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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal

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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
This commit is contained in:
Linus Torvalds 2012-10-12 10:49:08 +09:00
commit 8213a2f3ee
99 changed files with 351 additions and 889 deletions
Download patch file Download diff file Expand all files Collapse all files

104
arch/m68k/kernel/process.c
View file

@ -35,6 +35,7 @@
asmlinkage void ret_from_fork(void);
asmlinkage void ret_from_kernel_thread(void);
/*
@ -123,51 +124,6 @@ void show_regs(struct pt_regs * regs)
printk("USP: %08lx\n", rdusp());
}
/*
* Create a kernel thread
*/
int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
{
int pid;
mm_segment_t fs;
fs = get_fs();
set_fs (KERNEL_DS);
{
register long retval __asm__ ("d0");
register long clone_arg __asm__ ("d1") = flags | CLONE_VM | CLONE_UNTRACED;
retval = __NR_clone;
__asm__ __volatile__
("clrl %%d2\n\t"
"trap #0\n\t" /* Linux/m68k system call */
"tstl %0\n\t" /* child or parent */
"jne 1f\n\t" /* parent - jump */
#ifdef CONFIG_MMU
"lea %%sp@(%c7),%6\n\t" /* reload current */
"movel %6@,%6\n\t"
#endif
"movel %3,%%sp@-\n\t" /* push argument */
"jsr %4@\n\t" /* call fn */
"movel %0,%%d1\n\t" /* pass exit value */
"movel %2,%%d0\n\t" /* exit */
"trap #0\n"
"1:"
: "+d" (retval)
: "i" (__NR_clone), "i" (__NR_exit),
"r" (arg), "a" (fn), "d" (clone_arg), "r" (current),
"i" (-THREAD_SIZE)
: "d2");
pid = retval;
}
set_fs (fs);
return pid;
}
EXPORT_SYMBOL(kernel_thread);
void flush_thread(void)
{
current->thread.fs = __USER_DS;
@ -219,30 +175,18 @@ asmlinkage int m68k_clone(struct pt_regs *regs)
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long unused,
unsigned long arg,
struct task_struct * p, struct pt_regs * regs)
{
struct pt_regs * childregs;
struct switch_stack * childstack, *stack;
unsigned long *retp;
struct switch_stack *childstack;
childregs = (struct pt_regs *) (task_stack_page(p) + THREAD_SIZE) - 1;
*childregs = *regs;
childregs->d0 = 0;
retp = ((unsigned long *) regs);
stack = ((struct switch_stack *) retp) - 1;
childstack = ((struct switch_stack *) childregs) - 1;
*childstack = *stack;
childstack->retpc = (unsigned long)ret_from_fork;
p->thread.usp = usp;
p->thread.ksp = (unsigned long)childstack;
if (clone_flags & CLONE_SETTLS)
task_thread_info(p)->tp_value = regs->d5;
p->thread.esp0 = (unsigned long)childregs;
/*
* Must save the current SFC/DFC value, NOT the value when
@ -250,6 +194,26 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
*/
p->thread.fs = get_fs().seg;
if (unlikely(!regs)) {
/* kernel thread */
memset(childstack, 0,
sizeof(struct switch_stack) + sizeof(struct pt_regs));
childregs->sr = PS_S;
childstack->a3 = usp; /* function */
childstack->d7 = arg;
childstack->retpc = (unsigned long)ret_from_kernel_thread;
p->thread.usp = 0;
return 0;
}
*childregs = *regs;
childregs->d0 = 0;
*childstack = ((struct switch_stack *) regs)[-1];
childstack->retpc = (unsigned long)ret_from_fork;
if (clone_flags & CLONE_SETTLS)
task_thread_info(p)->tp_value = regs->d5;
#ifdef CONFIG_FPU
if (!FPU_IS_EMU) {
/* Copy the current fpu state */
@ -337,26 +301,6 @@ int dump_fpu (struct pt_regs *regs, struct user_m68kfp_struct *fpu)
EXPORT_SYMBOL(dump_fpu);
#endif /* CONFIG_FPU */
/*
* 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;
struct pt_regs *regs = (struct pt_regs *) &name;
filename = getname(name);
error = PTR_ERR(filename);
if (IS_ERR(filename))
return error;
error = do_execve(filename, argv, envp, regs);
putname(filename);
return error;
}
unsigned long get_wchan(struct task_struct *p)
{
unsigned long fp, pc;