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authorIngo Molnar <mingo@elte.hu>2008-02-21 05:18:40 +0100
committerIngo Molnar <mingo@elte.hu>2008-04-17 17:40:49 +0200
commit513ad84bf60d96a6998bca10ed07c3d340449be8 (patch)
tree2a1600178aea7e130c5881ac861cb5aa69450937 /arch
parent1180e01de50c0c7683c6648251f32957bc2d7850 (diff)
x86: de-macro start_thread()
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/process_32.c15
-rw-r--r--arch/x86/kernel/process_64.c15
2 files changed, 30 insertions, 0 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c
index 2cd89b8a705..9230ce060d0 100644
--- a/arch/x86/kernel/process_32.c
+++ b/arch/x86/kernel/process_32.c
@@ -512,6 +512,21 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long sp,
return err;
}
+void
+start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+{
+ __asm__("movl %0, %%gs" :: "r"(0));
+ regs->fs = 0;
+ set_fs(USER_DS);
+ regs->ds = __USER_DS;
+ regs->es = __USER_DS;
+ regs->ss = __USER_DS;
+ regs->cs = __USER_CS;
+ regs->ip = new_ip;
+ regs->sp = new_sp;
+}
+EXPORT_SYMBOL_GPL(start_thread);
+
#ifdef CONFIG_SECCOMP
static void hard_disable_TSC(void)
{
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c
index 46c4c546b49..1ffce14cff6 100644
--- a/arch/x86/kernel/process_64.c
+++ b/arch/x86/kernel/process_64.c
@@ -528,6 +528,21 @@ out:
return err;
}
+void
+start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp)
+{
+ asm volatile("movl %0, %%fs; movl %0, %%es; movl %0, %%ds" :: "r"(0));
+ load_gs_index(0);
+ regs->ip = new_ip;
+ regs->sp = new_sp;
+ write_pda(oldrsp, new_sp);
+ regs->cs = __USER_CS;
+ regs->ss = __USER_DS;
+ regs->flags = 0x200;
+ set_fs(USER_DS);
+}
+EXPORT_SYMBOL_GPL(start_thread);
+
/*
* This special macro can be used to load a debugging register
*/