Messages in this thread Patch in this message | | | From | Roland McGrath <> | Subject | [PATCH] x86_64 ia32 ptrace vs -ENOSYS sysenter/syscall | Date | Tue, 18 Mar 2008 18:23:50 -0700 (PDT) |
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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> --- 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 eafb0b9..b5e329d 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)
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