diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-11 14:41:43 +0200 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-15 01:35:44 +0200 |
| commit | 138d1ce80ed96eff6638f454f0a1500a4aefd17b (patch) | |
| tree | 68b9204f77986d2bce6928e32c5880708a5b6faa /arch | |
| parent | Linux 3.7-rc1 (diff) | |
| download | linux-138d1ce80ed96eff6638f454f0a1500a4aefd17b.tar.xz linux-138d1ce80ed96eff6638f454f0a1500a4aefd17b.zip | |
powerpc: switch to saner kernel_execve() semantics
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/Kconfig | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/unistd.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 6 | ||||
| -rw-r--r-- | arch/powerpc/kernel/process.c | 13 |
5 files changed, 4 insertions, 22 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a902a5c1c76a..5af5aa707176 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -144,6 +144,7 @@ config PPC select GENERIC_KERNEL_THREAD select HAVE_MOD_ARCH_SPECIFIC select MODULES_USE_ELF_RELA + select GENERIC_KERNEL_EXECVE config EARLY_PRINTK bool diff --git a/arch/powerpc/include/asm/unistd.h b/arch/powerpc/include/asm/unistd.h index 921dce6d8445..280068cfff2e 100644 --- a/arch/powerpc/include/asm/unistd.h +++ b/arch/powerpc/include/asm/unistd.h @@ -56,7 +56,6 @@ #define __ARCH_WANT_COMPAT_SYS_SENDFILE #endif #define __ARCH_WANT_SYS_EXECVE -#define __ARCH_WANT_KERNEL_EXECVE /* * "Conditional" syscalls diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 9499385676e7..d22e73e4618b 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -444,11 +444,6 @@ ret_from_kernel_thread: PPC440EP_ERR42 blrl li r3,0 - b do_exit # no return - - .globl __ret_from_kernel_execve -__ret_from_kernel_execve: - addi r1,r3,-STACK_FRAME_OVERHEAD b ret_from_syscall /* Traced system call support */ diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 56e0ff0878b5..2eb766ad1c5c 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -378,12 +378,6 @@ _GLOBAL(ret_from_kernel_thread) mr r3,r15 blrl li r3,0 - b .do_exit # no return - -_GLOBAL(__ret_from_kernel_execve) - addi r1,r3,-STACK_FRAME_OVERHEAD - li r10,1 - std r10,SOFTE(r1) b syscall_exit .section ".toc","aw" diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index ba48233500f6..9e685e26c2d1 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -746,19 +746,21 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, sp -= sizeof(struct pt_regs); childregs = (struct pt_regs *) sp; if (!regs) { - /* for kernel thread, set `current' and stackptr in new task */ + struct thread_info *ti = (void *)task_stack_page(p); memset(childregs, 0, sizeof(struct pt_regs)); childregs->gpr[1] = sp + sizeof(struct pt_regs); #ifdef CONFIG_PPC64 childregs->gpr[14] = *(unsigned long *)usp; childregs->gpr[2] = ((unsigned long *)usp)[1], clear_tsk_thread_flag(p, TIF_32BIT); + childregs->softe = 1; #else childregs->gpr[14] = usp; /* function */ childregs->gpr[2] = (unsigned long) p; #endif childregs->gpr[15] = arg; p->thread.regs = NULL; /* no user register state */ + ti->flags |= _TIF_RESTOREALL; f = ret_from_kernel_thread; } else { CHECK_FULL_REGS(regs); @@ -1063,15 +1065,6 @@ int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3, regs, 0, NULL, NULL); } -void __ret_from_kernel_execve(struct pt_regs *normal) -__noreturn; - -void ret_from_kernel_execve(struct pt_regs *normal) -{ - set_thread_flag(TIF_RESTOREALL); - __ret_from_kernel_execve(normal); -} - static inline int valid_irq_stack(unsigned long sp, struct task_struct *p, unsigned long nbytes) { |