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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-01-05 10:36:40 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2024-01-09 13:55:51 -0300 |
| commit | 25f1e16ef03a6a8fb1701c4647d46c564480d88c (patch) | |
| tree | c4f2b8148ab0fe004bae19105d8f8169ab9922a7 /sysdeps/unix/sysv/linux/i386/vfork.S | |
| parent | b7fc4a07f206a640e6d807d72f5c1ee3ea7a25b6 (diff) | |
| download | glibc-25f1e16ef03a6a8fb1701c4647d46c564480d88c.tar glibc-25f1e16ef03a6a8fb1701c4647d46c564480d88c.tar.gz glibc-25f1e16ef03a6a8fb1701c4647d46c564480d88c.tar.bz2 glibc-25f1e16ef03a6a8fb1701c4647d46c564480d88c.zip | |
i386: Remove CET support
CET is only support for x86_64, this patch reverts:
- faaee1f07ed x86: Support shadow stack pointer in setjmp/longjmp.
- be9ccd27c09 i386: Add _CET_ENDBR to indirect jump targets in
add_n.S/sub_n.S
- c02695d7764 x86/CET: Update vfork to prevent child return
- 5d844e1b725 i386: Enable CET support in ucontext functions
- 124bcde683 x86: Add _CET_ENDBR to functions in crti.S
- 562837c002 x86: Add _CET_ENDBR to functions in dl-tlsdesc.S
- f753fa7dea x86: Support IBT and SHSTK in Intel CET [BZ #21598]
- 825b58f3fb i386-mcount.S: Add _CET_ENDBR to _mcount and __fentry__
- 7e119cd582 i386: Use _CET_NOTRACK in i686/memcmp.S
- 177824e232 i386: Use _CET_NOTRACK in memcmp-sse4.S
- 0a899af097 i386: Use _CET_NOTRACK in memcpy-ssse3-rep.S
- 7fb613361c i386: Use _CET_NOTRACK in memcpy-ssse3.S
- 77a8ae0948 i386: Use _CET_NOTRACK in memset-sse2-rep.S
- 00e7b76a8f i386: Use _CET_NOTRACK in memset-sse2.S
- 90d15dc577 i386: Use _CET_NOTRACK in strcat-sse2.S
- f1574581c7 i386: Use _CET_NOTRACK in strcpy-sse2.S
- 4031d7484a i386/sub_n.S: Add a missing _CET_ENDBR to indirect jump
- target
-
Checked on i686-linux-gnu.
Diffstat (limited to 'sysdeps/unix/sysv/linux/i386/vfork.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/i386/vfork.S | 24 |
1 files changed, 1 insertions, 23 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/vfork.S b/sysdeps/unix/sysv/linux/i386/vfork.S index 80c2058f1e..8846b61b96 100644 --- a/sysdeps/unix/sysv/linux/i386/vfork.S +++ b/sysdeps/unix/sysv/linux/i386/vfork.S @@ -20,6 +20,7 @@ #include <bits/errno.h> #include <tcb-offsets.h> + /* Clone the calling process, but without copying the whole address space. The calling process is suspended until the new process exits or is replaced by a call to `execve'. Return -1 for errors, 0 to the new process, @@ -46,29 +47,6 @@ ENTRY (__vfork) /* Branch forward if it failed. */ jae SYSCALL_ERROR_LABEL -#if SHSTK_ENABLED - /* Check if shadow stack is in use. */ - xorl %edx, %edx - rdsspd %edx - testl %edx, %edx - /* Normal return if shadow stack isn't in use. */ - je L(no_shstk) - - testl %eax, %eax - /* In parent, normal return. */ - jnz L(no_shstk) - - /* NB: In child, jump back to caller via indirect branch without - popping shadow stack which is shared with parent. Keep shadow - stack mismatched so that child returns in the vfork-calling - function will trigger SIGSEGV. */ - popl %ecx - cfi_adjust_cfa_offset (-4) - jmp *%ecx - -L(no_shstk): -#endif - ret PSEUDO_END (__vfork) |