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author | kan <kan@FreeBSD.org> | 2009-07-14 21:19:13 +0000 |
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committer | kan <kan@FreeBSD.org> | 2009-07-14 21:19:13 +0000 |
commit | ef443476d9706035ac219f0280ef0b817dda7a6d (patch) | |
tree | 50c2540e7067c9b377ade1910cd0348aeab454e7 /lib/libc/sys/stack_protector.c | |
parent | d81f73fcb520cff58dcafda0e644b91837b26a40 (diff) | |
download | FreeBSD-src-ef443476d9706035ac219f0280ef0b817dda7a6d.zip FreeBSD-src-ef443476d9706035ac219f0280ef0b817dda7a6d.tar.gz |
Second attempt at eliminating .text relocations in shared libraries
compiled with stack protector.
Use libssp_nonshared library to pull __stack_chk_fail_local symbol into
each library that needs it instead of pulling it from libc. GCC
generates local calls to this function which result in absolute
relocations put into position-independent code segment, making dynamic
loader do extra work every time given shared library is being relocated
and making affected text pages non-shareable.
Reviewed by: kib
Approved by: re (kib)
Diffstat (limited to 'lib/libc/sys/stack_protector.c')
-rw-r--r-- | lib/libc/sys/stack_protector.c | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/lib/libc/sys/stack_protector.c b/lib/libc/sys/stack_protector.c index f753fcd..63beebc 100644 --- a/lib/libc/sys/stack_protector.c +++ b/lib/libc/sys/stack_protector.c @@ -47,7 +47,6 @@ static void __guard_setup(void) __attribute__((__constructor__, __used__)); static void __fail(const char *); void __stack_chk_fail(void); void __chk_fail(void); -void __stack_chk_fail_local(void); /*LINTED used*/ static void @@ -109,8 +108,4 @@ __chk_fail(void) __fail("buffer overflow detected; terminated"); } -void -__stack_chk_fail_local(void) -{ - __stack_chk_fail(); -} +__sym_compat(__stack_chk_fail_local, __stack_chk_fail, FBSD_1.0); |