diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-23 03:41:17 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 18:16:17 -0500 |
| commit | 99b06feb0f7c99f171cb962d0e6a17f81625abd3 (patch) | |
| tree | e2d184a61dcf5b0317bfbc204c1e9e4256649b7f /arch/sparc/kernel/signal_32.c | |
| parent | 0aa0203fb43f04714004b2c4ad33b858e240555d (diff) | |
sparc: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/sparc/kernel/signal_32.c')
| -rw-r--r-- | arch/sparc/kernel/signal_32.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c index 68f9c8650af..7391fa89651 100644 --- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -141,9 +141,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) unsigned int psr, pc, npc; __siginfo_fpu_t __user *fpu_save; __siginfo_rwin_t __user *rwin_save; - mm_segment_t old_fs; sigset_t set; - stack_t st; int err; synchronize_user_stack(); @@ -171,8 +169,7 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) if (!err && fpu_save) err |= restore_fpu_state(regs, fpu_save); err |= __copy_from_user(&set, &sf->mask, sizeof(sigset_t)); - - err |= __copy_from_user(&st, &sf->stack, sizeof(stack_t)); + err |= restore_altstack(&sf->stack); if (err) goto segv; @@ -180,14 +177,6 @@ asmlinkage void do_rt_sigreturn(struct pt_regs *regs) regs->pc = pc; regs->npc = npc; - /* It is more difficult to avoid calling this function than to - * call it and ignore errors. - */ - old_fs = get_fs(); - set_fs(KERNEL_DS); - do_sigaltstack((const stack_t __user *) &st, NULL, (unsigned long)sf); - set_fs(old_fs); - err |= __get_user(rwin_save, &sf->rwin_save); if (!err && rwin_save) { if (restore_rwin_state(rwin_save)) @@ -391,9 +380,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs, err |= __copy_to_user(&sf->mask, &oldset->sig[0], sizeof(sigset_t)); /* Setup sigaltstack */ - err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags); - err |= __put_user(current->sas_ss_size, &sf->stack.ss_size); + err |= __save_altstack(&sf->stack, regs->u_regs[UREG_FP]); if (!wsaved) { err |= __copy_to_user(sf, (char *) regs->u_regs[UREG_FP], |