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Diffstat (limited to 'arch/mips/kernel/signal32.c')
-rw-r--r--arch/mips/kernel/signal32.c288
1 files changed, 6 insertions, 282 deletions
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 78c8349d1..97b7c51b8 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -6,129 +6,26 @@
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright (C) 1994 - 2000, 2006 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2016, Imagination Technologies Ltd.
*/
-#include <linux/cache.h>
-#include <linux/compat.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/smp.h>
+#include <linux/compiler.h>
+#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/syscalls.h>
-#include <linux/errno.h>
-#include <linux/wait.h>
-#include <linux/ptrace.h>
-#include <linux/suspend.h>
-#include <linux/compiler.h>
-#include <linux/uaccess.h>
-#include <asm/abi.h>
-#include <asm/asm.h>
+#include <asm/compat.h>
#include <asm/compat-signal.h>
-#include <linux/bitops.h>
-#include <asm/cacheflush.h>
-#include <asm/sim.h>
-#include <asm/ucontext.h>
-#include <asm/fpu.h>
-#include <asm/war.h>
-#include <asm/dsp.h>
+#include <asm/uaccess.h>
+#include <asm/unistd.h>
#include "signal-common.h"
-/*
- * Including <asm/unistd.h> would give use the 64-bit syscall numbers ...
- */
-#define __NR_O32_restart_syscall 4253
-
/* 32-bit compatibility types */
typedef unsigned int __sighandler32_t;
typedef void (*vfptr_t)(void);
-struct ucontext32 {
- u32 uc_flags;
- s32 uc_link;
- compat_stack_t uc_stack;
- struct sigcontext32 uc_mcontext;
- compat_sigset_t uc_sigmask; /* mask last for extensibility */
-};
-
-struct sigframe32 {
- u32 sf_ass[4]; /* argument save space for o32 */
- u32 sf_pad[2]; /* Was: signal trampoline */
- struct sigcontext32 sf_sc;
- compat_sigset_t sf_mask;
-};
-
-struct rt_sigframe32 {
- u32 rs_ass[4]; /* argument save space for o32 */
- u32 rs_pad[2]; /* Was: signal trampoline */
- compat_siginfo_t rs_info;
- struct ucontext32 rs_uc;
-};
-
-static int setup_sigcontext32(struct pt_regs *regs,
- struct sigcontext32 __user *sc)
-{
- int err = 0;
- int i;
-
- err |= __put_user(regs->cp0_epc, &sc->sc_pc);
-
- err |= __put_user(0, &sc->sc_regs[0]);
- for (i = 1; i < 32; i++)
- err |= __put_user(regs->regs[i], &sc->sc_regs[i]);
-
- err |= __put_user(regs->hi, &sc->sc_mdhi);
- err |= __put_user(regs->lo, &sc->sc_mdlo);
- if (cpu_has_dsp) {
- err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
- err |= __put_user(mfhi1(), &sc->sc_hi1);
- err |= __put_user(mflo1(), &sc->sc_lo1);
- err |= __put_user(mfhi2(), &sc->sc_hi2);
- err |= __put_user(mflo2(), &sc->sc_lo2);
- err |= __put_user(mfhi3(), &sc->sc_hi3);
- err |= __put_user(mflo3(), &sc->sc_lo3);
- }
-
- /*
- * Save FPU state to signal context. Signal handler
- * will "inherit" current FPU state.
- */
- err |= protected_save_fp_context(sc);
-
- return err;
-}
-
-static int restore_sigcontext32(struct pt_regs *regs,
- struct sigcontext32 __user *sc)
-{
- int err = 0;
- s32 treg;
- int i;
-
- /* Always make any pending restarted system calls return -EINTR */
- current->restart_block.fn = do_no_restart_syscall;
-
- err |= __get_user(regs->cp0_epc, &sc->sc_pc);
- err |= __get_user(regs->hi, &sc->sc_mdhi);
- err |= __get_user(regs->lo, &sc->sc_mdlo);
- if (cpu_has_dsp) {
- err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
- err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
- err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
- err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
- err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
- err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
- err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
- }
-
- for (i = 1; i < 32; i++)
- err |= __get_user(regs->regs[i], &sc->sc_regs[i]);
-
- return err ?: protected_restore_fp_context(sc);
-}
-
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
@@ -247,176 +144,3 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
return 0;
}
-
-asmlinkage void sys32_sigreturn(nabi_no_regargs struct pt_regs regs)
-{
- struct sigframe32 __user *frame;
- sigset_t blocked;
- int sig;
-
- frame = (struct sigframe32 __user *) regs.regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_conv_sigset_from_user(&blocked, &frame->sf_mask))
- goto badframe;
-
- set_current_blocked(&blocked);
-
- sig = restore_sigcontext32(&regs, &frame->sf_sc);
- if (sig < 0)
- goto badframe;
- else if (sig)
- force_sig(sig, current);
-
- /*
- * Don't let your children do this ...
- */
- __asm__ __volatile__(
- "move\t$29, %0\n\t"
- "j\tsyscall_exit"
- :/* no outputs */
- :"r" (&regs));
- /* Unreached */
-
-badframe:
- force_sig(SIGSEGV, current);
-}
-
-asmlinkage void sys32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
-{
- struct rt_sigframe32 __user *frame;
- sigset_t set;
- int sig;
-
- frame = (struct rt_sigframe32 __user *) regs.regs[29];
- if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
- goto badframe;
- if (__copy_conv_sigset_from_user(&set, &frame->rs_uc.uc_sigmask))
- goto badframe;
-
- set_current_blocked(&set);
-
- sig = restore_sigcontext32(&regs, &frame->rs_uc.uc_mcontext);
- if (sig < 0)
- goto badframe;
- else if (sig)
- force_sig(sig, current);
-
- if (compat_restore_altstack(&frame->rs_uc.uc_stack))
- goto badframe;
-
- /*
- * Don't let your children do this ...
- */
- __asm__ __volatile__(
- "move\t$29, %0\n\t"
- "j\tsyscall_exit"
- :/* no outputs */
- :"r" (&regs));
- /* Unreached */
-
-badframe:
- force_sig(SIGSEGV, current);
-}
-
-static int setup_frame_32(void *sig_return, struct ksignal *ksig,
- struct pt_regs *regs, sigset_t *set)
-{
- struct sigframe32 __user *frame;
- int err = 0;
-
- frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
- return -EFAULT;
-
- err |= setup_sigcontext32(regs, &frame->sf_sc);
- err |= __copy_conv_sigset_to_user(&frame->sf_mask, set);
-
- if (err)
- return -EFAULT;
-
- /*
- * Arguments to signal handler:
- *
- * a0 = signal number
- * a1 = 0 (should be cause)
- * a2 = pointer to struct sigcontext
- *
- * $25 and c0_epc point to the signal handler, $29 points to the
- * struct sigframe.
- */
- regs->regs[ 4] = ksig->sig;
- regs->regs[ 5] = 0;
- regs->regs[ 6] = (unsigned long) &frame->sf_sc;
- regs->regs[29] = (unsigned long) frame;
- regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
-
- DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
- current->comm, current->pid,
- frame, regs->cp0_epc, regs->regs[31]);
-
- return 0;
-}
-
-static int setup_rt_frame_32(void *sig_return, struct ksignal *ksig,
- struct pt_regs *regs, sigset_t *set)
-{
- struct rt_sigframe32 __user *frame;
- int err = 0;
-
- frame = get_sigframe(ksig, regs, sizeof(*frame));
- if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
- return -EFAULT;
-
- /* Convert (siginfo_t -> compat_siginfo_t) and copy to user. */
- err |= copy_siginfo_to_user32(&frame->rs_info, &ksig->info);
-
- /* Create the ucontext. */
- err |= __put_user(0, &frame->rs_uc.uc_flags);
- err |= __put_user(0, &frame->rs_uc.uc_link);
- err |= __compat_save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]);
- err |= setup_sigcontext32(regs, &frame->rs_uc.uc_mcontext);
- err |= __copy_conv_sigset_to_user(&frame->rs_uc.uc_sigmask, set);
-
- if (err)
- return -EFAULT;
-
- /*
- * Arguments to signal handler:
- *
- * a0 = signal number
- * a1 = 0 (should be cause)
- * a2 = pointer to ucontext
- *
- * $25 and c0_epc point to the signal handler, $29 points to
- * the struct rt_sigframe32.
- */
- regs->regs[ 4] = ksig->sig;
- regs->regs[ 5] = (unsigned long) &frame->rs_info;
- regs->regs[ 6] = (unsigned long) &frame->rs_uc;
- regs->regs[29] = (unsigned long) frame;
- regs->regs[31] = (unsigned long) sig_return;
- regs->cp0_epc = regs->regs[25] = (unsigned long) ksig->ka.sa.sa_handler;
-
- DEBUGP("SIG deliver (%s:%d): sp=0x%p pc=0x%lx ra=0x%lx\n",
- current->comm, current->pid,
- frame, regs->cp0_epc, regs->regs[31]);
-
- return 0;
-}
-
-/*
- * o32 compatibility on 64-bit kernels, without DSP ASE
- */
-struct mips_abi mips_abi_32 = {
- .setup_frame = setup_frame_32,
- .setup_rt_frame = setup_rt_frame_32,
- .restart = __NR_O32_restart_syscall,
-
- .off_sc_fpregs = offsetof(struct sigcontext32, sc_fpregs),
- .off_sc_fpc_csr = offsetof(struct sigcontext32, sc_fpc_csr),
- .off_sc_used_math = offsetof(struct sigcontext32, sc_used_math),
-
- .vdso = &vdso_image_o32,
-};
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