X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Farm%2Fkernel%2Fsignal.c;h=3843d3bab2ddc4d2e7eb536cc8380ee3d420d5f5;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=d214e8d494f60354b1fe9571c4decbafc2da38f1;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git

diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index d214e8d49..3843d3bab 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -7,19 +7,20 @@
  * it under the terms of the GNU General Public License version 2 as
  * published by the Free Software Foundation.
  */
-#include <linux/config.h>
 #include <linux/errno.h>
 #include <linux/signal.h>
 #include <linux/ptrace.h>
 #include <linux/personality.h>
-#include <linux/suspend.h>
+#include <linux/freezer.h>
 
+#include <asm/elf.h>
 #include <asm/cacheflush.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
 
 #include "ptrace.h"
+#include "signal.h"
 
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
@@ -29,6 +30,12 @@
 #define SWI_SYS_SIGRETURN	(0xef000000|(__NR_sigreturn))
 #define SWI_SYS_RT_SIGRETURN	(0xef000000|(__NR_rt_sigreturn))
 
+/*
+ * With EABI, the syscall number has to be loaded into r7.
+ */
+#define MOV_R7_NR_SIGRETURN	(0xe3a07000 | (__NR_sigreturn - __NR_SYSCALL_BASE))
+#define MOV_R7_NR_RT_SIGRETURN	(0xe3a07000 | (__NR_rt_sigreturn - __NR_SYSCALL_BASE))
+
 /*
  * For Thumb syscalls, we pass the syscall number via r7.  We therefore
  * need two 16-bit instructions.
@@ -36,9 +43,9 @@
 #define SWI_THUMB_SIGRETURN	(0xdf00 << 16 | 0x2700 | (__NR_sigreturn - __NR_SYSCALL_BASE))
 #define SWI_THUMB_RT_SIGRETURN	(0xdf00 << 16 | 0x2700 | (__NR_rt_sigreturn - __NR_SYSCALL_BASE))
 
-static const unsigned long retcodes[4] = {
-	SWI_SYS_SIGRETURN,	SWI_THUMB_SIGRETURN,
-	SWI_SYS_RT_SIGRETURN,	SWI_THUMB_RT_SIGRETURN
+const unsigned long sigreturn_codes[7] = {
+	MOV_R7_NR_SIGRETURN,    SWI_SYS_SIGRETURN,    SWI_THUMB_SIGRETURN,
+	MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
 };
 
 static int do_signal(sigset_t *oldset, struct pt_regs * regs, int syscall);
@@ -103,7 +110,7 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
 
 	if (act) {
 		old_sigset_t mask;
-		if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
+		if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
 		    __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
 			return -EFAULT;
@@ -115,7 +122,7 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
 	if (!ret && oact) {
-		if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
+		if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
 		    __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
 			return -EFAULT;
@@ -126,57 +133,138 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
 	return ret;
 }
 
+#ifdef CONFIG_CRUNCH
+static int preserve_crunch_context(struct crunch_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct crunch_sigframe *kframe;
+
+	/* the crunch context must be 64 bit aligned */
+	kframe = (struct crunch_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	kframe->magic = CRUNCH_MAGIC;
+	kframe->size = CRUNCH_STORAGE_SIZE;
+	crunch_task_copy(current_thread_info(), &kframe->storage);
+	return __copy_to_user(frame, kframe, sizeof(*frame));
+}
+
+static int restore_crunch_context(struct crunch_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct crunch_sigframe *kframe;
+
+	/* the crunch context must be 64 bit aligned */
+	kframe = (struct crunch_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	if (__copy_from_user(kframe, frame, sizeof(*frame)))
+		return -1;
+	if (kframe->magic != CRUNCH_MAGIC ||
+	    kframe->size != CRUNCH_STORAGE_SIZE)
+		return -1;
+	crunch_task_restore(current_thread_info(), &kframe->storage);
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_IWMMXT
+
+static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct iwmmxt_sigframe *kframe;
+
+	/* the iWMMXt context must be 64 bit aligned */
+	kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	kframe->magic = IWMMXT_MAGIC;
+	kframe->size = IWMMXT_STORAGE_SIZE;
+	iwmmxt_task_copy(current_thread_info(), &kframe->storage);
+	return __copy_to_user(frame, kframe, sizeof(*frame));
+}
+
+static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
+{
+	char kbuf[sizeof(*frame) + 8];
+	struct iwmmxt_sigframe *kframe;
+
+	/* the iWMMXt context must be 64 bit aligned */
+	kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+	if (__copy_from_user(kframe, frame, sizeof(*frame)))
+		return -1;
+	if (kframe->magic != IWMMXT_MAGIC ||
+	    kframe->size != IWMMXT_STORAGE_SIZE)
+		return -1;
+	iwmmxt_task_restore(current_thread_info(), &kframe->storage);
+	return 0;
+}
+
+#endif
+
 /*
- * Do a signal return; undo the signal stack.
+ * Do a signal return; undo the signal stack.  These are aligned to 64-bit.
  */
-struct sigframe
-{
-	struct sigcontext sc;
-	unsigned long extramask[_NSIG_WORDS-1];
-	unsigned long retcode;
+struct sigframe {
+	struct ucontext uc;
+	unsigned long retcode[2];
 };
 
-struct rt_sigframe
-{
-	struct siginfo __user *pinfo;
-	void __user *puc;
+struct rt_sigframe {
 	struct siginfo info;
-	struct ucontext uc;
-	unsigned long retcode;
+	struct sigframe sig;
 };
 
-static int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+static int restore_sigframe(struct pt_regs *regs, struct sigframe __user *sf)
 {
-	int err = 0;
+	struct aux_sigframe __user *aux;
+	sigset_t set;
+	int err;
+
+	err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
+	if (err == 0) {
+		sigdelsetmask(&set, ~_BLOCKABLE);
+		spin_lock_irq(&current->sighand->siglock);
+		current->blocked = set;
+		recalc_sigpending();
+		spin_unlock_irq(&current->sighand->siglock);
+	}
 
-	__get_user_error(regs->ARM_r0, &sc->arm_r0, err);
-	__get_user_error(regs->ARM_r1, &sc->arm_r1, err);
-	__get_user_error(regs->ARM_r2, &sc->arm_r2, err);
-	__get_user_error(regs->ARM_r3, &sc->arm_r3, err);
-	__get_user_error(regs->ARM_r4, &sc->arm_r4, err);
-	__get_user_error(regs->ARM_r5, &sc->arm_r5, err);
-	__get_user_error(regs->ARM_r6, &sc->arm_r6, err);
-	__get_user_error(regs->ARM_r7, &sc->arm_r7, err);
-	__get_user_error(regs->ARM_r8, &sc->arm_r8, err);
-	__get_user_error(regs->ARM_r9, &sc->arm_r9, err);
-	__get_user_error(regs->ARM_r10, &sc->arm_r10, err);
-	__get_user_error(regs->ARM_fp, &sc->arm_fp, err);
-	__get_user_error(regs->ARM_ip, &sc->arm_ip, err);
-	__get_user_error(regs->ARM_sp, &sc->arm_sp, err);
-	__get_user_error(regs->ARM_lr, &sc->arm_lr, err);
-	__get_user_error(regs->ARM_pc, &sc->arm_pc, err);
-	__get_user_error(regs->ARM_cpsr, &sc->arm_cpsr, err);
+	__get_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
+	__get_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
+	__get_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
+	__get_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
+	__get_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
+	__get_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
+	__get_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
+	__get_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
+	__get_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
+	__get_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
+	__get_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
+	__get_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
+	__get_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
+	__get_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
+	__get_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
+	__get_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
+	__get_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
 
 	err |= !valid_user_regs(regs);
 
+	aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
+#ifdef CONFIG_CRUNCH
+	if (err == 0)
+		err |= restore_crunch_context(&aux->crunch);
+#endif
+#ifdef CONFIG_IWMMXT
+	if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
+		err |= restore_iwmmxt_context(&aux->iwmmxt);
+#endif
+#ifdef CONFIG_VFP
+//	if (err == 0)
+//		err |= vfp_restore_state(&sf->aux.vfp);
+#endif
+
 	return err;
 }
 
 asmlinkage int sys_sigreturn(struct pt_regs *regs)
 {
 	struct sigframe __user *frame;
-	sigset_t set;
 
 	/* Always make any pending restarted system calls return -EINTR */
 	current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -191,21 +279,10 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
 
 	frame = (struct sigframe __user *)regs->ARM_sp;
 
-	if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
-		goto badframe;
-	if (__get_user(set.sig[0], &frame->sc.oldmask)
-	    || (_NSIG_WORDS > 1
-	        && __copy_from_user(&set.sig[1], &frame->extramask,
-				    sizeof(frame->extramask))))
+	if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
 		goto badframe;
 
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-	current->blocked = set;
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	if (restore_sigcontext(regs, &frame->sc))
+	if (restore_sigframe(regs, frame))
 		goto badframe;
 
 	/* Send SIGTRAP if we're single-stepping */
@@ -224,7 +301,6 @@ badframe:
 asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 {
 	struct rt_sigframe __user *frame;
-	sigset_t set;
 
 	/* Always make any pending restarted system calls return -EINTR */
 	current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -239,21 +315,13 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
 
 	frame = (struct rt_sigframe __user *)regs->ARM_sp;
 
-	if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
-		goto badframe;
-	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
+	if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
 		goto badframe;
 
-	sigdelsetmask(&set, ~_BLOCKABLE);
-	spin_lock_irq(&current->sighand->siglock);
-	current->blocked = set;
-	recalc_sigpending();
-	spin_unlock_irq(&current->sighand->siglock);
-
-	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+	if (restore_sigframe(regs, &frame->sig))
 		goto badframe;
 
-	if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
+	if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
 		goto badframe;
 
 	/* Send SIGTRAP if we're single-stepping */
@@ -270,33 +338,50 @@ badframe:
 }
 
 static int
-setup_sigcontext(struct sigcontext __user *sc, /*struct _fpstate *fpstate,*/
-		 struct pt_regs *regs, unsigned long mask)
+setup_sigframe(struct sigframe __user *sf, struct pt_regs *regs, sigset_t *set)
 {
+	struct aux_sigframe __user *aux;
 	int err = 0;
 
-	__put_user_error(regs->ARM_r0, &sc->arm_r0, err);
-	__put_user_error(regs->ARM_r1, &sc->arm_r1, err);
-	__put_user_error(regs->ARM_r2, &sc->arm_r2, err);
-	__put_user_error(regs->ARM_r3, &sc->arm_r3, err);
-	__put_user_error(regs->ARM_r4, &sc->arm_r4, err);
-	__put_user_error(regs->ARM_r5, &sc->arm_r5, err);
-	__put_user_error(regs->ARM_r6, &sc->arm_r6, err);
-	__put_user_error(regs->ARM_r7, &sc->arm_r7, err);
-	__put_user_error(regs->ARM_r8, &sc->arm_r8, err);
-	__put_user_error(regs->ARM_r9, &sc->arm_r9, err);
-	__put_user_error(regs->ARM_r10, &sc->arm_r10, err);
-	__put_user_error(regs->ARM_fp, &sc->arm_fp, err);
-	__put_user_error(regs->ARM_ip, &sc->arm_ip, err);
-	__put_user_error(regs->ARM_sp, &sc->arm_sp, err);
-	__put_user_error(regs->ARM_lr, &sc->arm_lr, err);
-	__put_user_error(regs->ARM_pc, &sc->arm_pc, err);
-	__put_user_error(regs->ARM_cpsr, &sc->arm_cpsr, err);
-
-	__put_user_error(current->thread.trap_no, &sc->trap_no, err);
-	__put_user_error(current->thread.error_code, &sc->error_code, err);
-	__put_user_error(current->thread.address, &sc->fault_address, err);
-	__put_user_error(mask, &sc->oldmask, err);
+	__put_user_error(regs->ARM_r0, &sf->uc.uc_mcontext.arm_r0, err);
+	__put_user_error(regs->ARM_r1, &sf->uc.uc_mcontext.arm_r1, err);
+	__put_user_error(regs->ARM_r2, &sf->uc.uc_mcontext.arm_r2, err);
+	__put_user_error(regs->ARM_r3, &sf->uc.uc_mcontext.arm_r3, err);
+	__put_user_error(regs->ARM_r4, &sf->uc.uc_mcontext.arm_r4, err);
+	__put_user_error(regs->ARM_r5, &sf->uc.uc_mcontext.arm_r5, err);
+	__put_user_error(regs->ARM_r6, &sf->uc.uc_mcontext.arm_r6, err);
+	__put_user_error(regs->ARM_r7, &sf->uc.uc_mcontext.arm_r7, err);
+	__put_user_error(regs->ARM_r8, &sf->uc.uc_mcontext.arm_r8, err);
+	__put_user_error(regs->ARM_r9, &sf->uc.uc_mcontext.arm_r9, err);
+	__put_user_error(regs->ARM_r10, &sf->uc.uc_mcontext.arm_r10, err);
+	__put_user_error(regs->ARM_fp, &sf->uc.uc_mcontext.arm_fp, err);
+	__put_user_error(regs->ARM_ip, &sf->uc.uc_mcontext.arm_ip, err);
+	__put_user_error(regs->ARM_sp, &sf->uc.uc_mcontext.arm_sp, err);
+	__put_user_error(regs->ARM_lr, &sf->uc.uc_mcontext.arm_lr, err);
+	__put_user_error(regs->ARM_pc, &sf->uc.uc_mcontext.arm_pc, err);
+	__put_user_error(regs->ARM_cpsr, &sf->uc.uc_mcontext.arm_cpsr, err);
+
+	__put_user_error(current->thread.trap_no, &sf->uc.uc_mcontext.trap_no, err);
+	__put_user_error(current->thread.error_code, &sf->uc.uc_mcontext.error_code, err);
+	__put_user_error(current->thread.address, &sf->uc.uc_mcontext.fault_address, err);
+	__put_user_error(set->sig[0], &sf->uc.uc_mcontext.oldmask, err);
+
+	err |= __copy_to_user(&sf->uc.uc_sigmask, set, sizeof(*set));
+
+	aux = (struct aux_sigframe __user *) sf->uc.uc_regspace;
+#ifdef CONFIG_CRUNCH
+	if (err == 0)
+		err |= preserve_crunch_context(&aux->crunch);
+#endif
+#ifdef CONFIG_IWMMXT
+	if (err == 0 && test_thread_flag(TIF_USING_IWMMXT))
+		err |= preserve_iwmmxt_context(&aux->iwmmxt);
+#endif
+#ifdef CONFIG_VFP
+//	if (err == 0)
+//		err |= vfp_save_state(&sf->aux.vfp);
+#endif
+	__put_user_error(0, &aux->end_magic, err);
 
 	return err;
 }
@@ -305,6 +390,7 @@ static inline void __user *
 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
 {
 	unsigned long sp = regs->ARM_sp;
+	void __user *frame;
 
 	/*
 	 * This is the X/Open sanctioned signal stack switching.
@@ -315,7 +401,15 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, int framesize)
 	/*
 	 * ATPCS B01 mandates 8-byte alignment
 	 */
-	return (void __user *)((sp - framesize) & ~7);
+	frame = (void __user *)((sp - framesize) & ~7);
+
+	/*
+	 * Check that we can actually write to the signal frame.
+	 */
+	if (!access_ok(VERIFY_WRITE, frame, framesize))
+		frame = NULL;
+
+	return frame;
 }
 
 static int
@@ -351,22 +445,31 @@ setup_return(struct pt_regs *regs, struct k_sigaction *ka,
 	if (ka->sa.sa_flags & SA_RESTORER) {
 		retcode = (unsigned long)ka->sa.sa_restorer;
 	} else {
-		unsigned int idx = thumb;
+		unsigned int idx = thumb << 1;
 
 		if (ka->sa.sa_flags & SA_SIGINFO)
-			idx += 2;
+			idx += 3;
 
-		if (__put_user(retcodes[idx], rc))
+		if (__put_user(sigreturn_codes[idx],   rc) ||
+		    __put_user(sigreturn_codes[idx+1], rc+1))
 			return 1;
 
-		/*
-		 * Ensure that the instruction cache sees
-		 * the return code written onto the stack.
-		 */
-		flush_icache_range((unsigned long)rc,
-				   (unsigned long)(rc + 1));
-
-		retcode = ((unsigned long)rc) + thumb;
+		if (cpsr & MODE32_BIT) {
+			/*
+			 * 32-bit code can use the new high-page
+			 * signal return code support.
+			 */
+			retcode = KERN_SIGRETURN_CODE + (idx << 2) + thumb;
+		} else {
+			/*
+			 * Ensure that the instruction cache sees
+			 * the return code written onto the stack.
+			 */
+			flush_icache_range((unsigned long)rc,
+					   (unsigned long)(rc + 2));
+
+			retcode = ((unsigned long)rc) + thumb;
+		}
 	}
 
 	regs->ARM_r0 = usig;
@@ -384,18 +487,17 @@ setup_frame(int usig, struct k_sigaction *ka, sigset_t *set, struct pt_regs *reg
 	struct sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame));
 	int err = 0;
 
-	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+	if (!frame)
 		return 1;
 
-	err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
-
-	if (_NSIG_WORDS > 1) {
-		err |= __copy_to_user(frame->extramask, &set->sig[1],
-				      sizeof(frame->extramask));
-	}
+	/*
+	 * Set uc.uc_flags to a value which sc.trap_no would never have.
+	 */
+	__put_user_error(0x5ac3c35a, &frame->uc.uc_flags, err);
 
+	err |= setup_sigframe(frame, regs, set);
 	if (err == 0)
-		err = setup_return(regs, ka, &frame->retcode, frame, usig);
+		err = setup_return(regs, ka, frame->retcode, frame, usig);
 
 	return err;
 }
@@ -408,28 +510,23 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 	stack_t stack;
 	int err = 0;
 
-	if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
+	if (!frame)
 		return 1;
 
-	__put_user_error(&frame->info, &frame->pinfo, err);
-	__put_user_error(&frame->uc, &frame->puc, err);
 	err |= copy_siginfo_to_user(&frame->info, info);
 
-	__put_user_error(0, &frame->uc.uc_flags, err);
-	__put_user_error(NULL, &frame->uc.uc_link, err);
+	__put_user_error(0, &frame->sig.uc.uc_flags, err);
+	__put_user_error(NULL, &frame->sig.uc.uc_link, err);
 
 	memset(&stack, 0, sizeof(stack));
 	stack.ss_sp = (void __user *)current->sas_ss_sp;
 	stack.ss_flags = sas_ss_flags(regs->ARM_sp);
 	stack.ss_size = current->sas_ss_size;
-	err |= __copy_to_user(&frame->uc.uc_stack, &stack, sizeof(stack));
-
-	err |= setup_sigcontext(&frame->uc.uc_mcontext, /*&frame->fpstate,*/
-				regs, set->sig[0]);
-	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
+	err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
 
+	err |= setup_sigframe(&frame->sig, regs, set);
 	if (err == 0)
-		err = setup_return(regs, ka, &frame->retcode, frame, usig);
+		err = setup_return(regs, ka, frame->sig.retcode, frame, usig);
 
 	if (err == 0) {
 		/*
@@ -438,7 +535,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
 		 *   -- Peter Maydell <pmaydell@chiark.greenend.org.uk> 2000-12-06
 		 */
 		regs->ARM_r1 = (unsigned long)&frame->info;
-		regs->ARM_r2 = (unsigned long)&frame->uc;
+		regs->ARM_r2 = (unsigned long)&frame->sig.uc;
 	}
 
 	return err;
@@ -454,12 +551,12 @@ static inline void restart_syscall(struct pt_regs *regs)
  * OK, we're invoking a handler
  */	
 static void
-handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
+handle_signal(unsigned long sig, struct k_sigaction *ka,
+	      siginfo_t *info, sigset_t *oldset,
 	      struct pt_regs * regs, int syscall)
 {
 	struct thread_info *thread = current_thread_info();
 	struct task_struct *tsk = current;
-	struct k_sigaction *ka = &tsk->sighand->action[sig-1];
 	int usig = sig;
 	int ret;
 
@@ -502,27 +599,22 @@ handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
 	 */
 	ret |= !valid_user_regs(regs);
 
+	if (ret != 0) {
+		force_sigsegv(sig, tsk);
+		return;
+	}
+
 	/*
-	 * Block the signal if we were unsuccessful.
+	 * Block the signal if we were successful.
 	 */
-	if (ret != 0 || !(ka->sa.sa_flags & SA_NODEFER)) {
-		spin_lock_irq(&tsk->sighand->siglock);
-		sigorsets(&tsk->blocked, &tsk->blocked,
-			  &ka->sa.sa_mask);
+	spin_lock_irq(&tsk->sighand->siglock);
+	sigorsets(&tsk->blocked, &tsk->blocked,
+		  &ka->sa.sa_mask);
+	if (!(ka->sa.sa_flags & SA_NODEFER))
 		sigaddset(&tsk->blocked, sig);
-		recalc_sigpending();
-		spin_unlock_irq(&tsk->sighand->siglock);
-	}
-
-	if (ret == 0) {
-		if (ka->sa.sa_flags & SA_ONESHOT)
-			ka->sa.sa_handler = SIG_DFL;
-		return;
-	}
+	recalc_sigpending();
+	spin_unlock_irq(&tsk->sighand->siglock);
 
-	if (sig == SIGSEGV)
-		ka->sa.sa_handler = SIG_DFL;
-	force_sig(SIGSEGV, tsk);
 }
 
 /*
@@ -536,6 +628,7 @@ handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
  */
 static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 {
+	struct k_sigaction ka;
 	siginfo_t info;
 	int signr;
 
@@ -548,17 +641,15 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 	if (!user_mode(regs))
 		return 0;
 
-	if (current->flags & PF_FREEZE) {
-		refrigerator(0);
+	if (try_to_freeze())
 		goto no_signal;
-	}
 
 	if (current->ptrace & PT_SINGLESTEP)
 		ptrace_cancel_bpt(current);
 
-	signr = get_signal_to_deliver(&info, regs, NULL);
+	signr = get_signal_to_deliver(&info, &ka, regs, NULL);
 	if (signr > 0) {
-		handle_signal(signr, &info, oldset, regs, syscall);
+		handle_signal(signr, &ka, &info, oldset, regs, syscall);
 		if (current->ptrace & PT_SINGLESTEP)
 			ptrace_set_bpt(current);
 		return 1;
@@ -571,17 +662,33 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 	if (syscall) {
 		if (regs->ARM_r0 == -ERESTART_RESTARTBLOCK) {
 			if (thumb_mode(regs)) {
-				regs->ARM_r7 = __NR_restart_syscall;
+				regs->ARM_r7 = __NR_restart_syscall - __NR_SYSCALL_BASE;
 				regs->ARM_pc -= 2;
 			} else {
+#if defined(CONFIG_AEABI) && !defined(CONFIG_OABI_COMPAT)
+				regs->ARM_r7 = __NR_restart_syscall;
+				regs->ARM_pc -= 4;
+#else
 				u32 __user *usp;
+				u32 swival = __NR_restart_syscall;
 
 				regs->ARM_sp -= 12;
 				usp = (u32 __user *)regs->ARM_sp;
 
+				/*
+				 * Either we supports OABI only, or we have
+				 * EABI with the OABI compat layer enabled.
+				 * In the later case we don't know if user
+				 * space is EABI or not, and if not we must
+				 * not clobber r7.  Always using the OABI
+				 * syscall solves that issue and works for
+				 * all those cases.
+				 */
+				swival = swival - __NR_SYSCALL_BASE + __NR_OABI_SYSCALL_BASE;
+
 				put_user(regs->ARM_pc, &usp[0]);
 				/* swi __NR_restart_syscall */
-				put_user(0xef000000 | __NR_restart_syscall, &usp[1]);
+				put_user(0xef000000 | swival, &usp[1]);
 				/* ldr	pc, [sp], #12 */
 				put_user(0xe49df00c, &usp[2]);
 
@@ -589,6 +696,7 @@ static int do_signal(sigset_t *oldset, struct pt_regs *regs, int syscall)
 						   (unsigned long)(usp + 3));
 
 				regs->ARM_pc = regs->ARM_sp + 4;
+#endif
 			}
 		}
 		if (regs->ARM_r0 == -ERESTARTNOHAND ||