#include <asm/uaccess.h>
#include <asm/pgalloc.h>
#include <asm/cacheflush.h>
+#include <asm/asm-offsets.h>
#ifdef CONFIG_COMPAT
#include <linux/compat.h>
#endif
asmlinkage int
-sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize, struct pt_regs *regs)
+sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, struct pt_regs *regs)
{
sigset_t saveset, newset;
#ifdef __LP64__
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(compat_sigset_t))
return -EINVAL;
- if (copy_from_user(&newset32, (compat_sigset_t *)unewset, sizeof(newset32)))
+ if (copy_from_user(&newset32, (compat_sigset_t __user *)unewset, sizeof(newset32)))
return -EFAULT;
sigset_32to64(&newset,&newset32);
#define INSN_DIE_HORRIBLY 0x68000ccc /* stw %r0,0x666(%sr0,%r0) */
static long
-restore_sigcontext(struct sigcontext *sc, struct pt_regs *regs)
+restore_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs)
{
long err = 0;
void
sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
{
- struct rt_sigframe *frame;
+ struct rt_sigframe __user *frame;
struct siginfo si;
sigset_t set;
unsigned long usp = (regs->gr[30] & ~(0x01UL));
unsigned long sigframe_size = PARISC_RT_SIGFRAME_SIZE;
#ifdef __LP64__
compat_sigset_t compat_set;
- struct compat_rt_sigframe * compat_frame;
+ struct compat_rt_sigframe __user * compat_frame;
if(personality(current->personality) == PER_LINUX32)
sigframe_size = PARISC_RT_SIGFRAME_SIZE32;
/* Unwind the user stack to get the rt_sigframe structure. */
- frame = (struct rt_sigframe *)
+ frame = (struct rt_sigframe __user *)
(usp - sigframe_size);
DBG(2,"sys_rt_sigreturn: frame is %p\n", frame);
#ifdef __LP64__
- compat_frame = (struct compat_rt_sigframe *)frame;
+ compat_frame = (struct compat_rt_sigframe __user *)frame;
if(personality(current->personality) == PER_LINUX32){
DBG(2,"sys_rt_sigreturn: ELF32 process.\n");
* Set up a signal frame.
*/
-static inline void *
+static inline void __user *
get_sigframe(struct k_sigaction *ka, unsigned long sp, size_t frame_size)
{
/*FIXME: ELF32 vs. ELF64 has different frame_size, but since we
sp = current->sas_ss_sp; /* Stacks grow up! */
DBG(1,"get_sigframe: Returning sp = %#lx\n", (unsigned long)sp);
- return (void *) sp; /* Stacks grow up. Fun. */
+ return (void __user *) sp; /* Stacks grow up. Fun. */
}
static long
-setup_sigcontext(struct sigcontext *sc, struct pt_regs *regs, int in_syscall)
+setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs, int in_syscall)
{
unsigned long flags = 0;
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs, int in_syscall)
{
- struct rt_sigframe *frame;
+ struct rt_sigframe __user *frame;
unsigned long rp, usp;
unsigned long haddr, sigframe_size;
- struct siginfo si;
int err = 0;
#ifdef __LP64__
compat_int_t compat_val;
- struct compat_rt_sigframe * compat_frame;
+ struct compat_rt_sigframe __user * compat_frame;
compat_sigset_t compat_set;
#endif
#ifdef __LP64__
- compat_frame = (struct compat_rt_sigframe *)frame;
+ compat_frame = (struct compat_rt_sigframe __user *)frame;
if(personality(current->personality) == PER_LINUX32) {
DBG(1,"setup_rt_frame: frame->info = 0x%p\n", &compat_frame->info);
- err |= compat_copy_siginfo_to_user(&compat_frame->info, 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);
goto give_sigsegv;
/* Set up to return from userspace. If provided, use a stub
- already in userspace. */
+ already in userspace. The first words of tramp are used to
+ save the previous sigrestartblock trampoline that might be
+ on the stack. We start the sigreturn trampoline at
+ SIGRESTARTBLOCK_TRAMP+X. */
err |= __put_user(in_syscall ? INSN_LDI_R25_1 : INSN_LDI_R25_0,
- &frame->tramp[SIGRETURN_TRAMP+0]);
- err |= __put_user(INSN_LDI_R20, &frame->tramp[SIGRETURN_TRAMP+1]);
- err |= __put_user(INSN_BLE_SR2_R0, &frame->tramp[SIGRETURN_TRAMP+2]);
- err |= __put_user(INSN_NOP, &frame->tramp[SIGRETURN_TRAMP+3]);
+ &frame->tramp[SIGRESTARTBLOCK_TRAMP+0]);
+ err |= __put_user(INSN_LDI_R20,
+ &frame->tramp[SIGRESTARTBLOCK_TRAMP+1]);
+ err |= __put_user(INSN_BLE_SR2_R0,
+ &frame->tramp[SIGRESTARTBLOCK_TRAMP+2]);
+ err |= __put_user(INSN_NOP, &frame->tramp[SIGRESTARTBLOCK_TRAMP+3]);
#if DEBUG_SIG
/* Assert that we're flushing in the correct space... */
}
#endif
- flush_user_dcache_range((unsigned long) &frame->tramp[SIGRETURN_TRAMP],
+ flush_user_dcache_range((unsigned long) &frame->tramp[0],
(unsigned long) &frame->tramp[TRAMP_SIZE]);
- flush_user_icache_range((unsigned long) &frame->tramp[SIGRETURN_TRAMP],
+ flush_user_icache_range((unsigned long) &frame->tramp[0],
(unsigned long) &frame->tramp[TRAMP_SIZE]);
- rp = (unsigned long) &frame->tramp[SIGRETURN_TRAMP];
+ /* TRAMP Words 0-4, Lenght 5 = SIGRESTARTBLOCK_TRAMP
+ * TRAMP Words 5-9, Length 4 = SIGRETURN_TRAMP
+ * So the SIGRETURN_TRAMP is at the end of SIGRESTARTBLOCK_TRAMP
+ */
+ rp = (unsigned long) &frame->tramp[SIGRESTARTBLOCK_TRAMP];
if (err)
goto give_sigsegv;
#endif
if (haddr & PA_PLABEL_FDESC) {
Elf32_Fdesc fdesc;
- Elf32_Fdesc *ufdesc = (Elf32_Fdesc *)A(haddr & ~3);
+ Elf32_Fdesc __user *ufdesc = (Elf32_Fdesc __user *)A(haddr & ~3);
err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
#ifdef __LP64__
} else {
Elf64_Fdesc fdesc;
- Elf64_Fdesc *ufdesc = (Elf64_Fdesc *)A(haddr & ~3);
+ Elf64_Fdesc __user *ufdesc = (Elf64_Fdesc __user *)A(haddr & ~3);
err = __copy_from_user(&fdesc, ufdesc, sizeof(fdesc));
psw |= PSW_W;
#endif
+ /* If we are singlestepping, arrange a trap to be delivered
+ when we return to userspace. Note the semantics -- we
+ should trap before the first insn in the handler is
+ executed. Ref:
+ http://sources.redhat.com/ml/gdb/2004-11/msg00245.html
+ */
+ if (pa_psw(current)->r) {
+ pa_psw(current)->r = 0;
+ psw |= PSW_R;
+ mtctl(-1, 0);
+ }
+
regs->gr[0] = psw;
regs->iaoq[0] = haddr | 3;
regs->iaoq[1] = regs->iaoq[0] + 4;
give_sigsegv:
DBG(1,"setup_rt_frame: sending SIGSEGV\n");
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- si.si_signo = SIGSEGV;
- si.si_errno = 0;
- si.si_code = SI_KERNEL;
- si.si_pid = current->pid;
- si.si_uid = current->uid;
- si.si_addr = frame;
- force_sig_info(SIGSEGV, &si, current);
+ force_sigsegv(sig, current);
return 0;
}
*/
static long
-handle_signal(unsigned long sig, siginfo_t *info, sigset_t *oldset,
- struct pt_regs *regs, int in_syscall)
+handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
+ sigset_t *oldset, struct pt_regs *regs, int in_syscall)
{
- struct k_sigaction *ka = ¤t->sighand->action[sig-1];
-
DBG(1,"handle_signal: sig=%ld, ka=%p, info=%p, oldset=%p, regs=%p\n",
sig, ka, info, oldset, regs);
if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
return 0;
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
- if (!(ka->sa.sa_flags & SA_NODEFER)) {
- spin_lock_irq(¤t->sighand->siglock);
- sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ spin_lock_irq(¤t->sighand->siglock);
+ sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(¤t->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
- }
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
return 1;
}
do_signal(sigset_t *oldset, struct pt_regs *regs, int in_syscall)
{
siginfo_t info;
- struct k_sigaction *ka;
+ struct k_sigaction ka;
int signr;
DBG(1,"\ndo_signal: oldset=0x%p, regs=0x%p, sr7 %#lx, in_syscall=%d\n",
oldset->sig[0], oldset->sig[1]);
- signr = get_signal_to_deliver(&info, regs, NULL);
- DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
+ /* May need to force signal if handle_signal failed to deliver */
+ while (1) {
+
+ signr = get_signal_to_deliver(&info, &ka, regs, NULL);
+ DBG(3,"do_signal: signr = %d, regs->gr[28] = %ld\n", signr, regs->gr[28]);
- if (signr > 0) {
+ if (signr <= 0)
+ break;
+
/* Restart a system call if necessary. */
if (in_syscall) {
/* Check the return code */
break;
case -ERESTARTSYS:
- ka = ¤t->sighand->action[signr-1];
- if (!(ka->sa.sa_flags & SA_RESTART)) {
+ if (!(ka.sa.sa_flags & SA_RESTART)) {
DBG(1,"ERESTARTSYS: putting -EINTR\n");
regs->gr[28] = -EINTR;
break;
/* fallthrough */
case -ERESTARTNOINTR:
/* A syscall is just a branch, so all
- we have to do is fiddle the return
- pointer. */
+ we have to do is fiddle the return pointer. */
regs->gr[31] -= 8; /* delayed branching */
/* Preserve original r28. */
regs->gr[28] = regs->orig_r28;
/* Whee! Actually deliver the signal. If the
delivery failed, we need to continue to iterate in
this loop so we can deliver the SIGSEGV... */
- if (handle_signal(signr, &info, oldset, regs, in_syscall)) {
+ if (handle_signal(signr, &info, &ka, oldset, regs, in_syscall)) {
DBG(1,KERN_DEBUG "do_signal: Exit (success), regs->gr[28] = %ld\n",
regs->gr[28]);
return 1;
}
}
+ /* end of while(1) looping forever if we can't force a signal */
/* Did we come from a system call? */
if (in_syscall) {
put_user(0xe0008200, &usp[3]);
put_user(0x34140000, &usp[4]);
- /* Stack is 64-byte aligned, and we only
- * need to flush 1 cache line */
- asm("fdc 0(%%sr3, %0)\n"
- "fic 0(%%sr3, %0)\n"
+ /* Stack is 64-byte aligned, and we only need
+ * to flush 1 cache line.
+ * Flushing one cacheline is cheap.
+ * "sync" on bigger (> 4 way) boxes is not.
+ */
+ asm("fdc %%r0(%%sr3, %0)\n"
+ "sync\n"
+ "fic %%r0(%%sr3, %0)\n"
"sync\n"
: : "r"(regs->gr[30]));
git://git.onelab.eu / linux-2.6.git / blobdiff