#include <asm/proto.h>
#include <asm/vsyscall32.h>
-#define ptr_to_u32(x) ((u32)(u64)(x)) /* avoid gcc warning */
-
#define DEBUG_SIG 0
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-void signal_fault(struct pt_regs *regs, void *frame, char *where);
+void signal_fault(struct pt_regs *regs, void __user *frame, char *where);
-int ia32_copy_siginfo_to_user(siginfo_t32 __user *to, siginfo_t *from)
+int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{
int err;
- if (!access_ok (VERIFY_WRITE, to, sizeof(siginfo_t32)))
+ if (!access_ok (VERIFY_WRITE, to, sizeof(compat_siginfo_t)))
return -EFAULT;
/* If you change siginfo_t structure, please make sure that
- this code is fixed accordingly.
- It should never copy any pad contained in the structure
- to avoid security leaks, but must copy the generic
- 3 ints plus the relevant union member. */
- err = __put_user(from->si_signo, &to->si_signo);
- err |= __put_user(from->si_errno, &to->si_errno);
+ this code is fixed accordingly.
+ It should never copy any pad contained in the structure
+ to avoid security leaks, but must copy the generic
+ 3 ints plus the relevant union member. */
+ err = __put_user(from->si_signo, &to->si_signo);
+ err |= __put_user(from->si_errno, &to->si_errno);
err |= __put_user((short)from->si_code, &to->si_code);
if (from->si_code < 0) {
err |= __put_user(from->si_pid, &to->si_pid);
err |= __put_user(from->si_uid, &to->si_uid);
- err |= __put_user((u32)(u64)from->si_ptr, &to->si_ptr);
+ err |= __put_user(ptr_to_compat(from->si_ptr), &to->si_ptr);
} else {
/* First 32bits of unions are always present:
* si_pid === si_band === si_tid === si_addr(LS half) */
err |= __put_user(from->si_utime, &to->si_utime);
err |= __put_user(from->si_stime, &to->si_stime);
err |= __put_user(from->si_status, &to->si_status);
+ /* FALL THROUGH */
default:
case __SI_KILL >> 16:
err |= __put_user(from->si_uid, &to->si_uid);
break;
case __SI_TIMER >> 16:
err |= __put_user(from->si_overrun, &to->si_overrun);
- err |= __put_user((u32)(u64)from->si_ptr, &to->si_ptr);
+ err |= __put_user(ptr_to_compat(from->si_ptr),
+ &to->si_ptr);
break;
case __SI_RT >> 16: /* This is not generated by the kernel as of now. */
case __SI_MESGQ >> 16:
return err;
}
-int ia32_copy_siginfo_from_user(siginfo_t *to, siginfo_t32 __user *from)
+int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
{
int err;
- if (!access_ok (VERIFY_READ, from, sizeof(siginfo_t32)))
+ u32 ptr32;
+ if (!access_ok (VERIFY_READ, from, sizeof(compat_siginfo_t)))
return -EFAULT;
err = __get_user(to->si_signo, &from->si_signo);
err |= __get_user(to->si_pid, &from->si_pid);
err |= __get_user(to->si_uid, &from->si_uid);
- err |= __get_user((u32)(u64)to->si_ptr, &from->si_ptr);
+ err |= __get_user(ptr32, &from->si_ptr);
+ to->si_ptr = compat_ptr(ptr32);
return err;
}
asmlinkage long
-sys32_sigsuspend(int history0, int history1, old_sigset_t mask, struct pt_regs regs)
+sys32_sigsuspend(int history0, int history1, old_sigset_t mask,
+ struct pt_regs *regs)
{
sigset_t saveset;
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- regs.rax = -EINTR;
+ regs->rax = -EINTR;
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
- if (do_signal(®s, &saveset))
+ if (do_signal(regs, &saveset))
return -EINTR;
}
}
asmlinkage long
-sys32_sigaltstack(const stack_ia32_t *uss_ptr, stack_ia32_t *uoss_ptr,
- struct pt_regs regs)
+sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
+ stack_ia32_t __user *uoss_ptr,
+ struct pt_regs *regs)
{
stack_t uss,uoss;
int ret;
if (uss_ptr) {
u32 ptr;
memset(&uss,0,sizeof(stack_t));
- if (!access_ok(VERIFY_READ,uss_ptr,sizeof(stack_ia32_t)) ||
- __get_user(ptr, &uss_ptr->ss_sp) ||
- __get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
- __get_user(uss.ss_size, &uss_ptr->ss_size))
- return -EFAULT;
- uss.ss_sp = (void *)(u64)ptr;
+ if (!access_ok(VERIFY_READ,uss_ptr,sizeof(stack_ia32_t)) ||
+ __get_user(ptr, &uss_ptr->ss_sp) ||
+ __get_user(uss.ss_flags, &uss_ptr->ss_flags) ||
+ __get_user(uss.ss_size, &uss_ptr->ss_size))
+ return -EFAULT;
+ uss.ss_sp = compat_ptr(ptr);
}
seg = get_fs();
set_fs(KERNEL_DS);
- ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs.rsp);
+ ret = do_sigaltstack(uss_ptr ? &uss : NULL, &uoss, regs->rsp);
set_fs(seg);
if (ret >= 0 && uoss_ptr) {
if (!access_ok(VERIFY_WRITE,uoss_ptr,sizeof(stack_ia32_t)) ||
- __put_user((u32)(u64)uoss.ss_sp, &uoss_ptr->ss_sp) ||
+ __put_user(ptr_to_compat(uoss.ss_sp), &uoss_ptr->ss_sp) ||
__put_user(uoss.ss_flags, &uoss_ptr->ss_flags) ||
__put_user(uoss.ss_size, &uoss_ptr->ss_size))
ret = -EFAULT;
int sig;
u32 pinfo;
u32 puc;
- struct siginfo32 info;
+ compat_siginfo_t info;
struct ucontext_ia32 uc;
struct _fpstate_ia32 fpstate;
char retcode[8];
};
static int
-ia32_restore_sigcontext(struct pt_regs *regs, struct sigcontext_ia32 *sc, unsigned int *peax)
+ia32_restore_sigcontext(struct pt_regs *regs, struct sigcontext_ia32 __user *sc, unsigned int *peax)
{
unsigned int err = 0;
sc, sc->err, sc->eip, sc->cs, sc->eflags);
#endif
#define COPY(x) { \
- unsigned int reg; \
+ unsigned int reg; \
err |= __get_user(reg, &sc->e ##x); \
regs->r ## x = reg; \
}
#define RELOAD_SEG(seg,mask) \
- { unsigned int cur; \
- unsigned short pre; \
+ { unsigned int cur; \
+ unsigned short pre; \
err |= __get_user(pre, &sc->seg); \
asm volatile("movl %%" #seg ",%0" : "=r" (cur)); \
pre |= mask; \
{
u32 tmp;
- struct _fpstate_ia32 * buf;
+ struct _fpstate_ia32 __user * buf;
err |= __get_user(tmp, &sc->fpstate);
- buf = (struct _fpstate_ia32 *) (u64)tmp;
+ buf = compat_ptr(tmp);
if (buf) {
- if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
+ if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
goto badframe;
err |= restore_i387_ia32(current, buf, 0);
+ } else {
+ struct task_struct *me = current;
+ if (used_math()) {
+ clear_fpu(me);
+ clear_used_math();
+ }
}
}
return 1;
}
-asmlinkage long sys32_sigreturn(struct pt_regs regs)
+asmlinkage long sys32_sigreturn(struct pt_regs *regs)
{
- struct sigframe *frame = (struct sigframe *)(regs.rsp - 8);
+ struct sigframe __user *frame = (struct sigframe __user *)(regs->rsp-8);
sigset_t set;
unsigned int eax;
- 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)
|| (_COMPAT_NSIG_WORDS > 1
recalc_sigpending();
spin_unlock_irq(¤t->sighand->siglock);
- if (ia32_restore_sigcontext(®s, &frame->sc, &eax))
+ if (ia32_restore_sigcontext(regs, &frame->sc, &eax))
goto badframe;
return eax;
badframe:
- signal_fault(®s, frame, "32bit sigreturn");
+ signal_fault(regs, frame, "32bit sigreturn");
return 0;
}
-asmlinkage long sys32_rt_sigreturn(struct pt_regs regs)
+asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
{
- struct rt_sigframe *frame = (struct rt_sigframe *)(regs.rsp - 4);
+ struct rt_sigframe __user *frame;
sigset_t set;
- stack_t st;
unsigned int eax;
+ struct pt_regs tregs;
+
+ frame = (struct rt_sigframe __user *)(regs->rsp - 4);
- 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 (ia32_restore_sigcontext(®s, &frame->uc.uc_mcontext, &eax))
+ if (ia32_restore_sigcontext(regs, &frame->uc.uc_mcontext, &eax))
goto badframe;
- if (__copy_from_user(&st, &frame->uc.uc_stack, sizeof(st)))
+ tregs = *regs;
+ if (sys32_sigaltstack(&frame->uc.uc_stack, NULL, &tregs) == -EFAULT)
goto badframe;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- {
- mm_segment_t oldds = get_fs();
- set_fs(KERNEL_DS);
- do_sigaltstack(&st, NULL, regs.rsp);
- set_fs(oldds);
- }
return eax;
badframe:
- signal_fault(®s,frame,"32bit rt sigreturn");
+ signal_fault(regs,frame,"32bit rt sigreturn");
return 0;
}
*/
static int
-ia32_setup_sigcontext(struct sigcontext_ia32 *sc, struct _fpstate_ia32 *fpstate,
+ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc, struct _fpstate_ia32 __user *fpstate,
struct pt_regs *regs, unsigned int mask)
{
int tmp, err = 0;
+ u32 eflags;
tmp = 0;
__asm__("movl %%gs,%0" : "=r"(tmp): "0"(tmp));
- err |= __put_user(tmp, (unsigned int *)&sc->gs);
+ err |= __put_user(tmp, (unsigned int __user *)&sc->gs);
__asm__("movl %%fs,%0" : "=r"(tmp): "0"(tmp));
- err |= __put_user(tmp, (unsigned int *)&sc->fs);
+ err |= __put_user(tmp, (unsigned int __user *)&sc->fs);
__asm__("movl %%ds,%0" : "=r"(tmp): "0"(tmp));
- err |= __put_user(tmp, (unsigned int *)&sc->ds);
+ err |= __put_user(tmp, (unsigned int __user *)&sc->ds);
__asm__("movl %%es,%0" : "=r"(tmp): "0"(tmp));
- err |= __put_user(tmp, (unsigned int *)&sc->es);
+ err |= __put_user(tmp, (unsigned int __user *)&sc->es);
err |= __put_user((u32)regs->rdi, &sc->edi);
err |= __put_user((u32)regs->rsi, &sc->esi);
err |= __put_user(current->thread.trap_no, &sc->trapno);
err |= __put_user(current->thread.error_code, &sc->err);
err |= __put_user((u32)regs->rip, &sc->eip);
- err |= __put_user((u32)regs->eflags, &sc->eflags);
+ eflags = regs->eflags;
+ if (current->ptrace & PT_PTRACED)
+ eflags &= ~TF_MASK;
+ err |= __put_user((u32)eflags, &sc->eflags);
err |= __put_user((u32)regs->rsp, &sc->esp_at_signal);
tmp = save_i387_ia32(current, fpstate, regs, 0);
if (tmp < 0)
- err = -EFAULT;
+ err = -EFAULT;
else {
- current->used_math = 0;
+ clear_used_math();
stts();
- err |= __put_user((u32)(u64)(tmp ? fpstate : NULL), &sc->fpstate);
+ err |= __put_user(ptr_to_compat(tmp ? fpstate : NULL),
+ &sc->fpstate);
}
/* non-iBCS2 extensions.. */
/*
* Determine which stack to use..
*/
-static void *
+static void __user *
get_sigframe(struct k_sigaction *ka, struct pt_regs * regs, size_t frame_size)
{
unsigned long rsp;
rsp = (unsigned long) ka->sa.sa_restorer;
}
- return (void *)((rsp - frame_size) & -8UL);
+ return (void __user *)((rsp - frame_size) & -8UL);
}
void ia32_setup_frame(int sig, struct k_sigaction *ka,
compat_sigset_t *set, struct pt_regs * regs)
{
- struct sigframe *frame;
+ struct sigframe __user *frame;
int err = 0;
frame = get_sigframe(ka, regs, sizeof(*frame));
{
struct exec_domain *ed = current_thread_info()->exec_domain;
- err |= __put_user((ed
+ err |= __put_user((ed
&& ed->signal_invmap
&& sig < 32
? ed->signal_invmap[sig]
if (err)
goto give_sigsegv;
- err |= ia32_setup_sigcontext(&frame->sc, &frame->fpstate, regs, set->sig[0]);
+ err |= ia32_setup_sigcontext(&frame->sc, &frame->fpstate, regs,
+ set->sig[0]);
if (err)
goto give_sigsegv;
/* Return stub is in 32bit vsyscall page */
{
- void *restorer = VSYSCALL32_SIGRETURN;
+ void __user *restorer = VSYSCALL32_SIGRETURN;
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
- err |= __put_user(ptr_to_u32(restorer), &frame->pretcode);
+ err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
}
/* These are actually not used anymore, but left because some
gdb versions depend on them as a marker. */
regs->ss = __USER32_DS;
set_fs(USER_DS);
- regs->eflags &= ~TF_MASK;
+ if (regs->eflags & TF_MASK) {
+ if (current->ptrace & PT_PTRACED) {
+ ptrace_notify(SIGTRAP);
+ } else {
+ regs->eflags &= ~TF_MASK;
+ }
+ }
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
return;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- signal_fault(regs,frame,"32bit signal deliver");
+ force_sigsegv(sig, current);
}
void ia32_setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
compat_sigset_t *set, struct pt_regs * regs)
{
- struct rt_sigframe *frame;
+ struct rt_sigframe __user *frame;
int err = 0;
frame = get_sigframe(ka, regs, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
goto give_sigsegv;
-
{
struct exec_domain *ed = current_thread_info()->exec_domain;
- err |= __put_user((ed
+ err |= __put_user((ed
&& ed->signal_invmap
&& sig < 32
? ed->signal_invmap[sig]
: sig),
&frame->sig);
}
- err |= __put_user((u32)(u64)&frame->info, &frame->pinfo);
- err |= __put_user((u32)(u64)&frame->uc, &frame->puc);
- err |= ia32_copy_siginfo_to_user(&frame->info, info);
+ err |= __put_user(ptr_to_compat(&frame->info), &frame->pinfo);
+ err |= __put_user(ptr_to_compat(&frame->uc), &frame->puc);
+ err |= copy_siginfo_to_user32(&frame->info, info);
if (err)
goto give_sigsegv;
{
- void *restorer = VSYSCALL32_RTSIGRETURN;
+ void __user *restorer = VSYSCALL32_RTSIGRETURN;
if (ka->sa.sa_flags & SA_RESTORER)
restorer = ka->sa.sa_restorer;
- err |= __put_user(ptr_to_u32(restorer), &frame->pretcode);
+ err |= __put_user(ptr_to_compat(restorer), &frame->pretcode);
}
/* This is movl $,%eax ; int $0x80 */
regs->ss = __USER32_DS;
set_fs(USER_DS);
- regs->eflags &= ~TF_MASK;
+ if (regs->eflags & TF_MASK) {
+ if (current->ptrace & PT_PTRACED) {
+ ptrace_notify(SIGTRAP);
+ } else {
+ regs->eflags &= ~TF_MASK;
+ }
+ }
#if DEBUG_SIG
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
return;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- signal_fault(regs, frame, "32bit rt signal setup");
+ force_sigsegv(sig, current);
}
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