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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-12 01:49:08 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-12 01:49:08 (GMT) |
commit | 8213a2f3eeafdecf06dd718cb4130372263f6067 (patch) | |
tree | 0d02e3201dac64d1429f8552ee1163d4a1ef1646 /arch/frv/kernel/process.c | |
parent | 40924754f2cabd5d9af4bcd4dcecc362b5e0baa1 (diff) | |
parent | 12f79be93d94698778ff2b3f921073fc5f6780d6 (diff) | |
download | linux-fsl-qoriq-8213a2f3eeafdecf06dd718cb4130372263f6067.tar.xz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull pile 2 of execve and kernel_thread unification work from Al Viro:
"Stuff in there: kernel_thread/kernel_execve/sys_execve conversions for
several more architectures plus assorted signal fixes and cleanups.
There'll be more (in particular, real fixes for the alpha
do_notify_resume() irq mess)..."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (43 commits)
alpha: don't open-code trace_report_syscall_{enter,exit}
Uninclude linux/freezer.h
m32r: trim masks
avr32: trim masks
tile: don't bother with SIGTRAP in setup_frame
microblaze: don't bother with SIGTRAP in setup_rt_frame()
mn10300: don't bother with SIGTRAP in setup_frame()
frv: no need to raise SIGTRAP in setup_frame()
x86: get rid of duplicate code in case of CONFIG_VM86
unicore32: remove pointless test
h8300: trim _TIF_WORK_MASK
parisc: decide whether to go to slow path (tracesys) based on thread flags
parisc: don't bother looping in do_signal()
parisc: fix double restarts
bury the rest of TIF_IRET
sanitize tsk_is_polling()
bury _TIF_RESTORE_SIGMASK
unicore32: unobfuscate _TIF_WORK_MASK
mips: NOTIFY_RESUME is not needed in TIF masks
mips: merge the identical "return from syscall" per-ABI code
...
Conflicts:
arch/arm/include/asm/thread_info.h
Diffstat (limited to 'arch/frv/kernel/process.c')
-rw-r--r-- | arch/frv/kernel/process.c | 66 |
1 files changed, 23 insertions, 43 deletions
diff --git a/arch/frv/kernel/process.c b/arch/frv/kernel/process.c index 2eb7fa5..655d90d 100644 --- a/arch/frv/kernel/process.c +++ b/arch/frv/kernel/process.c @@ -38,6 +38,7 @@ #include "local.h" asmlinkage void ret_from_fork(void); +asmlinkage void ret_from_kernel_thread(void); #include <asm/pgalloc.h> @@ -172,32 +173,13 @@ asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, * set up the kernel stack and exception frames for a new process */ int copy_thread(unsigned long clone_flags, - unsigned long usp, unsigned long topstk, + unsigned long usp, unsigned long arg, struct task_struct *p, struct pt_regs *regs) { - struct pt_regs *childregs0, *childregs, *regs0; + struct pt_regs *childregs; - regs0 = __kernel_frame0_ptr; - childregs0 = (struct pt_regs *) + childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE - FRV_FRAME0_SIZE); - childregs = childregs0; - - /* set up the userspace frame (the only place that the USP is stored) */ - *childregs0 = *regs0; - - childregs0->gr8 = 0; - childregs0->sp = usp; - childregs0->next_frame = NULL; - - /* set up the return kernel frame if called from kernel_thread() */ - if (regs != regs0) { - childregs--; - *childregs = *regs; - childregs->sp = (unsigned long) childregs0; - childregs->next_frame = childregs0; - childregs->gr15 = (unsigned long) task_thread_info(p); - childregs->gr29 = (unsigned long) p; - } p->set_child_tid = p->clear_child_tid = NULL; @@ -206,8 +188,25 @@ int copy_thread(unsigned long clone_flags, p->thread.sp = (unsigned long) childregs; p->thread.fp = 0; p->thread.lr = 0; - p->thread.pc = (unsigned long) ret_from_fork; - p->thread.frame0 = childregs0; + p->thread.frame0 = childregs; + + if (unlikely(!regs)) { + memset(childregs, 0, sizeof(struct pt_regs)); + childregs->gr9 = usp; /* function */ + childregs->gr8 = arg; + chilregs->psr = PSR_S; + p->thread.pc = (unsigned long) ret_from_kernel_thread; + save_user_regs(p->thread.user); + return 0; + } + + /* set up the userspace frame (the only place that the USP is stored) */ + *childregs = *regs; + + childregs->sp = usp; + childregs->next_frame = NULL; + + p->thread.pc = (unsigned long) ret_from_fork; /* the new TLS pointer is passed in as arg #5 to sys_clone() */ if (clone_flags & CLONE_SETTLS) @@ -218,25 +217,6 @@ int copy_thread(unsigned long clone_flags, return 0; } /* end copy_thread() */ -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char __user *name, - const char __user *const __user *argv, - const char __user *const __user *envp) -{ - int error; - char * filename; - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename, argv, envp, __frame); - putname(filename); - return error; -} - unsigned long get_wchan(struct task_struct *p) { struct pt_regs *regs0; |