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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 13:34:53 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-08 13:34:53 -0800 |
| commit | e7522ed5c0140486f68bf3351b4e667f570b8c76 (patch) | |
| tree | 04d56d4647b96b9eb75b5f2c842943d099cabe42 /arch/x86/kernel | |
| parent | b391738bd1c708fe85592410c6a7c9752689481d (diff) | |
| parent | e634d8fc792c66c3d4ff45518c04848c1e28f221 (diff) | |
Merge branch 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-process-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86-64: merge the standard and compat start_thread() functions
x86-64: make compat_start_thread() match start_thread()
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 32 |
1 files changed, 24 insertions, 8 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index a98fe88fab6..c95c8f4e790 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -349,26 +349,42 @@ out: return err; } -void -start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp) +static void +start_thread_common(struct pt_regs *regs, unsigned long new_ip, + unsigned long new_sp, + unsigned int _cs, unsigned int _ss, unsigned int _ds) { loadsegment(fs, 0); - loadsegment(es, 0); - loadsegment(ds, 0); + loadsegment(es, _ds); + loadsegment(ds, _ds); load_gs_index(0); regs->ip = new_ip; regs->sp = new_sp; percpu_write(old_rsp, new_sp); - regs->cs = __USER_CS; - regs->ss = __USER_DS; - regs->flags = 0x200; + regs->cs = _cs; + regs->ss = _ss; + regs->flags = X86_EFLAGS_IF; set_fs(USER_DS); /* * Free the old FP and other extended state */ free_thread_xstate(current); } -EXPORT_SYMBOL_GPL(start_thread); + +void +start_thread(struct pt_regs *regs, unsigned long new_ip, unsigned long new_sp) +{ + start_thread_common(regs, new_ip, new_sp, + __USER_CS, __USER_DS, 0); +} + +#ifdef CONFIG_IA32_EMULATION +void start_thread_ia32(struct pt_regs *regs, u32 new_ip, u32 new_sp) +{ + start_thread_common(regs, new_ip, new_sp, + __USER32_CS, __USER32_DS, __USER32_DS); +} +#endif /* * switch_to(x,y) should switch tasks from x to y. |