Fedora kernel-2.6.17-1.2142_FC4 patched with stable patch-2.6.17.4-vs2.0.2-rc26.diff

[linux-2.6.git] / arch / mips / kernel / signal-common.h

diff --git a/arch/mips/kernel/signal-common.h b/arch/mips/kernel/signal-common.h
index f9234df..ce6cb91 100644 (file)
--- a/arch/mips/kernel/signal-common.h
+++ b/arch/mips/kernel/signal-common.h
@@ -8,13 +8,14 @@
  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
  */
 
+#include <linux/config.h>
+
 static inline int
-setup_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
        int err = 0;
 
        err |= __put_user(regs->cp0_epc, &sc->sc_pc);
-       err |= __put_user(regs->cp0_status, &sc->sc_status);
 
 #define save_gp_reg(i) do {                                            \
        err |= __put_user(regs->regs[i], &sc->sc_regs[i]);              \
@@ -32,8 +33,15 @@ setup_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
 
        err |= __put_user(regs->hi, &sc->sc_mdhi);
        err |= __put_user(regs->lo, &sc->sc_mdlo);
-       err |= __put_user(regs->cp0_cause, &sc->sc_cause);
-       err |= __put_user(regs->cp0_badvaddr, &sc->sc_badvaddr);
+       if (cpu_has_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);
+               err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
+       }
 
        err |= __put_user(!!used_math(), &sc->sc_used_math);
 
@@ -59,10 +67,11 @@ out:
 }
 
 static inline int
-restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
+restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 {
-       int err = 0;
        unsigned int used_math;
+       unsigned long treg;
+       int err = 0;
 
        /* Always make any pending restarted system calls return -EINTR */
        current_thread_info()->restart_block.fn = do_no_restart_syscall;
@@ -70,6 +79,15 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
        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);
+       }
 
 #define restore_gp_reg(i) do {                                         \
        err |= __get_user(regs->regs[i], &sc->sc_regs[i]);              \
@@ -109,29 +127,51 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
 /*
  * Determine which stack to use..
  */
-static inline void *
+static inline void __user *
 get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
 {
-       unsigned long sp, almask;
+       unsigned long sp;
 
        /* Default to using normal stack */
        sp = regs->regs[29];
 
        /*
-        * FPU emulator may have it's own trampoline active just
-        * above the user stack, 16-bytes before the next lowest
-        * 16 byte boundary.  Try to avoid trashing it.
-        */
-       sp -= 32;
+        * FPU emulator may have it's own trampoline active just
+        * above the user stack, 16-bytes before the next lowest
+        * 16 byte boundary.  Try to avoid trashing it.
+        */
+       sp -= 32;
 
        /* This is the X/Open sanctioned signal stack switching.  */
        if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
                sp = current->sas_ss_sp + current->sas_ss_size;
 
-       if (PLAT_TRAMPOLINE_STUFF_LINE)
-               almask = ~(PLAT_TRAMPOLINE_STUFF_LINE - 1);
-       else
-               almask = ALMASK;
+       return (void __user *)((sp - frame_size) & (ICACHE_REFILLS_WORKAROUND_WAR ? ~(cpu_icache_line_size()-1) : ALMASK));
+}
 
-       return (void *)((sp - frame_size) & almask);
+static inline int install_sigtramp(unsigned int __user *tramp,
+       unsigned int syscall)
+{
+       int err;
+
+       /*
+        * Set up the return code ...
+        *
+        *         li      v0, __NR__foo_sigreturn
+        *         syscall
+        */
+
+       err = __put_user(0x24020000 + syscall, tramp + 0);
+       err |= __put_user(0x0000000c          , tramp + 1);
+       if (ICACHE_REFILLS_WORKAROUND_WAR) {
+               err |= __put_user(0, tramp + 2);
+               err |= __put_user(0, tramp + 3);
+               err |= __put_user(0, tramp + 4);
+               err |= __put_user(0, tramp + 5);
+               err |= __put_user(0, tramp + 6);
+               err |= __put_user(0, tramp + 7);
+       }
+       flush_cache_sigtramp((unsigned long) tramp);
+
+       return err;
 }