X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=arch%2Fmips%2Fkernel%2Fsignal32.c;h=572c610db1b11c4fe2b31da5150abaa431936be1;hb=cbdbe07f9d60b80c903bddf6533db839789925c7;hp=7c2241e4d779c679f008500fe1652d6f098cbeb0;hpb=9bbf28a36cae08817ac3a3f98fde329b02c89f4a;p=safe%2Fjmp%2Flinux-2.6 diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c index 7c2241e..572c610 100644 --- a/arch/mips/kernel/signal32.c +++ b/arch/mips/kernel/signal32.c @@ -4,119 +4,46 @@ * for more details. * * Copyright (C) 1991, 1992 Linus Torvalds - * Copyright (C) 1994 - 2000 Ralf Baechle + * Copyright (C) 1994 - 2000, 2006 Ralf Baechle * Copyright (C) 1999, 2000 Silicon Graphics, Inc. */ #include +#include #include #include #include -#include #include #include #include #include #include #include -#include #include #include +#include #include #include +#include #include #include #include -#include #include #include #include #include -#define SI_PAD_SIZE32 ((SI_MAX_SIZE/sizeof(int)) - 3) - -typedef struct compat_siginfo { - int si_signo; - int si_code; - int si_errno; - - union { - int _pad[SI_PAD_SIZE32]; - - /* kill() */ - struct { - compat_pid_t _pid; /* sender's pid */ - compat_uid_t _uid; /* sender's uid */ - } _kill; - - /* SIGCHLD */ - struct { - compat_pid_t _pid; /* which child */ - compat_uid_t _uid; /* sender's uid */ - int _status; /* exit code */ - compat_clock_t _utime; - compat_clock_t _stime; - } _sigchld; - - /* IRIX SIGCHLD */ - struct { - compat_pid_t _pid; /* which child */ - compat_clock_t _utime; - int _status; /* exit code */ - compat_clock_t _stime; - } _irix_sigchld; - - /* SIGILL, SIGFPE, SIGSEGV, SIGBUS */ - struct { - s32 _addr; /* faulting insn/memory ref. */ - } _sigfault; - - /* SIGPOLL, SIGXFSZ (To do ...) */ - struct { - int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ - int _fd; - } _sigpoll; - - /* POSIX.1b timers */ - struct { - timer_t _tid; /* timer id */ - int _overrun; /* overrun count */ - compat_sigval_t _sigval;/* same as below */ - int _sys_private; /* not to be passed to user */ - } _timer; - - /* POSIX.1b signals */ - struct { - compat_pid_t _pid; /* sender's pid */ - compat_uid_t _uid; /* sender's uid */ - compat_sigval_t _sigval; - } _rt; - - } _sifields; -} compat_siginfo_t; +#include "signal-common.h" /* * Including would give use the 64-bit syscall numbers ... */ #define __NR_O32_sigreturn 4119 #define __NR_O32_rt_sigreturn 4193 -#define __NR_O32_restart_syscall 4253 - -#define DEBUG_SIG 0 - -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -extern int do_signal32(sigset_t *oldset, struct pt_regs *regs); +#define __NR_O32_restart_syscall 4253 /* 32-bit compatibility types */ -#define _NSIG_BPW32 32 -#define _NSIG_WORDS32 (_NSIG / _NSIG_BPW32) - -typedef struct { - unsigned int sig[_NSIG_WORDS32]; -} sigset_t32; - typedef unsigned int __sighandler32_t; typedef void (*vfptr_t)(void); @@ -138,9 +65,188 @@ struct ucontext32 { s32 uc_link; stack32_t uc_stack; struct sigcontext32 uc_mcontext; - sigset_t32 uc_sigmask; /* mask last for extensibility */ + compat_sigset_t uc_sigmask; /* mask last for extensibility */ +}; + +/* + * Horribly complicated - with the bloody RM9000 workarounds enabled + * the signal trampolines is moving to the end of the structure so we can + * increase the alignment without breaking software compatibility. + */ +#if ICACHE_REFILLS_WORKAROUND_WAR == 0 + +struct sigframe32 { + u32 sf_ass[4]; /* argument save space for o32 */ + u32 sf_code[2]; /* signal trampoline */ + struct sigcontext32 sf_sc; + compat_sigset_t sf_mask; +}; + +struct rt_sigframe32 { + u32 rs_ass[4]; /* argument save space for o32 */ + u32 rs_code[2]; /* signal trampoline */ + compat_siginfo_t rs_info; + struct ucontext32 rs_uc; +}; + +#else /* ICACHE_REFILLS_WORKAROUND_WAR */ + +struct sigframe32 { + u32 sf_ass[4]; /* argument save space for o32 */ + u32 sf_pad[2]; + struct sigcontext32 sf_sc; /* hw context */ + compat_sigset_t sf_mask; + u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */ +}; + +struct rt_sigframe32 { + u32 rs_ass[4]; /* argument save space for o32 */ + u32 rs_pad[2]; + compat_siginfo_t rs_info; + struct ucontext32 rs_uc; + u32 rs_code[8] __attribute__((aligned(32))); /* signal trampoline */ }; +#endif /* !ICACHE_REFILLS_WORKAROUND_WAR */ + +/* + * sigcontext handlers + */ +static int protected_save_fp_context32(struct sigcontext32 __user *sc) +{ + int err; + while (1) { + lock_fpu_owner(); + own_fpu_inatomic(1); + err = save_fp_context32(sc); /* this might fail */ + unlock_fpu_owner(); + if (likely(!err)) + break; + /* touch the sigcontext and try again */ + err = __put_user(0, &sc->sc_fpregs[0]) | + __put_user(0, &sc->sc_fpregs[31]) | + __put_user(0, &sc->sc_fpc_csr); + if (err) + break; /* really bad sigcontext */ + } + return err; +} + +static int protected_restore_fp_context32(struct sigcontext32 __user *sc) +{ + int err, tmp; + while (1) { + lock_fpu_owner(); + own_fpu_inatomic(0); + err = restore_fp_context32(sc); /* this might fail */ + unlock_fpu_owner(); + if (likely(!err)) + break; + /* touch the sigcontext and try again */ + err = __get_user(tmp, &sc->sc_fpregs[0]) | + __get_user(tmp, &sc->sc_fpregs[31]) | + __get_user(tmp, &sc->sc_fpc_csr); + if (err) + break; /* really bad sigcontext */ + } + return err; +} + +static int setup_sigcontext32(struct pt_regs *regs, + struct sigcontext32 __user *sc) +{ + int err = 0; + int i; + u32 used_math; + + err |= __put_user(regs->cp0_epc, &sc->sc_pc); + + err |= __put_user(0, &sc->sc_regs[0]); + for (i = 1; i < 32; i++) + err |= __put_user(regs->regs[i], &sc->sc_regs[i]); + + err |= __put_user(regs->hi, &sc->sc_mdhi); + err |= __put_user(regs->lo, &sc->sc_mdlo); + if (cpu_has_dsp) { + err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); + err |= __put_user(mfhi1(), &sc->sc_hi1); + err |= __put_user(mflo1(), &sc->sc_lo1); + err |= __put_user(mfhi2(), &sc->sc_hi2); + err |= __put_user(mflo2(), &sc->sc_lo2); + err |= __put_user(mfhi3(), &sc->sc_hi3); + err |= __put_user(mflo3(), &sc->sc_lo3); + } + + used_math = !!used_math(); + err |= __put_user(used_math, &sc->sc_used_math); + + if (used_math) { + /* + * Save FPU state to signal context. Signal handler + * will "inherit" current FPU state. + */ + err |= protected_save_fp_context32(sc); + } + return err; +} + +static int +check_and_restore_fp_context32(struct sigcontext32 __user *sc) +{ + int err, sig; + + err = sig = fpcsr_pending(&sc->sc_fpc_csr); + if (err > 0) + err = 0; + err |= protected_restore_fp_context32(sc); + return err ?: sig; +} + +static int restore_sigcontext32(struct pt_regs *regs, + struct sigcontext32 __user *sc) +{ + u32 used_math; + int err = 0; + s32 treg; + int i; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + err |= __get_user(regs->cp0_epc, &sc->sc_pc); + err |= __get_user(regs->hi, &sc->sc_mdhi); + err |= __get_user(regs->lo, &sc->sc_mdlo); + if (cpu_has_dsp) { + err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); + err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); + err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); + err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); + err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); + err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); + err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); + } + + for (i = 1; i < 32; i++) + err |= __get_user(regs->regs[i], &sc->sc_regs[i]); + + err |= __get_user(used_math, &sc->sc_used_math); + conditional_used_math(used_math); + + if (used_math) { + /* restore fpu context if we have used it before */ + if (!err) + err = check_and_restore_fp_context32(sc); + } else { + /* signal handler may have used FPU. Give it up. */ + lose_fpu(0); + } + + return err; +} + +/* + * + */ extern void __put_sigset_unknown_nsig(void); extern void __get_sigset_unknown_nsig(void); @@ -155,17 +261,17 @@ static inline int put_sigset(const sigset_t *kbuf, compat_sigset_t __user *ubuf) default: __put_sigset_unknown_nsig(); case 2: - err |= __put_user (kbuf->sig[1] >> 32, &ubuf->sig[3]); - err |= __put_user (kbuf->sig[1] & 0xffffffff, &ubuf->sig[2]); + err |= __put_user(kbuf->sig[1] >> 32, &ubuf->sig[3]); + err |= __put_user(kbuf->sig[1] & 0xffffffff, &ubuf->sig[2]); case 1: - err |= __put_user (kbuf->sig[0] >> 32, &ubuf->sig[1]); - err |= __put_user (kbuf->sig[0] & 0xffffffff, &ubuf->sig[0]); + err |= __put_user(kbuf->sig[0] >> 32, &ubuf->sig[1]); + err |= __put_user(kbuf->sig[0] & 0xffffffff, &ubuf->sig[0]); } return err; } -static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t *ubuf) +static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t __user *ubuf) { int err = 0; unsigned long sig[4]; @@ -177,12 +283,12 @@ static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t *ubuf) default: __get_sigset_unknown_nsig(); case 2: - err |= __get_user (sig[3], &ubuf->sig[3]); - err |= __get_user (sig[2], &ubuf->sig[2]); + err |= __get_user(sig[3], &ubuf->sig[3]); + err |= __get_user(sig[2], &ubuf->sig[2]); kbuf->sig[1] = sig[2] | (sig[3] << 32); case 1: - err |= __get_user (sig[1], &ubuf->sig[1]); - err |= __get_user (sig[0], &ubuf->sig[0]); + err |= __get_user(sig[1], &ubuf->sig[1]); + err |= __get_user(sig[0], &ubuf->sig[0]); kbuf->sig[0] = sig[0] | (sig[1] << 32); } @@ -193,70 +299,58 @@ static inline int get_sigset(sigset_t *kbuf, const compat_sigset_t *ubuf) * Atomically swap in the new signal mask, and wait for a signal. */ -save_static_function(sys32_sigsuspend); -__attribute_used__ noinline static int -_sys32_sigsuspend(nabi_no_regargs struct pt_regs regs) +asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs) { - compat_sigset_t *uset; - sigset_t newset, saveset; + compat_sigset_t __user *uset; + sigset_t newset; - uset = (compat_sigset_t *) regs.regs[4]; + uset = (compat_sigset_t __user *) regs.regs[4]; if (get_sigset(&newset, uset)) return -EFAULT; sigdelsetmask(&newset, ~_BLOCKABLE); spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; + current->saved_sigmask = current->blocked; current->blocked = newset; recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - regs.regs[2] = EINTR; - regs.regs[7] = 1; - while (1) { - current->state = TASK_INTERRUPTIBLE; - schedule(); - if (do_signal32(&saveset, ®s)) - return -EINTR; - } + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_thread_flag(TIF_RESTORE_SIGMASK); + return -ERESTARTNOHAND; } -save_static_function(sys32_rt_sigsuspend); -__attribute_used__ noinline static int -_sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) +asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs) { - compat_sigset_t *uset; - sigset_t newset, saveset; - size_t sigsetsize; + compat_sigset_t __user *uset; + sigset_t newset; + size_t sigsetsize; /* XXX Don't preclude handling different sized sigset_t's. */ sigsetsize = regs.regs[5]; if (sigsetsize != sizeof(compat_sigset_t)) return -EINVAL; - uset = (compat_sigset_t *) regs.regs[4]; + uset = (compat_sigset_t __user *) regs.regs[4]; if (get_sigset(&newset, uset)) return -EFAULT; sigdelsetmask(&newset, ~_BLOCKABLE); spin_lock_irq(¤t->sighand->siglock); - saveset = current->blocked; + current->saved_sigmask = current->blocked; current->blocked = newset; - recalc_sigpending(); + recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - regs.regs[2] = EINTR; - regs.regs[7] = 1; - while (1) { - current->state = TASK_INTERRUPTIBLE; - schedule(); - if (do_signal32(&saveset, ®s)) - return -EINTR; - } + current->state = TASK_INTERRUPTIBLE; + schedule(); + set_thread_flag(TIF_RESTORE_SIGMASK); + return -ERESTARTNOHAND; } -asmlinkage int sys32_sigaction(int sig, const struct sigaction32 *act, - struct sigaction32 *oact) +asmlinkage int sys32_sigaction(int sig, const struct sigaction32 __user *act, + struct sigaction32 __user *oact) { struct k_sigaction new_ka, old_ka; int ret; @@ -282,15 +376,15 @@ asmlinkage int sys32_sigaction(int sig, const struct sigaction32 *act, if (!ret && oact) { if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact))) - return -EFAULT; + return -EFAULT; err |= __put_user(old_ka.sa.sa_flags, &oact->sa_flags); err |= __put_user((u32)(u64)old_ka.sa.sa_handler, &oact->sa_handler); err |= __put_user(old_ka.sa.sa_mask.sig[0], oact->sa_mask.sig); - err |= __put_user(0, &oact->sa_mask.sig[1]); - err |= __put_user(0, &oact->sa_mask.sig[2]); - err |= __put_user(0, &oact->sa_mask.sig[3]); - if (err) + err |= __put_user(0, &oact->sa_mask.sig[1]); + err |= __put_user(0, &oact->sa_mask.sig[2]); + err |= __put_user(0, &oact->sa_mask.sig[3]); + if (err) return -EFAULT; } @@ -311,22 +405,22 @@ asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs) if (!access_ok(VERIFY_READ, uss, sizeof(*uss))) return -EFAULT; err |= __get_user(sp, &uss->ss_sp); - kss.ss_sp = (void *) (long) sp; + kss.ss_sp = (void __user *) (long) sp; err |= __get_user(kss.ss_size, &uss->ss_size); err |= __get_user(kss.ss_flags, &uss->ss_flags); if (err) return -EFAULT; } - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); ret = do_sigaltstack(uss ? (stack_t __user *)&kss : NULL, uoss ? (stack_t __user *)&koss : NULL, usp); - set_fs (old_fs); + set_fs(old_fs); if (!ret && uoss) { if (!access_ok(VERIFY_WRITE, uoss, sizeof(*uoss))) return -EFAULT; - sp = (int) (long) koss.ss_sp; + sp = (int) (unsigned long) koss.ss_sp; err |= __put_user(sp, &uoss->ss_sp); err |= __put_user(koss.ss_size, &uoss->ss_size); err |= __put_user(koss.ss_flags, &uoss->ss_flags); @@ -336,91 +430,6 @@ asmlinkage int sys32_sigaltstack(nabi_no_regargs struct pt_regs regs) return ret; } -static int restore_sigcontext32(struct pt_regs *regs, struct sigcontext32 __user *sc) -{ - u32 used_math; - int err = 0; - s32 treg; - - /* Always make any pending restarted system calls return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - err |= __get_user(regs->cp0_epc, &sc->sc_pc); - err |= __get_user(regs->hi, &sc->sc_mdhi); - err |= __get_user(regs->lo, &sc->sc_mdlo); - if (cpu_has_dsp) { - err |= __get_user(treg, &sc->sc_hi1); mthi1(treg); - err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg); - err |= __get_user(treg, &sc->sc_hi2); mthi2(treg); - err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg); - err |= __get_user(treg, &sc->sc_hi3); mthi3(treg); - err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg); - err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK); - } - -#define restore_gp_reg(i) do { \ - err |= __get_user(regs->regs[i], &sc->sc_regs[i]); \ -} while(0) - restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3); - restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6); - restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9); - restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12); - restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15); - restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18); - restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21); - restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24); - restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27); - restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30); - restore_gp_reg(31); -#undef restore_gp_reg - - err |= __get_user(used_math, &sc->sc_used_math); - conditional_used_math(used_math); - - preempt_disable(); - - if (used_math()) { - /* restore fpu context if we have used it before */ - own_fpu(); - err |= restore_fp_context32(sc); - } else { - /* signal handler may have used FPU. Give it up. */ - lose_fpu(); - } - - preempt_enable(); - - return err; -} - -struct sigframe { - u32 sf_ass[4]; /* argument save space for o32 */ -#if ICACHE_REFILLS_WORKAROUND_WAR - u32 sf_pad[2]; -#else - u32 sf_code[2]; /* signal trampoline */ -#endif - struct sigcontext32 sf_sc; - sigset_t sf_mask; -#if ICACHE_REFILLS_WORKAROUND_WAR - u32 sf_code[8] ____cacheline_aligned; /* signal trampoline */ -#endif -}; - -struct rt_sigframe32 { - u32 rs_ass[4]; /* argument save space for o32 */ -#if ICACHE_REFILLS_WORKAROUND_WAR - u32 rs_pad[2]; -#else - u32 rs_code[2]; /* signal trampoline */ -#endif - compat_siginfo_t rs_info; - struct ucontext32 rs_uc; -#if ICACHE_REFILLS_WORKAROUND_WAR - u32 rs_code[8] __attribute__((aligned(32))); /* signal trampoline */ -#endif -}; - int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) { int err; @@ -456,7 +465,7 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) err |= __put_user(from->si_uid, &to->si_uid); break; case __SI_FAULT >> 16: - err |= __put_user((long)from->si_addr, &to->si_addr); + err |= __put_user((unsigned long)from->si_addr, &to->si_addr); break; case __SI_POLL >> 16: err |= __put_user(from->si_band, &to->si_band); @@ -473,17 +482,16 @@ int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) return err; } -save_static_function(sys32_sigreturn); -__attribute_used__ noinline static void -_sys32_sigreturn(nabi_no_regargs struct pt_regs regs) +asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs) { - struct sigframe __user *frame; + struct sigframe32 __user *frame; sigset_t blocked; + int sig; - frame = (struct sigframe __user *) regs.regs[29]; + frame = (struct sigframe32 __user *) regs.regs[29]; if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) goto badframe; - if (__copy_from_user(&blocked, &frame->sf_mask, sizeof(blocked))) + if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask)) goto badframe; sigdelsetmask(&blocked, ~_BLOCKABLE); @@ -492,8 +500,11 @@ _sys32_sigreturn(nabi_no_regargs struct pt_regs regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if (restore_sigcontext32(®s, &frame->sf_sc)) + sig = restore_sigcontext32(®s, &frame->sf_sc); + if (sig < 0) goto badframe; + else if (sig) + force_sig(sig, current); /* * Don't let your children do this ... @@ -509,20 +520,19 @@ badframe: force_sig(SIGSEGV, current); } -save_static_function(sys32_rt_sigreturn); -__attribute_used__ noinline static void -_sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) +asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) { struct rt_sigframe32 __user *frame; mm_segment_t old_fs; sigset_t set; stack_t st; s32 sp; + int sig; frame = (struct rt_sigframe32 __user *) regs.regs[29]; if (!access_ok(VERIFY_READ, frame, sizeof(*frame))) goto badframe; - if (__copy_from_user(&set, &frame->rs_uc.uc_sigmask, sizeof(set))) + if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask)) goto badframe; sigdelsetmask(&set, ~_BLOCKABLE); @@ -531,13 +541,16 @@ _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) recalc_sigpending(); spin_unlock_irq(¤t->sighand->siglock); - if (restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext)) + sig = restore_sigcontext32(®s, &frame->rs_uc.uc_mcontext); + if (sig < 0) goto badframe; + else if (sig) + force_sig(sig, current); /* The ucontext contains a stack32_t, so we must convert! */ if (__get_user(sp, &frame->rs_uc.uc_stack.ss_sp)) goto badframe; - st.ss_size = (long) sp; + st.ss_sp = (void __user *)(long) sp; if (__get_user(st.ss_size, &frame->rs_uc.uc_stack.ss_size)) goto badframe; if (__get_user(st.ss_flags, &frame->rs_uc.uc_stack.ss_flags)) @@ -546,9 +559,9 @@ _sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs) /* It is more difficult to avoid calling this function than to call it and ignore errors. */ old_fs = get_fs(); - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); do_sigaltstack((stack_t __user *)&st, NULL, regs.regs[29]); - set_fs (old_fs); + set_fs(old_fs); /* * Don't let your children do this ... @@ -564,111 +577,21 @@ badframe: force_sig(SIGSEGV, current); } -static inline int setup_sigcontext32(struct pt_regs *regs, - struct sigcontext32 __user *sc) -{ - int err = 0; - - err |= __put_user(regs->cp0_epc, &sc->sc_pc); - err |= __put_user(regs->cp0_status, &sc->sc_status); - -#define save_gp_reg(i) { \ - err |= __put_user(regs->regs[i], &sc->sc_regs[i]); \ -} while(0) - __put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2); - save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6); - save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10); - save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14); - save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18); - save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22); - save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26); - save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30); - save_gp_reg(31); -#undef save_gp_reg - - err |= __put_user(regs->hi, &sc->sc_mdhi); - err |= __put_user(regs->lo, &sc->sc_mdlo); - if (cpu_has_dsp) { - err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp); - err |= __put_user(mfhi1(), &sc->sc_hi1); - err |= __put_user(mflo1(), &sc->sc_lo1); - err |= __put_user(mfhi2(), &sc->sc_hi2); - err |= __put_user(mflo2(), &sc->sc_lo2); - err |= __put_user(mfhi3(), &sc->sc_hi3); - err |= __put_user(mflo3(), &sc->sc_lo3); - } - - err |= __put_user(!!used_math(), &sc->sc_used_math); - - if (!used_math()) - goto out; - - /* - * Save FPU state to signal context. Signal handler will "inherit" - * current FPU state. - */ - preempt_disable(); - - if (!is_fpu_owner()) { - own_fpu(); - restore_fp(current); - } - err |= save_fp_context32(sc); - - preempt_enable(); - -out: - return err; -} - -/* - * Determine which stack to use.. - */ -static inline void __user *get_sigframe(struct k_sigaction *ka, - struct pt_regs *regs, - size_t frame_size) -{ - unsigned long sp; - - /* Default to using normal stack */ - sp = regs->regs[29]; - - /* - * FPU emulator may have it's own trampoline active just - * above the user stack, 16-bytes before the next lowest - * 16 byte boundary. Try to avoid trashing it. - */ - sp -= 32; - - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0)) - sp = current->sas_ss_sp + current->sas_ss_size; - - return (void __user *)((sp - frame_size) & ALMASK); -} - -int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs, +static int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs, int signr, sigset_t *set) { - struct sigframe __user *frame; + struct sigframe32 __user *frame; int err = 0; frame = get_sigframe(ka, regs, sizeof(*frame)); if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) goto give_sigsegv; - /* - * Set up the return code ... - * - * li v0, __NR_O32_sigreturn - * syscall - */ - err |= __put_user(0x24020000 + __NR_O32_sigreturn, frame->sf_code + 0); - err |= __put_user(0x0000000c , frame->sf_code + 1); - flush_cache_sigtramp((unsigned long) frame->sf_code); + err |= install_sigtramp(frame->sf_code, __NR_O32_sigreturn); err |= setup_sigcontext32(regs, &frame->sf_sc); - err |= __copy_to_user(&frame->sf_mask, set, sizeof(*set)); + err |= __copy_conv_sigset_to_user(&frame->sf_mask, set); + if (err) goto give_sigsegv; @@ -689,19 +612,18 @@ int setup_frame_32(struct k_sigaction * ka, struct pt_regs *regs, regs->regs[31] = (unsigned long) frame->sf_code; regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; -#if DEBUG_SIG - printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n", + DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", current->comm, current->pid, - frame, regs->cp0_epc, frame->sf_code); -#endif - return 1; + frame, regs->cp0_epc, regs->regs[31]); + + return 0; give_sigsegv: force_sigsegv(signr, current); - return 0; + return -EFAULT; } -int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, +static int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, int signr, sigset_t *set, siginfo_t *info) { struct rt_sigframe32 __user *frame; @@ -712,17 +634,7 @@ int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame))) goto give_sigsegv; - /* Set up to return from userspace. If provided, use a stub already - in userspace. */ - /* - * Set up the return code ... - * - * li v0, __NR_O32_rt_sigreturn - * syscall - */ - err |= __put_user(0x24020000 + __NR_O32_rt_sigreturn, frame->rs_code + 0); - err |= __put_user(0x0000000c , frame->rs_code + 1); - flush_cache_sigtramp((unsigned long) frame->rs_code); + err |= install_sigtramp(frame->rs_code, __NR_O32_rt_sigreturn); /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */ err |= copy_siginfo_to_user32(&frame->rs_info, info); @@ -738,7 +650,7 @@ int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, err |= __put_user(current->sas_ss_size, &frame->rs_uc.uc_stack.ss_size); err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext); - err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set)); + err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set); if (err) goto give_sigsegv; @@ -760,103 +672,27 @@ int setup_rt_frame_32(struct k_sigaction * ka, struct pt_regs *regs, regs->regs[31] = (unsigned long) frame->rs_code; regs->cp0_epc = regs->regs[25] = (unsigned long) ka->sa.sa_handler; -#if DEBUG_SIG - printk("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%p\n", + DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n", current->comm, current->pid, - frame, regs->cp0_epc, frame->rs_code); -#endif - return 1; + frame, regs->cp0_epc, regs->regs[31]); -give_sigsegv: - force_sigsegv(signr, current); return 0; -} - -static inline int handle_signal(unsigned long sig, siginfo_t *info, - struct k_sigaction *ka, sigset_t *oldset, struct pt_regs * regs) -{ - int ret; - switch (regs->regs[0]) { - case ERESTART_RESTARTBLOCK: - case ERESTARTNOHAND: - regs->regs[2] = EINTR; - break; - case ERESTARTSYS: - if(!(ka->sa.sa_flags & SA_RESTART)) { - regs->regs[2] = EINTR; - break; - } - /* fallthrough */ - case ERESTARTNOINTR: /* Userland will reload $v0. */ - regs->regs[7] = regs->regs[26]; - regs->cp0_epc -= 8; - } - - regs->regs[0] = 0; /* Don't deal with this again. */ - - if (ka->sa.sa_flags & SA_SIGINFO) - ret = current->thread.abi->setup_rt_frame(ka, regs, sig, oldset, info); - else - ret = current->thread.abi->setup_frame(ka, regs, sig, oldset); - - 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); - - return ret; +give_sigsegv: + force_sigsegv(signr, current); + return -EFAULT; } -int do_signal32(sigset_t *oldset, struct pt_regs *regs) -{ - struct k_sigaction ka; - siginfo_t info; - int signr; - - /* - * We want the common case to go fast, which is why we may in certain - * cases get here from kernel mode. Just return without doing anything - * if so. - */ - if (!user_mode(regs)) - return 1; - - if (try_to_freeze()) - goto no_signal; - - if (!oldset) - oldset = ¤t->blocked; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - if (signr > 0) - return handle_signal(signr, &info, &ka, oldset, regs); - -no_signal: - /* - * Who's code doesn't conform to the restartable syscall convention - * dies here!!! The li instruction, a single machine instruction, - * must directly be followed by the syscall instruction. - */ - if (regs->regs[0]) { - if (regs->regs[2] == ERESTARTNOHAND || - regs->regs[2] == ERESTARTSYS || - regs->regs[2] == ERESTARTNOINTR) { - regs->regs[7] = regs->regs[26]; - regs->cp0_epc -= 8; - } - if (regs->regs[2] == ERESTART_RESTARTBLOCK) { - regs->regs[2] = __NR_O32_restart_syscall; - regs->regs[7] = regs->regs[26]; - regs->cp0_epc -= 4; - } - } - return 0; -} +/* + * o32 compatibility on 64-bit kernels, without DSP ASE + */ +struct mips_abi mips_abi_32 = { + .setup_frame = setup_frame_32, + .setup_rt_frame = setup_rt_frame_32, + .restart = __NR_O32_restart_syscall +}; -asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 *act, +asmlinkage int sys32_rt_sigaction(int sig, const struct sigaction32 __user *act, struct sigaction32 __user *oact, unsigned int sigsetsize) { @@ -900,7 +736,7 @@ out: return ret; } -asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set, +asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t __user *set, compat_sigset_t __user *oset, unsigned int sigsetsize) { sigset_t old_set, new_set; @@ -910,11 +746,11 @@ asmlinkage int sys32_rt_sigprocmask(int how, compat_sigset_t *set, if (set && get_sigset(&new_set, set)) return -EFAULT; - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); ret = sys_rt_sigprocmask(how, set ? (sigset_t __user *)&new_set : NULL, oset ? (sigset_t __user *)&old_set : NULL, sigsetsize); - set_fs (old_fs); + set_fs(old_fs); if (!ret && oset && put_sigset(&old_set, oset)) return -EFAULT; @@ -929,9 +765,9 @@ asmlinkage int sys32_rt_sigpending(compat_sigset_t __user *uset, sigset_t set; mm_segment_t old_fs = get_fs(); - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); ret = sys_rt_sigpending((sigset_t __user *)&set, sigsetsize); - set_fs (old_fs); + set_fs(old_fs); if (!ret && put_sigset(&set, uset)) return -EFAULT; @@ -945,12 +781,12 @@ asmlinkage int sys32_rt_sigqueueinfo(int pid, int sig, compat_siginfo_t __user * int ret; mm_segment_t old_fs = get_fs(); - if (copy_from_user (&info, uinfo, 3*sizeof(int)) || - copy_from_user (info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE)) + if (copy_from_user(&info, uinfo, 3*sizeof(int)) || + copy_from_user(info._sifields._pad, uinfo->_sifields._pad, SI_PAD_SIZE)) return -EFAULT; - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); ret = sys_rt_sigqueueinfo(pid, sig, (siginfo_t __user *)&info); - set_fs (old_fs); + set_fs(old_fs); return ret; } @@ -965,10 +801,10 @@ sys32_waitid(int which, compat_pid_t pid, mm_segment_t old_fs = get_fs(); info.si_signo = 0; - set_fs (KERNEL_DS); + set_fs(KERNEL_DS); ret = sys_waitid(which, pid, (siginfo_t __user *) &info, options, uru ? (struct rusage __user *) &ru : NULL); - set_fs (old_fs); + set_fs(old_fs); if (ret < 0 || info.si_signo == 0) return ret;