diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-23 03:22:04 -0500 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 18:16:05 -0500 |
commit | 6e26aab98ce8a818fb1ec47f8f727a8480a9011b (patch) | |
tree | 3579b895d5b4ff1343b54686d91381d16a1313f0 /arch/parisc/kernel | |
parent | 0aa0203fb43f04714004b2c4ad33b858e240555d (diff) |
parisc: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/parisc/kernel')
-rw-r--r-- | arch/parisc/kernel/entry.S | 38 | ||||
-rw-r--r-- | arch/parisc/kernel/signal.c | 19 | ||||
-rw-r--r-- | arch/parisc/kernel/signal32.c | 35 | ||||
-rw-r--r-- | arch/parisc/kernel/signal32.h | 8 | ||||
-rw-r--r-- | arch/parisc/kernel/syscall_table.S | 2 |
5 files changed, 5 insertions, 97 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index bfb44247d7a7..240d153daec3 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -1748,44 +1748,6 @@ ENTRY(sys_rt_sigreturn_wrapper) LDREG PT_GR28(%r1),%r28 /* reload original r28 for syscall_exit */ ENDPROC(sys_rt_sigreturn_wrapper) -ENTRY(sys_sigaltstack_wrapper) - /* Get the user stack pointer */ - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r1 - ldo TASK_REGS(%r1),%r24 /* get pt regs */ - LDREG TASK_PT_GR30(%r24),%r24 - STREG %r2, -RP_OFFSET(%r30) -#ifdef CONFIG_64BIT - ldo FRAME_SIZE(%r30), %r30 - BL do_sigaltstack,%r2 - ldo -16(%r30),%r29 /* Reference param save area */ -#else - BL do_sigaltstack,%r2 - ldo FRAME_SIZE(%r30), %r30 -#endif - - ldo -FRAME_SIZE(%r30), %r30 - LDREG -RP_OFFSET(%r30), %r2 - bv %r0(%r2) - nop -ENDPROC(sys_sigaltstack_wrapper) - -#ifdef CONFIG_64BIT -ENTRY(sys32_sigaltstack_wrapper) - /* Get the user stack pointer */ - LDREG TI_TASK-THREAD_SZ_ALGN-FRAME_SIZE(%r30),%r24 - LDREG TASK_PT_GR30(%r24),%r24 - STREG %r2, -RP_OFFSET(%r30) - ldo FRAME_SIZE(%r30), %r30 - BL do_sigaltstack32,%r2 - ldo -16(%r30),%r29 /* Reference param save area */ - - ldo -FRAME_SIZE(%r30), %r30 - LDREG -RP_OFFSET(%r30), %r2 - bv %r0(%r2) - nop -ENDPROC(sys32_sigaltstack_wrapper) -#endif - ENTRY(syscall_exit) /* NOTE: HP-UX syscalls also come through here * after hpux_syscall_exit fixes up return diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c index 537996955998..64d315f6d2a4 100644 --- a/arch/parisc/kernel/signal.c +++ b/arch/parisc/kernel/signal.c @@ -143,7 +143,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall) goto give_sigsegv; DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n", usp, &compat_frame->uc.uc_stack); - if (do_sigaltstack32(&compat_frame->uc.uc_stack, NULL, usp) == -EFAULT) + if (compat_restore_altstack(&compat_frame->uc.uc_stack)) goto give_sigsegv; } else #endif @@ -154,7 +154,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall) goto give_sigsegv; DBG(1,"sys_rt_sigreturn: usp %#08lx stack 0x%p\n", usp, &frame->uc.uc_stack); - if (do_sigaltstack(&frame->uc.uc_stack, NULL, usp) == -EFAULT) + if (restore_altstack(&frame->uc.uc_stack)) goto give_sigsegv; } @@ -260,15 +260,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, if (is_compat_task()) { DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info); err |= copy_siginfo_to_user32(&compat_frame->info, info); - DBG(1,"SETUP_RT_FRAME: 1\n"); - compat_val = (compat_int_t)current->sas_ss_sp; - err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_sp); - DBG(1,"SETUP_RT_FRAME: 2\n"); - compat_val = (compat_int_t)current->sas_ss_size; - err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_size); - DBG(1,"SETUP_RT_FRAME: 3\n"); - compat_val = sas_ss_flags(regs->gr[30]); - err |= __put_user(compat_val, &compat_frame->uc.uc_stack.ss_flags); + err |= __compat_save_altstack( &compat_frame->uc.uc_stack, regs->gr[30]); DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &compat_frame->uc); DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &compat_frame->uc.uc_mcontext); err |= setup_sigcontext32(&compat_frame->uc.uc_mcontext, @@ -280,10 +272,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info, { DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &frame->info); err |= copy_siginfo_to_user(&frame->info, info); - err |= __put_user(current->sas_ss_sp, &frame->uc.uc_stack.ss_sp); - err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size); - err |= __put_user(sas_ss_flags(regs->gr[30]), - &frame->uc.uc_stack.ss_flags); + err |= __save_altstack(&frame->uc.uc_stack, regs->gr[30]); DBG(1,"setup_rt_frame: frame->uc = 0x%p\n", &frame->uc); DBG(1,"setup_rt_frame: frame->uc.uc_mcontext = 0x%p\n", &frame->uc.uc_mcontext); err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, in_syscall); diff --git a/arch/parisc/kernel/signal32.c b/arch/parisc/kernel/signal32.c index 5dede04f2f3e..df79070c3715 100644 --- a/arch/parisc/kernel/signal32.c +++ b/arch/parisc/kernel/signal32.c @@ -148,41 +148,6 @@ sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigacti return ret; } -int -do_sigaltstack32 (const compat_stack_t __user *uss32, compat_stack_t __user *uoss32, unsigned long sp) -{ - compat_stack_t ss32, oss32; - stack_t ss, oss; - stack_t *ssp = NULL, *ossp = NULL; - int ret; - - if (uss32) { - if (copy_from_user(&ss32, uss32, sizeof ss32)) - return -EFAULT; - - ss.ss_sp = (void __user *)(unsigned long)ss32.ss_sp; - ss.ss_flags = ss32.ss_flags; - ss.ss_size = ss32.ss_size; - - ssp = &ss; - } - - if (uoss32) - ossp = &oss; - - KERNEL_SYSCALL(ret, do_sigaltstack, (const stack_t __user *)ssp, (stack_t __user *)ossp, sp); - - if (!ret && uoss32) { - oss32.ss_sp = (unsigned int)(unsigned long)oss.ss_sp; - oss32.ss_flags = oss.ss_flags; - oss32.ss_size = oss.ss_size; - if (copy_to_user(uoss32, &oss32, sizeof *uoss32)) - return -EFAULT; - } - - return ret; -} - long restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user * rf, struct pt_regs *regs) diff --git a/arch/parisc/kernel/signal32.h b/arch/parisc/kernel/signal32.h index 08a88b5349a2..640dc3ec8f5d 100644 --- a/arch/parisc/kernel/signal32.h +++ b/arch/parisc/kernel/signal32.h @@ -23,12 +23,6 @@ typedef compat_uptr_t compat_sighandler_t; -typedef struct compat_sigaltstack { - compat_uptr_t ss_sp; - compat_int_t ss_flags; - compat_size_t ss_size; -} compat_stack_t; - /* Most things should be clean enough to redefine this at will, if care is taken to make libc match. */ @@ -102,8 +96,6 @@ struct compat_rt_sigframe { void sigset_32to64(sigset_t *s64, compat_sigset_t *s32); void sigset_64to32(compat_sigset_t *s32, sigset_t *s64); -int do_sigaltstack32 (const compat_stack_t __user *uss32, - compat_stack_t __user *uoss32, unsigned long sp); long restore_sigcontext32(struct compat_sigcontext __user *sc, struct compat_regfile __user *rf, struct pt_regs *regs); diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S index 54d950b067b7..46dd6efacaaa 100644 --- a/arch/parisc/kernel/syscall_table.S +++ b/arch/parisc/kernel/syscall_table.S @@ -255,7 +255,7 @@ ENTRY_SAME(mremap) ENTRY_SAME(setresuid) ENTRY_SAME(getresuid) /* 165 */ - ENTRY_DIFF(sigaltstack_wrapper) + ENTRY_COMP(sigaltstack) ENTRY_SAME(ni_syscall) /* query_module */ ENTRY_SAME(poll) /* structs contain pointers and an in_addr... */ |