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- /* Target-dependent code for UltraSPARC.
- Copyright (C) 2003-2022 Free Software Foundation, Inc.
- This file is part of GDB.
- 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, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "arch-utils.h"
- #include "dwarf2/frame.h"
- #include "frame.h"
- #include "frame-base.h"
- #include "frame-unwind.h"
- #include "gdbcore.h"
- #include "gdbtypes.h"
- #include "inferior.h"
- #include "symtab.h"
- #include "objfiles.h"
- #include "osabi.h"
- #include "regcache.h"
- #include "target-descriptions.h"
- #include "target.h"
- #include "value.h"
- #include "sparc64-tdep.h"
- #include <forward_list>
- /* This file implements the SPARC 64-bit ABI as defined by the
- section "Low-Level System Information" of the SPARC Compliance
- Definition (SCD) 2.4.1, which is the 64-bit System V psABI for
- SPARC. */
- /* Please use the sparc32_-prefix for 32-bit specific code, the
- sparc64_-prefix for 64-bit specific code and the sparc_-prefix for
- code can handle both. */
- /* The M7 processor supports an Application Data Integrity (ADI) feature
- that detects invalid data accesses. When software allocates memory and
- enables ADI on the allocated memory, it chooses a 4-bit version number,
- sets the version in the upper 4 bits of the 64-bit pointer to that data,
- and stores the 4-bit version in every cacheline of the object. Hardware
- saves the latter in spare bits in the cache and memory hierarchy. On each
- load and store, the processor compares the upper 4 VA (virtual address) bits
- to the cacheline's version. If there is a mismatch, the processor generates
- a version mismatch trap which can be either precise or disrupting.
- The trap is an error condition which the kernel delivers to the process
- as a SIGSEGV signal.
- The upper 4 bits of the VA represent a version and are not part of the
- true address. The processor clears these bits and sign extends bit 59
- to generate the true address.
- Note that 32-bit applications cannot use ADI. */
- #include <algorithm>
- #include "cli/cli-utils.h"
- #include "gdbcmd.h"
- #include "auxv.h"
- #define MAX_PROC_NAME_SIZE sizeof("/proc/99999/lwp/9999/adi/lstatus")
- /* ELF Auxiliary vectors */
- #ifndef AT_ADI_BLKSZ
- #define AT_ADI_BLKSZ 34
- #endif
- #ifndef AT_ADI_NBITS
- #define AT_ADI_NBITS 35
- #endif
- #ifndef AT_ADI_UEONADI
- #define AT_ADI_UEONADI 36
- #endif
- /* ADI command list. */
- static struct cmd_list_element *sparc64adilist = NULL;
- /* ADI stat settings. */
- struct adi_stat_t
- {
- /* The ADI block size. */
- unsigned long blksize;
- /* Number of bits used for an ADI version tag which can be
- used together with the shift value for an ADI version tag
- to encode or extract the ADI version value in a pointer. */
- unsigned long nbits;
- /* The maximum ADI version tag value supported. */
- int max_version;
- /* ADI version tag file. */
- int tag_fd = 0;
- /* ADI availability check has been done. */
- bool checked_avail = false;
- /* ADI is available. */
- bool is_avail = false;
- };
- /* Per-process ADI stat info. */
- struct sparc64_adi_info
- {
- sparc64_adi_info (pid_t pid_)
- : pid (pid_)
- {}
- /* The process identifier. */
- pid_t pid;
- /* The ADI stat. */
- adi_stat_t stat = {};
- };
- static std::forward_list<sparc64_adi_info> adi_proc_list;
- /* Get ADI info for process PID, creating one if it doesn't exist. */
- static sparc64_adi_info *
- get_adi_info_proc (pid_t pid)
- {
- auto found = std::find_if (adi_proc_list.begin (), adi_proc_list.end (),
- [&pid] (const sparc64_adi_info &info)
- {
- return info.pid == pid;
- });
- if (found == adi_proc_list.end ())
- {
- adi_proc_list.emplace_front (pid);
- return &adi_proc_list.front ();
- }
- else
- {
- return &(*found);
- }
- }
- static adi_stat_t
- get_adi_info (pid_t pid)
- {
- sparc64_adi_info *proc;
- proc = get_adi_info_proc (pid);
- return proc->stat;
- }
- /* Is called when GDB is no longer debugging process PID. It
- deletes data structure that keeps track of the ADI stat. */
- void
- sparc64_forget_process (pid_t pid)
- {
- int target_errno;
- for (auto pit = adi_proc_list.before_begin (),
- it = std::next (pit);
- it != adi_proc_list.end ();
- )
- {
- if ((*it).pid == pid)
- {
- if ((*it).stat.tag_fd > 0)
- target_fileio_close ((*it).stat.tag_fd, &target_errno);
- adi_proc_list.erase_after (pit);
- break;
- }
- else
- pit = it++;
- }
- }
- /* Read attributes of a maps entry in /proc/[pid]/adi/maps. */
- static void
- read_maps_entry (const char *line,
- ULONGEST *addr, ULONGEST *endaddr)
- {
- const char *p = line;
- *addr = strtoulst (p, &p, 16);
- if (*p == '-')
- p++;
- *endaddr = strtoulst (p, &p, 16);
- }
- /* Check if ADI is available. */
- static bool
- adi_available (void)
- {
- pid_t pid = inferior_ptid.pid ();
- sparc64_adi_info *proc = get_adi_info_proc (pid);
- CORE_ADDR value;
- if (proc->stat.checked_avail)
- return proc->stat.is_avail;
- proc->stat.checked_avail = true;
- if (target_auxv_search (current_inferior ()->top_target (),
- AT_ADI_BLKSZ, &value) <= 0)
- return false;
- proc->stat.blksize = value;
- target_auxv_search (current_inferior ()->top_target (),
- AT_ADI_NBITS, &value);
- proc->stat.nbits = value;
- proc->stat.max_version = (1 << proc->stat.nbits) - 2;
- proc->stat.is_avail = true;
- return proc->stat.is_avail;
- }
- /* Normalize a versioned address - a VA with ADI bits (63-60) set. */
- static CORE_ADDR
- adi_normalize_address (CORE_ADDR addr)
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- if (ast.nbits)
- {
- /* Clear upper bits. */
- addr &= ((uint64_t) -1) >> ast.nbits;
- /* Sign extend. */
- CORE_ADDR signbit = (uint64_t) 1 << (64 - ast.nbits - 1);
- return (addr ^ signbit) - signbit;
- }
- return addr;
- }
- /* Align a normalized address - a VA with bit 59 sign extended into
- ADI bits. */
- static CORE_ADDR
- adi_align_address (CORE_ADDR naddr)
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- return (naddr - (naddr % ast.blksize)) / ast.blksize;
- }
- /* Convert a byte count to count at a ratio of 1:adi_blksz. */
- static int
- adi_convert_byte_count (CORE_ADDR naddr, int nbytes, CORE_ADDR locl)
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- return ((naddr + nbytes + ast.blksize - 1) / ast.blksize) - locl;
- }
- /* The /proc/[pid]/adi/tags file, which allows gdb to get/set ADI
- version in a target process, maps linearly to the address space
- of the target process at a ratio of 1:adi_blksz.
- A read (or write) at offset K in the file returns (or modifies)
- the ADI version tag stored in the cacheline containing address
- K * adi_blksz, encoded as 1 version tag per byte. The allowed
- version tag values are between 0 and adi_stat.max_version. */
- static int
- adi_tag_fd (void)
- {
- pid_t pid = inferior_ptid.pid ();
- sparc64_adi_info *proc = get_adi_info_proc (pid);
- if (proc->stat.tag_fd != 0)
- return proc->stat.tag_fd;
- char cl_name[MAX_PROC_NAME_SIZE];
- snprintf (cl_name, sizeof(cl_name), "/proc/%ld/adi/tags", (long) pid);
- int target_errno;
- proc->stat.tag_fd = target_fileio_open (NULL, cl_name, O_RDWR|O_EXCL,
- false, 0, &target_errno);
- return proc->stat.tag_fd;
- }
- /* Check if an address set is ADI enabled, using /proc/[pid]/adi/maps
- which was exported by the kernel and contains the currently ADI
- mapped memory regions and their access permissions. */
- static bool
- adi_is_addr_mapped (CORE_ADDR vaddr, size_t cnt)
- {
- char filename[MAX_PROC_NAME_SIZE];
- size_t i = 0;
- pid_t pid = inferior_ptid.pid ();
- snprintf (filename, sizeof filename, "/proc/%ld/adi/maps", (long) pid);
- gdb::unique_xmalloc_ptr<char> data
- = target_fileio_read_stralloc (NULL, filename);
- if (data)
- {
- adi_stat_t adi_stat = get_adi_info (pid);
- char *saveptr;
- for (char *line = strtok_r (data.get (), "\n", &saveptr);
- line;
- line = strtok_r (NULL, "\n", &saveptr))
- {
- ULONGEST addr, endaddr;
- read_maps_entry (line, &addr, &endaddr);
- while (((vaddr + i) * adi_stat.blksize) >= addr
- && ((vaddr + i) * adi_stat.blksize) < endaddr)
- {
- if (++i == cnt)
- return true;
- }
- }
- }
- else
- warning (_("unable to open /proc file '%s'"), filename);
- return false;
- }
- /* Read ADI version tag value for memory locations starting at "VADDR"
- for "SIZE" number of bytes. */
- static int
- adi_read_versions (CORE_ADDR vaddr, size_t size, gdb_byte *tags)
- {
- int fd = adi_tag_fd ();
- if (fd == -1)
- return -1;
- if (!adi_is_addr_mapped (vaddr, size))
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- error(_("Address at %s is not in ADI maps"),
- paddress (target_gdbarch (), vaddr * ast.blksize));
- }
- int target_errno;
- return target_fileio_pread (fd, tags, size, vaddr, &target_errno);
- }
- /* Write ADI version tag for memory locations starting at "VADDR" for
- "SIZE" number of bytes to "TAGS". */
- static int
- adi_write_versions (CORE_ADDR vaddr, size_t size, unsigned char *tags)
- {
- int fd = adi_tag_fd ();
- if (fd == -1)
- return -1;
- if (!adi_is_addr_mapped (vaddr, size))
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- error(_("Address at %s is not in ADI maps"),
- paddress (target_gdbarch (), vaddr * ast.blksize));
- }
- int target_errno;
- return target_fileio_pwrite (fd, tags, size, vaddr, &target_errno);
- }
- /* Print ADI version tag value in "TAGS" for memory locations starting
- at "VADDR" with number of "CNT". */
- static void
- adi_print_versions (CORE_ADDR vaddr, size_t cnt, gdb_byte *tags)
- {
- int v_idx = 0;
- const int maxelts = 8; /* # of elements per line */
- adi_stat_t adi_stat = get_adi_info (inferior_ptid.pid ());
- while (cnt > 0)
- {
- QUIT;
- gdb_printf ("%s:\t",
- paddress (target_gdbarch (), vaddr * adi_stat.blksize));
- for (int i = maxelts; i > 0 && cnt > 0; i--, cnt--)
- {
- if (tags[v_idx] == 0xff) /* no version tag */
- gdb_printf ("-");
- else
- gdb_printf ("%1X", tags[v_idx]);
- if (cnt > 1)
- gdb_printf (" ");
- ++v_idx;
- }
- gdb_printf ("\n");
- vaddr += maxelts;
- }
- }
- static void
- do_examine (CORE_ADDR start, int bcnt)
- {
- CORE_ADDR vaddr = adi_normalize_address (start);
- CORE_ADDR vstart = adi_align_address (vaddr);
- int cnt = adi_convert_byte_count (vaddr, bcnt, vstart);
- gdb::def_vector<gdb_byte> buf (cnt);
- int read_cnt = adi_read_versions (vstart, cnt, buf.data ());
- if (read_cnt == -1)
- error (_("No ADI information"));
- else if (read_cnt < cnt)
- error(_("No ADI information at %s"), paddress (target_gdbarch (), vaddr));
- adi_print_versions (vstart, cnt, buf.data ());
- }
- static void
- do_assign (CORE_ADDR start, size_t bcnt, int version)
- {
- CORE_ADDR vaddr = adi_normalize_address (start);
- CORE_ADDR vstart = adi_align_address (vaddr);
- int cnt = adi_convert_byte_count (vaddr, bcnt, vstart);
- std::vector<unsigned char> buf (cnt, version);
- int set_cnt = adi_write_versions (vstart, cnt, buf.data ());
- if (set_cnt == -1)
- error (_("No ADI information"));
- else if (set_cnt < cnt)
- error(_("No ADI information at %s"), paddress (target_gdbarch (), vaddr));
- }
- /* ADI examine version tag command.
- Command syntax:
- adi (examine|x)[/COUNT] [ADDR] */
- static void
- adi_examine_command (const char *args, int from_tty)
- {
- /* make sure program is active and adi is available */
- if (!target_has_execution ())
- error (_("ADI command requires a live process/thread"));
- if (!adi_available ())
- error (_("No ADI information"));
- int cnt = 1;
- const char *p = args;
- if (p && *p == '/')
- {
- p++;
- cnt = get_number (&p);
- }
- CORE_ADDR next_address = 0;
- if (p != 0 && *p != 0)
- next_address = parse_and_eval_address (p);
- if (!cnt || !next_address)
- error (_("Usage: adi examine|x[/COUNT] [ADDR]"));
- do_examine (next_address, cnt);
- }
- /* ADI assign version tag command.
- Command syntax:
- adi (assign|a)[/COUNT] ADDR = VERSION */
- static void
- adi_assign_command (const char *args, int from_tty)
- {
- static const char *adi_usage
- = N_("Usage: adi assign|a[/COUNT] ADDR = VERSION");
- /* make sure program is active and adi is available */
- if (!target_has_execution ())
- error (_("ADI command requires a live process/thread"));
- if (!adi_available ())
- error (_("No ADI information"));
- const char *exp = args;
- if (exp == 0)
- error_no_arg (_(adi_usage));
- char *q = (char *) strchr (exp, '=');
- if (q)
- *q++ = 0;
- else
- error ("%s", _(adi_usage));
- size_t cnt = 1;
- const char *p = args;
- if (exp && *exp == '/')
- {
- p = exp + 1;
- cnt = get_number (&p);
- }
- CORE_ADDR next_address = 0;
- if (p != 0 && *p != 0)
- next_address = parse_and_eval_address (p);
- else
- error ("%s", _(adi_usage));
- int version = 0;
- if (q != NULL) /* parse version tag */
- {
- adi_stat_t ast = get_adi_info (inferior_ptid.pid ());
- version = parse_and_eval_long (q);
- if (version < 0 || version > ast.max_version)
- error (_("Invalid ADI version tag %d"), version);
- }
- do_assign (next_address, cnt, version);
- }
- void _initialize_sparc64_adi_tdep ();
- void
- _initialize_sparc64_adi_tdep ()
- {
- add_basic_prefix_cmd ("adi", class_support,
- _("ADI version related commands."),
- &sparc64adilist, 0, &cmdlist);
- cmd_list_element *adi_examine_cmd
- = add_cmd ("examine", class_support, adi_examine_command,
- _("Examine ADI versions."), &sparc64adilist);
- add_alias_cmd ("x", adi_examine_cmd, no_class, 1, &sparc64adilist);
- add_cmd ("assign", class_support, adi_assign_command,
- _("Assign ADI versions."), &sparc64adilist);
- }
- /* The functions on this page are intended to be used to classify
- function arguments. */
- /* Check whether TYPE is "Integral or Pointer". */
- static int
- sparc64_integral_or_pointer_p (const struct type *type)
- {
- switch (type->code ())
- {
- case TYPE_CODE_INT:
- case TYPE_CODE_BOOL:
- case TYPE_CODE_CHAR:
- case TYPE_CODE_ENUM:
- case TYPE_CODE_RANGE:
- {
- int len = TYPE_LENGTH (type);
- gdb_assert (len == 1 || len == 2 || len == 4 || len == 8);
- }
- return 1;
- case TYPE_CODE_PTR:
- case TYPE_CODE_REF:
- case TYPE_CODE_RVALUE_REF:
- {
- int len = TYPE_LENGTH (type);
- gdb_assert (len == 8);
- }
- return 1;
- default:
- break;
- }
- return 0;
- }
- /* Check whether TYPE is "Floating". */
- static int
- sparc64_floating_p (const struct type *type)
- {
- switch (type->code ())
- {
- case TYPE_CODE_FLT:
- {
- int len = TYPE_LENGTH (type);
- gdb_assert (len == 4 || len == 8 || len == 16);
- }
- return 1;
- default:
- break;
- }
- return 0;
- }
- /* Check whether TYPE is "Complex Floating". */
- static int
- sparc64_complex_floating_p (const struct type *type)
- {
- switch (type->code ())
- {
- case TYPE_CODE_COMPLEX:
- {
- int len = TYPE_LENGTH (type);
- gdb_assert (len == 8 || len == 16 || len == 32);
- }
- return 1;
- default:
- break;
- }
- return 0;
- }
- /* Check whether TYPE is "Structure or Union".
- In terms of Ada subprogram calls, arrays are treated the same as
- struct and union types. So this function also returns non-zero
- for array types. */
- static int
- sparc64_structure_or_union_p (const struct type *type)
- {
- switch (type->code ())
- {
- case TYPE_CODE_STRUCT:
- case TYPE_CODE_UNION:
- case TYPE_CODE_ARRAY:
- return 1;
- default:
- break;
- }
- return 0;
- }
- /* Construct types for ISA-specific registers. */
- static struct type *
- sparc64_pstate_type (struct gdbarch *gdbarch)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (!tdep->sparc64_pstate_type)
- {
- struct type *type;
- type = arch_flags_type (gdbarch, "builtin_type_sparc64_pstate", 64);
- append_flags_type_flag (type, 0, "AG");
- append_flags_type_flag (type, 1, "IE");
- append_flags_type_flag (type, 2, "PRIV");
- append_flags_type_flag (type, 3, "AM");
- append_flags_type_flag (type, 4, "PEF");
- append_flags_type_flag (type, 5, "RED");
- append_flags_type_flag (type, 8, "TLE");
- append_flags_type_flag (type, 9, "CLE");
- append_flags_type_flag (type, 10, "PID0");
- append_flags_type_flag (type, 11, "PID1");
- tdep->sparc64_pstate_type = type;
- }
- return tdep->sparc64_pstate_type;
- }
- static struct type *
- sparc64_ccr_type (struct gdbarch *gdbarch)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (tdep->sparc64_ccr_type == NULL)
- {
- struct type *type;
- type = arch_flags_type (gdbarch, "builtin_type_sparc64_ccr", 64);
- append_flags_type_flag (type, 0, "icc.c");
- append_flags_type_flag (type, 1, "icc.v");
- append_flags_type_flag (type, 2, "icc.z");
- append_flags_type_flag (type, 3, "icc.n");
- append_flags_type_flag (type, 4, "xcc.c");
- append_flags_type_flag (type, 5, "xcc.v");
- append_flags_type_flag (type, 6, "xcc.z");
- append_flags_type_flag (type, 7, "xcc.n");
- tdep->sparc64_ccr_type = type;
- }
- return tdep->sparc64_ccr_type;
- }
- static struct type *
- sparc64_fsr_type (struct gdbarch *gdbarch)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (!tdep->sparc64_fsr_type)
- {
- struct type *type;
- type = arch_flags_type (gdbarch, "builtin_type_sparc64_fsr", 64);
- append_flags_type_flag (type, 0, "NXC");
- append_flags_type_flag (type, 1, "DZC");
- append_flags_type_flag (type, 2, "UFC");
- append_flags_type_flag (type, 3, "OFC");
- append_flags_type_flag (type, 4, "NVC");
- append_flags_type_flag (type, 5, "NXA");
- append_flags_type_flag (type, 6, "DZA");
- append_flags_type_flag (type, 7, "UFA");
- append_flags_type_flag (type, 8, "OFA");
- append_flags_type_flag (type, 9, "NVA");
- append_flags_type_flag (type, 22, "NS");
- append_flags_type_flag (type, 23, "NXM");
- append_flags_type_flag (type, 24, "DZM");
- append_flags_type_flag (type, 25, "UFM");
- append_flags_type_flag (type, 26, "OFM");
- append_flags_type_flag (type, 27, "NVM");
- tdep->sparc64_fsr_type = type;
- }
- return tdep->sparc64_fsr_type;
- }
- static struct type *
- sparc64_fprs_type (struct gdbarch *gdbarch)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- if (!tdep->sparc64_fprs_type)
- {
- struct type *type;
- type = arch_flags_type (gdbarch, "builtin_type_sparc64_fprs", 64);
- append_flags_type_flag (type, 0, "DL");
- append_flags_type_flag (type, 1, "DU");
- append_flags_type_flag (type, 2, "FEF");
- tdep->sparc64_fprs_type = type;
- }
- return tdep->sparc64_fprs_type;
- }
- /* Register information. */
- #define SPARC64_FPU_REGISTERS \
- "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
- "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \
- "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", \
- "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \
- "f32", "f34", "f36", "f38", "f40", "f42", "f44", "f46", \
- "f48", "f50", "f52", "f54", "f56", "f58", "f60", "f62"
- #define SPARC64_CP0_REGISTERS \
- "pc", "npc", \
- /* FIXME: Give "state" a name until we start using register groups. */ \
- "state", \
- "fsr", \
- "fprs", \
- "y"
- static const char * const sparc64_fpu_register_names[] = {
- SPARC64_FPU_REGISTERS
- };
- static const char * const sparc64_cp0_register_names[] = {
- SPARC64_CP0_REGISTERS
- };
- static const char * const sparc64_register_names[] =
- {
- SPARC_CORE_REGISTERS,
- SPARC64_FPU_REGISTERS,
- SPARC64_CP0_REGISTERS
- };
- /* Total number of registers. */
- #define SPARC64_NUM_REGS ARRAY_SIZE (sparc64_register_names)
- /* We provide the aliases %d0..%d62 and %q0..%q60 for the floating
- registers as "psuedo" registers. */
- static const char * const sparc64_pseudo_register_names[] =
- {
- "cwp", "pstate", "asi", "ccr",
- "d0", "d2", "d4", "d6", "d8", "d10", "d12", "d14",
- "d16", "d18", "d20", "d22", "d24", "d26", "d28", "d30",
- "d32", "d34", "d36", "d38", "d40", "d42", "d44", "d46",
- "d48", "d50", "d52", "d54", "d56", "d58", "d60", "d62",
- "q0", "q4", "q8", "q12", "q16", "q20", "q24", "q28",
- "q32", "q36", "q40", "q44", "q48", "q52", "q56", "q60",
- };
- /* Total number of pseudo registers. */
- #define SPARC64_NUM_PSEUDO_REGS ARRAY_SIZE (sparc64_pseudo_register_names)
- /* Return the name of pseudo register REGNUM. */
- static const char *
- sparc64_pseudo_register_name (struct gdbarch *gdbarch, int regnum)
- {
- regnum -= gdbarch_num_regs (gdbarch);
- if (regnum < SPARC64_NUM_PSEUDO_REGS)
- return sparc64_pseudo_register_names[regnum];
- internal_error (__FILE__, __LINE__,
- _("sparc64_pseudo_register_name: bad register number %d"),
- regnum);
- }
- /* Return the name of register REGNUM. */
- static const char *
- sparc64_register_name (struct gdbarch *gdbarch, int regnum)
- {
- if (tdesc_has_registers (gdbarch_target_desc (gdbarch)))
- return tdesc_register_name (gdbarch, regnum);
- if (regnum >= 0 && regnum < gdbarch_num_regs (gdbarch))
- return sparc64_register_names[regnum];
- return sparc64_pseudo_register_name (gdbarch, regnum);
- }
- /* Return the GDB type object for the "standard" data type of data in
- pseudo register REGNUM. */
- static struct type *
- sparc64_pseudo_register_type (struct gdbarch *gdbarch, int regnum)
- {
- regnum -= gdbarch_num_regs (gdbarch);
- if (regnum == SPARC64_CWP_REGNUM)
- return builtin_type (gdbarch)->builtin_int64;
- if (regnum == SPARC64_PSTATE_REGNUM)
- return sparc64_pstate_type (gdbarch);
- if (regnum == SPARC64_ASI_REGNUM)
- return builtin_type (gdbarch)->builtin_int64;
- if (regnum == SPARC64_CCR_REGNUM)
- return sparc64_ccr_type (gdbarch);
- if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D62_REGNUM)
- return builtin_type (gdbarch)->builtin_double;
- if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q60_REGNUM)
- return builtin_type (gdbarch)->builtin_long_double;
- internal_error (__FILE__, __LINE__,
- _("sparc64_pseudo_register_type: bad register number %d"),
- regnum);
- }
- /* Return the GDB type object for the "standard" data type of data in
- register REGNUM. */
- static struct type *
- sparc64_register_type (struct gdbarch *gdbarch, int regnum)
- {
- if (tdesc_has_registers (gdbarch_target_desc (gdbarch)))
- return tdesc_register_type (gdbarch, regnum);
- /* Raw registers. */
- if (regnum == SPARC_SP_REGNUM || regnum == SPARC_FP_REGNUM)
- return builtin_type (gdbarch)->builtin_data_ptr;
- if (regnum >= SPARC_G0_REGNUM && regnum <= SPARC_I7_REGNUM)
- return builtin_type (gdbarch)->builtin_int64;
- if (regnum >= SPARC_F0_REGNUM && regnum <= SPARC_F31_REGNUM)
- return builtin_type (gdbarch)->builtin_float;
- if (regnum >= SPARC64_F32_REGNUM && regnum <= SPARC64_F62_REGNUM)
- return builtin_type (gdbarch)->builtin_double;
- if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM)
- return builtin_type (gdbarch)->builtin_func_ptr;
- /* This raw register contains the contents of %cwp, %pstate, %asi
- and %ccr as laid out in a %tstate register. */
- if (regnum == SPARC64_STATE_REGNUM)
- return builtin_type (gdbarch)->builtin_int64;
- if (regnum == SPARC64_FSR_REGNUM)
- return sparc64_fsr_type (gdbarch);
- if (regnum == SPARC64_FPRS_REGNUM)
- return sparc64_fprs_type (gdbarch);
- /* "Although Y is a 64-bit register, its high-order 32 bits are
- reserved and always read as 0." */
- if (regnum == SPARC64_Y_REGNUM)
- return builtin_type (gdbarch)->builtin_int64;
- /* Pseudo registers. */
- if (regnum >= gdbarch_num_regs (gdbarch))
- return sparc64_pseudo_register_type (gdbarch, regnum);
- internal_error (__FILE__, __LINE__, _("invalid regnum"));
- }
- static enum register_status
- sparc64_pseudo_register_read (struct gdbarch *gdbarch,
- readable_regcache *regcache,
- int regnum, gdb_byte *buf)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- enum register_status status;
- regnum -= gdbarch_num_regs (gdbarch);
- if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D30_REGNUM)
- {
- regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC64_D0_REGNUM);
- status = regcache->raw_read (regnum, buf);
- if (status == REG_VALID)
- status = regcache->raw_read (regnum + 1, buf + 4);
- return status;
- }
- else if (regnum >= SPARC64_D32_REGNUM && regnum <= SPARC64_D62_REGNUM)
- {
- regnum = SPARC64_F32_REGNUM + (regnum - SPARC64_D32_REGNUM);
- return regcache->raw_read (regnum, buf);
- }
- else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q28_REGNUM)
- {
- regnum = SPARC_F0_REGNUM + 4 * (regnum - SPARC64_Q0_REGNUM);
- status = regcache->raw_read (regnum, buf);
- if (status == REG_VALID)
- status = regcache->raw_read (regnum + 1, buf + 4);
- if (status == REG_VALID)
- status = regcache->raw_read (regnum + 2, buf + 8);
- if (status == REG_VALID)
- status = regcache->raw_read (regnum + 3, buf + 12);
- return status;
- }
- else if (regnum >= SPARC64_Q32_REGNUM && regnum <= SPARC64_Q60_REGNUM)
- {
- regnum = SPARC64_F32_REGNUM + 2 * (regnum - SPARC64_Q32_REGNUM);
- status = regcache->raw_read (regnum, buf);
- if (status == REG_VALID)
- status = regcache->raw_read (regnum + 1, buf + 8);
- return status;
- }
- else if (regnum == SPARC64_CWP_REGNUM
- || regnum == SPARC64_PSTATE_REGNUM
- || regnum == SPARC64_ASI_REGNUM
- || regnum == SPARC64_CCR_REGNUM)
- {
- ULONGEST state;
- status = regcache->raw_read (SPARC64_STATE_REGNUM, &state);
- if (status != REG_VALID)
- return status;
- switch (regnum)
- {
- case SPARC64_CWP_REGNUM:
- state = (state >> 0) & ((1 << 5) - 1);
- break;
- case SPARC64_PSTATE_REGNUM:
- state = (state >> 8) & ((1 << 12) - 1);
- break;
- case SPARC64_ASI_REGNUM:
- state = (state >> 24) & ((1 << 8) - 1);
- break;
- case SPARC64_CCR_REGNUM:
- state = (state >> 32) & ((1 << 8) - 1);
- break;
- }
- store_unsigned_integer (buf, 8, byte_order, state);
- }
- return REG_VALID;
- }
- static void
- sparc64_pseudo_register_write (struct gdbarch *gdbarch,
- struct regcache *regcache,
- int regnum, const gdb_byte *buf)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- regnum -= gdbarch_num_regs (gdbarch);
- if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D30_REGNUM)
- {
- regnum = SPARC_F0_REGNUM + 2 * (regnum - SPARC64_D0_REGNUM);
- regcache->raw_write (regnum, buf);
- regcache->raw_write (regnum + 1, buf + 4);
- }
- else if (regnum >= SPARC64_D32_REGNUM && regnum <= SPARC64_D62_REGNUM)
- {
- regnum = SPARC64_F32_REGNUM + (regnum - SPARC64_D32_REGNUM);
- regcache->raw_write (regnum, buf);
- }
- else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q28_REGNUM)
- {
- regnum = SPARC_F0_REGNUM + 4 * (regnum - SPARC64_Q0_REGNUM);
- regcache->raw_write (regnum, buf);
- regcache->raw_write (regnum + 1, buf + 4);
- regcache->raw_write (regnum + 2, buf + 8);
- regcache->raw_write (regnum + 3, buf + 12);
- }
- else if (regnum >= SPARC64_Q32_REGNUM && regnum <= SPARC64_Q60_REGNUM)
- {
- regnum = SPARC64_F32_REGNUM + 2 * (regnum - SPARC64_Q32_REGNUM);
- regcache->raw_write (regnum, buf);
- regcache->raw_write (regnum + 1, buf + 8);
- }
- else if (regnum == SPARC64_CWP_REGNUM
- || regnum == SPARC64_PSTATE_REGNUM
- || regnum == SPARC64_ASI_REGNUM
- || regnum == SPARC64_CCR_REGNUM)
- {
- ULONGEST state, bits;
- regcache_raw_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state);
- bits = extract_unsigned_integer (buf, 8, byte_order);
- switch (regnum)
- {
- case SPARC64_CWP_REGNUM:
- state |= ((bits & ((1 << 5) - 1)) << 0);
- break;
- case SPARC64_PSTATE_REGNUM:
- state |= ((bits & ((1 << 12) - 1)) << 8);
- break;
- case SPARC64_ASI_REGNUM:
- state |= ((bits & ((1 << 8) - 1)) << 24);
- break;
- case SPARC64_CCR_REGNUM:
- state |= ((bits & ((1 << 8) - 1)) << 32);
- break;
- }
- regcache_raw_write_unsigned (regcache, SPARC64_STATE_REGNUM, state);
- }
- }
- /* Return PC of first real instruction of the function starting at
- START_PC. */
- static CORE_ADDR
- sparc64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
- {
- struct symtab_and_line sal;
- CORE_ADDR func_start, func_end;
- struct sparc_frame_cache cache;
- /* This is the preferred method, find the end of the prologue by
- using the debugging information. */
- if (find_pc_partial_function (start_pc, NULL, &func_start, &func_end))
- {
- sal = find_pc_line (func_start, 0);
- if (sal.end < func_end
- && start_pc <= sal.end)
- return sal.end;
- }
- return sparc_analyze_prologue (gdbarch, start_pc, 0xffffffffffffffffULL,
- &cache);
- }
- /* Normal frames. */
- static struct sparc_frame_cache *
- sparc64_frame_cache (struct frame_info *this_frame, void **this_cache)
- {
- return sparc_frame_cache (this_frame, this_cache);
- }
- static void
- sparc64_frame_this_id (struct frame_info *this_frame, void **this_cache,
- struct frame_id *this_id)
- {
- struct sparc_frame_cache *cache =
- sparc64_frame_cache (this_frame, this_cache);
- /* This marks the outermost frame. */
- if (cache->base == 0)
- return;
- (*this_id) = frame_id_build (cache->base, cache->pc);
- }
- static struct value *
- sparc64_frame_prev_register (struct frame_info *this_frame, void **this_cache,
- int regnum)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- struct sparc_frame_cache *cache =
- sparc64_frame_cache (this_frame, this_cache);
- if (regnum == SPARC64_PC_REGNUM || regnum == SPARC64_NPC_REGNUM)
- {
- CORE_ADDR pc = (regnum == SPARC64_NPC_REGNUM) ? 4 : 0;
- regnum =
- (cache->copied_regs_mask & 0x80) ? SPARC_I7_REGNUM : SPARC_O7_REGNUM;
- pc += get_frame_register_unsigned (this_frame, regnum) + 8;
- return frame_unwind_got_constant (this_frame, regnum, pc);
- }
- /* Handle StackGhost. */
- {
- ULONGEST wcookie = sparc_fetch_wcookie (gdbarch);
- if (wcookie != 0 && !cache->frameless_p && regnum == SPARC_I7_REGNUM)
- {
- CORE_ADDR addr = cache->base + (regnum - SPARC_L0_REGNUM) * 8;
- ULONGEST i7;
- /* Read the value in from memory. */
- i7 = get_frame_memory_unsigned (this_frame, addr, 8);
- return frame_unwind_got_constant (this_frame, regnum, i7 ^ wcookie);
- }
- }
- /* The previous frame's `local' and `in' registers may have been saved
- in the register save area. */
- if (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM
- && (cache->saved_regs_mask & (1 << (regnum - SPARC_L0_REGNUM))))
- {
- CORE_ADDR addr = cache->base + (regnum - SPARC_L0_REGNUM) * 8;
- return frame_unwind_got_memory (this_frame, regnum, addr);
- }
- /* The previous frame's `out' registers may be accessible as the current
- frame's `in' registers. */
- if (regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM
- && (cache->copied_regs_mask & (1 << (regnum - SPARC_O0_REGNUM))))
- regnum += (SPARC_I0_REGNUM - SPARC_O0_REGNUM);
- return frame_unwind_got_register (this_frame, regnum, regnum);
- }
- static const struct frame_unwind sparc64_frame_unwind =
- {
- "sparc64 prologue",
- NORMAL_FRAME,
- default_frame_unwind_stop_reason,
- sparc64_frame_this_id,
- sparc64_frame_prev_register,
- NULL,
- default_frame_sniffer
- };
- static CORE_ADDR
- sparc64_frame_base_address (struct frame_info *this_frame, void **this_cache)
- {
- struct sparc_frame_cache *cache =
- sparc64_frame_cache (this_frame, this_cache);
- return cache->base;
- }
- static const struct frame_base sparc64_frame_base =
- {
- &sparc64_frame_unwind,
- sparc64_frame_base_address,
- sparc64_frame_base_address,
- sparc64_frame_base_address
- };
- /* Check whether TYPE must be 16-byte aligned. */
- static int
- sparc64_16_byte_align_p (struct type *type)
- {
- if (type->code () == TYPE_CODE_ARRAY)
- {
- struct type *t = check_typedef (TYPE_TARGET_TYPE (type));
- if (sparc64_floating_p (t))
- return 1;
- }
- if (sparc64_floating_p (type) && TYPE_LENGTH (type) == 16)
- return 1;
- if (sparc64_structure_or_union_p (type))
- {
- int i;
- for (i = 0; i < type->num_fields (); i++)
- {
- struct type *subtype = check_typedef (type->field (i).type ());
- if (sparc64_16_byte_align_p (subtype))
- return 1;
- }
- }
- return 0;
- }
- /* Store floating fields of element ELEMENT of an "parameter array"
- that has type TYPE and is stored at BITPOS in VALBUF in the
- appropriate registers of REGCACHE. This function can be called
- recursively and therefore handles floating types in addition to
- structures. */
- static void
- sparc64_store_floating_fields (struct regcache *regcache, struct type *type,
- const gdb_byte *valbuf, int element, int bitpos)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- int len = TYPE_LENGTH (type);
- gdb_assert (element < 16);
- if (type->code () == TYPE_CODE_ARRAY)
- {
- gdb_byte buf[8];
- int regnum = SPARC_F0_REGNUM + element * 2 + bitpos / 32;
- valbuf += bitpos / 8;
- if (len < 8)
- {
- memset (buf, 0, 8 - len);
- memcpy (buf + 8 - len, valbuf, len);
- valbuf = buf;
- len = 8;
- }
- for (int n = 0; n < (len + 3) / 4; n++)
- regcache->cooked_write (regnum + n, valbuf + n * 4);
- }
- else if (sparc64_floating_p (type)
- || (sparc64_complex_floating_p (type) && len <= 16))
- {
- int regnum;
- if (len == 16)
- {
- gdb_assert (bitpos == 0);
- gdb_assert ((element % 2) == 0);
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_Q0_REGNUM + element / 2;
- regcache->cooked_write (regnum, valbuf);
- }
- else if (len == 8)
- {
- gdb_assert (bitpos == 0 || bitpos == 64);
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_D0_REGNUM
- + element + bitpos / 64;
- regcache->cooked_write (regnum, valbuf + (bitpos / 8));
- }
- else
- {
- gdb_assert (len == 4);
- gdb_assert (bitpos % 32 == 0 && bitpos >= 0 && bitpos < 128);
- regnum = SPARC_F0_REGNUM + element * 2 + bitpos / 32;
- regcache->cooked_write (regnum, valbuf + (bitpos / 8));
- }
- }
- else if (sparc64_structure_or_union_p (type))
- {
- int i;
- for (i = 0; i < type->num_fields (); i++)
- {
- struct type *subtype = check_typedef (type->field (i).type ());
- int subpos = bitpos + type->field (i).loc_bitpos ();
- sparc64_store_floating_fields (regcache, subtype, valbuf,
- element, subpos);
- }
- /* GCC has an interesting bug. If TYPE is a structure that has
- a single `float' member, GCC doesn't treat it as a structure
- at all, but rather as an ordinary `float' argument. This
- argument will be stored in %f1, as required by the psABI.
- However, as a member of a structure the psABI requires it to
- be stored in %f0. This bug is present in GCC 3.3.2, but
- probably in older releases to. To appease GCC, if a
- structure has only a single `float' member, we store its
- value in %f1 too (we already have stored in %f0). */
- if (type->num_fields () == 1)
- {
- struct type *subtype = check_typedef (type->field (0).type ());
- if (sparc64_floating_p (subtype) && TYPE_LENGTH (subtype) == 4)
- regcache->cooked_write (SPARC_F1_REGNUM, valbuf);
- }
- }
- }
- /* Fetch floating fields from a variable of type TYPE from the
- appropriate registers for BITPOS in REGCACHE and store it at BITPOS
- in VALBUF. This function can be called recursively and therefore
- handles floating types in addition to structures. */
- static void
- sparc64_extract_floating_fields (struct regcache *regcache, struct type *type,
- gdb_byte *valbuf, int bitpos)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- if (type->code () == TYPE_CODE_ARRAY)
- {
- int len = TYPE_LENGTH (type);
- int regnum = SPARC_F0_REGNUM + bitpos / 32;
- valbuf += bitpos / 8;
- if (len < 4)
- {
- gdb_byte buf[4];
- regcache->cooked_read (regnum, buf);
- memcpy (valbuf, buf + 4 - len, len);
- }
- else
- for (int i = 0; i < (len + 3) / 4; i++)
- regcache->cooked_read (regnum + i, valbuf + i * 4);
- }
- else if (sparc64_floating_p (type))
- {
- int len = TYPE_LENGTH (type);
- int regnum;
- if (len == 16)
- {
- gdb_assert (bitpos == 0 || bitpos == 128);
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_Q0_REGNUM
- + bitpos / 128;
- regcache->cooked_read (regnum, valbuf + (bitpos / 8));
- }
- else if (len == 8)
- {
- gdb_assert (bitpos % 64 == 0 && bitpos >= 0 && bitpos < 256);
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_D0_REGNUM + bitpos / 64;
- regcache->cooked_read (regnum, valbuf + (bitpos / 8));
- }
- else
- {
- gdb_assert (len == 4);
- gdb_assert (bitpos % 32 == 0 && bitpos >= 0 && bitpos < 256);
- regnum = SPARC_F0_REGNUM + bitpos / 32;
- regcache->cooked_read (regnum, valbuf + (bitpos / 8));
- }
- }
- else if (sparc64_structure_or_union_p (type))
- {
- int i;
- for (i = 0; i < type->num_fields (); i++)
- {
- struct type *subtype = check_typedef (type->field (i).type ());
- int subpos = bitpos + type->field (i).loc_bitpos ();
- sparc64_extract_floating_fields (regcache, subtype, valbuf, subpos);
- }
- }
- }
- /* Store the NARGS arguments ARGS and STRUCT_ADDR (if STRUCT_RETURN is
- non-zero) in REGCACHE and on the stack (starting from address SP). */
- static CORE_ADDR
- sparc64_store_arguments (struct regcache *regcache, int nargs,
- struct value **args, CORE_ADDR sp,
- function_call_return_method return_method,
- CORE_ADDR struct_addr)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- /* Number of extended words in the "parameter array". */
- int num_elements = 0;
- int element = 0;
- int i;
- /* Take BIAS into account. */
- sp += BIAS;
- /* First we calculate the number of extended words in the "parameter
- array". While doing so we also convert some of the arguments. */
- if (return_method == return_method_struct)
- num_elements++;
- for (i = 0; i < nargs; i++)
- {
- struct type *type = value_type (args[i]);
- int len = TYPE_LENGTH (type);
- if (sparc64_structure_or_union_p (type)
- || (sparc64_complex_floating_p (type) && len == 32))
- {
- /* Structure or Union arguments. */
- if (len <= 16)
- {
- if (num_elements % 2 && sparc64_16_byte_align_p (type))
- num_elements++;
- num_elements += ((len + 7) / 8);
- }
- else
- {
- /* The psABI says that "Structures or unions larger than
- sixteen bytes are copied by the caller and passed
- indirectly; the caller will pass the address of a
- correctly aligned structure value. This sixty-four
- bit address will occupy one word in the parameter
- array, and may be promoted to an %o register like any
- other pointer value." Allocate memory for these
- values on the stack. */
- sp -= len;
- /* Use 16-byte alignment for these values. That's
- always correct, and wasting a few bytes shouldn't be
- a problem. */
- sp &= ~0xf;
- write_memory (sp, value_contents (args[i]).data (), len);
- args[i] = value_from_pointer (lookup_pointer_type (type), sp);
- num_elements++;
- }
- }
- else if (sparc64_floating_p (type) || sparc64_complex_floating_p (type))
- {
- /* Floating arguments. */
- if (len == 16)
- {
- /* The psABI says that "Each quad-precision parameter
- value will be assigned to two extended words in the
- parameter array. */
- num_elements += 2;
- /* The psABI says that "Long doubles must be
- quad-aligned, and thus a hole might be introduced
- into the parameter array to force alignment." Skip
- an element if necessary. */
- if ((num_elements % 2) && sparc64_16_byte_align_p (type))
- num_elements++;
- }
- else
- num_elements++;
- }
- else
- {
- /* Integral and pointer arguments. */
- gdb_assert (sparc64_integral_or_pointer_p (type));
- /* The psABI says that "Each argument value of integral type
- smaller than an extended word will be widened by the
- caller to an extended word according to the signed-ness
- of the argument type." */
- if (len < 8)
- args[i] = value_cast (builtin_type (gdbarch)->builtin_int64,
- args[i]);
- num_elements++;
- }
- }
- /* Allocate the "parameter array". */
- sp -= num_elements * 8;
- /* The psABI says that "Every stack frame must be 16-byte aligned." */
- sp &= ~0xf;
- /* Now we store the arguments in to the "parameter array". Some
- Integer or Pointer arguments and Structure or Union arguments
- will be passed in %o registers. Some Floating arguments and
- floating members of structures are passed in floating-point
- registers. However, for functions with variable arguments,
- floating arguments are stored in an %0 register, and for
- functions without a prototype floating arguments are stored in
- both a floating-point and an %o registers, or a floating-point
- register and memory. To simplify the logic here we always pass
- arguments in memory, an %o register, and a floating-point
- register if appropriate. This should be no problem since the
- contents of any unused memory or registers in the "parameter
- array" are undefined. */
- if (return_method == return_method_struct)
- {
- regcache_cooked_write_unsigned (regcache, SPARC_O0_REGNUM, struct_addr);
- element++;
- }
- for (i = 0; i < nargs; i++)
- {
- const gdb_byte *valbuf = value_contents (args[i]).data ();
- struct type *type = value_type (args[i]);
- int len = TYPE_LENGTH (type);
- int regnum = -1;
- gdb_byte buf[16];
- if (sparc64_structure_or_union_p (type)
- || (sparc64_complex_floating_p (type) && len == 32))
- {
- /* Structure, Union or long double Complex arguments. */
- gdb_assert (len <= 16);
- memset (buf, 0, sizeof (buf));
- memcpy (buf, valbuf, len);
- valbuf = buf;
- if (element % 2 && sparc64_16_byte_align_p (type))
- element++;
- if (element < 6)
- {
- regnum = SPARC_O0_REGNUM + element;
- if (len > 8 && element < 5)
- regcache->cooked_write (regnum + 1, valbuf + 8);
- }
- if (element < 16)
- sparc64_store_floating_fields (regcache, type, valbuf, element, 0);
- }
- else if (sparc64_complex_floating_p (type))
- {
- /* Float Complex or double Complex arguments. */
- if (element < 16)
- {
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_D0_REGNUM + element;
- if (len == 16)
- {
- if (regnum < gdbarch_num_regs (gdbarch) + SPARC64_D30_REGNUM)
- regcache->cooked_write (regnum + 1, valbuf + 8);
- if (regnum < gdbarch_num_regs (gdbarch) + SPARC64_D10_REGNUM)
- regcache->cooked_write (SPARC_O0_REGNUM + element + 1,
- valbuf + 8);
- }
- }
- }
- else if (sparc64_floating_p (type))
- {
- /* Floating arguments. */
- if (len == 16)
- {
- if (element % 2)
- element++;
- if (element < 16)
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_Q0_REGNUM
- + element / 2;
- }
- else if (len == 8)
- {
- if (element < 16)
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_D0_REGNUM
- + element;
- }
- else if (len == 4)
- {
- /* The psABI says "Each single-precision parameter value
- will be assigned to one extended word in the
- parameter array, and right-justified within that
- word; the left half (even float register) is
- undefined." Even though the psABI says that "the
- left half is undefined", set it to zero here. */
- memset (buf, 0, 4);
- memcpy (buf + 4, valbuf, 4);
- valbuf = buf;
- len = 8;
- if (element < 16)
- regnum = gdbarch_num_regs (gdbarch) + SPARC64_D0_REGNUM
- + element;
- }
- }
- else
- {
- /* Integral and pointer arguments. */
- gdb_assert (len == 8);
- if (element < 6)
- regnum = SPARC_O0_REGNUM + element;
- }
- if (regnum != -1)
- {
- regcache->cooked_write (regnum, valbuf);
- /* If we're storing the value in a floating-point register,
- also store it in the corresponding %0 register(s). */
- if (regnum >= gdbarch_num_regs (gdbarch))
- {
- regnum -= gdbarch_num_regs (gdbarch);
- if (regnum >= SPARC64_D0_REGNUM && regnum <= SPARC64_D10_REGNUM)
- {
- gdb_assert (element < 6);
- regnum = SPARC_O0_REGNUM + element;
- regcache->cooked_write (regnum, valbuf);
- }
- else if (regnum >= SPARC64_Q0_REGNUM && regnum <= SPARC64_Q8_REGNUM)
- {
- gdb_assert (element < 5);
- regnum = SPARC_O0_REGNUM + element;
- regcache->cooked_write (regnum, valbuf);
- regcache->cooked_write (regnum + 1, valbuf + 8);
- }
- }
- }
- /* Always store the argument in memory. */
- write_memory (sp + element * 8, valbuf, len);
- element += ((len + 7) / 8);
- }
- gdb_assert (element == num_elements);
- /* Take BIAS into account. */
- sp -= BIAS;
- return sp;
- }
- static CORE_ADDR
- sparc64_frame_align (struct gdbarch *gdbarch, CORE_ADDR address)
- {
- /* The ABI requires 16-byte alignment. */
- return address & ~0xf;
- }
- static CORE_ADDR
- sparc64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
- struct regcache *regcache, CORE_ADDR bp_addr,
- int nargs, struct value **args, CORE_ADDR sp,
- function_call_return_method return_method,
- CORE_ADDR struct_addr)
- {
- /* Set return address. */
- regcache_cooked_write_unsigned (regcache, SPARC_O7_REGNUM, bp_addr - 8);
- /* Set up function arguments. */
- sp = sparc64_store_arguments (regcache, nargs, args, sp, return_method,
- struct_addr);
- /* Allocate the register save area. */
- sp -= 16 * 8;
- /* Stack should be 16-byte aligned at this point. */
- gdb_assert ((sp + BIAS) % 16 == 0);
- /* Finally, update the stack pointer. */
- regcache_cooked_write_unsigned (regcache, SPARC_SP_REGNUM, sp);
- return sp + BIAS;
- }
- /* Extract from an array REGBUF containing the (raw) register state, a
- function return value of TYPE, and copy that into VALBUF. */
- static void
- sparc64_extract_return_value (struct type *type, struct regcache *regcache,
- gdb_byte *valbuf)
- {
- int len = TYPE_LENGTH (type);
- gdb_byte buf[32];
- int i;
- if (sparc64_structure_or_union_p (type))
- {
- /* Structure or Union return values. */
- gdb_assert (len <= 32);
- for (i = 0; i < ((len + 7) / 8); i++)
- regcache->cooked_read (SPARC_O0_REGNUM + i, buf + i * 8);
- if (type->code () != TYPE_CODE_UNION)
- sparc64_extract_floating_fields (regcache, type, buf, 0);
- memcpy (valbuf, buf, len);
- }
- else if (sparc64_floating_p (type) || sparc64_complex_floating_p (type))
- {
- /* Floating return values. */
- for (i = 0; i < len / 4; i++)
- regcache->cooked_read (SPARC_F0_REGNUM + i, buf + i * 4);
- memcpy (valbuf, buf, len);
- }
- else if (type->code () == TYPE_CODE_ARRAY)
- {
- /* Small arrays are returned the same way as small structures. */
- gdb_assert (len <= 32);
- for (i = 0; i < ((len + 7) / 8); i++)
- regcache->cooked_read (SPARC_O0_REGNUM + i, buf + i * 8);
- memcpy (valbuf, buf, len);
- }
- else
- {
- /* Integral and pointer return values. */
- gdb_assert (sparc64_integral_or_pointer_p (type));
- /* Just stripping off any unused bytes should preserve the
- signed-ness just fine. */
- regcache->cooked_read (SPARC_O0_REGNUM, buf);
- memcpy (valbuf, buf + 8 - len, len);
- }
- }
- /* Write into the appropriate registers a function return value stored
- in VALBUF of type TYPE. */
- static void
- sparc64_store_return_value (struct type *type, struct regcache *regcache,
- const gdb_byte *valbuf)
- {
- int len = TYPE_LENGTH (type);
- gdb_byte buf[16];
- int i;
- if (sparc64_structure_or_union_p (type))
- {
- /* Structure or Union return values. */
- gdb_assert (len <= 32);
- /* Simplify matters by storing the complete value (including
- floating members) into %o0 and %o1. Floating members are
- also store in the appropriate floating-point registers. */
- memset (buf, 0, sizeof (buf));
- memcpy (buf, valbuf, len);
- for (i = 0; i < ((len + 7) / 8); i++)
- regcache->cooked_write (SPARC_O0_REGNUM + i, buf + i * 8);
- if (type->code () != TYPE_CODE_UNION)
- sparc64_store_floating_fields (regcache, type, buf, 0, 0);
- }
- else if (sparc64_floating_p (type) || sparc64_complex_floating_p (type))
- {
- /* Floating return values. */
- memcpy (buf, valbuf, len);
- for (i = 0; i < len / 4; i++)
- regcache->cooked_write (SPARC_F0_REGNUM + i, buf + i * 4);
- }
- else if (type->code () == TYPE_CODE_ARRAY)
- {
- /* Small arrays are returned the same way as small structures. */
- gdb_assert (len <= 32);
- memset (buf, 0, sizeof (buf));
- memcpy (buf, valbuf, len);
- for (i = 0; i < ((len + 7) / 8); i++)
- regcache->cooked_write (SPARC_O0_REGNUM + i, buf + i * 8);
- }
- else
- {
- /* Integral and pointer return values. */
- gdb_assert (sparc64_integral_or_pointer_p (type));
- /* ??? Do we need to do any sign-extension here? */
- memset (buf, 0, 8);
- memcpy (buf + 8 - len, valbuf, len);
- regcache->cooked_write (SPARC_O0_REGNUM, buf);
- }
- }
- static enum return_value_convention
- sparc64_return_value (struct gdbarch *gdbarch, struct value *function,
- struct type *type, struct regcache *regcache,
- gdb_byte *readbuf, const gdb_byte *writebuf)
- {
- if (TYPE_LENGTH (type) > 32)
- return RETURN_VALUE_STRUCT_CONVENTION;
- if (readbuf)
- sparc64_extract_return_value (type, regcache, readbuf);
- if (writebuf)
- sparc64_store_return_value (type, regcache, writebuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- static void
- sparc64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
- struct dwarf2_frame_state_reg *reg,
- struct frame_info *this_frame)
- {
- switch (regnum)
- {
- case SPARC_G0_REGNUM:
- /* Since %g0 is always zero, there is no point in saving it, and
- people will be inclined omit it from the CFI. Make sure we
- don't warn about that. */
- reg->how = DWARF2_FRAME_REG_SAME_VALUE;
- break;
- case SPARC_SP_REGNUM:
- reg->how = DWARF2_FRAME_REG_CFA;
- break;
- case SPARC64_PC_REGNUM:
- reg->how = DWARF2_FRAME_REG_RA_OFFSET;
- reg->loc.offset = 8;
- break;
- case SPARC64_NPC_REGNUM:
- reg->how = DWARF2_FRAME_REG_RA_OFFSET;
- reg->loc.offset = 12;
- break;
- }
- }
- /* sparc64_addr_bits_remove - remove useless address bits */
- static CORE_ADDR
- sparc64_addr_bits_remove (struct gdbarch *gdbarch, CORE_ADDR addr)
- {
- return adi_normalize_address (addr);
- }
- void
- sparc64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- sparc_gdbarch_tdep *tdep = (sparc_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- tdep->pc_regnum = SPARC64_PC_REGNUM;
- tdep->npc_regnum = SPARC64_NPC_REGNUM;
- tdep->fpu_register_names = sparc64_fpu_register_names;
- tdep->fpu_registers_num = ARRAY_SIZE (sparc64_fpu_register_names);
- tdep->cp0_register_names = sparc64_cp0_register_names;
- tdep->cp0_registers_num = ARRAY_SIZE (sparc64_cp0_register_names);
- /* This is what all the fuss is about. */
- set_gdbarch_long_bit (gdbarch, 64);
- set_gdbarch_long_long_bit (gdbarch, 64);
- set_gdbarch_ptr_bit (gdbarch, 64);
- set_gdbarch_wchar_bit (gdbarch, 16);
- set_gdbarch_wchar_signed (gdbarch, 0);
- set_gdbarch_num_regs (gdbarch, SPARC64_NUM_REGS);
- set_gdbarch_register_name (gdbarch, sparc64_register_name);
- set_gdbarch_register_type (gdbarch, sparc64_register_type);
- set_gdbarch_num_pseudo_regs (gdbarch, SPARC64_NUM_PSEUDO_REGS);
- set_tdesc_pseudo_register_name (gdbarch, sparc64_pseudo_register_name);
- set_tdesc_pseudo_register_type (gdbarch, sparc64_pseudo_register_type);
- set_gdbarch_pseudo_register_read (gdbarch, sparc64_pseudo_register_read);
- set_gdbarch_pseudo_register_write (gdbarch, sparc64_pseudo_register_write);
- /* Register numbers of various important registers. */
- set_gdbarch_pc_regnum (gdbarch, SPARC64_PC_REGNUM); /* %pc */
- /* Call dummy code. */
- set_gdbarch_frame_align (gdbarch, sparc64_frame_align);
- set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT);
- set_gdbarch_push_dummy_code (gdbarch, NULL);
- set_gdbarch_push_dummy_call (gdbarch, sparc64_push_dummy_call);
- set_gdbarch_return_value (gdbarch, sparc64_return_value);
- set_gdbarch_stabs_argument_has_addr
- (gdbarch, default_stabs_argument_has_addr);
- set_gdbarch_skip_prologue (gdbarch, sparc64_skip_prologue);
- set_gdbarch_stack_frame_destroyed_p (gdbarch, sparc_stack_frame_destroyed_p);
- /* Hook in the DWARF CFI frame unwinder. */
- dwarf2_frame_set_init_reg (gdbarch, sparc64_dwarf2_frame_init_reg);
- /* FIXME: kettenis/20050423: Don't enable the unwinder until the
- StackGhost issues have been resolved. */
- frame_unwind_append_unwinder (gdbarch, &sparc64_frame_unwind);
- frame_base_set_default (gdbarch, &sparc64_frame_base);
- set_gdbarch_addr_bits_remove (gdbarch, sparc64_addr_bits_remove);
- }
- /* Helper functions for dealing with register sets. */
- #define TSTATE_CWP 0x000000000000001fULL
- #define TSTATE_ICC 0x0000000f00000000ULL
- #define TSTATE_XCC 0x000000f000000000ULL
- #define PSR_S 0x00000080
- #ifndef PSR_ICC
- #define PSR_ICC 0x00f00000
- #endif
- #define PSR_VERS 0x0f000000
- #ifndef PSR_IMPL
- #define PSR_IMPL 0xf0000000
- #endif
- #define PSR_V8PLUS 0xff000000
- #define PSR_XCC 0x000f0000
- void
- sparc64_supply_gregset (const struct sparc_gregmap *gregmap,
- struct regcache *regcache,
- int regnum, const void *gregs)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int sparc32 = (gdbarch_ptr_bit (gdbarch) == 32);
- const gdb_byte *regs = (const gdb_byte *) gregs;
- gdb_byte zero[8] = { 0 };
- int i;
- if (sparc32)
- {
- if (regnum == SPARC32_PSR_REGNUM || regnum == -1)
- {
- int offset = gregmap->r_tstate_offset;
- ULONGEST tstate, psr;
- gdb_byte buf[4];
- tstate = extract_unsigned_integer (regs + offset, 8, byte_order);
- psr = ((tstate & TSTATE_CWP) | PSR_S | ((tstate & TSTATE_ICC) >> 12)
- | ((tstate & TSTATE_XCC) >> 20) | PSR_V8PLUS);
- store_unsigned_integer (buf, 4, byte_order, psr);
- regcache->raw_supply (SPARC32_PSR_REGNUM, buf);
- }
- if (regnum == SPARC32_PC_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC32_PC_REGNUM,
- regs + gregmap->r_pc_offset + 4);
- if (regnum == SPARC32_NPC_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC32_NPC_REGNUM,
- regs + gregmap->r_npc_offset + 4);
- if (regnum == SPARC32_Y_REGNUM || regnum == -1)
- {
- int offset = gregmap->r_y_offset + 8 - gregmap->r_y_size;
- regcache->raw_supply (SPARC32_Y_REGNUM, regs + offset);
- }
- }
- else
- {
- if (regnum == SPARC64_STATE_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC64_STATE_REGNUM,
- regs + gregmap->r_tstate_offset);
- if (regnum == SPARC64_PC_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC64_PC_REGNUM,
- regs + gregmap->r_pc_offset);
- if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC64_NPC_REGNUM,
- regs + gregmap->r_npc_offset);
- if (regnum == SPARC64_Y_REGNUM || regnum == -1)
- {
- gdb_byte buf[8];
- memset (buf, 0, 8);
- memcpy (buf + 8 - gregmap->r_y_size,
- regs + gregmap->r_y_offset, gregmap->r_y_size);
- regcache->raw_supply (SPARC64_Y_REGNUM, buf);
- }
- if ((regnum == SPARC64_FPRS_REGNUM || regnum == -1)
- && gregmap->r_fprs_offset != -1)
- regcache->raw_supply (SPARC64_FPRS_REGNUM,
- regs + gregmap->r_fprs_offset);
- }
- if (regnum == SPARC_G0_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC_G0_REGNUM, &zero);
- if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1)
- {
- int offset = gregmap->r_g1_offset;
- if (sparc32)
- offset += 4;
- for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache->raw_supply (i, regs + offset);
- offset += 8;
- }
- }
- if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1)
- {
- /* Not all of the register set variants include Locals and
- Inputs. For those that don't, we read them off the stack. */
- if (gregmap->r_l0_offset == -1)
- {
- ULONGEST sp;
- regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
- sparc_supply_rwindow (regcache, sp, regnum);
- }
- else
- {
- int offset = gregmap->r_l0_offset;
- if (sparc32)
- offset += 4;
- for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache->raw_supply (i, regs + offset);
- offset += 8;
- }
- }
- }
- }
- void
- sparc64_collect_gregset (const struct sparc_gregmap *gregmap,
- const struct regcache *regcache,
- int regnum, void *gregs)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int sparc32 = (gdbarch_ptr_bit (gdbarch) == 32);
- gdb_byte *regs = (gdb_byte *) gregs;
- int i;
- if (sparc32)
- {
- if (regnum == SPARC32_PSR_REGNUM || regnum == -1)
- {
- int offset = gregmap->r_tstate_offset;
- ULONGEST tstate, psr;
- gdb_byte buf[8];
- tstate = extract_unsigned_integer (regs + offset, 8, byte_order);
- regcache->raw_collect (SPARC32_PSR_REGNUM, buf);
- psr = extract_unsigned_integer (buf, 4, byte_order);
- tstate |= (psr & PSR_ICC) << 12;
- if ((psr & (PSR_VERS | PSR_IMPL)) == PSR_V8PLUS)
- tstate |= (psr & PSR_XCC) << 20;
- store_unsigned_integer (buf, 8, byte_order, tstate);
- memcpy (regs + offset, buf, 8);
- }
- if (regnum == SPARC32_PC_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC32_PC_REGNUM,
- regs + gregmap->r_pc_offset + 4);
- if (regnum == SPARC32_NPC_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC32_NPC_REGNUM,
- regs + gregmap->r_npc_offset + 4);
- if (regnum == SPARC32_Y_REGNUM || regnum == -1)
- {
- int offset = gregmap->r_y_offset + 8 - gregmap->r_y_size;
- regcache->raw_collect (SPARC32_Y_REGNUM, regs + offset);
- }
- }
- else
- {
- if (regnum == SPARC64_STATE_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC64_STATE_REGNUM,
- regs + gregmap->r_tstate_offset);
- if (regnum == SPARC64_PC_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC64_PC_REGNUM,
- regs + gregmap->r_pc_offset);
- if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC64_NPC_REGNUM,
- regs + gregmap->r_npc_offset);
- if (regnum == SPARC64_Y_REGNUM || regnum == -1)
- {
- gdb_byte buf[8];
- regcache->raw_collect (SPARC64_Y_REGNUM, buf);
- memcpy (regs + gregmap->r_y_offset,
- buf + 8 - gregmap->r_y_size, gregmap->r_y_size);
- }
- if ((regnum == SPARC64_FPRS_REGNUM || regnum == -1)
- && gregmap->r_fprs_offset != -1)
- regcache->raw_collect (SPARC64_FPRS_REGNUM,
- regs + gregmap->r_fprs_offset);
- }
- if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1)
- {
- int offset = gregmap->r_g1_offset;
- if (sparc32)
- offset += 4;
- /* %g0 is always zero. */
- for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache->raw_collect (i, regs + offset);
- offset += 8;
- }
- }
- if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1)
- {
- /* Not all of the register set variants include Locals and
- Inputs. For those that don't, we read them off the stack. */
- if (gregmap->r_l0_offset != -1)
- {
- int offset = gregmap->r_l0_offset;
- if (sparc32)
- offset += 4;
- for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache->raw_collect (i, regs + offset);
- offset += 8;
- }
- }
- }
- }
- void
- sparc64_supply_fpregset (const struct sparc_fpregmap *fpregmap,
- struct regcache *regcache,
- int regnum, const void *fpregs)
- {
- int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
- const gdb_byte *regs = (const gdb_byte *) fpregs;
- int i;
- for (i = 0; i < 32; i++)
- {
- if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1)
- regcache->raw_supply (SPARC_F0_REGNUM + i,
- regs + fpregmap->r_f0_offset + (i * 4));
- }
- if (sparc32)
- {
- if (regnum == SPARC32_FSR_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC32_FSR_REGNUM,
- regs + fpregmap->r_fsr_offset);
- }
- else
- {
- for (i = 0; i < 16; i++)
- {
- if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1)
- regcache->raw_supply
- (SPARC64_F32_REGNUM + i,
- regs + fpregmap->r_f0_offset + (32 * 4) + (i * 8));
- }
- if (regnum == SPARC64_FSR_REGNUM || regnum == -1)
- regcache->raw_supply (SPARC64_FSR_REGNUM,
- regs + fpregmap->r_fsr_offset);
- }
- }
- void
- sparc64_collect_fpregset (const struct sparc_fpregmap *fpregmap,
- const struct regcache *regcache,
- int regnum, void *fpregs)
- {
- int sparc32 = (gdbarch_ptr_bit (regcache->arch ()) == 32);
- gdb_byte *regs = (gdb_byte *) fpregs;
- int i;
- for (i = 0; i < 32; i++)
- {
- if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1)
- regcache->raw_collect (SPARC_F0_REGNUM + i,
- regs + fpregmap->r_f0_offset + (i * 4));
- }
- if (sparc32)
- {
- if (regnum == SPARC32_FSR_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC32_FSR_REGNUM,
- regs + fpregmap->r_fsr_offset);
- }
- else
- {
- for (i = 0; i < 16; i++)
- {
- if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1)
- regcache->raw_collect (SPARC64_F32_REGNUM + i,
- (regs + fpregmap->r_f0_offset
- + (32 * 4) + (i * 8)));
- }
- if (regnum == SPARC64_FSR_REGNUM || regnum == -1)
- regcache->raw_collect (SPARC64_FSR_REGNUM,
- regs + fpregmap->r_fsr_offset);
- }
- }
- const struct sparc_fpregmap sparc64_bsd_fpregmap =
- {
- 0 * 8, /* %f0 */
- 32 * 8, /* %fsr */
- };
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