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| author | Jan Beulich <jbeulich@novell.com> | 2006-11-28 20:12:59 +0100 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-11-28 20:12:59 +0100 |
| commit | ff0a538d8b08700df2b46f9aafc9fb2765071f0a (patch) | |
| tree | 7dc675a48c55763f80413182f8e6a364b03d6ab0 | |
| parent | a3550a9c543556cf7764be81aeb17c6dab440753 (diff) | |
| download | linux-ff0a538d8b08700df2b46f9aafc9fb2765071f0a.tar.bz2 | |
[PATCH] x86-64: work around gcc4 issue with -Os in Dwarf2 stack unwind
This fixes a problem with gcc4 mis-compiling the stack unwind code under
-Os, which resulted in 'stuck' messages whenever an assembly routine was
encountered.
(The second hunk is trivial cleanup.)
Signed-off-by: Jan Beulich <jbeulich@novell.com>
| -rw-r--r-- | kernel/unwind.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/unwind.c b/kernel/unwind.c index f7e50d16dbf6..ed0a21d4a902 100644 --- a/kernel/unwind.c +++ b/kernel/unwind.c @@ -938,8 +938,11 @@ int unwind(struct unwind_frame_info *frame) else { retAddrReg = state.version <= 1 ? *ptr++ : get_uleb128(&ptr, end); /* skip augmentation */ - if (((const char *)(cie + 2))[1] == 'z') - ptr += get_uleb128(&ptr, end); + if (((const char *)(cie + 2))[1] == 'z') { + uleb128_t augSize = get_uleb128(&ptr, end); + + ptr += augSize; + } if (ptr > end || retAddrReg >= ARRAY_SIZE(reg_info) || REG_INVALID(retAddrReg) @@ -963,9 +966,7 @@ int unwind(struct unwind_frame_info *frame) if (cie == NULL || fde == NULL) { #ifdef CONFIG_FRAME_POINTER unsigned long top, bottom; -#endif -#ifdef CONFIG_FRAME_POINTER top = STACK_TOP(frame->task); bottom = STACK_BOTTOM(frame->task); # if FRAME_RETADDR_OFFSET < 0 |