#include <linux/signal.h>
#include <linux/ptrace.h>
#include <linux/personality.h>
-#include <linux/suspend.h>
#include <asm/cacheflush.h>
#include <asm/ucontext.h>
#include <asm/unistd.h>
#include "ptrace.h"
+#include "signal.h"
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
#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.
#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);
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;
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;
return ret;
}
-/*
- * Do a signal return; undo the signal stack.
- */
-struct sigframe
-{
- struct sigcontext sc;
- unsigned long extramask[_NSIG_WORDS-1];
- unsigned long retcode;
-};
-
-struct rt_sigframe
-{
- struct siginfo __user *pinfo;
- void __user *puc;
- struct siginfo info;
- struct ucontext uc;
- unsigned long retcode;
-};
-
#ifdef CONFIG_IWMMXT
/* iwmmxt_area is 0x98 bytes long, preceeded by 8 bytes of signature */
#define IWMMXT_MAGIC0 0x12ef842a
#define IWMMXT_MAGIC1 0x1c07ca71
-static int page_present(struct mm_struct *mm, unsigned long addr, int wr)
-{
- pgd_t *pgd = pgd_offset(mm, addr);
- if (pgd_present(*pgd)) {
- pmd_t *pmd = pmd_offset(pgd, addr);
- if (pmd_present(*pmd)) {
- pte_t *pte = pte_offset_map(pmd, addr);
- return (pte_present(*pte) && (!wr || pte_write(*pte)));
- }
- }
- return 0;
-}
+struct iwmmxt_sigframe {
+ unsigned long magic0;
+ unsigned long magic1;
+ unsigned long storage[0x98/4];
+};
-static int
-preserve_iwmmxt_context(void *iwmmxt_save_area)
+static int preserve_iwmmxt_context(struct iwmmxt_sigframe *frame)
{
- int err = 0;
+ char kbuf[sizeof(*frame) + 8];
+ struct iwmmxt_sigframe *kframe;
/* the iWMMXt context must be 64 bit aligned */
- long *iwmmxt_storage = (long *)(((long)iwmmxt_save_area + 4) & ~7);
-
-again:
- __put_user_error(IWMMXT_MAGIC0, iwmmxt_storage+0, err);
- __put_user_error(IWMMXT_MAGIC1, iwmmxt_storage+1, err);
- /*
- * iwmmxt_task_copy() doesn't check user permissions.
- * Let's do a dummy write on the upper boundary to ensure
- * access to user mem is OK all way up.
- */
- __put_user_error(0, iwmmxt_storage+IWMMXT_STORAGE_SIZE/4-1, err);
- if (!err) {
- /* Let's make sure the user mapping won't disappear under us */
- struct mm_struct *mm = current->mm;
- unsigned long addr = (unsigned long)iwmmxt_storage;
- spin_lock(&mm->page_table_lock);
- if ( !page_present(mm, addr, 1) ||
- !page_present(mm, addr+IWMMXT_STORAGE_SIZE-1, 1) ) {
- /* our user area has gone before grabbing the lock */
- spin_unlock(&mm->page_table_lock);
- goto again;
- }
- iwmmxt_task_copy(current_thread_info(), iwmmxt_storage+2);
- spin_unlock(&mm->page_table_lock);
- return 0;
- }
- return err;
+ kframe = (struct iwmmxt_sigframe *)((unsigned long)(kbuf + 8) & ~7);
+ kframe->magic0 = IWMMXT_MAGIC0;
+ kframe->magic1 = IWMMXT_MAGIC1;
+ iwmmxt_task_copy(current_thread_info(), &kframe->storage);
+ return __copy_to_user(frame, kframe, sizeof(*frame));
}
-static int
-restore_iwmmxt_context(void *iwmmxt_save_area)
+static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
{
- int err = 0;
- long *iwmmxt_storage, magic0, magic1, dummy;
-
- /* the iWMMXt context is 64 bit aligned */
- iwmmxt_storage = (long *)(((long)iwmmxt_save_area + 4) & ~7);
+ char kbuf[sizeof(*frame) + 8];
+ struct iwmmxt_sigframe *kframe;
- /*
- * Validate iWMMXt context signature.
- * Also, iwmmxt_task_restore() doesn't check user permissions.
- * Let's do a dummy write on the upper boundary to ensure
- * access to user mem is OK all way up.
- */
-again:
- __get_user_error(magic0, iwmmxt_storage+0, err);
- __get_user_error(magic1, iwmmxt_storage+1, err);
- if (!err && magic0 == IWMMXT_MAGIC0 && magic1 == IWMMXT_MAGIC1 &&
- !__get_user(dummy, iwmmxt_storage+IWMMXT_STORAGE_SIZE/4-1)) {
- /* Let's make sure the user mapping won't disappear under us */
- struct mm_struct *mm = current->mm;
- unsigned long addr = (unsigned long)iwmmxt_storage;
- spin_lock(&mm->page_table_lock);
- if ( !page_present(mm, addr, 0) ||
- !page_present(mm, addr+IWMMXT_STORAGE_SIZE-1, 0) ) {
- /* our user area has gone before grabbing the lock */
- spin_unlock(&mm->page_table_lock);
- goto again;
- }
- iwmmxt_task_restore(current_thread_info(), iwmmxt_storage+2);
- spin_unlock(&mm->page_table_lock);
- return 0;
- }
- return -1;
+ /* 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->magic0 != IWMMXT_MAGIC0 ||
+ kframe->magic1 != IWMMXT_MAGIC1)
+ return -1;
+ iwmmxt_task_restore(current_thread_info(), &kframe->storage);
+ return 0;
}
#endif
+/*
+ * Auxiliary signal frame. This saves stuff like FP state.
+ * The layout of this structure is not part of the user ABI.
+ */
+struct aux_sigframe {
+#ifdef CONFIG_IWMMXT
+ struct iwmmxt_sigframe iwmmxt;
+#endif
+#ifdef CONFIG_VFP
+ union vfp_state vfp;
+#endif
+};
+
+/*
+ * 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[2];
+ struct aux_sigframe aux __attribute__((aligned(8)));
+};
+
+struct rt_sigframe {
+ struct siginfo __user *pinfo;
+ void __user *puc;
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned long retcode[2];
+ struct aux_sigframe aux __attribute__((aligned(8)));
+};
+
static int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc,
+ struct aux_sigframe __user *aux)
{
int err = 0;
err |= !valid_user_regs(regs);
+#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(&aux->vfp);
+#endif
+
return err;
}
frame = (struct sigframe __user *)regs->ARM_sp;
- if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
goto badframe;
if (__get_user(set.sig[0], &frame->sc.oldmask)
|| (_NSIG_WORDS > 1
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- if (restore_sigcontext(regs, &frame->sc))
- goto badframe;
-
-#ifdef CONFIG_IWMMXT
- if (test_thread_flag(TIF_USING_IWMMXT) && restore_iwmmxt_context(frame+1))
+ if (restore_sigcontext(regs, &frame->sc, &frame->aux))
goto badframe;
-#endif
/* Send SIGTRAP if we're single-stepping */
if (current->ptrace & PT_SINGLESTEP) {
frame = (struct rt_sigframe __user *)regs->ARM_sp;
- if (verify_area(VERIFY_READ, frame, sizeof (*frame)))
+ if (!access_ok(VERIFY_READ, frame, sizeof (*frame)))
goto badframe;
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
+ if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &frame->aux))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->ARM_sp) == -EFAULT)
goto badframe;
-#ifdef CONFIG_IWMMXT
- if (test_thread_flag(TIF_USING_IWMMXT) && restore_iwmmxt_context(frame+1))
- goto badframe;
-#endif
-
/* Send SIGTRAP if we're single-stepping */
if (current->ptrace & PT_SINGLESTEP) {
ptrace_cancel_bpt(current);
}
static int
-setup_sigcontext(struct sigcontext __user *sc, /*struct _fpstate *fpstate,*/
+setup_sigcontext(struct sigcontext __user *sc, struct aux_sigframe __user *aux,
struct pt_regs *regs, unsigned long mask)
{
int err = 0;
__put_user_error(current->thread.address, &sc->fault_address, err);
__put_user_error(mask, &sc->oldmask, err);
+#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(&aux->vfp);
+#endif
+
return err;
}
unsigned long sp = regs->ARM_sp;
void __user *frame;
-#ifdef CONFIG_IWMMXT
- if (test_thread_flag(TIF_USING_IWMMXT))
- framesize = (framesize + 4 + IWMMXT_STORAGE_SIZE) & ~7;
-#endif
-
/*
* This is the X/Open sanctioned signal stack switching.
*/
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;
if (!frame)
return 1;
- err |= setup_sigcontext(&frame->sc, /*&frame->fpstate,*/ regs, set->sig[0]);
+ err |= setup_sigcontext(&frame->sc, &frame->aux, regs, set->sig[0]);
if (_NSIG_WORDS > 1) {
err |= __copy_to_user(frame->extramask, &set->sig[1],
sizeof(frame->extramask));
}
-#ifdef CONFIG_IWMMXT
- if (test_thread_flag(TIF_USING_IWMMXT))
- err |= preserve_iwmmxt_context(frame+1);
-#endif
-
if (err == 0)
- err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ err = setup_return(regs, ka, frame->retcode, frame, usig);
return err;
}
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,*/
+ err |= setup_sigcontext(&frame->uc.uc_mcontext, &frame->aux,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
-#ifdef CONFIG_IWMMXT
- if (test_thread_flag(TIF_USING_IWMMXT))
- err |= preserve_iwmmxt_context(frame+1);
-#endif
-
if (err == 0)
- err = setup_return(regs, ka, &frame->retcode, frame, usig);
+ err = setup_return(regs, ka, frame->retcode, frame, usig);
if (err == 0) {
/*
*/
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)
- return;
+ recalc_sigpending();
+ spin_unlock_irq(&tsk->sighand->siglock);
- force_sigsegv(sig, tsk);
}
/*
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);
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