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* arm-tdep.c (arm_skip_prologue): Handle "sub ip, sp #n" and

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"add ip, sp #n" in the prologue.
	(arm_scan_prologue): Ditto.
This commit is contained in:
Jerome Guitton 2003-09-25 14:21:00 +00:00
parent a4ab2b5d08
commit 28cd87675d
2 changed files with 32 additions and 3 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2003-09-25 Jerome Guitton <guitton@act-europe.fr>
* arm-tdep.c (arm_skip_prologue): Handle "sub ip, sp #n" and
"add ip, sp #n" in the prologue.
(arm_scan_prologue): Ditto.
2003-09-25 Jerome Guitton <guitton@act-europe.fr>
* MAINTAINERS (write after approval): Add myself.

29
gdb/arm-tdep.c
View File

@ -455,6 +455,12 @@ arm_skip_prologue (CORE_ADDR pc)
if (inst == 0xe1a0c00d) /* mov ip, sp */
continue;
if ((inst & 0xfffff000) == 0xe28dc000) /* add ip, sp #n */
continue;
if ((inst & 0xfffff000) == 0xe24dc000) /* sub ip, sp #n */
continue;
/* Some prologues begin with "str lr, [sp, #-4]!". */
if (inst == 0xe52de004) /* str lr, [sp, #-4]! */
continue;
@ -707,7 +713,7 @@ thumb_scan_prologue (CORE_ADDR prev_pc, struct arm_prologue_cache *cache)
static void
arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cache)
{
int regno, sp_offset, fp_offset;
int regno, sp_offset, fp_offset, ip_offset;
CORE_ADDR prologue_start, prologue_end, current_pc;
CORE_ADDR prev_pc = frame_pc_unwind (next_frame);
@ -808,7 +814,7 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac
in which case it is often (but not always) replaced by
"str lr, [sp, #-4]!". - Michael Snyder, 2002-04-23] */
sp_offset = fp_offset = 0;
sp_offset = fp_offset = ip_offset = 0;
for (current_pc = prologue_start;
current_pc < prologue_end;
@ -818,6 +824,23 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac
if (insn == 0xe1a0c00d) /* mov ip, sp */
{
ip_offset = 0;
continue;
}
else if ((insn & 0xfffff000) == 0xe28dc000) /* add ip, sp #n */
{
unsigned imm = insn & 0xff; /* immediate value */
unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */
imm = (imm >> rot) | (imm << (32 - rot));
ip_offset = imm;
continue;
}
else if ((insn & 0xfffff000) == 0xe24dc000) /* sub ip, sp #n */
{
unsigned imm = insn & 0xff; /* immediate value */
unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */
imm = (imm >> rot) | (imm << (32 - rot));
ip_offset = -imm;
continue;
}
else if (insn == 0xe52de004) /* str lr, [sp, #-4]! */
@ -859,7 +882,7 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac
unsigned imm = insn & 0xff; /* immediate value */
unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */
imm = (imm >> rot) | (imm << (32 - rot));
fp_offset = -imm;
fp_offset = -imm + ip_offset;
cache->framereg = ARM_FP_REGNUM;
}
else if ((insn & 0xfffff000) == 0xe24dd000) /* sub sp, sp #n */