diff options
Diffstat (limited to 'arch/sparc64/kernel/signal32.c')
| -rw-r--r-- | arch/sparc64/kernel/signal32.c | 899 |
1 files changed, 0 insertions, 899 deletions
diff --git a/arch/sparc64/kernel/signal32.c b/arch/sparc64/kernel/signal32.c deleted file mode 100644 index ba5b09ad666..00000000000 --- a/arch/sparc64/kernel/signal32.c +++ /dev/null @@ -1,899 +0,0 @@ -/* 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 <linux/tracehook.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))) - -/* 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; - -struct 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_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_sigreturn32(struct pt_regs *regs) -{ - struct signal_frame32 __user *sf; - unsigned int psr; - unsigned pc, npc, fpu_save; - sigset_t set; - unsigned seta[_COMPAT_NSIG_WORDS]; - 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 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); - - /* Prevent syscall restart. */ - pt_regs_clear_syscall(regs); - - 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_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); - - /* Prevent syscall restart. */ - pt_regs_clear_syscall(regs); - - 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]; - - /* - * If we are on the alternate signal stack and would overflow it, don't. - * Return an always-bogus address instead so we will die with SIGSEGV. - */ - if (on_sig_stack(sp) && !likely(on_sig_stack(sp - framesize))) - return (void __user *) -1L; - - /* This is the X/Open sanctioned signal stack switching. */ - if (sa->sa_flags & SA_ONSTACK) { - if (sas_ss_flags(sp) == 0) - sp = current->sas_ss_sp + current->sas_ss_size; - } - - /* Always align the stack frame. This handles two cases. First, - * sigaltstack need not be mindful of platform specific stack - * alignment. Second, if we took this signal because the stack - * is not aligned properly, we'd like to take the signal cleanly - * and report that. - */ - sp &= ~7UL; - - return (void __user *)(sp - framesize); -} - -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 setup_frame32(struct k_sigaction *ka, struct pt_regs *regs, - int signo, sigset_t *oldset) -{ - struct 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 = SF_ALIGNEDSZ; - if (!(current_thread_info()->fpsaved[0] & FPRS_FEF)) - sigframe_size -= sizeof(__siginfo_fpu_t); - - sf = (struct 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 - setup_frame32(ka, regs, signr, oldset); - - 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, - int restart_syscall, unsigned long orig_i0) -{ - struct k_sigaction ka; - siginfo_t info; - int signr; - - signr = get_signal_to_deliver(&info, &ka, regs, NULL); - - /* If the debugger messes with the program counter, it clears - * the "in syscall" bit, directing us to not perform a syscall - * restart. - */ - if (restart_syscall && !pt_regs_is_syscall(regs)) - restart_syscall = 0; - - if (signr > 0) { - if (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 TS_RESTORE_SIGMASK flag. - */ - current_thread_info()->status &= ~TS_RESTORE_SIGMASK; - - tracehook_signal_handler(signr, &info, &ka, regs, 0); - return; - } - if (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] = orig_i0; - regs->tpc -= 4; - regs->tnpc -= 4; - } - if (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 (current_thread_info()->status & TS_RESTORE_SIGMASK) { - current_thread_info()->status &= ~TS_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; -} |