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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 20:22:13 (GMT) |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-12-12 20:22:13 (GMT) |
commit | 9977d9b379cb77e0f67bd6f4563618106e58e11d (patch) | |
tree | 0191accfddf578edb52c69c933d64521e3dce297 /arch/x86/um | |
parent | cf4af01221579a4e895f43dbfc47598fbfc5a731 (diff) | |
parent | 541880d9a2c7871f6370071d55aa6662d329c51e (diff) | |
download | linux-fsl-qoriq-9977d9b379cb77e0f67bd6f4563618106e58e11d.tar.xz |
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/x86/um')
-rw-r--r-- | arch/x86/um/Kconfig | 1 | ||||
-rw-r--r-- | arch/x86/um/shared/sysdep/syscalls.h | 2 | ||||
-rw-r--r-- | arch/x86/um/sys_call_table_32.c | 3 | ||||
-rw-r--r-- | arch/x86/um/syscalls_32.c | 15 |
4 files changed, 1 insertions, 20 deletions
diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index b0c30da..9839970 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -25,6 +25,7 @@ config X86_32 select HAVE_AOUT select ARCH_WANT_IPC_PARSE_VERSION select MODULES_USE_ELF_REL + select CLONE_BACKWARDS config X86_64 def_bool 64BIT diff --git a/arch/x86/um/shared/sysdep/syscalls.h b/arch/x86/um/shared/sysdep/syscalls.h index ca255a8..bd9a89b 100644 --- a/arch/x86/um/shared/sysdep/syscalls.h +++ b/arch/x86/um/shared/sysdep/syscalls.h @@ -1,5 +1,3 @@ -extern long sys_clone(unsigned long clone_flags, unsigned long newsp, - void __user *parent_tid, void __user *child_tid); #ifdef __i386__ #include "syscalls_32.h" #else diff --git a/arch/x86/um/sys_call_table_32.c b/arch/x86/um/sys_call_table_32.c index 232e605..812e98c 100644 --- a/arch/x86/um/sys_call_table_32.c +++ b/arch/x86/um/sys_call_table_32.c @@ -24,13 +24,10 @@ #define old_mmap sys_old_mmap -#define ptregs_fork sys_fork #define ptregs_iopl sys_iopl #define ptregs_vm86old sys_vm86old -#define ptregs_clone i386_clone #define ptregs_vm86 sys_vm86 #define ptregs_sigaltstack sys_sigaltstack -#define ptregs_vfork sys_vfork #define __SYSCALL_I386(nr, sym, compat) extern asmlinkage void sym(void) ; #include <asm/syscalls_32.h> diff --git a/arch/x86/um/syscalls_32.c b/arch/x86/um/syscalls_32.c index db444c7..e8bcea9 100644 --- a/arch/x86/um/syscalls_32.c +++ b/arch/x86/um/syscalls_32.c @@ -6,21 +6,6 @@ #include <linux/syscalls.h> #include <sysdep/syscalls.h> -/* - * The prototype on i386 is: - * - * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls - * - * and the "newtls" arg. on i386 is read by copy_thread directly from the - * register saved on the stack. - */ -long i386_clone(unsigned long clone_flags, unsigned long newsp, - int __user *parent_tid, void *newtls, int __user *child_tid) -{ - return sys_clone(clone_flags, newsp, parent_tid, child_tid); -} - - long sys_sigaction(int sig, const struct old_sigaction __user *act, struct old_sigaction __user *oact) { |