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binutils-gdb
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improved end-of-stack handling.

This commit is contained in:
David Taylor 1997-12-19 06:55:44 +00:00
parent 76b534725e
commit 36985eca91
3 changed files with 32 additions and 10 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
start-sanitize-d30v
Fri Dec 19 09:49:49 1997 David Taylor <taylor@texas.cygnus.com>
* d30v-tdep.c (d30v_frame_chain): test end_of_stack
(d30v_frame_find_saved_regs): set it.
* config/d30v/tm-d30v.h: improved FRAME_CHAIN_VALID
end-sanitize-d30v
Thu Dec 18 12:34:28 1997 Andrew Cagney <cagney@b1.cygnus.com>
From Gavin Koch <gavin@cygnus.com>: mips-tdep.c

11
gdb/config/d30v/tm-d30v.h
View File

@ -218,16 +218,11 @@ extern void d30v_init_extra_frame_info PARAMS (( int fromleaf, struct frame_info
#define FRAME_CHAIN(FRAME) d30v_frame_chain(FRAME)
#if 0
#define FRAME_CHAIN_VALID(chain,frame) \
((chain) != 0 && (frame) != 0 && (frame)->pc > IMEM_START)
#else
#if 0
#define FRAME_CHAIN_VALID(chain,fi) \
((chain) != 0 && (fi) != 0 && (fi)->frame <= STACK_START)
#else
#define FRAME_CHAIN_VALID(chain,fi) \
((chain) != 0 && (fi) != 0 && (fi)->return_pc != 0)
#endif
#else
#define FRAME_CHAIN_VALID(chain,fi) \
((chain) != 0 && (fi) != 0 && (fi)->frame <= chain)
#endif
#define FRAME_SAVED_PC(FRAME) ((FRAME)->return_pc)
#define FRAME_ARGS_ADDRESS(fi) (fi)->frame

23
gdb/d30v-tdep.c
View File

@ -63,6 +63,7 @@ static void print_flags_command PARAMS ((char *, int));
#define OP_ADD_SP_IMM 0x080bffc0 /* add sp,sp,imm */
#define OP_ADD_R22_SP_IMM 0x08096fc0 /* add r22,sp,imm */
#define OP_STW_FP_SP_IMM 0x054bdfc0 /* stw fp,@(sp,imm) */
#define OP_OR_SP_R0_IMM 0x03abf000 /* or sp,r0,imm */
/* no mask */
#define OP_OR_FP_R0_SP 0x03a3d03f /* or fp,r0,sp */
@ -293,6 +294,8 @@ d30v_skip_prologue (pc)
return pc;
}
static int end_of_stack;
/* Given a GDB frame, determine the address of the calling function's frame.
This will be used to create a new GDB frame struct, and then
INIT_EXTRA_FRAME_INFO and INIT_FRAME_PC will be called for the new frame.
@ -306,6 +309,9 @@ d30v_frame_chain (frame)
d30v_frame_find_saved_regs (frame, &fsr);
if (end_of_stack)
return (CORE_ADDR)0;
if (frame->return_pc == IMEM_START)
return (CORE_ADDR)0;
@ -463,6 +469,13 @@ prologue_find_regs (op, fsr, addr)
return 1;
}
/* stw fp,@(sp,imm) -- observed */
if ((op & OP_MASK_ALL_BUT_IMM) == OP_STW_FP_SP_IMM)
{
offset = EXTRACT_IMM6(op);
fsr->regs[FP_REGNUM] = (offset - frame_size);
return 1;
}
return 0;
}
@ -486,6 +499,7 @@ d30v_frame_find_saved_regs (fi, fsr)
memset (fsr, 0, sizeof (*fsr));
next_addr = 0;
frame_size = 0;
end_of_stack = 0;
pc = get_pc_function_start (fi->pc);
@ -531,6 +545,10 @@ d30v_frame_find_saved_regs (fi, fsr)
fsr->regs[n] = (offset - frame_size);
fsr->regs[n+1] = (offset - frame_size) + 4;
}
else if ((opl & OP_MASK_ALL_BUT_IMM) == OP_OR_SP_R0_IMM)
{
end_of_stack = 1;
}
else
break;
}
@ -554,10 +572,11 @@ d30v_frame_find_saved_regs (fi, fsr)
}
fi->size = frame_size;
if (!fp || !uses_frame)
#if 0
fp = read_register(SP_REGNUM) | DMEM_START;
if (!fp || !uses_frame)
fp = read_register(SP_REGNUM);
#else
if (!fp)
fp = read_register(SP_REGNUM);
#endif
for (i=0; i<NUM_REGS-1; i++)