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| author | John David Anglin <dave.anglin@nrc-cnrc.gc.ca> | 2005-02-11 01:46:20 +0000 |
|---|---|---|
| committer | John David Anglin <danglin@gcc.gnu.org> | 2005-02-11 01:46:20 +0000 |
| commit | 9dcab61e1c7d555f1c5555dcb6a69f090fbca33c (patch) | |
| tree | 2a0dcea9069260e4e3b28f6ab249e8f1643ff4e8 /gcc | |
| parent | 70ad1f9f9f1be78ab02e80b8e6e593d7518c6d25 (diff) | |
| download | gcc-9dcab61e1c7d555f1c5555dcb6a69f090fbca33c.zip gcc-9dcab61e1c7d555f1c5555dcb6a69f090fbca33c.tar.gz gcc-9dcab61e1c7d555f1c5555dcb6a69f090fbca33c.tar.bz2 | |
linux-unwind.h (pa32_fallback_frame_state): Handle misaligned signal trampolines.
* pa/linux-unwind.h (pa32_fallback_frame_state): Handle misaligned
signal trampolines.
From-SVN: r94869
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/pa/linux-unwind.h | 17 |
2 files changed, 21 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1e4b5f6..34513ea 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2005-02-10 John David Anglin <dave.anglin@nrc-cnrc.gc.ca> + + * pa/linux-unwind.h (pa32_fallback_frame_state): Handle misaligned + signal trampolines. + 2005-02-10 David Daney <ddaney@avtrex.com> * config/alpha/linux-unwind.h: Add exception clause to copyright. diff --git a/gcc/config/pa/linux-unwind.h b/gcc/config/pa/linux-unwind.h index 25791e5..3e23f62 100644 --- a/gcc/config/pa/linux-unwind.h +++ b/gcc/config/pa/linux-unwind.h @@ -86,7 +86,22 @@ pa32_fallback_frame_state (struct _Unwind_Context *context, off = 10 * 4; } else - return _URC_END_OF_STACK; + { + /* We may have to unwind through an alternate signal stack. + We assume that the alignment of the alternate signal stack + is BIGGEST_ALIGNMENT (i.e., that it has been allocated using + malloc). As a result, we can't distinguish trampolines + used prior to 2.6.5-rc2-pa4. However after 2.6.5-rc2-pa4, + the return address of a signal trampoline will be on an odd + word boundary and we can then determine the frame offset. */ + sp = (unsigned long)context->ra; + pc = (unsigned int *)sp; + if ((pc[0] == 0x34190000 || pc[0] == 0x34190002) && (sp & 4)) + off = 5 * 4; + else + return _URC_END_OF_STACK; + } + if (pc[1] != 0x3414015a || pc[2] != 0xe4008200 || pc[3] != 0x08000240) |