 0;
- bfd *ibfd;
- size_t size;
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
- {
- asection *isec;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
- continue;
- /* Walk over each section attached to the input bfd. */
- for (isec = ibfd->sections; isec != NULL; isec = isec->next)
- {
- Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
- bfd_vma base_end;
- /* If there aren't any relocs, then there's nothing more
- to do. */
- if ((isec->flags & SEC_ALLOC) == 0
- || (isec->flags & SEC_RELOC) == 0
- || isec->reloc_count == 0)
- continue;
- /* Get the relocs. */
- internal_relocs =
- _bfd_elf_link_read_relocs (ibfd, isec, NULL, NULL,
- info->keep_memory);
- if (internal_relocs == NULL)
- return false;
- /* 1 quadword can contain up to 4 R_SPU_ADDR32
- relocations. They are stored in a single word by
- saving the upper 28 bits of the address and setting the
- lower 4 bits to a bit mask of the words that have the
- relocation. BASE_END keeps track of the next quadword. */
- irela = internal_relocs;
- irelaend = irela + isec->reloc_count;
- base_end = 0;
- for (; irela < irelaend; irela++)
- if (ELF32_R_TYPE (irela->r_info) == R_SPU_ADDR32
- && irela->r_offset >= base_end)
- {
- base_end = (irela->r_offset & ~(bfd_vma) 15) + 16;
- fixup_count++;
- }
- }
- }
- /* We always have a NULL fixup as a sentinel */
- size = (fixup_count + 1) * FIXUP_RECORD_SIZE;
- if (!bfd_set_section_size (sfixup, size))
- return false;
- sfixup->contents = (bfd_byte *) bfd_zalloc (info->input_bfds, size);
- if (sfixup->contents == NULL)
- return false;
- }
- return true;
- }
- #define TARGET_BIG_SYM spu_elf32_vec
- #define TARGET_BIG_NAME "elf32-spu"
- #define ELF_ARCH bfd_arch_spu
- #define ELF_TARGET_ID SPU_ELF_DATA
- #define ELF_MACHINE_CODE EM_SPU
- /* This matches the alignment need for DMA. */
- #define ELF_MAXPAGESIZE 0x80
- #define elf_backend_rela_normal 1
- #define elf_backend_can_gc_sections 1
- #define bfd_elf32_bfd_reloc_type_lookup spu_elf_reloc_type_lookup
- #define bfd_elf32_bfd_reloc_name_lookup spu_elf_reloc_name_lookup
- #define elf_info_to_howto spu_elf_info_to_howto
- #define elf_backend_count_relocs spu_elf_count_relocs
- #define elf_backend_relocate_section spu_elf_relocate_section
- #define elf_backend_finish_dynamic_sections spu_elf_finish_dynamic_sections
- #define elf_backend_symbol_processing spu_elf_backend_symbol_processing
- #define elf_backend_link_output_symbol_hook spu_elf_output_symbol_hook
- #define elf_backend_object_p spu_elf_object_p
- #define bfd_elf32_new_section_hook spu_elf_new_section_hook
- #define bfd_elf32_bfd_link_hash_table_create spu_elf_link_hash_table_create
- #define elf_backend_additional_program_headers spu_elf_additional_program_headers
- #define elf_backend_modify_segment_map spu_elf_modify_segment_map
- #define elf_backend_modify_headers spu_elf_modify_headers
- #define elf_backend_init_file_header spu_elf_init_file_header
- #define elf_backend_fake_sections spu_elf_fake_sections
- #define elf_backend_special_sections spu_elf_special_sections
- #define bfd_elf32_bfd_final_link spu_elf_final_link
- #include "elf32-target.h"
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