diff options
| author | Chris Metcalf <cmetcalf@tilera.com> | 2012-10-23 13:30:54 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-23 16:23:58 -0400 |
| commit | 6b14e4198c729b748a7f6d22059e6a101d2b241a (patch) | |
| tree | 77668782763f74aec995899e919231e81a71d56a /arch/tile/kernel/compat_signal.c | |
| parent | 530550651fdfd548d25b6bd5ff4607803540508b (diff) | |
arch/tile: eliminate pt_regs trampolines for syscalls
Using the new current_pt_regs() model, we can remove some trampolines
from assembly code and call directly to the C syscall implementations.
rt_sigreturn() and clone() still need some assembly wrapping, but no
longer are passed a pt_regs pointer. sigaltstack() and the
tilepro-specific cmpxchg_badaddr() syscalls are now just straight C.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile/kernel/compat_signal.c')
| -rw-r--r-- | arch/tile/kernel/compat_signal.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/tile/kernel/compat_signal.c b/arch/tile/kernel/compat_signal.c index 08b4fe1717bb..210a9bbae963 100644 --- a/arch/tile/kernel/compat_signal.c +++ b/arch/tile/kernel/compat_signal.c @@ -197,8 +197,7 @@ int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from) } long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, - struct compat_sigaltstack __user *uoss_ptr, - struct pt_regs *regs) + struct compat_sigaltstack __user *uoss_ptr) { stack_t uss, uoss; int ret; @@ -219,7 +218,7 @@ long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, set_fs(KERNEL_DS); ret = do_sigaltstack(uss_ptr ? (stack_t __user __force *)&uss : NULL, (stack_t __user __force *)&uoss, - (unsigned long)compat_ptr(regs->sp)); + (unsigned long)compat_ptr(current_pt_regs()->sp)); set_fs(seg); if (ret >= 0 && uoss_ptr) { if (!access_ok(VERIFY_WRITE, uoss_ptr, sizeof(*uoss_ptr)) || @@ -232,8 +231,9 @@ long compat_sys_sigaltstack(const struct compat_sigaltstack __user *uss_ptr, } /* The assembly shim for this function arranges to ignore the return value. */ -long compat_sys_rt_sigreturn(struct pt_regs *regs) +long compat_sys_rt_sigreturn(void) { + struct pt_regs *regs = current_pt_regs(); struct compat_rt_sigframe __user *frame = (struct compat_rt_sigframe __user *) compat_ptr(regs->sp); sigset_t set; @@ -248,7 +248,7 @@ long compat_sys_rt_sigreturn(struct pt_regs *regs) if (restore_sigcontext(regs, &frame->uc.uc_mcontext)) goto badframe; - if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL, regs) != 0) + if (compat_sys_sigaltstack(&frame->uc.uc_stack, NULL) != 0) goto badframe; return 0; |