diff options
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/process_32.c | 15 | ||||
| -rw-r--r-- | arch/x86/kernel/process_64.c | 15 |
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 */ |