OpenE2K/binutils-gdb
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* i386-tdep.c (i386_analyze_frame_setup): Handle opcode
	0x8d (lea).
This commit is contained in:
Yao Qi 2012-11-09 10:11:21 +00:00
parent 5bb3703f01
commit 30f8135b5c
2 changed files with 40 additions and 3 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2012-11-09 Yao Qi <yao@codesourcery.com>
* i386-tdep.c (i386_analyze_frame_setup): Handle opcode
0x8d (lea).
2012-11-09 Yao Qi <yao@codesourcery.com>
* breakpoint.c: Declare set_tracepoint_count.

38
gdb/i386-tdep.c
View File

@ -1388,18 +1388,40 @@ i386_analyze_frame_setup (struct gdbarch *gdbarch,
if (target_read_memory (pc + skip, &op, 1))
return pc + skip;
/* Check for `movl %esp, %ebp' -- can be written in two ways. */
/* The i386 prologue looks like
push %ebp
mov %esp,%ebp
sub $0x10,%esp
and a different prologue can be generated for atom.
push %ebp
lea (%esp),%ebp
lea -0x10(%esp),%esp
We handle both of them here. */
switch (op)
{
/* Check for `movl %esp, %ebp' -- can be written in two ways. */
case 0x8b:
if (read_memory_unsigned_integer (pc + skip + 1, 1, byte_order)
!= 0xec)
return pc;
pc += (skip + 2);
break;
case 0x89:
if (read_memory_unsigned_integer (pc + skip + 1, 1, byte_order)
!= 0xe5)
return pc;
pc += (skip + 2);
break;
case 0x8d: /* Check for 'lea (%ebp), %ebp'. */
if (read_memory_unsigned_integer (pc + skip + 1, 2, byte_order)
!= 0x242c)
return pc;
pc += (skip + 3);
break;
default:
return pc;
@ -1410,7 +1432,6 @@ i386_analyze_frame_setup (struct gdbarch *gdbarch,
necessary. We also now commit to skipping the special
instructions mentioned before. */
cache->locals = 0;
pc += (skip + 2);
/* If that's all, return now. */
if (limit <= pc)
@ -1419,6 +1440,8 @@ i386_analyze_frame_setup (struct gdbarch *gdbarch,
/* Check for stack adjustment
subl $XXX, %esp
or
lea -XXX(%esp),%esp
NOTE: You can't subtract a 16-bit immediate from a 32-bit
reg, so we don't have to worry about a data16 prefix. */
@ -1447,9 +1470,18 @@ i386_analyze_frame_setup (struct gdbarch *gdbarch,
cache->locals = read_memory_integer (pc + 2, 4, byte_order);
return pc + 6;
}
else if (op == 0x8d)
{
/* The ModR/M byte is 0x64. */
if (read_memory_unsigned_integer (pc + 1, 1, byte_order) != 0x64)
return pc;
/* 'lea' with 8-bit displacement. */
cache->locals = -1 * read_memory_integer (pc + 3, 1, byte_order);
return pc + 4;
}
else
{
/* Some instruction other than `subl'. */
/* Some instruction other than `subl' nor 'lea'. */
return pc;
}
}