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authorAl Viro <viro@zeniv.linux.org.uk>2012-10-10 21:35:42 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-10-12 13:35:22 -0400
commit22e2430d60dbdfcdd732a086e9ef2dbd74c266d1 (patch)
tree687067fcaf2761015639178033ee16c8511703b8 /arch/x86/kernel/entry_32.S
parentinfrastructure for saner ret_from_kernel_thread semantics (diff)
downloadlinux-dev-22e2430d60dbdfcdd732a086e9ef2dbd74c266d1.tar.xz
linux-dev-22e2430d60dbdfcdd732a086e9ef2dbd74c266d1.zip
x86, um: convert to saner kernel_execve() semantics
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to '')
-rw-r--r--arch/x86/kernel/entry_32.S31
1 files changed, 12 insertions, 19 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index fe4cc305d8da..91d295908c30 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -298,12 +298,20 @@ ENTRY(ret_from_fork)
CFI_ENDPROC
END(ret_from_fork)
-ENTRY(ret_from_kernel_execve)
- movl %eax, %esp
- movl $0,PT_EAX(%esp)
+ENTRY(ret_from_kernel_thread)
+ CFI_STARTPROC
+ pushl_cfi %eax
+ call schedule_tail
GET_THREAD_INFO(%ebp)
+ popl_cfi %eax
+ pushl_cfi $0x0202 # Reset kernel eflags
+ popfl_cfi
+ movl PT_EBP(%esp),%eax
+ call *PT_EBX(%esp)
+ movl $0,PT_EAX(%esp)
jmp syscall_exit
-END(ret_from_kernel_execve)
+ CFI_ENDPROC
+ENDPROC(ret_from_kernel_thread)
/*
* Interrupt exit functions should be protected against kprobes
@@ -994,21 +1002,6 @@ END(spurious_interrupt_bug)
*/
.popsection
-ENTRY(ret_from_kernel_thread)
- CFI_STARTPROC
- pushl_cfi %eax
- call schedule_tail
- GET_THREAD_INFO(%ebp)
- popl_cfi %eax
- pushl_cfi $0x0202 # Reset kernel eflags
- popfl_cfi
- movl PT_EBP(%esp),%eax
- call *PT_EBX(%esp)
- call do_exit
- ud2 # padding for call trace
- CFI_ENDPROC
-ENDPROC(ret_from_kernel_thread)
-
#ifdef CONFIG_XEN
/* Xen doesn't set %esp to be precisely what the normal sysenter
entrypoint expects, so fix it up before using the normal path. */