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old sigsuspend variants in kernel/signal.c

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conditional on OLD_SIGSUSPEND/OLD_SIGSUSPEND3, depending on which
variety of that fossil is needed.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-25 16:04:12 -05:00
parent 75907d4d7b
commit 0a0e8cdf73
3 changed files with 35 additions and 0 deletions
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10
arch/Kconfig
View File

@ -387,4 +387,14 @@ config ODD_RT_SIGACTION
help
Architecture has unusual rt_sigaction(2) arguments
config OLD_SIGSUSPEND
bool
help
Architecture has old sigsuspend(2) syscall, of one-argument variety
config OLD_SIGSUSPEND3
bool
help
Even weirder antique ABI - three-argument sigsuspend(2)
source "kernel/gcov/Kconfig"

8
include/linux/syscalls.h
View File

@ -377,6 +377,14 @@ asmlinkage long sys_init_module(void __user *umod, unsigned long len,
asmlinkage long sys_delete_module(const char __user *name_user,
unsigned int flags);
#ifdef CONFIG_OLD_SIGSUSPEND
asmlinkage long sys_sigsuspend(old_sigset_t mask);
#endif
#ifdef CONFIG_OLD_SIGSUSPEND3
asmlinkage long sys_sigsuspend(int unused1, int unused2, old_sigset_t mask);
#endif
#ifndef CONFIG_ODD_RT_SIGACTION
asmlinkage long sys_rt_sigaction(int,
const struct sigaction __user *,

17
kernel/signal.c
View File

@ -3454,6 +3454,23 @@ COMPAT_SYSCALL_DEFINE2(rt_sigsuspend, compat_sigset_t __user *, unewset, compat_
#endif
#endif
#ifdef CONFIG_OLD_SIGSUSPEND
SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
#endif
#ifdef CONFIG_OLD_SIGSUSPEND3
SYSCALL_DEFINE3(sigsuspend, int, unused1, int, unused2, old_sigset_t, mask)
{
sigset_t blocked;
siginitset(&blocked, mask);
return sigsuspend(&blocked);
}
#endif
__attribute__((weak)) const char *arch_vma_name(struct vm_area_struct *vma)
{
return NULL;