diff options
| author | Roland McGrath <roland@redhat.com> | 2008-03-18 18:23:50 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-17 17:41:13 +0200 |
| commit | 48ee679a02406c65ced67c3951ad19744eb21083 (patch) | |
| tree | 99d2c19468a41e1c3694c7ed0e524c0ada424f47 /arch | |
| parent | a31f8dd7ee3b2f5645c220406b1e21f82971f32b (diff) | |
x86: ia32 ptrace vs -ENOSYS sysenter/syscall
The previous "x86_64 ia32 ptrace vs -ENOSYS" fix only covered
the int $0x80 system call entries. This does the same fix
for the sysenter and syscall instruction paths.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/ia32/ia32entry.S | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S index 30f492934f2..ae7158bce4d 100644 --- a/arch/x86/ia32/ia32entry.S +++ b/arch/x86/ia32/ia32entry.S @@ -162,12 +162,14 @@ sysenter_tracesys: SAVE_REST CLEAR_RREGS movq %r9,R9(%rsp) - movq $-ENOSYS,RAX(%rsp) /* really needed? */ + movq $-ENOSYS,RAX(%rsp)/* ptrace can change this for a bad syscall */ movq %rsp,%rdi /* &pt_regs -> arg1 */ call syscall_trace_enter LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ RESTORE_REST xchgl %ebp,%r9d + cmpl $(IA32_NR_syscalls-1),%eax + ja int_ret_from_sys_call /* sysenter_tracesys has set RAX(%rsp) */ jmp sysenter_do_call CFI_ENDPROC ENDPROC(ia32_sysenter_target) @@ -261,13 +263,15 @@ cstar_tracesys: SAVE_REST CLEAR_RREGS movq %r9,R9(%rsp) - movq $-ENOSYS,RAX(%rsp) /* really needed? */ + movq $-ENOSYS,RAX(%rsp) /* ptrace can change this for a bad syscall */ movq %rsp,%rdi /* &pt_regs -> arg1 */ call syscall_trace_enter LOAD_ARGS32 ARGOFFSET /* reload args from stack in case ptrace changed it */ RESTORE_REST xchgl %ebp,%r9d movl RSP-ARGOFFSET(%rsp), %r8d + cmpl $(IA32_NR_syscalls-1),%eax + ja int_ret_from_sys_call /* cstar_tracesys has set RAX(%rsp) */ jmp cstar_do_call END(ia32_cstar_target) |