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- /* Target-dependent code for Xilinx MicroBlaze.
- Copyright (C) 2009-2022 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 "dis-asm.h"
- #include "frame.h"
- #include "trad-frame.h"
- #include "symtab.h"
- #include "value.h"
- #include "gdbcmd.h"
- #include "breakpoint.h"
- #include "inferior.h"
- #include "regcache.h"
- #include "target.h"
- #include "frame-base.h"
- #include "frame-unwind.h"
- #include "dwarf2/frame.h"
- #include "osabi.h"
- #include "target-descriptions.h"
- #include "opcodes/microblaze-opcm.h"
- #include "opcodes/microblaze-dis.h"
- #include "microblaze-tdep.h"
- #include "remote.h"
- #include "features/microblaze-with-stack-protect.c"
- #include "features/microblaze.c"
- /* Instruction macros used for analyzing the prologue. */
- /* This set of instruction macros need to be changed whenever the
- prologue generated by the compiler could have more instructions or
- different type of instructions.
- This set also needs to be verified if it is complete. */
- #define IS_RETURN(op) (op == rtsd || op == rtid)
- #define IS_UPDATE_SP(op, rd, ra) \
- ((op == addik || op == addi) && rd == REG_SP && ra == REG_SP)
- #define IS_SPILL_SP(op, rd, ra) \
- ((op == swi || op == sw) && rd == REG_SP && ra == REG_SP)
- #define IS_SPILL_REG(op, rd, ra) \
- ((op == swi || op == sw) && rd != REG_SP && ra == REG_SP)
- #define IS_ALSO_SPILL_REG(op, rd, ra, rb) \
- ((op == swi || op == sw) && rd != REG_SP && ra == 0 && rb == REG_SP)
- #define IS_SETUP_FP(op, ra, rb) \
- ((op == add || op == addik || op == addk) && ra == REG_SP && rb == 0)
- #define IS_SPILL_REG_FP(op, rd, ra, fpregnum) \
- ((op == swi || op == sw) && rd != REG_SP && ra == fpregnum && ra != 0)
- #define IS_SAVE_HIDDEN_PTR(op, rd, ra, rb) \
- ((op == add || op == addik) && ra == MICROBLAZE_FIRST_ARGREG && rb == 0)
- /* The registers of the Xilinx microblaze processor. */
- static const char * const microblaze_register_names[] =
- {
- "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7",
- "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
- "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
- "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31",
- "rpc", "rmsr", "rear", "resr", "rfsr", "rbtr",
- "rpvr0", "rpvr1", "rpvr2", "rpvr3", "rpvr4", "rpvr5", "rpvr6",
- "rpvr7", "rpvr8", "rpvr9", "rpvr10", "rpvr11",
- "redr", "rpid", "rzpr", "rtlbx", "rtlbsx", "rtlblo", "rtlbhi",
- "rslr", "rshr"
- };
- #define MICROBLAZE_NUM_REGS ARRAY_SIZE (microblaze_register_names)
- static unsigned int microblaze_debug_flag = 0;
- #define microblaze_debug(fmt, ...) \
- debug_prefixed_printf_cond_nofunc (microblaze_debug_flag, "MICROBLAZE", \
- fmt, ## __VA_ARGS__)
- /* Return the name of register REGNUM. */
- static const char *
- microblaze_register_name (struct gdbarch *gdbarch, int regnum)
- {
- if (regnum >= 0 && regnum < MICROBLAZE_NUM_REGS)
- return microblaze_register_names[regnum];
- return NULL;
- }
- static struct type *
- microblaze_register_type (struct gdbarch *gdbarch, int regnum)
- {
- if (regnum == MICROBLAZE_SP_REGNUM)
- return builtin_type (gdbarch)->builtin_data_ptr;
- if (regnum == MICROBLAZE_PC_REGNUM)
- return builtin_type (gdbarch)->builtin_func_ptr;
- return builtin_type (gdbarch)->builtin_int;
- }
- /* Fetch the instruction at PC. */
- static unsigned long
- microblaze_fetch_instruction (CORE_ADDR pc)
- {
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
- gdb_byte buf[4];
- /* If we can't read the instruction at PC, return zero. */
- if (target_read_code (pc, buf, sizeof (buf)))
- return 0;
- return extract_unsigned_integer (buf, 4, byte_order);
- }
- constexpr gdb_byte microblaze_break_insn[] = MICROBLAZE_BREAKPOINT;
- typedef BP_MANIPULATION (microblaze_break_insn) microblaze_breakpoint;
- /* Allocate and initialize a frame cache. */
- static struct microblaze_frame_cache *
- microblaze_alloc_frame_cache (void)
- {
- struct microblaze_frame_cache *cache;
- cache = FRAME_OBSTACK_ZALLOC (struct microblaze_frame_cache);
- /* Base address. */
- cache->base = 0;
- cache->pc = 0;
- /* Frameless until proven otherwise. */
- cache->frameless_p = 1;
- return cache;
- }
- /* The base of the current frame is actually in the stack pointer.
- This happens when there is no frame pointer (microblaze ABI does not
- require a frame pointer) or when we're stopped in the prologue or
- epilogue itself. In these cases, microblaze_analyze_prologue will need
- to update fi->frame before returning or analyzing the register
- save instructions. */
- #define MICROBLAZE_MY_FRAME_IN_SP 0x1
- /* The base of the current frame is in a frame pointer register.
- This register is noted in frame_extra_info->fp_regnum.
- Note that the existance of an FP might also indicate that the
- function has called alloca. */
- #define MICROBLAZE_MY_FRAME_IN_FP 0x2
- /* Function prologues on the Xilinx microblaze processors consist of:
- - adjustments to the stack pointer (r1) (addi r1, r1, imm)
- - making a copy of r1 into another register (a "frame" pointer)
- (add r?, r1, r0)
- - store word/multiples that use r1 or the frame pointer as the
- base address (swi r?, r1, imm OR swi r?, fp, imm)
- Note that microblaze really doesn't have a real frame pointer.
- Instead, the compiler may copy the SP into a register (usually
- r19) to act as an arg pointer. For our target-dependent purposes,
- the frame info's "frame" member will be the beginning of the
- frame. The SP could, in fact, point below this.
- The prologue ends when an instruction fails to meet either of
- these criteria. */
- /* Analyze the prologue to determine where registers are saved,
- the end of the prologue, etc. Return the address of the first line
- of "real" code (i.e., the end of the prologue). */
- static CORE_ADDR
- microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
- CORE_ADDR current_pc,
- struct microblaze_frame_cache *cache)
- {
- const char *name;
- CORE_ADDR func_addr, func_end, addr, stop, prologue_end_addr = 0;
- unsigned long insn;
- int rd, ra, rb, imm;
- enum microblaze_instr op;
- int save_hidden_pointer_found = 0;
- int non_stack_instruction_found = 0;
- /* Find the start of this function. */
- find_pc_partial_function (pc, &name, &func_addr, &func_end);
- if (func_addr < pc)
- pc = func_addr;
- if (current_pc < pc)
- return current_pc;
- /* Initialize info about frame. */
- cache->framesize = 0;
- cache->fp_regnum = MICROBLAZE_SP_REGNUM;
- cache->frameless_p = 1;
- /* Start decoding the prologue. We start by checking two special cases:
- 1. We're about to return
- 2. We're at the first insn of the prologue.
- If we're about to return, our frame has already been deallocated.
- If we are stopped at the first instruction of a prologue,
- then our frame has not yet been set up. */
- /* Get the first insn from memory. */
- insn = microblaze_fetch_instruction (pc);
- op = microblaze_decode_insn (insn, &rd, &ra, &rb, &imm);
- if (IS_RETURN(op))
- return pc;
- /* Start at beginning of function and analyze until we get to the
- current pc, or the end of the function, whichever is first. */
- stop = (current_pc < func_end ? current_pc : func_end);
- microblaze_debug ("Scanning prologue: name=%s, func_addr=%s, stop=%s\n",
- name, paddress (gdbarch, func_addr),
- paddress (gdbarch, stop));
- for (addr = func_addr; addr < stop; addr += INST_WORD_SIZE)
- {
- insn = microblaze_fetch_instruction (addr);
- op = microblaze_decode_insn (insn, &rd, &ra, &rb, &imm);
- microblaze_debug ("%s %08lx\n", paddress (gdbarch, pc), insn);
- /* This code is very sensitive to what functions are present in the
- prologue. It assumes that the (addi, addik, swi, sw) can be the
- only instructions in the prologue. */
- if (IS_UPDATE_SP(op, rd, ra))
- {
- microblaze_debug ("got addi r1,r1,%d; contnuing\n", imm);
- if (cache->framesize)
- break; /* break if framesize already computed. */
- cache->framesize = -imm; /* stack grows towards low memory. */
- cache->frameless_p = 0; /* Frame found. */
- save_hidden_pointer_found = 0;
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_SPILL_SP(op, rd, ra))
- {
- /* Spill stack pointer. */
- cache->register_offsets[rd] = imm; /* SP spilled before updating. */
- microblaze_debug ("swi r1 r1 %d, continuing\n", imm);
- save_hidden_pointer_found = 0;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_SPILL_REG(op, rd, ra))
- {
- /* Spill register. */
- cache->register_offsets[rd] = imm - cache->framesize;
- microblaze_debug ("swi %d r1 %d, continuing\n", rd, imm);
- save_hidden_pointer_found = 0;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_ALSO_SPILL_REG(op, rd, ra, rb))
- {
- /* Spill register. */
- cache->register_offsets[rd] = 0 - cache->framesize;
- microblaze_debug ("sw %d r0 r1, continuing\n", rd);
- save_hidden_pointer_found = 0;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_SETUP_FP(op, ra, rb))
- {
- /* We have a frame pointer. Note the register which is
- acting as the frame pointer. */
- cache->fp_regnum = rd;
- microblaze_debug ("Found a frame pointer: r%d\n", cache->fp_regnum);
- save_hidden_pointer_found = 0;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_SPILL_REG_FP(op, rd, ra, cache->fp_regnum))
- {
- /* reg spilled after updating. */
- cache->register_offsets[rd] = imm - cache->framesize;
- microblaze_debug ("swi %d %d %d, continuing\n", rd, ra, imm);
- save_hidden_pointer_found = 0;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- else if (IS_SAVE_HIDDEN_PTR(op, rd, ra, rb))
- {
- /* If the first argument is a hidden pointer to the area where the
- return structure is to be saved, then it is saved as part of the
- prologue. */
- microblaze_debug ("add %d %d %d, continuing\n", rd, ra, rb);
- save_hidden_pointer_found = 1;
- if (!cache->framesize)
- non_stack_instruction_found = 0;
- continue;
- }
- /* As a result of the modification in the next step where we continue
- to analyze the prologue till we reach a control flow instruction,
- we need another variable to store when exactly a non-stack
- instruction was encountered, which is the current definition
- of a prologue. */
- if (!non_stack_instruction_found)
- prologue_end_addr = addr;
- non_stack_instruction_found = 1;
- /* When optimizations are enabled, it is not guaranteed that prologue
- instructions are not mixed in with other instructions from the
- program. Some programs show this behavior at -O2. This can be
- avoided by adding -fno-schedule-insns2 switch as of now (edk 8.1)
- In such cases, we scan the function until we see the first control
- instruction. */
- {
- unsigned ctrl_op = (unsigned)insn >> 26;
- /* continue if not control flow (branch, return). */
- if (ctrl_op != 0x26 && ctrl_op != 0x27 && ctrl_op != 0x2d
- && ctrl_op != 0x2e && ctrl_op != 0x2f)
- continue;
- else if (ctrl_op == 0x2c)
- continue; /* continue if imm. */
- }
- /* This is not a prologue insn, so stop here. */
- microblaze_debug ("insn is not a prologue insn -- ending scan\n");
- break;
- }
- microblaze_debug ("done analyzing prologue\n");
- microblaze_debug ("prologue end = 0x%x\n", (int) addr);
- /* If the last instruction was an add rd, r5, r0 then don't count it as
- part of the prologue. */
- if (save_hidden_pointer_found)
- prologue_end_addr -= INST_WORD_SIZE;
- return prologue_end_addr;
- }
- static CORE_ADDR
- microblaze_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
- {
- gdb_byte buf[4];
- CORE_ADDR pc;
- frame_unwind_register (next_frame, MICROBLAZE_PC_REGNUM, buf);
- pc = extract_typed_address (buf, builtin_type (gdbarch)->builtin_func_ptr);
- /* For sentinel frame, return address is actual PC. For other frames,
- return address is pc+8. This is a workaround because gcc does not
- generate correct return address in CIE. */
- if (frame_relative_level (next_frame) >= 0)
- pc += 8;
- return pc;
- }
- /* Return PC of first real instruction of the function starting at
- START_PC. */
- static CORE_ADDR
- microblaze_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR start_pc)
- {
- struct symtab_and_line sal;
- CORE_ADDR func_start, func_end, ostart_pc;
- struct microblaze_frame_cache cache;
- /* This is the preferred method, find the end of the prologue by
- using the debugging information. Debugging info does not always
- give the right answer since parameters are stored on stack after this.
- Always analyze the prologue. */
- 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)
- start_pc = sal.end;
- }
- ostart_pc = microblaze_analyze_prologue (gdbarch, func_start, 0xffffffffUL,
- &cache);
- if (ostart_pc > start_pc)
- return ostart_pc;
- return start_pc;
- }
- /* Normal frames. */
- static struct microblaze_frame_cache *
- microblaze_frame_cache (struct frame_info *next_frame, void **this_cache)
- {
- struct microblaze_frame_cache *cache;
- struct gdbarch *gdbarch = get_frame_arch (next_frame);
- int rn;
- if (*this_cache)
- return (struct microblaze_frame_cache *) *this_cache;
- cache = microblaze_alloc_frame_cache ();
- *this_cache = cache;
- cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
- /* Clear offsets to saved regs in frame. */
- for (rn = 0; rn < gdbarch_num_regs (gdbarch); rn++)
- cache->register_offsets[rn] = -1;
- /* Call for side effects. */
- get_frame_func (next_frame);
- cache->pc = get_frame_address_in_block (next_frame);
- return cache;
- }
- static void
- microblaze_frame_this_id (struct frame_info *next_frame, void **this_cache,
- struct frame_id *this_id)
- {
- struct microblaze_frame_cache *cache =
- microblaze_frame_cache (next_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 *
- microblaze_frame_prev_register (struct frame_info *this_frame,
- void **this_cache, int regnum)
- {
- struct microblaze_frame_cache *cache =
- microblaze_frame_cache (this_frame, this_cache);
- if (cache->frameless_p)
- {
- if (regnum == MICROBLAZE_PC_REGNUM)
- regnum = 15;
- if (regnum == MICROBLAZE_SP_REGNUM)
- regnum = 1;
- return trad_frame_get_prev_register (this_frame,
- cache->saved_regs, regnum);
- }
- else
- return trad_frame_get_prev_register (this_frame, cache->saved_regs,
- regnum);
- }
- static const struct frame_unwind microblaze_frame_unwind =
- {
- "microblaze prologue",
- NORMAL_FRAME,
- default_frame_unwind_stop_reason,
- microblaze_frame_this_id,
- microblaze_frame_prev_register,
- NULL,
- default_frame_sniffer
- };
- static CORE_ADDR
- microblaze_frame_base_address (struct frame_info *next_frame,
- void **this_cache)
- {
- struct microblaze_frame_cache *cache =
- microblaze_frame_cache (next_frame, this_cache);
- return cache->base;
- }
- static const struct frame_base microblaze_frame_base =
- {
- µblaze_frame_unwind,
- microblaze_frame_base_address,
- microblaze_frame_base_address,
- microblaze_frame_base_address
- };
- /* Extract from an array REGBUF containing the (raw) register state, a
- function return value of TYPE, and copy that into VALBUF. */
- static void
- microblaze_extract_return_value (struct type *type, struct regcache *regcache,
- gdb_byte *valbuf)
- {
- gdb_byte buf[8];
- /* Copy the return value (starting) in RETVAL_REGNUM to VALBUF. */
- switch (TYPE_LENGTH (type))
- {
- case 1: /* return last byte in the register. */
- regcache->cooked_read (MICROBLAZE_RETVAL_REGNUM, buf);
- memcpy(valbuf, buf + MICROBLAZE_REGISTER_SIZE - 1, 1);
- return;
- case 2: /* return last 2 bytes in register. */
- regcache->cooked_read (MICROBLAZE_RETVAL_REGNUM, buf);
- memcpy(valbuf, buf + MICROBLAZE_REGISTER_SIZE - 2, 2);
- return;
- case 4: /* for sizes 4 or 8, copy the required length. */
- case 8:
- regcache->cooked_read (MICROBLAZE_RETVAL_REGNUM, buf);
- regcache->cooked_read (MICROBLAZE_RETVAL_REGNUM + 1, buf+4);
- memcpy (valbuf, buf, TYPE_LENGTH (type));
- return;
- default:
- internal_error (__FILE__, __LINE__,
- _("Unsupported return value size requested"));
- }
- }
- /* Store the return value in VALBUF (of type TYPE) where the caller
- expects to see it.
- Integers up to four bytes are stored in r3.
- Longs are stored in r3 (most significant word) and r4 (least
- significant word).
- Small structures are always returned on stack. */
- static void
- microblaze_store_return_value (struct type *type, struct regcache *regcache,
- const gdb_byte *valbuf)
- {
- int len = TYPE_LENGTH (type);
- gdb_byte buf[8];
- memset (buf, 0, sizeof(buf));
- /* Integral and pointer return values. */
- if (len > 4)
- {
- gdb_assert (len == 8);
- memcpy (buf, valbuf, 8);
- regcache->cooked_write (MICROBLAZE_RETVAL_REGNUM+1, buf + 4);
- }
- else
- /* ??? Do we need to do any sign-extension here? */
- memcpy (buf + 4 - len, valbuf, len);
- regcache->cooked_write (MICROBLAZE_RETVAL_REGNUM, buf);
- }
- static enum return_value_convention
- microblaze_return_value (struct gdbarch *gdbarch, struct value *function,
- struct type *type, struct regcache *regcache,
- gdb_byte *readbuf, const gdb_byte *writebuf)
- {
- if (readbuf)
- microblaze_extract_return_value (type, regcache, readbuf);
- if (writebuf)
- microblaze_store_return_value (type, regcache, writebuf);
- return RETURN_VALUE_REGISTER_CONVENTION;
- }
- static int
- microblaze_stabs_argument_has_addr (struct gdbarch *gdbarch, struct type *type)
- {
- return (TYPE_LENGTH (type) == 16);
- }
- static int dwarf2_to_reg_map[78] =
- { 0 /* r0 */, 1 /* r1 */, 2 /* r2 */, 3 /* r3 */, /* 0- 3 */
- 4 /* r4 */, 5 /* r5 */, 6 /* r6 */, 7 /* r7 */, /* 4- 7 */
- 8 /* r8 */, 9 /* r9 */, 10 /* r10 */, 11 /* r11 */, /* 8-11 */
- 12 /* r12 */, 13 /* r13 */, 14 /* r14 */, 15 /* r15 */, /* 12-15 */
- 16 /* r16 */, 17 /* r17 */, 18 /* r18 */, 19 /* r19 */, /* 16-19 */
- 20 /* r20 */, 21 /* r21 */, 22 /* r22 */, 23 /* r23 */, /* 20-23 */
- 24 /* r24 */, 25 /* r25 */, 26 /* r26 */, 27 /* r27 */, /* 24-25 */
- 28 /* r28 */, 29 /* r29 */, 30 /* r30 */, 31 /* r31 */, /* 28-31 */
- -1 /* $f0 */, -1 /* $f1 */, -1 /* $f2 */, -1 /* $f3 */, /* 32-35 */
- -1 /* $f4 */, -1 /* $f5 */, -1 /* $f6 */, -1 /* $f7 */, /* 36-39 */
- -1 /* $f8 */, -1 /* $f9 */, -1 /* $f10 */, -1 /* $f11 */, /* 40-43 */
- -1 /* $f12 */, -1 /* $f13 */, -1 /* $f14 */, -1 /* $f15 */, /* 44-47 */
- -1 /* $f16 */, -1 /* $f17 */, -1 /* $f18 */, -1 /* $f19 */, /* 48-51 */
- -1 /* $f20 */, -1 /* $f21 */, -1 /* $f22 */, -1 /* $f23 */, /* 52-55 */
- -1 /* $f24 */, -1 /* $f25 */, -1 /* $f26 */, -1 /* $f27 */, /* 56-59 */
- -1 /* $f28 */, -1 /* $f29 */, -1 /* $f30 */, -1 /* $f31 */, /* 60-63 */
- -1 /* hi */, -1 /* lo */, -1 /* accum*/, 33 /* rmsr */, /* 64-67 */
- -1 /* $fcc1*/, -1 /* $fcc2*/, -1 /* $fcc3*/, -1 /* $fcc4*/, /* 68-71 */
- -1 /* $fcc5*/, -1 /* $fcc6*/, -1 /* $fcc7*/, -1 /* $ap */, /* 72-75 */
- -1 /* $rap */, -1 /* $frp */ /* 76-77 */
- };
- static int
- microblaze_dwarf2_reg_to_regnum (struct gdbarch *gdbarch, int reg)
- {
- if (reg >= 0 && reg < sizeof (dwarf2_to_reg_map))
- return dwarf2_to_reg_map[reg];
- return -1;
- }
- static void
- microblaze_register_g_packet_guesses (struct gdbarch *gdbarch)
- {
- register_remote_g_packet_guess (gdbarch,
- 4 * MICROBLAZE_NUM_CORE_REGS,
- tdesc_microblaze);
- register_remote_g_packet_guess (gdbarch,
- 4 * MICROBLAZE_NUM_REGS,
- tdesc_microblaze_with_stack_protect);
- }
- static struct gdbarch *
- microblaze_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
- {
- struct gdbarch *gdbarch;
- tdesc_arch_data_up tdesc_data;
- const struct target_desc *tdesc = info.target_desc;
- /* If there is already a candidate, use it. */
- arches = gdbarch_list_lookup_by_info (arches, &info);
- if (arches != NULL)
- return arches->gdbarch;
- if (tdesc == NULL)
- tdesc = tdesc_microblaze;
- /* Check any target description for validity. */
- if (tdesc_has_registers (tdesc))
- {
- const struct tdesc_feature *feature;
- int valid_p;
- int i;
- feature = tdesc_find_feature (tdesc,
- "org.gnu.gdb.microblaze.core");
- if (feature == NULL)
- return NULL;
- tdesc_data = tdesc_data_alloc ();
- valid_p = 1;
- for (i = 0; i < MICROBLAZE_NUM_CORE_REGS; i++)
- valid_p &= tdesc_numbered_register (feature, tdesc_data.get (), i,
- microblaze_register_names[i]);
- feature = tdesc_find_feature (tdesc,
- "org.gnu.gdb.microblaze.stack-protect");
- if (feature != NULL)
- {
- valid_p = 1;
- valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
- MICROBLAZE_SLR_REGNUM,
- "rslr");
- valid_p &= tdesc_numbered_register (feature, tdesc_data.get (),
- MICROBLAZE_SHR_REGNUM,
- "rshr");
- }
- if (!valid_p)
- return NULL;
- }
- /* Allocate space for the new architecture. */
- microblaze_gdbarch_tdep *tdep = new microblaze_gdbarch_tdep;
- gdbarch = gdbarch_alloc (&info, tdep);
- set_gdbarch_long_double_bit (gdbarch, 128);
- set_gdbarch_num_regs (gdbarch, MICROBLAZE_NUM_REGS);
- set_gdbarch_register_name (gdbarch, microblaze_register_name);
- set_gdbarch_register_type (gdbarch, microblaze_register_type);
- /* Register numbers of various important registers. */
- set_gdbarch_sp_regnum (gdbarch, MICROBLAZE_SP_REGNUM);
- set_gdbarch_pc_regnum (gdbarch, MICROBLAZE_PC_REGNUM);
- /* Map Dwarf2 registers to GDB registers. */
- set_gdbarch_dwarf2_reg_to_regnum (gdbarch, microblaze_dwarf2_reg_to_regnum);
- /* Call dummy code. */
- set_gdbarch_call_dummy_location (gdbarch, ON_STACK);
- set_gdbarch_return_value (gdbarch, microblaze_return_value);
- set_gdbarch_stabs_argument_has_addr
- (gdbarch, microblaze_stabs_argument_has_addr);
- set_gdbarch_skip_prologue (gdbarch, microblaze_skip_prologue);
- /* Stack grows downward. */
- set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
- set_gdbarch_breakpoint_kind_from_pc (gdbarch,
- microblaze_breakpoint::kind_from_pc);
- set_gdbarch_sw_breakpoint_from_kind (gdbarch,
- microblaze_breakpoint::bp_from_kind);
- set_gdbarch_frame_args_skip (gdbarch, 8);
- set_gdbarch_unwind_pc (gdbarch, microblaze_unwind_pc);
- microblaze_register_g_packet_guesses (gdbarch);
- frame_base_set_default (gdbarch, µblaze_frame_base);
- /* Hook in ABI-specific overrides, if they have been registered. */
- gdbarch_init_osabi (info, gdbarch);
- /* Unwind the frame. */
- dwarf2_append_unwinders (gdbarch);
- frame_unwind_append_unwinder (gdbarch, µblaze_frame_unwind);
- frame_base_append_sniffer (gdbarch, dwarf2_frame_base_sniffer);
- if (tdesc_data != NULL)
- tdesc_use_registers (gdbarch, tdesc, std::move (tdesc_data));
- return gdbarch;
- }
- void _initialize_microblaze_tdep ();
- void
- _initialize_microblaze_tdep ()
- {
- register_gdbarch_init (bfd_arch_microblaze, microblaze_gdbarch_init);
- initialize_tdesc_microblaze_with_stack_protect ();
- initialize_tdesc_microblaze ();
- /* Debug this files internals. */
- add_setshow_zuinteger_cmd ("microblaze", class_maintenance,
- µblaze_debug_flag, _("\
- Set microblaze debugging."), _("\
- Show microblaze debugging."), _("\
- When non-zero, microblaze specific debugging is enabled."),
- NULL,
- NULL,
- &setdebuglist, &showdebuglist);
- }
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