| /* $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/binfmts.h> |
| #include <linux/compat.h> |
| #include <linux/bitops.h> |
| |
| #include <asm/uaccess.h> |
| #include <asm/ptrace.h> |
| #include <asm/pgtable.h> |
| #include <asm/psrcompat.h> |
| #include <asm/fpumacro.h> |
| #include <asm/visasm.h> |
| #include <asm/compat_signal.h> |
| |
| #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) |
| |
| /* 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 { |
| compat_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: |
| err |= __put_user(from->si_trapno, &to->si_trapno); |
| 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); |
| err |= __put_user(from->si_fd, &to->si_fd); |
| 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; |
| } |
| |
| 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; |
| pte_t pte; |
| |
| 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); |
| pte = *ptep; |
| if (pte_present(pte)) { |
| unsigned long page = (unsigned long) |
| page_address(pte_page(pte)); |
| |
| wmb(); |
| __asm__ __volatile__("flush %0 + %1" |
| : /* no outputs */ |
| : "r" (page), |
| "r" (address & (PAGE_SIZE - 1)) |
| : "memory"); |
| } |
| pte_unmap(ptep); |
| preempt_enable(); |
| } |
| return; |
| |
| sigill: |
| do_exit(SIGILL); |
| sigsegv: |
| force_sigsegv(signo, current); |
| } |
| |
| 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)); |
| |
| wmb(); |
| __asm__ __volatile__("flush %0 + %1" |
| : /* no outputs */ |
| : "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) |
| { |
| 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); |
| spin_lock_irq(¤t->sighand->siglock); |
| sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask); |
| if (!(ka->sa.sa_flags & SA_NOMASK)) |
| 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. |
| */ |
| void 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; |
| |
| 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); |
| |
| /* a signal was successfully delivered; the saved |
| * sigmask will have been stored in the signal frame, |
| * and will be restored by sigreturn, so we can simply |
| * clear the TIF_RESTORE_SIGMASK flag. |
| */ |
| if (test_thread_flag(TIF_RESTORE_SIGMASK)) |
| clear_thread_flag(TIF_RESTORE_SIGMASK); |
| return; |
| } |
| 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; |
| } |
| |
| /* if there's no signal to deliver, we just put the saved sigmask |
| * back |
| */ |
| if (test_thread_flag(TIF_RESTORE_SIGMASK)) { |
| clear_thread_flag(TIF_RESTORE_SIGMASK); |
| sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); |
| } |
| } |
| |
| 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; |
| } |