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-rw-r--r--arch/x86/kernel/entry_32.S17
1 files changed, 10 insertions, 7 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 79d97e68f042..7b784f4ef1e4 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -98,12 +98,6 @@
98#endif 98#endif
99.endm 99.endm
100 100
101#ifdef CONFIG_VM86
102#define resume_userspace_sig check_userspace
103#else
104#define resume_userspace_sig resume_userspace
105#endif
106
107/* 101/*
108 * User gs save/restore 102 * User gs save/restore
109 * 103 *
@@ -327,10 +321,19 @@ ret_from_exception:
327 preempt_stop(CLBR_ANY) 321 preempt_stop(CLBR_ANY)
328ret_from_intr: 322ret_from_intr:
329 GET_THREAD_INFO(%ebp) 323 GET_THREAD_INFO(%ebp)
330check_userspace: 324resume_userspace_sig:
325#ifdef CONFIG_VM86
331 movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS 326 movl PT_EFLAGS(%esp), %eax # mix EFLAGS and CS
332 movb PT_CS(%esp), %al 327 movb PT_CS(%esp), %al
333 andl $(X86_EFLAGS_VM | SEGMENT_RPL_MASK), %eax 328 andl $(X86_EFLAGS_VM | SEGMENT_RPL_MASK), %eax
329#else
330 /*
331 * We can be coming here from a syscall done in the kernel space,
332 * e.g. a failed kernel_execve().
333 */
334 movl PT_CS(%esp), %eax
335 andl $SEGMENT_RPL_MASK, %eax
336#endif
334 cmpl $USER_RPL, %eax 337 cmpl $USER_RPL, %eax
335 jb resume_kernel # not returning to v8086 or userspace 338 jb resume_kernel # not returning to v8086 or userspace
336 339