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| author | davidxu <davidxu@FreeBSD.org> | 2004-06-15 21:46:36 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2004-06-15 21:46:36 +0000 |
| commit | 682485c4b36ff37b9f76bac76e0acb2c38baa708 (patch) | |
| tree | 2f8723c9735c2787504a475098c4efd60b615f50 /lib/libc/amd64 | |
| parent | 69fc473ab3b7ad17d88abf0626e21c10d697f1aa (diff) | |
| download | FreeBSD-src-682485c4b36ff37b9f76bac76e0acb2c38baa708.zip FreeBSD-src-682485c4b36ff37b9f76bac76e0acb2c38baa708.tar.gz | |
Avoid to touch red zone, in libpthread, ucontext may be saved by kernel's
get_mcontext, and libpthread will use signalcontext to deliver signal in
userland, it looks same as kernel's send_sig does.
Reviewed by: deischen, tjr
Diffstat (limited to 'lib/libc/amd64')
| -rw-r--r-- | lib/libc/amd64/gen/signalcontext.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/libc/amd64/gen/signalcontext.c b/lib/libc/amd64/gen/signalcontext.c index 4eb1919..e24f6cb 100644 --- a/lib/libc/amd64/gen/signalcontext.c +++ b/lib/libc/amd64/gen/signalcontext.c @@ -58,7 +58,7 @@ __signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func) * This means that we need an 8-byte-odd alignment since the ABI expects * the return address to be pushed, thus breaking the 16 byte alignment. */ - sp = (ucp->uc_mcontext.mc_rsp - sizeof(ucontext_t)) & ~15UL; + sp = (ucp->uc_mcontext.mc_rsp - 128 - sizeof(ucontext_t)) & ~15UL; sig_uc = (ucontext_t *)sp; bcopy(ucp, sig_uc, sizeof(*sig_uc)); sp = (sp - sizeof(siginfo_t)) & ~15UL; |
