diff options
Diffstat (limited to 'arch/sparc64/kernel/signal32.c')
| -rw-r--r-- | arch/sparc64/kernel/signal32.c | 1469 |
1 files changed, 1469 insertions, 0 deletions
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c new file mode 100644 index 000000000000..859255cf6762 --- /dev/null +++ b/arch/sparc64/kernel/signal32.c @@ -0,0 +1,1469 @@ +/* $Id: signal32.c,v 1.74 2002/02/09 19:49:30 davem Exp $ + * arch/sparc64/kernel/signal32.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) + * Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx) + * Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be) + * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) + */ + +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/signal.h> +#include <linux/errno.h> +#include <linux/wait.h> +#include <linux/ptrace.h> +#include <linux/unistd.h> +#include <linux/mm.h> +#include <linux/tty.h> +#include <linux/smp_lock.h> +#include <linux/binfmts.h> +#include <linux/compat.h> +#include <linux/bitops.h> + +#include <asm/uaccess.h> +#include <asm/ptrace.h> +#include <asm/svr4.h> +#include <asm/pgtable.h> +#include <asm/psrcompat.h> +#include <asm/fpumacro.h> +#include <asm/visasm.h> + +#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) + +int do_signal32(sigset_t *oldset, struct pt_regs *regs, + unsigned long orig_o0, int ret_from_syscall); + +/* Signal frames: the original one (compatible with SunOS): + * + * Set up a signal frame... Make the stack look the way SunOS + * expects it to look which is basically: + * + * ---------------------------------- <-- %sp at signal time + * Struct sigcontext + * Signal address + * Ptr to sigcontext area above + * Signal code + * The signal number itself + * One register window + * ---------------------------------- <-- New %sp + */ +struct signal_sframe32 { + struct reg_window32 sig_window; + int sig_num; + int sig_code; + /* struct sigcontext32 * */ u32 sig_scptr; + int sig_address; + struct sigcontext32 sig_context; + unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; +}; + +/* This magic should be in g_upper[0] for all upper parts + * to be valid. + */ +#define SIGINFO_EXTRA_V8PLUS_MAGIC 0x130e269 +typedef struct { + unsigned int g_upper[8]; + unsigned int o_upper[8]; + unsigned int asi; +} siginfo_extra_v8plus_t; + +/* + * And the new one, intended to be used for Linux applications only + * (we have enough in there to work with clone). + * All the interesting bits are in the info field. + */ +struct new_signal_frame32 { + struct sparc_stackf32 ss; + __siginfo32_t info; + /* __siginfo_fpu32_t * */ u32 fpu_save; + unsigned int insns[2]; + unsigned int extramask[_COMPAT_NSIG_WORDS - 1]; + unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ + /* Only valid if (info.si_regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ + siginfo_extra_v8plus_t v8plus; + __siginfo_fpu_t fpu_state; +}; + +typedef struct compat_siginfo{ + int si_signo; + int si_errno; + int si_code; + + union { + int _pad[SI_PAD_SIZE32]; + + /* kill() */ + struct { + compat_pid_t _pid; /* sender's pid */ + unsigned int _uid; /* sender's uid */ + } _kill; + + /* 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 */ + unsigned int _uid; /* sender's uid */ + compat_sigval_t _sigval; + } _rt; + + /* SIGCHLD */ + struct { + compat_pid_t _pid; /* which child */ + unsigned int _uid; /* sender's uid */ + int _status; /* exit code */ + compat_clock_t _utime; + compat_clock_t _stime; + } _sigchld; + + /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */ + struct { + u32 _addr; /* faulting insn/memory ref. */ + int _trapno; + } _sigfault; + + /* SIGPOLL */ + struct { + int _band; /* POLL_IN, POLL_OUT, POLL_MSG */ + int _fd; + } _sigpoll; + } _sifields; +}compat_siginfo_t; + +struct rt_signal_frame32 { + struct sparc_stackf32 ss; + compat_siginfo_t info; + struct pt_regs32 regs; + compat_sigset_t mask; + /* __siginfo_fpu32_t * */ u32 fpu_save; + unsigned int insns[2]; + stack_t32 stack; + unsigned int extra_size; /* Should be sizeof(siginfo_extra_v8plus_t) */ + /* Only valid if (regs.psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS */ + siginfo_extra_v8plus_t v8plus; + __siginfo_fpu_t fpu_state; +}; + +/* Align macros */ +#define SF_ALIGNEDSZ (((sizeof(struct signal_sframe32) + 7) & (~7))) +#define NF_ALIGNEDSZ (((sizeof(struct new_signal_frame32) + 7) & (~7))) +#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7))) + +int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from) +{ + int err; + + if (!access_ok(VERIFY_WRITE, to, sizeof(compat_siginfo_t))) + return -EFAULT; + + /* If you change siginfo_t structure, please be sure + 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. + This routine must convert siginfo from 64bit to 32bit as well + at the same time. */ + 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 |= __copy_to_user(&to->_sifields._pad, &from->_sifields._pad, SI_PAD_SIZE); + else { + switch (from->si_code >> 16) { + case __SI_TIMER >> 16: + err |= __put_user(from->si_tid, &to->si_tid); + err |= __put_user(from->si_overrun, &to->si_overrun); + err |= __put_user(from->si_int, &to->si_int); + break; + case __SI_CHLD >> 16: + 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); + default: + err |= __put_user(from->si_pid, &to->si_pid); + err |= __put_user(from->si_uid, &to->si_uid); + break; + case __SI_FAULT >> 16: + case __SI_POLL >> 16: + err |= __put_user(from->si_trapno, &to->si_trapno); + err |= __put_user((unsigned long)from->si_addr, &to->si_addr); + break; + case __SI_RT >> 16: /* This is not generated by the kernel as of now. */ + case __SI_MESGQ >> 16: + err |= __put_user(from->si_pid, &to->si_pid); + err |= __put_user(from->si_uid, &to->si_uid); + err |= __put_user(from->si_int, &to->si_int); + break; + } + } + return err; +} + +/* CAUTION: This is just a very minimalist implementation for the + * sake of compat_sys_rt_sigqueueinfo() + */ +int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from) +{ + if (!access_ok(VERIFY_WRITE, from, sizeof(compat_siginfo_t))) + return -EFAULT; + + if (copy_from_user(to, from, 3*sizeof(int)) || + copy_from_user(to->_sifields._pad, from->_sifields._pad, + SI_PAD_SIZE)) + return -EFAULT; + + return 0; +} + +/* + * atomically swap in the new signal mask, and wait for a signal. + * This is really tricky on the Sparc, watch out... + */ +asmlinkage void _sigpause32_common(compat_old_sigset_t set, struct pt_regs *regs) +{ + sigset_t saveset; + + set &= _BLOCKABLE; + spin_lock_irq(¤t->sighand->siglock); + saveset = current->blocked; + siginitset(¤t->blocked, set); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + regs->tpc = regs->tnpc; + regs->tnpc += 4; + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + + /* Condition codes and return value where set here for sigpause, + * and so got used by setup_frame, which again causes sigreturn() + * to return -EINTR. + */ + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + /* + * Return -EINTR and set condition code here, + * so the interrupted system call actually returns + * these. + */ + regs->tstate |= TSTATE_ICARRY; + regs->u_regs[UREG_I0] = EINTR; + if (do_signal32(&saveset, regs, 0, 0)) + return; + } +} + +asmlinkage void do_rt_sigsuspend32(u32 uset, size_t sigsetsize, struct pt_regs *regs) +{ + sigset_t oldset, set; + compat_sigset_t set32; + + /* XXX: Don't preclude handling different sized sigset_t's. */ + if (((compat_size_t)sigsetsize) != sizeof(sigset_t)) { + regs->tstate |= TSTATE_ICARRY; + regs->u_regs[UREG_I0] = EINVAL; + return; + } + if (copy_from_user(&set32, compat_ptr(uset), sizeof(set32))) { + regs->tstate |= TSTATE_ICARRY; + regs->u_regs[UREG_I0] = EFAULT; + return; + } + switch (_NSIG_WORDS) { + case 4: set.sig[3] = set32.sig[6] + (((long)set32.sig[7]) << 32); + case 3: set.sig[2] = set32.sig[4] + (((long)set32.sig[5]) << 32); + case 2: set.sig[1] = set32.sig[2] + (((long)set32.sig[3]) << 32); + case 1: set.sig[0] = set32.sig[0] + (((long)set32.sig[1]) << 32); + } + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + oldset = current->blocked; + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + regs->tpc = regs->tnpc; + regs->tnpc += 4; + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + + /* Condition codes and return value where set here for sigpause, + * and so got used by setup_frame, which again causes sigreturn() + * to return -EINTR. + */ + while (1) { + current->state = TASK_INTERRUPTIBLE; + schedule(); + /* + * Return -EINTR and set condition code here, + * so the interrupted system call actually returns + * these. + */ + regs->tstate |= TSTATE_ICARRY; + regs->u_regs[UREG_I0] = EINTR; + if (do_signal32(&oldset, regs, 0, 0)) + return; + } +} + +static int restore_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) +{ + unsigned long *fpregs = current_thread_info()->fpregs; + unsigned long fprs; + int err; + + err = __get_user(fprs, &fpu->si_fprs); + fprs_write(0); + regs->tstate &= ~TSTATE_PEF; + if (fprs & FPRS_DL) + err |= copy_from_user(fpregs, &fpu->si_float_regs[0], (sizeof(unsigned int) * 32)); + if (fprs & FPRS_DU) + err |= copy_from_user(fpregs+16, &fpu->si_float_regs[32], (sizeof(unsigned int) * 32)); + err |= __get_user(current_thread_info()->xfsr[0], &fpu->si_fsr); + err |= __get_user(current_thread_info()->gsr[0], &fpu->si_gsr); + current_thread_info()->fpsaved[0] |= fprs; + return err; +} + +void do_new_sigreturn32(struct pt_regs *regs) +{ + struct new_signal_frame32 __user *sf; + unsigned int psr; + unsigned pc, npc, fpu_save; + sigset_t set; + unsigned seta[_COMPAT_NSIG_WORDS]; + int err, i; + + regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; + sf = (struct new_signal_frame32 __user *) regs->u_regs[UREG_FP]; + + /* 1. Make sure we are not getting garbage from the user */ + if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || + (((unsigned long) sf) & 3)) + goto segv; + + get_user(pc, &sf->info.si_regs.pc); + __get_user(npc, &sf->info.si_regs.npc); + + if ((pc | npc) & 3) + goto segv; + + if (test_thread_flag(TIF_32BIT)) { + pc &= 0xffffffff; + npc &= 0xffffffff; + } + regs->tpc = pc; + regs->tnpc = npc; + + /* 2. Restore the state */ + err = __get_user(regs->y, &sf->info.si_regs.y); + err |= __get_user(psr, &sf->info.si_regs.psr); + + for (i = UREG_G1; i <= UREG_I7; i++) + err |= __get_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); + if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { + err |= __get_user(i, &sf->v8plus.g_upper[0]); + if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { + unsigned long asi; + + for (i = UREG_G1; i <= UREG_I7; i++) + err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); + err |= __get_user(asi, &sf->v8plus.asi); + regs->tstate &= ~TSTATE_ASI; + regs->tstate |= ((asi & 0xffUL) << 24UL); + } + } + + /* User can only change condition codes in %tstate. */ + regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); + regs->tstate |= psr_to_tstate_icc(psr); + + err |= __get_user(fpu_save, &sf->fpu_save); + if (fpu_save) + err |= restore_fpu_state32(regs, &sf->fpu_state); + err |= __get_user(seta[0], &sf->info.si_mask); + err |= copy_from_user(seta+1, &sf->extramask, + (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); + if (err) + goto segv; + switch (_NSIG_WORDS) { + case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); + case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); + case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); + case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); + } + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + return; + +segv: + force_sig(SIGSEGV, current); +} + +asmlinkage void do_sigreturn32(struct pt_regs *regs) +{ + struct sigcontext32 __user *scptr; + unsigned int pc, npc, psr; + sigset_t set; + unsigned int seta[_COMPAT_NSIG_WORDS]; + int err; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + synchronize_user_stack(); + if (test_thread_flag(TIF_NEWSIGNALS)) { + do_new_sigreturn32(regs); + return; + } + + scptr = (struct sigcontext32 __user *) + (regs->u_regs[UREG_I0] & 0x00000000ffffffffUL); + /* Check sanity of the user arg. */ + if (!access_ok(VERIFY_READ, scptr, sizeof(struct sigcontext32)) || + (((unsigned long) scptr) & 3)) + goto segv; + + err = __get_user(pc, &scptr->sigc_pc); + err |= __get_user(npc, &scptr->sigc_npc); + + if ((pc | npc) & 3) + goto segv; /* Nice try. */ + + err |= __get_user(seta[0], &scptr->sigc_mask); + /* Note that scptr + 1 points to extramask */ + err |= copy_from_user(seta+1, scptr + 1, + (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); + if (err) + goto segv; + switch (_NSIG_WORDS) { + case 4: set.sig[3] = seta[6] + (((long)seta[7]) << 32); + case 3: set.sig[2] = seta[4] + (((long)seta[5]) << 32); + case 2: set.sig[1] = seta[2] + (((long)seta[3]) << 32); + case 1: set.sig[0] = seta[0] + (((long)seta[1]) << 32); + } + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + if (test_thread_flag(TIF_32BIT)) { + pc &= 0xffffffff; + npc &= 0xffffffff; + } + regs->tpc = pc; + regs->tnpc = npc; + err = __get_user(regs->u_regs[UREG_FP], &scptr->sigc_sp); + err |= __get_user(regs->u_regs[UREG_I0], &scptr->sigc_o0); + err |= __get_user(regs->u_regs[UREG_G1], &scptr->sigc_g1); + + /* User can only change condition codes in %tstate. */ + err |= __get_user(psr, &scptr->sigc_psr); + if (err) + goto segv; + regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); + regs->tstate |= psr_to_tstate_icc(psr); + return; + +segv: + force_sig(SIGSEGV, current); +} + +asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) +{ + struct rt_signal_frame32 __user *sf; + unsigned int psr, pc, npc, fpu_save, u_ss_sp; + mm_segment_t old_fs; + sigset_t set; + compat_sigset_t seta; + stack_t st; + int err, i; + + /* Always make any pending restarted system calls return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + synchronize_user_stack(); + regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; + sf = (struct rt_signal_frame32 __user *) regs->u_regs[UREG_FP]; + + /* 1. Make sure we are not getting garbage from the user */ + if (!access_ok(VERIFY_READ, sf, sizeof(*sf)) || + (((unsigned long) sf) & 3)) + goto segv; + + get_user(pc, &sf->regs.pc); + __get_user(npc, &sf->regs.npc); + + if ((pc | npc) & 3) + goto segv; + + if (test_thread_flag(TIF_32BIT)) { + pc &= 0xffffffff; + npc &= 0xffffffff; + } + regs->tpc = pc; + regs->tnpc = npc; + + /* 2. Restore the state */ + err = __get_user(regs->y, &sf->regs.y); + err |= __get_user(psr, &sf->regs.psr); + + for (i = UREG_G1; i <= UREG_I7; i++) + err |= __get_user(regs->u_regs[i], &sf->regs.u_regs[i]); + if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS) { + err |= __get_user(i, &sf->v8plus.g_upper[0]); + if (i == SIGINFO_EXTRA_V8PLUS_MAGIC) { + unsigned long asi; + + for (i = UREG_G1; i <= UREG_I7; i++) + err |= __get_user(((u32 *)regs->u_regs)[2*i], &sf->v8plus.g_upper[i]); + err |= __get_user(asi, &sf->v8plus.asi); + regs->tstate &= ~TSTATE_ASI; + regs->tstate |= ((asi & 0xffUL) << 24UL); + } + } + + /* User can only change condition codes in %tstate. */ + regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); + regs->tstate |= psr_to_tstate_icc(psr); + + err |= __get_user(fpu_save, &sf->fpu_save); + if (fpu_save) + err |= restore_fpu_state32(regs, &sf->fpu_state); + err |= copy_from_user(&seta, &sf->mask, sizeof(compat_sigset_t)); + err |= __get_user(u_ss_sp, &sf->stack.ss_sp); + st.ss_sp = compat_ptr(u_ss_sp); + err |= __get_user(st.ss_flags, &sf->stack.ss_flags); + err |= __get_user(st.ss_size, &sf->stack.ss_size); + if (err) + goto segv; + + /* It is more difficult to avoid calling this function than to + call it and ignore errors. */ + old_fs = get_fs(); + set_fs(KERNEL_DS); + do_sigaltstack((stack_t __user *) &st, NULL, (unsigned long)sf); + set_fs(old_fs); + + switch (_NSIG_WORDS) { + case 4: set.sig[3] = seta.sig[6] + (((long)seta.sig[7]) << 32); + case 3: set.sig[2] = seta.sig[4] + (((long)seta.sig[5]) << 32); + case 2: set.sig[1] = seta.sig[2] + (((long)seta.sig[3]) << 32); + case 1: set.sig[0] = seta.sig[0] + (((long)seta.sig[1]) << 32); + } + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + return; +segv: + force_sig(SIGSEGV, current); +} + +/* Checks if the fp is valid */ +static int invalid_frame_pointer(void __user *fp, int fplen) +{ + if ((((unsigned long) fp) & 7) || ((unsigned long)fp) > 0x100000000ULL - fplen) + return 1; + return 0; +} + +static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, unsigned long framesize) +{ + unsigned long sp; + + regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; + sp = regs->u_regs[UREG_FP]; + + /* This is the X/Open sanctioned signal stack switching. */ + if (sa->sa_flags & SA_ONSTACK) { + if (!on_sig_stack(sp) && !((current->sas_ss_sp + current->sas_ss_size) & 7)) + sp = current->sas_ss_sp + current->sas_ss_size; + } + return (void __user *)(sp - framesize); +} + +static void +setup_frame32(struct sigaction *sa, struct pt_regs *regs, int signr, sigset_t *oldset, siginfo_t *info) +{ + struct signal_sframe32 __user *sframep; + struct sigcontext32 __user *sc; + unsigned int seta[_COMPAT_NSIG_WORDS]; + int err = 0; + void __user *sig_address; + int sig_code; + unsigned long pc = regs->tpc; + unsigned long npc = regs->tnpc; + unsigned int psr; + + if (test_thread_flag(TIF_32BIT)) { + pc &= 0xffffffff; + npc &= 0xffffffff; + } + + synchronize_user_stack(); + save_and_clear_fpu(); + + sframep = (struct signal_sframe32 __user *) + get_sigframe(sa, regs, SF_ALIGNEDSZ); + if (invalid_frame_pointer(sframep, sizeof(*sframep))){ + /* Don't change signal code and address, so that + * post mortem debuggers can have a look. + */ + do_exit(SIGILL); + } + + sc = &sframep->sig_context; + + /* We've already made sure frame pointer isn't in kernel space... */ + err = __put_user((sas_ss_flags(regs->u_regs[UREG_FP]) == SS_ONSTACK), + &sc->sigc_onstack); + + switch (_NSIG_WORDS) { + case 4: seta[7] = (oldset->sig[3] >> 32); + seta[6] = oldset->sig[3]; + case 3: seta[5] = (oldset->sig[2] >> 32); + seta[4] = oldset->sig[2]; + case 2: seta[3] = (oldset->sig[1] >> 32); + seta[2] = oldset->sig[1]; + case 1: seta[1] = (oldset->sig[0] >> 32); + seta[0] = oldset->sig[0]; + } + err |= __put_user(seta[0], &sc->sigc_mask); + err |= __copy_to_user(sframep->extramask, seta + 1, + (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); + err |= __put_user(regs->u_regs[UREG_FP], &sc->sigc_sp); + err |= __put_user(pc, &sc->sigc_pc); + err |= __put_user(npc, &sc->sigc_npc); + psr = tstate_to_psr(regs->tstate); + if (current_thread_info()->fpsaved[0] & FPRS_FEF) + psr |= PSR_EF; + err |= __put_user(psr, &sc->sigc_psr); + err |= __put_user(regs->u_regs[UREG_G1], &sc->sigc_g1); + err |= __put_user(regs->u_regs[UREG_I0], &sc->sigc_o0); + err |= __put_user(get_thread_wsaved(), &sc->sigc_oswins); + + err |= copy_in_user((u32 __user *)sframep, + (u32 __user *)(regs->u_regs[UREG_FP]), + sizeof(struct reg_window32)); + + set_thread_wsaved(0); /* So process is allowed to execute. */ + err |= __put_user(signr, &sframep->sig_num); + sig_address = NULL; + sig_code = 0; + if (SI_FROMKERNEL (info) && (info->si_code & __SI_MASK) == __SI_FAULT) { + sig_address = info->si_addr; + switch (signr) { + case SIGSEGV: + switch (info->si_code) { + case SEGV_MAPERR: sig_code = SUBSIG_NOMAPPING; break; + default: sig_code = SUBSIG_PROTECTION; break; + } + break; + case SIGILL: + switch (info->si_code) { + case ILL_ILLOPC: sig_code = SUBSIG_ILLINST; break; + case ILL_PRVOPC: sig_code = SUBSIG_PRIVINST; break; + case ILL_ILLTRP: sig_code = SUBSIG_BADTRAP(info->si_trapno); break; + default: sig_code = SUBSIG_STACK; break; + } + break; + case SIGFPE: + switch (info->si_code) { + case FPE_INTDIV: sig_code = SUBSIG_IDIVZERO; break; + case FPE_INTOVF: sig_code = SUBSIG_FPINTOVFL; break; + case FPE_FLTDIV: sig_code = SUBSIG_FPDIVZERO; break; + case FPE_FLTOVF: sig_code = SUBSIG_FPOVFLOW; break; + case FPE_FLTUND: sig_code = SUBSIG_FPUNFLOW; break; + case FPE_FLTRES: sig_code = SUBSIG_FPINEXACT; break; + case FPE_FLTINV: sig_code = SUBSIG_FPOPERROR; break; + default: sig_code = SUBSIG_FPERROR; break; + } + break; + case SIGBUS: + switch (info->si_code) { + case BUS_ADRALN: sig_code = SUBSIG_ALIGNMENT; break; + case BUS_ADRERR: sig_code = SUBSIG_MISCERROR; break; + default: sig_code = SUBSIG_BUSTIMEOUT; break; + } + break; + case SIGEMT: + switch (info->si_code) { + case EMT_TAGOVF: sig_code = SUBSIG_TAG; break; + } + break; + case SIGSYS: + if (info->si_code == (__SI_FAULT|0x100)) { + /* See sys_sunos32.c */ + sig_code = info->si_trapno; + break; + } + default: + sig_address = NULL; + } + } + err |= __put_user(ptr_to_compat(sig_address), &sframep->sig_address); + err |= __put_user(sig_code, &sframep->sig_code); + err |= __put_user(ptr_to_compat(sc), &sframep->sig_scptr); + if (err) + goto sigsegv; + + regs->u_regs[UREG_FP] = (unsigned long) sframep; + regs->tpc = (unsigned long) sa->sa_handler; + regs->tnpc = (regs->tpc + 4); + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + return; + +sigsegv: + force_sigsegv(signr, current); +} + + +static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu) +{ + unsigned long *fpregs = current_thread_info()->fpregs; + unsigned long fprs; + int err = 0; + + fprs = current_thread_info()->fpsaved[0]; + if (fprs & FPRS_DL) + err |= copy_to_user(&fpu->si_float_regs[0], fpregs, + (sizeof(unsigned int) * 32)); + if (fprs & FPRS_DU) + err |= copy_to_user(&fpu->si_float_regs[32], fpregs+16, + (sizeof(unsigned int) * 32)); + err |= __put_user(current_thread_info()->xfsr[0], &fpu->si_fsr); + err |= __put_user(current_thread_info()->gsr[0], &fpu->si_gsr); + err |= __put_user(fprs, &fpu->si_fprs); + + return err; +} + +static void new_setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, + int signo, sigset_t *oldset) +{ + struct new_signal_frame32 __user *sf; + int sigframe_size; + u32 psr; + int i, err; + unsigned int seta[_COMPAT_NSIG_WORDS]; + + /* 1. Make sure everything is clean */ + synchronize_user_stack(); + save_and_clear_fpu(); + + sigframe_size = NF_ALIGNEDSZ; + if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) + sigframe_size -= sizeof(__siginfo_fpu_t); + + sf = (struct new_signal_frame32 __user *) + get_sigframe(&ka->sa, regs, sigframe_size); + + if (invalid_frame_pointer(sf, sigframe_size)) + goto sigill; + + if (get_thread_wsaved() != 0) + goto sigill; + + /* 2. Save the current process state */ + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + err = put_user(regs->tpc, &sf->info.si_regs.pc); + err |= __put_user(regs->tnpc, &sf->info.si_regs.npc); + err |= __put_user(regs->y, &sf->info.si_regs.y); + psr = tstate_to_psr(regs->tstate); + if (current_thread_info()->fpsaved[0] & FPRS_FEF) + psr |= PSR_EF; + err |= __put_user(psr, &sf->info.si_regs.psr); + for (i = 0; i < 16; i++) + err |= __put_user(regs->u_regs[i], &sf->info.si_regs.u_regs[i]); + err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); + err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); + for (i = 1; i < 16; i++) + err |= __put_user(((u32 *)regs->u_regs)[2*i], + &sf->v8plus.g_upper[i]); + err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, + &sf->v8plus.asi); + + if (psr & PSR_EF) { + err |= save_fpu_state32(regs, &sf->fpu_state); + err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); + } else { + err |= __put_user(0, &sf->fpu_save); + } + + switch (_NSIG_WORDS) { + case 4: seta[7] = (oldset->sig[3] >> 32); + seta[6] = oldset->sig[3]; + case 3: seta[5] = (oldset->sig[2] >> 32); + seta[4] = oldset->sig[2]; + case 2: seta[3] = (oldset->sig[1] >> 32); + seta[2] = oldset->sig[1]; + case 1: seta[1] = (oldset->sig[0] >> 32); + seta[0] = oldset->sig[0]; + } + err |= __put_user(seta[0], &sf->info.si_mask); + err |= __copy_to_user(sf->extramask, seta + 1, + (_COMPAT_NSIG_WORDS - 1) * sizeof(unsigned int)); + + err |= copy_in_user((u32 __user *)sf, + (u32 __user *)(regs->u_regs[UREG_FP]), + sizeof(struct reg_window32)); + + if (err) + goto sigsegv; + + /* 3. signal handler back-trampoline and parameters */ + regs->u_regs[UREG_FP] = (unsigned long) sf; + regs->u_regs[UREG_I0] = signo; + regs->u_regs[UREG_I1] = (unsigned long) &sf->info; + regs->u_regs[UREG_I2] = (unsigned long) &sf->info; + + /* 4. signal handler */ + regs->tpc = (unsigned long) ka->sa.sa_handler; + regs->tnpc = (regs->tpc + 4); + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + + /* 5. return to kernel instructions */ + if (ka->ka_restorer) { + regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; + } else { + /* Flush instruction space. */ + unsigned long address = ((unsigned long)&(sf->insns[0])); + pgd_t *pgdp = pgd_offset(current->mm, address); + pud_t *pudp = pud_offset(pgdp, address); + pmd_t *pmdp = pmd_offset(pudp, address); + pte_t *ptep; + + regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); + + err = __put_user(0x821020d8, &sf->insns[0]); /*mov __NR_sigreturn, %g1*/ + err |= __put_user(0x91d02010, &sf->insns[1]); /*t 0x10*/ + if (err) + goto sigsegv; + + preempt_disable(); + ptep = pte_offset_map(pmdp, address); + if (pte_present(*ptep)) { + unsigned long page = (unsigned long) + page_address(pte_page(*ptep)); + + __asm__ __volatile__( + " membar #StoreStore\n" + " flush %0 + %1" + : : "r" (page), "r" (address & (PAGE_SIZE - 1)) + : "memory"); + } + pte_unmap(ptep); + preempt_enable(); + } + return; + +sigill: + do_exit(SIGILL); +sigsegv: + force_sigsegv(signo, current); +} + +/* Setup a Solaris stack frame */ +static void +setup_svr4_frame32(struct sigaction *sa, unsigned long pc, unsigned long npc, + struct pt_regs *regs, int signr, sigset_t *oldset) +{ + svr4_signal_frame_t __user *sfp; + svr4_gregset_t __user *gr; + svr4_siginfo_t __user *si; + svr4_mcontext_t __user *mc; + svr4_gwindows_t __user *gw; + svr4_ucontext_t __user *uc; + svr4_sigset_t setv; + unsigned int psr; + int i, err; + + synchronize_user_stack(); + save_and_clear_fpu(); + + regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL; + sfp = (svr4_signal_frame_t __user *) + get_sigframe(sa, regs, + sizeof(struct reg_window32) + SVR4_SF_ALIGNED); + + if (invalid_frame_pointer(sfp, sizeof(*sfp))) + do_exit(SIGILL); + + /* Start with a clean frame pointer and fill it */ + err = clear_user(sfp, sizeof(*sfp)); + + /* Setup convenience variables */ + si = &sfp->si; + uc = &sfp->uc; + gw = &sfp->gw; + mc = &uc->mcontext; + gr = &mc->greg; + + /* FIXME: where am I supposed to put this? + * sc->sigc_onstack = old_status; + * anyways, it does not look like it is used for anything at all. + */ + setv.sigbits[0] = oldset->sig[0]; + setv.sigbits[1] = (oldset->sig[0] >> 32); + if (_NSIG_WORDS >= 2) { + setv.sigbits[2] = oldset->sig[1]; + setv.sigbits[3] = (oldset->sig[1] >> 32); + err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); + } else + err |= __copy_to_user(&uc->sigmask, &setv, + 2 * sizeof(unsigned int)); + + /* Store registers */ + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + err |= __put_user(regs->tpc, &((*gr)[SVR4_PC])); + err |= __put_user(regs->tnpc, &((*gr)[SVR4_NPC])); + psr = tstate_to_psr(regs->tstate); + if (current_thread_info()->fpsaved[0] & FPRS_FEF) + psr |= PSR_EF; + err |= __put_user(psr, &((*gr)[SVR4_PSR])); + err |= __put_user(regs->y, &((*gr)[SVR4_Y])); + + /* Copy g[1..7] and o[0..7] registers */ + for (i = 0; i < 7; i++) + err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); + for (i = 0; i < 8; i++) + err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); + + /* Setup sigaltstack */ + err |= __put_user(current->sas_ss_sp, &uc->stack.sp); + err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); + err |= __put_user(current->sas_ss_size, &uc->stack.size); + + /* Save the currently window file: */ + + /* 1. Link sfp->uc->gwins to our windows */ + err |= __put_user(ptr_to_compat(gw), &mc->gwin); + + /* 2. Number of windows to restore at setcontext (): */ + err |= __put_user(get_thread_wsaved(), &gw->count); + + /* 3. We just pay attention to the gw->count field on setcontext */ + set_thread_wsaved(0); /* So process is allowed to execute. */ + + /* Setup the signal information. Solaris expects a bunch of + * information to be passed to the signal handler, we don't provide + * that much currently, should use siginfo. + */ + err |= __put_user(signr, &si->siginfo.signo); + err |= __put_user(SVR4_SINOINFO, &si->siginfo.code); + if (err) + goto sigsegv; + + regs->u_regs[UREG_FP] = (unsigned long) sfp; + regs->tpc = (unsigned long) sa->sa_handler; + regs->tnpc = (regs->tpc + 4); + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + + /* Arguments passed to signal handler */ + if (regs->u_regs[14]){ + struct reg_window32 __user *rw = (struct reg_window32 __user *) + (regs->u_regs[14] & 0x00000000ffffffffUL); + + err |= __put_user(signr, &rw->ins[0]); + err |= __put_user((u64)si, &rw->ins[1]); + err |= __put_user((u64)uc, &rw->ins[2]); + err |= __put_user((u64)sfp, &rw->ins[6]); /* frame pointer */ + if (err) + goto sigsegv; + + regs->u_regs[UREG_I0] = signr; + regs->u_regs[UREG_I1] = (u32)(u64) si; + regs->u_regs[UREG_I2] = (u32)(u64) uc; + } + return; + +sigsegv: + force_sigsegv(signr, current); +} + +asmlinkage int +svr4_getcontext(svr4_ucontext_t __user *uc, struct pt_regs *regs) +{ + svr4_gregset_t __user *gr; + svr4_mcontext_t __user *mc; + svr4_sigset_t setv; + int i, err; + u32 psr; + + synchronize_user_stack(); + save_and_clear_fpu(); + + if (get_thread_wsaved()) + do_exit(SIGSEGV); + + err = clear_user(uc, sizeof(*uc)); + + /* Setup convenience variables */ + mc = &uc->mcontext; + gr = &mc->greg; + + setv.sigbits[0] = current->blocked.sig[0]; + setv.sigbits[1] = (current->blocked.sig[0] >> 32); + if (_NSIG_WORDS >= 2) { + setv.sigbits[2] = current->blocked.sig[1]; + setv.sigbits[3] = (current->blocked.sig[1] >> 32); + err |= __copy_to_user(&uc->sigmask, &setv, sizeof(svr4_sigset_t)); + } else + err |= __copy_to_user(&uc->sigmask, &setv, 2 * sizeof(unsigned)); + + /* Store registers */ + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + err |= __put_user(regs->tpc, &uc->mcontext.greg[SVR4_PC]); + err |= __put_user(regs->tnpc, &uc->mcontext.greg[SVR4_NPC]); + + psr = tstate_to_psr(regs->tstate) & ~PSR_EF; + if (current_thread_info()->fpsaved[0] & FPRS_FEF) + psr |= PSR_EF; + err |= __put_user(psr, &uc->mcontext.greg[SVR4_PSR]); + + err |= __put_user(regs->y, &uc->mcontext.greg[SVR4_Y]); + + /* Copy g[1..7] and o[0..7] registers */ + for (i = 0; i < 7; i++) + err |= __put_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); + for (i = 0; i < 8; i++) + err |= __put_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); + + /* Setup sigaltstack */ + err |= __put_user(current->sas_ss_sp, &uc->stack.sp); + err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &uc->stack.flags); + err |= __put_user(current->sas_ss_size, &uc->stack.size); + + /* The register file is not saved + * we have already stuffed all of it with sync_user_stack + */ + return (err ? -EFAULT : 0); +} + + +/* Set the context for a svr4 application, this is Solaris way to sigreturn */ +asmlinkage int svr4_setcontext(svr4_ucontext_t __user *c, struct pt_regs *regs) +{ + svr4_gregset_t __user *gr; + mm_segment_t old_fs; + u32 pc, npc, psr, u_ss_sp; + sigset_t set; + svr4_sigset_t setv; + int i, err; + stack_t st; + + /* Fixme: restore windows, or is this already taken care of in + * svr4_setup_frame when sync_user_windows is done? + */ + flush_user_windows(); + + if (get_thread_wsaved()) + goto sigsegv; + + if (((unsigned long) c) & 3){ + printk("Unaligned structure passed\n"); + goto sigsegv; + } + + if (!__access_ok(c, sizeof(*c))) { + /* Miguel, add nice debugging msg _here_. ;-) */ + goto sigsegv; + } + + /* Check for valid PC and nPC */ + gr = &c->mcontext.greg; + err = __get_user(pc, &((*gr)[SVR4_PC])); + err |= __get_user(npc, &((*gr)[SVR4_NPC])); + if ((pc | npc) & 3) + goto sigsegv; + + /* Retrieve information from passed ucontext */ + /* note that nPC is ored a 1, this is used to inform entry.S */ + /* that we don't want it to mess with our PC and nPC */ + + err |= copy_from_user(&setv, &c->sigmask, sizeof(svr4_sigset_t)); + set.sig[0] = setv.sigbits[0] | (((long)setv.sigbits[1]) << 32); + if (_NSIG_WORDS >= 2) + set.sig[1] = setv.sigbits[2] | (((long)setv.sigbits[3]) << 32); + + err |= __get_user(u_ss_sp, &c->stack.sp); + st.ss_sp = compat_ptr(u_ss_sp); + err |= __get_user(st.ss_flags, &c->stack.flags); + err |= __get_user(st.ss_size, &c->stack.size); + if (err) + goto sigsegv; + + /* It is more difficult to avoid calling this function than to + call it and ignore errors. */ + old_fs = get_fs(); + set_fs(KERNEL_DS); + do_sigaltstack((stack_t __user *) &st, NULL, regs->u_regs[UREG_I6]); + set_fs(old_fs); + + sigdelsetmask(&set, ~_BLOCKABLE); + spin_lock_irq(¤t->sighand->siglock); + current->blocked = set; + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + regs->tpc = pc; + regs->tnpc = npc | 1; + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + err |= __get_user(regs->y, &((*gr)[SVR4_Y])); + err |= __get_user(psr, &((*gr)[SVR4_PSR])); + regs->tstate &= ~(TSTATE_ICC|TSTATE_XCC); + regs->tstate |= psr_to_tstate_icc(psr); + + /* Restore g[1..7] and o[0..7] registers */ + for (i = 0; i < 7; i++) + err |= __get_user(regs->u_regs[UREG_G1+i], (&(*gr)[SVR4_G1])+i); + for (i = 0; i < 8; i++) + err |= __get_user(regs->u_regs[UREG_I0+i], (&(*gr)[SVR4_O0])+i); + if (err) + goto sigsegv; + + return -EINTR; +sigsegv: + return -EFAULT; +} + +static void setup_rt_frame32(struct k_sigaction *ka, struct pt_regs *regs, + unsigned long signr, sigset_t *oldset, + siginfo_t *info) +{ + struct rt_signal_frame32 __user *sf; + int sigframe_size; + u32 psr; + int i, err; + compat_sigset_t seta; + + /* 1. Make sure everything is clean */ + synchronize_user_stack(); + save_and_clear_fpu(); + + sigframe_size = RT_ALIGNEDSZ; + if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) + sigframe_size -= sizeof(__siginfo_fpu_t); + + sf = (struct rt_signal_frame32 __user *) + get_sigframe(&ka->sa, regs, sigframe_size); + + if (invalid_frame_pointer(sf, sigframe_size)) + goto sigill; + + if (get_thread_wsaved() != 0) + goto sigill; + + /* 2. Save the current process state */ + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + err = put_user(regs->tpc, &sf->regs.pc); + err |= __put_user(regs->tnpc, &sf->regs.npc); + err |= __put_user(regs->y, &sf->regs.y); + psr = tstate_to_psr(regs->tstate); + if (current_thread_info()->fpsaved[0] & FPRS_FEF) + psr |= PSR_EF; + err |= __put_user(psr, &sf->regs.psr); + for (i = 0; i < 16; i++) + err |= __put_user(regs->u_regs[i], &sf->regs.u_regs[i]); + err |= __put_user(sizeof(siginfo_extra_v8plus_t), &sf->extra_size); + err |= __put_user(SIGINFO_EXTRA_V8PLUS_MAGIC, &sf->v8plus.g_upper[0]); + for (i = 1; i < 16; i++) + err |= __put_user(((u32 *)regs->u_regs)[2*i], + &sf->v8plus.g_upper[i]); + err |= __put_user((regs->tstate & TSTATE_ASI) >> 24UL, + &sf->v8plus.asi); + + if (psr & PSR_EF) { + err |= save_fpu_state32(regs, &sf->fpu_state); + err |= __put_user((u64)&sf->fpu_state, &sf->fpu_save); + } else { + err |= __put_user(0, &sf->fpu_save); + } + + /* Update the siginfo structure. */ + err |= copy_siginfo_to_user32(&sf->info, info); + + /* Setup sigaltstack */ + err |= __put_user(current->sas_ss_sp, &sf->stack.ss_sp); + err |= __put_user(sas_ss_flags(regs->u_regs[UREG_FP]), &sf->stack.ss_flags); + err |= __put_user(current->sas_ss_size, &sf->stack.ss_size); + + switch (_NSIG_WORDS) { + case 4: seta.sig[7] = (oldset->sig[3] >> 32); + seta.sig[6] = oldset->sig[3]; + case 3: seta.sig[5] = (oldset->sig[2] >> 32); + seta.sig[4] = oldset->sig[2]; + case 2: seta.sig[3] = (oldset->sig[1] >> 32); + seta.sig[2] = oldset->sig[1]; + case 1: seta.sig[1] = (oldset->sig[0] >> 32); + seta.sig[0] = oldset->sig[0]; + } + err |= __copy_to_user(&sf->mask, &seta, sizeof(compat_sigset_t)); + + err |= copy_in_user((u32 __user *)sf, + (u32 __user *)(regs->u_regs[UREG_FP]), + sizeof(struct reg_window32)); + if (err) + goto sigsegv; + + /* 3. signal handler back-trampoline and parameters */ + regs->u_regs[UREG_FP] = (unsigned long) sf; + regs->u_regs[UREG_I0] = signr; + regs->u_regs[UREG_I1] = (unsigned long) &sf->info; + regs->u_regs[UREG_I2] = (unsigned long) &sf->regs; + + /* 4. signal handler */ + regs->tpc = (unsigned long) ka->sa.sa_handler; + regs->tnpc = (regs->tpc + 4); + if (test_thread_flag(TIF_32BIT)) { + regs->tpc &= 0xffffffff; + regs->tnpc &= 0xffffffff; + } + + /* 5. return to kernel instructions */ + if (ka->ka_restorer) + regs->u_regs[UREG_I7] = (unsigned long)ka->ka_restorer; + else { + /* Flush instruction space. */ + unsigned long address = ((unsigned long)&(sf->insns[0])); + pgd_t *pgdp = pgd_offset(current->mm, address); + pud_t *pudp = pud_offset(pgdp, address); + pmd_t *pmdp = pmd_offset(pudp, address); + pte_t *ptep; + + regs->u_regs[UREG_I7] = (unsigned long) (&(sf->insns[0]) - 2); + + /* mov __NR_rt_sigreturn, %g1 */ + err |= __put_user(0x82102065, &sf->insns[0]); + + /* t 0x10 */ + err |= __put_user(0x91d02010, &sf->insns[1]); + if (err) + goto sigsegv; + + preempt_disable(); + ptep = pte_offset_map(pmdp, address); + if (pte_present(*ptep)) { + unsigned long page = (unsigned long) + page_address(pte_page(*ptep)); + + __asm__ __volatile__( + " membar #StoreStore\n" + " flush %0 + %1" + : : "r" (page), "r" (address & (PAGE_SIZE - 1)) + : "memory"); + } + pte_unmap(ptep); + preempt_enable(); + } + return; + +sigill: + do_exit(SIGILL); +sigsegv: + force_sigsegv(signr, current); +} + +static inline void handle_signal32(unsigned long signr, struct k_sigaction *ka, + siginfo_t *info, + sigset_t *oldset, struct pt_regs *regs, + int svr4_signal) +{ + if (svr4_signal) + setup_svr4_frame32(&ka->sa, regs->tpc, regs->tnpc, + regs, signr, oldset); + else { + if (ka->sa.sa_flags & SA_SIGINFO) + setup_rt_frame32(ka, regs, signr, oldset, info); + else if (test_thread_flag(TIF_NEWSIGNALS)) + new_setup_frame32(ka, regs, signr, oldset); + else + setup_frame32(&ka->sa, regs, signr, oldset, info); + } + if (!(ka->sa.sa_flags & SA_NOMASK)) { + spin_lock_irq(¤t->sighand->siglock); + sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); + sigaddset(¤t->blocked,signr); + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + } +} + +static inline void syscall_restart32(unsigned long orig_i0, struct pt_regs *regs, + struct sigaction *sa) +{ + switch (regs->u_regs[UREG_I0]) { + case ERESTART_RESTARTBLOCK: + case ERESTARTNOHAND: + no_system_call_restart: + regs->u_regs[UREG_I0] = EINTR; + regs->tstate |= TSTATE_ICARRY; + break; + case ERESTARTSYS: + if (!(sa->sa_flags & SA_RESTART)) + goto no_system_call_restart; + /* fallthrough */ + case ERESTARTNOINTR: + regs->u_regs[UREG_I0] = orig_i0; + regs->tpc -= 4; + regs->tnpc -= 4; + } +} + +/* Note that 'init' is a special process: it doesn't get signals it doesn't + * want to handle. Thus you cannot kill init even with a SIGKILL even by + * mistake. + */ +int do_signal32(sigset_t *oldset, struct pt_regs * regs, + unsigned long orig_i0, int restart_syscall) +{ + siginfo_t info; + struct signal_deliver_cookie cookie; + struct k_sigaction ka; + int signr; + int svr4_signal = current->personality == PER_SVR4; + + cookie.restart_syscall = restart_syscall; + cookie.orig_i0 = orig_i0; + + signr = get_signal_to_deliver(&info, &ka, regs, &cookie); + if (signr > 0) { + if (cookie.restart_syscall) + syscall_restart32(orig_i0, regs, &ka.sa); + handle_signal32(signr, &ka, &info, oldset, + regs, svr4_signal); + return 1; + } + if (cookie.restart_syscall && + (regs->u_regs[UREG_I0] == ERESTARTNOHAND || + regs->u_regs[UREG_I0] == ERESTARTSYS || + regs->u_regs[UREG_I0] == ERESTARTNOINTR)) { + /* replay the system call when we are done */ + regs->u_regs[UREG_I0] = cookie.orig_i0; + regs->tpc -= 4; + regs->tnpc -= 4; + } + if (cookie.restart_syscall && + regs->u_regs[UREG_I0] == ERESTART_RESTARTBLOCK) { + regs->u_regs[UREG_G1] = __NR_restart_syscall; + regs->tpc -= 4; + regs->tnpc -= 4; + } + return 0; +} + +struct sigstack32 { + u32 the_stack; + int cur_status; +}; + +asmlinkage int do_sys32_sigstack(u32 u_ssptr, u32 u_ossptr, unsigned long sp) +{ + struct sigstack32 __user *ssptr = + (struct sigstack32 __user *)((unsigned long)(u_ssptr)); + struct sigstack32 __user *ossptr = + (struct sigstack32 __user *)((unsigned long)(u_ossptr)); + int ret = -EFAULT; + + /* First see if old state is wanted. */ + if (ossptr) { + if (put_user(current->sas_ss_sp + current->sas_ss_size, + &ossptr->the_stack) || + __put_user(on_sig_stack(sp), &ossptr->cur_status)) + goto out; + } + + /* Now see if we want to update the new state. */ + if (ssptr) { + u32 ss_sp; + + if (get_user(ss_sp, &ssptr->the_stack)) + goto out; + + /* If the current stack was set with sigaltstack, don't + * swap stacks while we are on it. + */ + ret = -EPERM; + if (current->sas_ss_sp && on_sig_stack(sp)) + goto out; + + /* Since we don't know the extent of the stack, and we don't + * track onstack-ness, but rather calculate it, we must + * presume a size. Ho hum this interface is lossy. + */ + current->sas_ss_sp = (unsigned long)ss_sp - SIGSTKSZ; + current->sas_ss_size = SIGSTKSZ; + } + + ret = 0; +out: + return ret; +} + +asmlinkage long do_sys32_sigaltstack(u32 ussa, u32 uossa, unsigned long sp) +{ + stack_t uss, uoss; + u32 u_ss_sp = 0; + int ret; + mm_segment_t old_fs; + stack_t32 __user *uss32 = compat_ptr(ussa); + stack_t32 __user *uoss32 = compat_ptr(uossa); + + if (ussa && (get_user(u_ss_sp, &uss32->ss_sp) || + __get_user(uss.ss_flags, &uss32->ss_flags) || + __get_user(uss.ss_size, &uss32->ss_size))) + return -EFAULT; + uss.ss_sp = compat_ptr(u_ss_sp); + old_fs = get_fs(); + set_fs(KERNEL_DS); + ret = do_sigaltstack(ussa ? (stack_t __user *) &uss : NULL, + uossa ? (stack_t __user *) &uoss : NULL, sp); + set_fs(old_fs); + if (!ret && uossa && (put_user(ptr_to_compat(uoss.ss_sp), &uoss32->ss_sp) || + __put_user(uoss.ss_flags, &uoss32->ss_flags) || + __put_user(uoss.ss_size, &uoss32->ss_size))) + return -EFAULT; + return ret; +} |
