1618
1622
return -ENOSYS;
1625
#elif defined(TARGET_MIPS)
1627
struct target_sigcontext {
1628
uint32_t sc_regmask; /* Unused */
1631
uint64_t sc_regs[32];
1632
uint64_t sc_fpregs[32];
1633
uint32_t sc_ownedfp; /* Unused */
1634
uint32_t sc_fpc_csr;
1635
uint32_t sc_fpc_eir; /* Unused */
1636
uint32_t sc_used_math;
1637
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
1640
target_ulong sc_hi1; /* Was sc_cause */
1641
target_ulong sc_lo1; /* Was sc_badvaddr */
1642
target_ulong sc_hi2; /* Was sc_sigset[4] */
1643
target_ulong sc_lo2;
1644
target_ulong sc_hi3;
1645
target_ulong sc_lo3;
1649
uint32_t sf_ass[4]; /* argument save space for o32 */
1650
uint32_t sf_code[2]; /* signal trampoline */
1651
struct target_sigcontext sf_sc;
1652
target_sigset_t sf_mask;
1655
/* Install trampoline to jump back from signal handler */
1656
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
1661
* Set up the return code ...
1663
* li v0, __NR__foo_sigreturn
1667
err = __put_user(0x24020000 + syscall, tramp + 0);
1668
err |= __put_user(0x0000000c , tramp + 1);
1669
/* flush_cache_sigtramp((unsigned long) tramp); */
1674
setup_sigcontext(CPUState *regs, struct target_sigcontext *sc)
1678
err |= __put_user(regs->PC, &sc->sc_pc);
1680
#define save_gp_reg(i) do { \
1681
err |= __put_user(regs->gpr[i], &sc->sc_regs[i]); \
1683
__put_user(0, &sc->sc_regs[0]); save_gp_reg(1); save_gp_reg(2);
1684
save_gp_reg(3); save_gp_reg(4); save_gp_reg(5); save_gp_reg(6);
1685
save_gp_reg(7); save_gp_reg(8); save_gp_reg(9); save_gp_reg(10);
1686
save_gp_reg(11); save_gp_reg(12); save_gp_reg(13); save_gp_reg(14);
1687
save_gp_reg(15); save_gp_reg(16); save_gp_reg(17); save_gp_reg(18);
1688
save_gp_reg(19); save_gp_reg(20); save_gp_reg(21); save_gp_reg(22);
1689
save_gp_reg(23); save_gp_reg(24); save_gp_reg(25); save_gp_reg(26);
1690
save_gp_reg(27); save_gp_reg(28); save_gp_reg(29); save_gp_reg(30);
1694
err |= __put_user(regs->HI, &sc->sc_mdhi);
1695
err |= __put_user(regs->LO, &sc->sc_mdlo);
1697
/* Not used yet, but might be useful if we ever have DSP suppport */
1700
err |= __put_user(mfhi1(), &sc->sc_hi1);
1701
err |= __put_user(mflo1(), &sc->sc_lo1);
1702
err |= __put_user(mfhi2(), &sc->sc_hi2);
1703
err |= __put_user(mflo2(), &sc->sc_lo2);
1704
err |= __put_user(mfhi3(), &sc->sc_hi3);
1705
err |= __put_user(mflo3(), &sc->sc_lo3);
1706
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
1708
/* same with 64 bit */
1710
err |= __put_user(regs->hi, &sc->sc_hi[0]);
1711
err |= __put_user(regs->lo, &sc->sc_lo[0]);
1713
err |= __put_user(mfhi1(), &sc->sc_hi[1]);
1714
err |= __put_user(mflo1(), &sc->sc_lo[1]);
1715
err |= __put_user(mfhi2(), &sc->sc_hi[2]);
1716
err |= __put_user(mflo2(), &sc->sc_lo[2]);
1717
err |= __put_user(mfhi3(), &sc->sc_hi[3]);
1718
err |= __put_user(mflo3(), &sc->sc_lo[3]);
1719
err |= __put_user(rddsp(DSP_MASK), &sc->sc_dsp);
1728
err |= __put_user(!!used_math(), &sc->sc_used_math);
1734
* Save FPU state to signal context. Signal handler will "inherit"
1735
* current FPU state.
1739
if (!is_fpu_owner()) {
1741
restore_fp(current);
1743
err |= save_fp_context(sc);
1752
restore_sigcontext(CPUState *regs, struct target_sigcontext *sc)
1756
err |= __get_user(regs->CP0_EPC, &sc->sc_pc);
1758
err |= __get_user(regs->HI, &sc->sc_mdhi);
1759
err |= __get_user(regs->LO, &sc->sc_mdlo);
1761
#define restore_gp_reg(i) do { \
1762
err |= __get_user(regs->gpr[i], &sc->sc_regs[i]); \
1764
restore_gp_reg( 1); restore_gp_reg( 2); restore_gp_reg( 3);
1765
restore_gp_reg( 4); restore_gp_reg( 5); restore_gp_reg( 6);
1766
restore_gp_reg( 7); restore_gp_reg( 8); restore_gp_reg( 9);
1767
restore_gp_reg(10); restore_gp_reg(11); restore_gp_reg(12);
1768
restore_gp_reg(13); restore_gp_reg(14); restore_gp_reg(15);
1769
restore_gp_reg(16); restore_gp_reg(17); restore_gp_reg(18);
1770
restore_gp_reg(19); restore_gp_reg(20); restore_gp_reg(21);
1771
restore_gp_reg(22); restore_gp_reg(23); restore_gp_reg(24);
1772
restore_gp_reg(25); restore_gp_reg(26); restore_gp_reg(27);
1773
restore_gp_reg(28); restore_gp_reg(29); restore_gp_reg(30);
1775
#undef restore_gp_reg
1779
err |= __get_user(treg, &sc->sc_hi1); mthi1(treg);
1780
err |= __get_user(treg, &sc->sc_lo1); mtlo1(treg);
1781
err |= __get_user(treg, &sc->sc_hi2); mthi2(treg);
1782
err |= __get_user(treg, &sc->sc_lo2); mtlo2(treg);
1783
err |= __get_user(treg, &sc->sc_hi3); mthi3(treg);
1784
err |= __get_user(treg, &sc->sc_lo3); mtlo3(treg);
1785
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
1788
err |= __get_user(regs->hi, &sc->sc_hi[0]);
1789
err |= __get_user(regs->lo, &sc->sc_lo[0]);
1791
err |= __get_user(treg, &sc->sc_hi[1]); mthi1(treg);
1792
err |= __get_user(treg, &sc->sc_lo[1]); mthi1(treg);
1793
err |= __get_user(treg, &sc->sc_hi[2]); mthi2(treg);
1794
err |= __get_user(treg, &sc->sc_lo[2]); mthi2(treg);
1795
err |= __get_user(treg, &sc->sc_hi[3]); mthi3(treg);
1796
err |= __get_user(treg, &sc->sc_lo[3]); mthi3(treg);
1797
err |= __get_user(treg, &sc->sc_dsp); wrdsp(treg, DSP_MASK);
1801
err |= __get_user(used_math, &sc->sc_used_math);
1802
conditional_used_math(used_math);
1807
/* restore fpu context if we have used it before */
1809
err |= restore_fp_context(sc);
1811
/* signal handler may have used FPU. Give it up. */
1820
* Determine which stack to use..
1822
static inline void *
1823
get_sigframe(struct emulated_sigaction *ka, CPUState *regs, size_t frame_size)
1827
/* Default to using normal stack */
1831
* FPU emulator may have it's own trampoline active just
1832
* above the user stack, 16-bytes before the next lowest
1833
* 16 byte boundary. Try to avoid trashing it.
1838
/* This is the X/Open sanctioned signal stack switching. */
1839
if ((ka->sa.sa_flags & SA_ONSTACK) && (sas_ss_flags (sp) == 0))
1840
sp = current->sas_ss_sp + current->sas_ss_size;
1843
return g2h((sp - frame_size) & ~7);
1846
static void setup_frame(int sig, struct emulated_sigaction * ka,
1847
target_sigset_t *set, CPUState *regs)
1849
struct sigframe *frame;
1852
frame = get_sigframe(ka, regs, sizeof(*frame));
1853
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
1856
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
1858
if(setup_sigcontext(regs, &frame->sf_sc))
1861
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1862
if(__put_user(set->sig[i], &frame->sf_mask.sig[i]))
1867
* Arguments to signal handler:
1869
* a0 = signal number
1870
* a1 = 0 (should be cause)
1871
* a2 = pointer to struct sigcontext
1873
* $25 and PC point to the signal handler, $29 points to the
1876
regs->gpr[ 4] = sig;
1878
regs->gpr[ 6] = h2g(&frame->sf_sc);
1879
regs->gpr[29] = h2g(frame);
1880
regs->gpr[31] = h2g(frame->sf_code);
1881
/* The original kernel code sets CP0_EPC to the handler
1882
* since it returns to userland using eret
1883
* we cannot do this here, and we must set PC directly */
1884
regs->PC = regs->gpr[25] = ka->sa._sa_handler;
1888
force_sig(TARGET_SIGSEGV/*, current*/);
1892
long do_sigreturn(CPUState *regs)
1894
struct sigframe *frame;
1896
target_sigset_t target_set;
1899
#if defined(DEBUG_SIGNAL)
1900
fprintf(stderr, "do_sigreturn\n");
1902
frame = (struct sigframe *) regs->gpr[29];
1903
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
1906
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
1907
if(__get_user(target_set.sig[i], &frame->sf_mask.sig[i]))
1911
target_to_host_sigset_internal(&blocked, &target_set);
1912
sigprocmask(SIG_SETMASK, &blocked, NULL);
1914
if (restore_sigcontext(regs, &frame->sf_sc))
1919
* Don't let your children do this ...
1921
__asm__ __volatile__(
1929
regs->PC = regs->CP0_EPC;
1930
/* I am not sure this is right, but it seems to work
1931
* maybe a problem with nested signals ? */
1936
force_sig(TARGET_SIGSEGV/*, current*/);
1941
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
1942
target_siginfo_t *info,
1943
target_sigset_t *set, CPUState *env)
1945
fprintf(stderr, "setup_rt_frame: not implemented\n");
1948
long do_rt_sigreturn(CPUState *env)
1950
fprintf(stderr, "do_rt_sigreturn: not implemented\n");