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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 19:11:26 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 19:11:26 +0200 |
| commit | d19110baaf20d5183689287bdbcf91e26e40cb79 (patch) | |
| tree | e4beb421c2bd9e0cd6e9bb75480c1c705c7db102 | |
| parent | Merge git://git.infradead.org/battery-2.6 (diff) | |
| parent | x86: ptrace: sysret path should reach syscall_trace_leave (diff) | |
| download | linux-d19110baaf20d5183689287bdbcf91e26e40cb79.tar.xz linux-d19110baaf20d5183689287bdbcf91e26e40cb79.zip | |
Merge branch 'x86/ptrace-syscall-exit' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland
* 'x86/ptrace-syscall-exit' of git://git.kernel.org/pub/scm/linux/kernel/git/frob/linux-2.6-roland:
x86: ptrace: sysret path should reach syscall_trace_leave
| -rw-r--r-- | arch/x86/kernel/entry_64.S | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index 681c3fda7391..b5c061f8f358 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -536,20 +536,13 @@ sysret_signal: bt $TIF_SYSCALL_AUDIT,%edx jc sysret_audit #endif - /* edx: work flags (arg3) */ - leaq -ARGOFFSET(%rsp),%rdi # &pt_regs -> arg1 - xorl %esi,%esi # oldset -> arg2 - SAVE_REST - FIXUP_TOP_OF_STACK %r11 - call do_notify_resume - RESTORE_TOP_OF_STACK %r11 - RESTORE_REST - movl $_TIF_WORK_MASK,%edi - /* Use IRET because user could have changed frame. This - works because ptregscall_common has called FIXUP_TOP_OF_STACK. */ - DISABLE_INTERRUPTS(CLBR_NONE) - TRACE_IRQS_OFF - jmp int_with_check + /* + * We have a signal, or exit tracing or single-step. + * These all wind up with the iret return path anyway, + * so just join that path right now. + */ + FIXUP_TOP_OF_STACK %r11, -ARGOFFSET + jmp int_check_syscall_exit_work badsys: movq $-ENOSYS,RAX-ARGOFFSET(%rsp) @@ -654,6 +647,7 @@ int_careful: int_very_careful: TRACE_IRQS_ON ENABLE_INTERRUPTS(CLBR_NONE) +int_check_syscall_exit_work: SAVE_REST /* Check for syscall exit trace */ testl $_TIF_WORK_SYSCALL_EXIT,%edx |