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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 12:22:13 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 12:22:13 -0800 |
commit | 9977d9b379cb77e0f67bd6f4563618106e58e11d (patch) | |
tree | 0191accfddf578edb52c69c933d64521e3dce297 /arch/unicore32 | |
parent | cf4af01221579a4e895f43dbfc47598fbfc5a731 (diff) | |
parent | 541880d9a2c7871f6370071d55aa6662d329c51e (diff) | |
download | linux-9977d9b379cb77e0f67bd6f4563618106e58e11d.tar.gz |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull big execve/kernel_thread/fork unification series from Al Viro: "All architectures are converted to new model. Quite a bit of that stuff is actually shared with architecture trees; in such cases it's literally shared branch pulled by both, not a cherry-pick. A lot of ugliness and black magic is gone (-3KLoC total in this one): - kernel_thread()/kernel_execve()/sys_execve() redesign. We don't do syscalls from kernel anymore for either kernel_thread() or kernel_execve(): kernel_thread() is essentially clone(2) with callback run before we return to userland, the callbacks either never return or do successful do_execve() before returning. kernel_execve() is a wrapper for do_execve() - it doesn't need to do transition to user mode anymore. As a result kernel_thread() and kernel_execve() are arch-independent now - they live in kernel/fork.c and fs/exec.c resp. sys_execve() is also in fs/exec.c and it's completely architecture-independent. - daemonize() is gone, along with its parts in fs/*.c - struct pt_regs * is no longer passed to do_fork/copy_process/ copy_thread/do_execve/search_binary_handler/->load_binary/do_coredump. - sys_fork()/sys_vfork()/sys_clone() unified; some architectures still need wrappers (ones with callee-saved registers not saved in pt_regs on syscall entry), but the main part of those suckers is in kernel/fork.c now." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (113 commits) do_coredump(): get rid of pt_regs argument print_fatal_signal(): get rid of pt_regs argument ptrace_signal(): get rid of unused arguments get rid of ptrace_signal_deliver() arguments new helper: signal_pt_regs() unify default ptrace_signal_deliver flagday: kill pt_regs argument of do_fork() death to idle_regs() don't pass regs to copy_process() flagday: don't pass regs to copy_thread() bfin: switch to generic vfork, get rid of pointless wrappers xtensa: switch to generic clone() openrisc: switch to use of generic fork and clone unicore32: switch to generic clone(2) score: switch to generic fork/vfork/clone c6x: sanitize copy_thread(), get rid of clone(2) wrapper, switch to generic clone() take sys_fork/sys_vfork/sys_clone prototypes to linux/syscalls.h mn10300: switch to generic fork/vfork/clone h8300: switch to generic fork/vfork/clone tile: switch to generic clone() ... Conflicts: arch/microblaze/include/asm/Kbuild
Diffstat (limited to 'arch/unicore32')
-rw-r--r-- | arch/unicore32/include/uapi/asm/unistd.h | 1 | ||||
-rw-r--r-- | arch/unicore32/kernel/entry.S | 6 | ||||
-rw-r--r-- | arch/unicore32/kernel/process.c | 11 | ||||
-rw-r--r-- | arch/unicore32/kernel/sys.c | 14 |
4 files changed, 7 insertions, 25 deletions
diff --git a/arch/unicore32/include/uapi/asm/unistd.h b/arch/unicore32/include/uapi/asm/unistd.h index d18a3be89b38..00cf5e286fca 100644 --- a/arch/unicore32/include/uapi/asm/unistd.h +++ b/arch/unicore32/include/uapi/asm/unistd.h @@ -13,3 +13,4 @@ /* Use the standard ABI for syscalls. */ #include <asm-generic/unistd.h> #define __ARCH_WANT_SYS_EXECVE +#define __ARCH_WANT_SYS_CLONE diff --git a/arch/unicore32/kernel/entry.S b/arch/unicore32/kernel/entry.S index 7049350c790f..581630d91444 100644 --- a/arch/unicore32/kernel/entry.S +++ b/arch/unicore32/kernel/entry.S @@ -668,12 +668,6 @@ __cr_alignment: #endif .ltorg -ENTRY(sys_clone) - add ip, sp, #S_OFF - stw ip, [sp+], #4 - b __sys_clone -ENDPROC(sys_clone) - ENTRY(sys_rt_sigreturn) add r0, sp, #S_OFF mov why, #0 @ prevent syscall restart handling diff --git a/arch/unicore32/kernel/process.c b/arch/unicore32/kernel/process.c index a8fe265ce2c0..62bad9fed03e 100644 --- a/arch/unicore32/kernel/process.c +++ b/arch/unicore32/kernel/process.c @@ -262,26 +262,27 @@ asmlinkage void ret_from_kernel_thread(void) __asm__("ret_from_kernel_thread"); int copy_thread(unsigned long clone_flags, unsigned long stack_start, - unsigned long stk_sz, struct task_struct *p, struct pt_regs *regs) + unsigned long stk_sz, struct task_struct *p) { struct thread_info *thread = task_thread_info(p); struct pt_regs *childregs = task_pt_regs(p); memset(&thread->cpu_context, 0, sizeof(struct cpu_context_save)); thread->cpu_context.sp = (unsigned long)childregs; - if (unlikely(!regs)) { + if (unlikely(p->flags & PF_KTHREAD)) { thread->cpu_context.pc = (unsigned long)ret_from_kernel_thread; thread->cpu_context.r4 = stack_start; thread->cpu_context.r5 = stk_sz; memset(childregs, 0, sizeof(struct pt_regs)); } else { thread->cpu_context.pc = (unsigned long)ret_from_fork; - *childregs = *regs; + *childregs = *current_pt_regs(); childregs->UCreg_00 = 0; - childregs->UCreg_sp = stack_start; + if (stack_start) + childregs->UCreg_sp = stack_start; if (clone_flags & CLONE_SETTLS) - childregs->UCreg_16 = regs->UCreg_03; + childregs->UCreg_16 = childregs->UCreg_03; } return 0; } diff --git a/arch/unicore32/kernel/sys.c b/arch/unicore32/kernel/sys.c index 9680134b31f0..cfe79c9529b3 100644 --- a/arch/unicore32/kernel/sys.c +++ b/arch/unicore32/kernel/sys.c @@ -28,20 +28,6 @@ #include <asm/syscalls.h> #include <asm/cacheflush.h> -/* Clone a task - this clones the calling program thread. - * This is called indirectly via a small wrapper - */ -asmlinkage long __sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid, - struct pt_regs *regs) -{ - if (!newsp) - newsp = regs->UCreg_sp; - - return do_fork(clone_flags, newsp, regs, 0, - parent_tid, child_tid); -} - /* Note: used by the compat code even in 64-bit Linux. */ SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, unsigned long, prot, unsigned long, flags, |