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author | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-23 08:13:40 (GMT) |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 23:32:24 (GMT) |
commit | ea536ad4f231a0055792d9b144715605cbd670c1 (patch) | |
tree | 31c7cd55f356cc80ba28b6e989e99af27fd2c567 /arch/mips/kernel/signal_n32.c | |
parent | c6489c147de592af4d0d1c5263e7b4f0e8e7d100 (diff) | |
download | linux-ea536ad4f231a0055792d9b144715605cbd670c1.tar.xz |
mips: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/mips/kernel/signal_n32.c')
-rw-r--r-- | arch/mips/kernel/signal_n32.c | 38 |
1 files changed, 3 insertions, 35 deletions
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c index 3574c14..e62e2bc 100644 --- a/arch/mips/kernel/signal_n32.c +++ b/arch/mips/kernel/signal_n32.c @@ -50,18 +50,10 @@ extern int setup_sigcontext(struct pt_regs *, struct sigcontext __user *); extern int restore_sigcontext(struct pt_regs *, struct sigcontext __user *); - -/* IRIX compatible stack_t */ -typedef struct sigaltstack32 { - s32 ss_sp; - compat_size_t ss_size; - int ss_flags; -} stack32_t; - struct ucontextn32 { u32 uc_flags; s32 uc_link; - stack32_t uc_stack; + compat_stack_t uc_stack; struct sigcontext uc_mcontext; compat_sigset_t uc_sigmask; /* mask last for extensibility */ }; @@ -97,10 +89,7 @@ asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) { struct rt_sigframe_n32 __user *frame; - mm_segment_t old_fs; sigset_t set; - stack_t st; - s32 sp; int sig; frame = (struct rt_sigframe_n32 __user *) regs.regs[29]; @@ -117,22 +106,8 @@ asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) else if (sig) force_sig(sig, current); - /* The ucontext contains a stack32_t, so we must convert! */ - if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) - goto badframe; - st.ss_sp = (void __user *)(long) sp; - if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) + if (compat_restore_altstack(&frame->rs_uc.uc_stack)) goto badframe; - if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) - goto badframe; - - /* 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((stack_t __user *)&st, NULL, regs.regs[29]); - set_fs(old_fs); - /* * Don't let your children do this ... @@ -153,7 +128,6 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka, { struct rt_sigframe_n32 __user *frame; int err = 0; - s32 sp; frame = get_sigframe(ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) @@ -165,13 +139,7 @@ static int setup_rt_frame_n32(void *sig_return, struct k_sigaction *ka, /* Create the ucontext. */ err |= __put_user(0, &frame->rs_uc.uc_flags); err |= __put_user(0, &frame->rs_uc.uc_link); - sp = (int) (long) current->sas_ss_sp; - err |= __put_user(sp, - &frame->rs_uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->regs[29]), - &frame->rs_uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, - &frame->rs_uc.uc_stack.ss_size); + err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); |