luck/tmp_suning_uos_patched
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arm64: switch to generic old sigaction() (compat-only)

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-25 19:31:29 -05:00
parent 02323a9d92
commit 51682036d0
2 changed files with 1 additions and 45 deletions
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1
arch/arm64/Kconfig
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@ -210,6 +210,7 @@ config COMPAT
select COMPAT_BINFMT_ELF
select HAVE_UID16
select OLD_SIGSUSPEND3
select COMPAT_OLD_SIGACTION
help
This option enables support for a 32-bit EL0 running under a 64-bit
kernel at EL1. AArch32-specific components such as system calls,

45
arch/arm64/kernel/signal32.c
View File

@ -28,13 +28,6 @@
#include <asm/uaccess.h>
#include <asm/unistd32.h>
struct compat_old_sigaction {
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
compat_ulong_t sa_flags;
compat_uptr_t sa_restorer;
};
struct compat_sigcontext {
/* We always set these two fields to 0 */
compat_ulong_t trap_no;
@ -326,44 +319,6 @@ static int compat_restore_vfp_context(struct compat_vfp_sigframe __user *frame)
return err ? -EFAULT : 0;
}
asmlinkage int compat_sys_sigaction(int sig,
const struct compat_old_sigaction __user *act,
struct compat_old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (act) {
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka.sa.sa_handler = compat_ptr(handler);
new_ka.sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka.sa.sa_mask, mask);
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(ptr_to_compat(old_ka.sa.sa_handler),
&oact->sa_handler) ||
__put_user(ptr_to_compat(old_ka.sa.sa_restorer),
&oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
static int compat_restore_sigframe(struct pt_regs *regs,
struct compat_sigframe __user *sf)
{