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Diffstat (limited to 'arch/sparc64/kernel/signal32.c')
-rw-r--r--arch/sparc64/kernel/signal32.c899
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(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->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(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->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(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NOMASK))
- sigaddset(&current->blocked,signr);
- recalc_sigpending();
- spin_unlock_irq(&current->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, &current->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;
-}