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| -rw-r--r-- | gdb/ChangeLog | 4 | ||||
| -rw-r--r-- | gdb/i386-tdep.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 1c3aa31..d1112fb 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,9 @@ 2007-01-05 Joel Brobecker <brobecker@adacore.com> + * i386-tdep.c (i386_analyze_stack_align): Add comment. + +2007-01-05 Joel Brobecker <brobecker@adacore.com> + * NEWS: Add entries for new catch commands. 2006-02-05 Joel Brobecker <brobecker@adacore.com> diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c index cd52bf6..de7e226 100644 --- a/gdb/i386-tdep.c +++ b/gdb/i386-tdep.c @@ -497,6 +497,10 @@ static CORE_ADDR i386_analyze_stack_align (CORE_ADDR pc, CORE_ADDR current_pc, struct i386_frame_cache *cache) { + /* The register used by the compiler to perform the stack re-alignment + is, in order of preference, either %ecx, %edx, or %eax. GCC should + never use %ebx as it always treats it as callee-saved, whereas + the compiler can only use caller-saved registers. */ static const gdb_byte insns_ecx[10] = { 0x8d, 0x4c, 0x24, 0x04, /* leal 4(%esp), %ecx */ 0x83, 0xe4, 0xf0, /* andl $-16, %esp */ |