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authorLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 10:49:08 +0900
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-12 10:49:08 +0900
commit8213a2f3eeafdecf06dd718cb4130372263f6067 (patch)
tree0d02e3201dac64d1429f8552ee1163d4a1ef1646 /arch/x86
parent40924754f2cabd5d9af4bcd4dcecc362b5e0baa1 (diff)
parent12f79be93d94698778ff2b3f921073fc5f6780d6 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull pile 2 of execve and kernel_thread unification work from Al Viro: "Stuff in there: kernel_thread/kernel_execve/sys_execve conversions for several more architectures plus assorted signal fixes and cleanups. There'll be more (in particular, real fixes for the alpha do_notify_resume() irq mess)..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (43 commits) alpha: don't open-code trace_report_syscall_{enter,exit} Uninclude linux/freezer.h m32r: trim masks avr32: trim masks tile: don't bother with SIGTRAP in setup_frame microblaze: don't bother with SIGTRAP in setup_rt_frame() mn10300: don't bother with SIGTRAP in setup_frame() frv: no need to raise SIGTRAP in setup_frame() x86: get rid of duplicate code in case of CONFIG_VM86 unicore32: remove pointless test h8300: trim _TIF_WORK_MASK parisc: decide whether to go to slow path (tracesys) based on thread flags parisc: don't bother looping in do_signal() parisc: fix double restarts bury the rest of TIF_IRET sanitize tsk_is_polling() bury _TIF_RESTORE_SIGMASK unicore32: unobfuscate _TIF_WORK_MASK mips: NOTIFY_RESUME is not needed in TIF masks mips: merge the identical "return from syscall" per-ABI code ... Conflicts: arch/arm/include/asm/thread_info.h
Diffstat (limited to 'arch/x86')
-rw-r--r--arch/x86/kernel/entry_32.S17
1 files changed, 6 insertions, 11 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 8f9ed1afde8f..2c6340796fe9 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -622,6 +622,10 @@ work_notifysig: # deal with pending signals and
movl %esp, %eax
jne work_notifysig_v86 # returning to kernel-space or
# vm86-space
+1:
+#else
+ movl %esp, %eax
+#endif
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_NONE)
movb PT_CS(%esp), %bl
@@ -632,24 +636,15 @@ work_notifysig: # deal with pending signals and
call do_notify_resume
jmp resume_userspace
+#ifdef CONFIG_VM86
ALIGN
work_notifysig_v86:
pushl_cfi %ecx # save ti_flags for do_notify_resume
call save_v86_state # %eax contains pt_regs pointer
popl_cfi %ecx
movl %eax, %esp
-#else
- movl %esp, %eax
+ jmp 1b
#endif
- TRACE_IRQS_ON
- ENABLE_INTERRUPTS(CLBR_NONE)
- movb PT_CS(%esp), %bl
- andb $SEGMENT_RPL_MASK, %bl
- cmpb $USER_RPL, %bl
- jb resume_kernel
- xorl %edx, %edx
- call do_notify_resume
- jmp resume_userspace
END(work_pending)
# perform syscall exit tracing