linux-user: move mips/mips64 signal.c parts to mips directory
No code change, only move code from signal.c to mips/signal.c, except adding includes and exporting setup_frame() and setup_rt_frame(). mips64/signal.c includes mips/signal.c Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20180424192635.6027-19-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier
parent
9f172adb35
commit
8949bef18b
@ -16,3 +16,385 @@
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu.h"
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#include "target_signal.h"
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#include "signal-common.h"
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#include "linux-user/trace.h"
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# if defined(TARGET_ABI_MIPSO32)
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struct target_sigcontext {
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uint32_t sc_regmask; /* Unused */
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uint32_t sc_status;
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uint64_t sc_pc;
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uint64_t sc_regs[32];
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uint64_t sc_fpregs[32];
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uint32_t sc_ownedfp; /* Unused */
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uint32_t sc_fpc_csr;
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uint32_t sc_fpc_eir; /* Unused */
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uint32_t sc_used_math;
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uint32_t sc_dsp; /* dsp status, was sc_ssflags */
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uint32_t pad0;
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uint64_t sc_mdhi;
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uint64_t sc_mdlo;
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target_ulong sc_hi1; /* Was sc_cause */
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target_ulong sc_lo1; /* Was sc_badvaddr */
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target_ulong sc_hi2; /* Was sc_sigset[4] */
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target_ulong sc_lo2;
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target_ulong sc_hi3;
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target_ulong sc_lo3;
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};
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# else /* N32 || N64 */
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struct target_sigcontext {
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uint64_t sc_regs[32];
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uint64_t sc_fpregs[32];
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uint64_t sc_mdhi;
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uint64_t sc_hi1;
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uint64_t sc_hi2;
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uint64_t sc_hi3;
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uint64_t sc_mdlo;
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uint64_t sc_lo1;
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uint64_t sc_lo2;
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uint64_t sc_lo3;
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uint64_t sc_pc;
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uint32_t sc_fpc_csr;
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uint32_t sc_used_math;
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uint32_t sc_dsp;
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uint32_t sc_reserved;
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};
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# endif /* O32 */
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struct sigframe {
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uint32_t sf_ass[4]; /* argument save space for o32 */
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uint32_t sf_code[2]; /* signal trampoline */
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struct target_sigcontext sf_sc;
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target_sigset_t sf_mask;
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};
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struct target_ucontext {
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target_ulong tuc_flags;
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target_ulong tuc_link;
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target_stack_t tuc_stack;
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target_ulong pad0;
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask;
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};
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struct target_rt_sigframe {
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uint32_t rs_ass[4]; /* argument save space for o32 */
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uint32_t rs_code[2]; /* signal trampoline */
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struct target_siginfo rs_info;
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struct target_ucontext rs_uc;
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};
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/* Install trampoline to jump back from signal handler */
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static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
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{
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int err = 0;
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/*
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* Set up the return code ...
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*
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* li v0, __NR__foo_sigreturn
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* syscall
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*/
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__put_user(0x24020000 + syscall, tramp + 0);
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__put_user(0x0000000c , tramp + 1);
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return err;
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}
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static inline void setup_sigcontext(CPUMIPSState *regs,
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struct target_sigcontext *sc)
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{
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int i;
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__put_user(exception_resume_pc(regs), &sc->sc_pc);
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regs->hflags &= ~MIPS_HFLAG_BMASK;
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__put_user(0, &sc->sc_regs[0]);
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for (i = 1; i < 32; ++i) {
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__put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
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}
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__put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
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__put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
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/* Rather than checking for dsp existence, always copy. The storage
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would just be garbage otherwise. */
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__put_user(regs->active_tc.HI[1], &sc->sc_hi1);
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__put_user(regs->active_tc.HI[2], &sc->sc_hi2);
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__put_user(regs->active_tc.HI[3], &sc->sc_hi3);
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__put_user(regs->active_tc.LO[1], &sc->sc_lo1);
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__put_user(regs->active_tc.LO[2], &sc->sc_lo2);
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__put_user(regs->active_tc.LO[3], &sc->sc_lo3);
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{
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uint32_t dsp = cpu_rddsp(0x3ff, regs);
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__put_user(dsp, &sc->sc_dsp);
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}
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__put_user(1, &sc->sc_used_math);
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for (i = 0; i < 32; ++i) {
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__put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
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}
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}
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static inline void
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restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
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{
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int i;
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__get_user(regs->CP0_EPC, &sc->sc_pc);
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__get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
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__get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
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for (i = 1; i < 32; ++i) {
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__get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
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}
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__get_user(regs->active_tc.HI[1], &sc->sc_hi1);
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__get_user(regs->active_tc.HI[2], &sc->sc_hi2);
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__get_user(regs->active_tc.HI[3], &sc->sc_hi3);
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__get_user(regs->active_tc.LO[1], &sc->sc_lo1);
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__get_user(regs->active_tc.LO[2], &sc->sc_lo2);
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__get_user(regs->active_tc.LO[3], &sc->sc_lo3);
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{
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uint32_t dsp;
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__get_user(dsp, &sc->sc_dsp);
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cpu_wrdsp(dsp, 0x3ff, regs);
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}
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for (i = 0; i < 32; ++i) {
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__get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
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}
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}
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/*
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* Determine which stack to use..
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*/
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static inline abi_ulong
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get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
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{
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unsigned long sp;
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/* Default to using normal stack */
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sp = regs->active_tc.gpr[29];
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/*
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* FPU emulator may have its own trampoline active just
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* above the user stack, 16-bytes before the next lowest
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* 16 byte boundary. Try to avoid trashing it.
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*/
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sp -= 32;
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/* This is the X/Open sanctioned signal stack switching. */
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if ((ka->sa_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
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sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
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}
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return (sp - frame_size) & ~7;
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}
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static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
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{
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if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
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env->hflags &= ~MIPS_HFLAG_M16;
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env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
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env->active_tc.PC &= ~(target_ulong) 1;
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}
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}
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# if defined(TARGET_ABI_MIPSO32)
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/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
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void setup_frame(int sig, struct target_sigaction * ka,
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target_sigset_t *set, CPUMIPSState *regs)
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{
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struct sigframe *frame;
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abi_ulong frame_addr;
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int i;
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frame_addr = get_sigframe(ka, regs, sizeof(*frame));
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trace_user_setup_frame(regs, frame_addr);
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if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
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goto give_sigsegv;
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}
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install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
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setup_sigcontext(regs, &frame->sf_sc);
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for(i = 0; i < TARGET_NSIG_WORDS; i++) {
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__put_user(set->sig[i], &frame->sf_mask.sig[i]);
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}
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/*
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* Arguments to signal handler:
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*
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* a0 = signal number
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* a1 = 0 (should be cause)
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* a2 = pointer to struct sigcontext
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*
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* $25 and PC point to the signal handler, $29 points to the
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* struct sigframe.
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*/
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regs->active_tc.gpr[ 4] = sig;
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regs->active_tc.gpr[ 5] = 0;
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regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
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regs->active_tc.gpr[29] = frame_addr;
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regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
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/* The original kernel code sets CP0_EPC to the handler
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* since it returns to userland using eret
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* we cannot do this here, and we must set PC directly */
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regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
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mips_set_hflags_isa_mode_from_pc(regs);
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unlock_user_struct(frame, frame_addr, 1);
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return;
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give_sigsegv:
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force_sigsegv(sig);
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}
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long do_sigreturn(CPUMIPSState *regs)
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{
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struct sigframe *frame;
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abi_ulong frame_addr;
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sigset_t blocked;
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target_sigset_t target_set;
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int i;
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frame_addr = regs->active_tc.gpr[29];
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trace_user_do_sigreturn(regs, frame_addr);
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if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
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goto badframe;
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for(i = 0; i < TARGET_NSIG_WORDS; i++) {
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__get_user(target_set.sig[i], &frame->sf_mask.sig[i]);
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}
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target_to_host_sigset_internal(&blocked, &target_set);
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set_sigmask(&blocked);
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restore_sigcontext(regs, &frame->sf_sc);
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#if 0
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/*
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* Don't let your children do this ...
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*/
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__asm__ __volatile__(
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"move\t$29, %0\n\t"
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"j\tsyscall_exit"
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:/* no outputs */
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:"r" (®s));
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/* Unreached */
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#endif
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regs->active_tc.PC = regs->CP0_EPC;
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mips_set_hflags_isa_mode_from_pc(regs);
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/* I am not sure this is right, but it seems to work
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* maybe a problem with nested signals ? */
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regs->CP0_EPC = 0;
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return -TARGET_QEMU_ESIGRETURN;
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badframe:
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force_sig(TARGET_SIGSEGV);
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return -TARGET_QEMU_ESIGRETURN;
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}
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# endif /* O32 */
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void setup_rt_frame(int sig, struct target_sigaction *ka,
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target_siginfo_t *info,
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target_sigset_t *set, CPUMIPSState *env)
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{
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struct target_rt_sigframe *frame;
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abi_ulong frame_addr;
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int i;
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frame_addr = get_sigframe(ka, env, sizeof(*frame));
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trace_user_setup_rt_frame(env, frame_addr);
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if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
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goto give_sigsegv;
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}
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install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
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tswap_siginfo(&frame->rs_info, info);
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__put_user(0, &frame->rs_uc.tuc_flags);
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__put_user(0, &frame->rs_uc.tuc_link);
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__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
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__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
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__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
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&frame->rs_uc.tuc_stack.ss_flags);
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setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
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for(i = 0; i < TARGET_NSIG_WORDS; i++) {
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__put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
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}
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/*
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* Arguments to signal handler:
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*
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* a0 = signal number
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* a1 = pointer to siginfo_t
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* a2 = pointer to ucontext_t
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*
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* $25 and PC point to the signal handler, $29 points to the
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* struct sigframe.
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*/
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env->active_tc.gpr[ 4] = sig;
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env->active_tc.gpr[ 5] = frame_addr
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+ offsetof(struct target_rt_sigframe, rs_info);
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env->active_tc.gpr[ 6] = frame_addr
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+ offsetof(struct target_rt_sigframe, rs_uc);
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env->active_tc.gpr[29] = frame_addr;
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env->active_tc.gpr[31] = frame_addr
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+ offsetof(struct target_rt_sigframe, rs_code);
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/* The original kernel code sets CP0_EPC to the handler
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* since it returns to userland using eret
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* we cannot do this here, and we must set PC directly */
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env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
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mips_set_hflags_isa_mode_from_pc(env);
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unlock_user_struct(frame, frame_addr, 1);
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return;
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give_sigsegv:
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unlock_user_struct(frame, frame_addr, 1);
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force_sigsegv(sig);
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}
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long do_rt_sigreturn(CPUMIPSState *env)
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{
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struct target_rt_sigframe *frame;
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abi_ulong frame_addr;
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sigset_t blocked;
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frame_addr = env->active_tc.gpr[29];
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trace_user_do_rt_sigreturn(env, frame_addr);
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if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
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goto badframe;
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}
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target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
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set_sigmask(&blocked);
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restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
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if (do_sigaltstack(frame_addr +
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offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
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0, get_sp_from_cpustate(env)) == -EFAULT)
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goto badframe;
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env->active_tc.PC = env->CP0_EPC;
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mips_set_hflags_isa_mode_from_pc(env);
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/* I am not sure this is right, but it seems to work
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* maybe a problem with nested signals ? */
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env->CP0_EPC = 0;
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return -TARGET_QEMU_ESIGRETURN;
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badframe:
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force_sig(TARGET_SIGSEGV);
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return -TARGET_QEMU_ESIGRETURN;
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}
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@ -26,5 +26,12 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
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return state->active_tc.gpr[29];
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}
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# if defined(TARGET_ABI_MIPSO32)
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/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
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void setup_frame(int sig, struct target_sigaction * ka,
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target_sigset_t *set, CPUMIPSState *regs);
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#endif
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void setup_rt_frame(int sig, struct target_sigaction *ka,
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target_siginfo_t *info,
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target_sigset_t *set, CPUMIPSState *env);
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#endif /* MIPS_TARGET_SIGNAL_H */
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@ -16,3 +16,5 @@
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* You should have received a copy of the GNU General Public License
|
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#define MIPS_TARGET_SIGNAL_H /* to only include mips64/target_signal.h */
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#include "../mips/signal.c"
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@ -26,5 +26,7 @@ static inline abi_ulong get_sp_from_cpustate(CPUMIPSState *state)
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return state->active_tc.gpr[29];
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}
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void setup_rt_frame(int sig, struct target_sigaction *ka,
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target_siginfo_t *info,
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target_sigset_t *set, CPUMIPSState *env);
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#endif /* MIPS64_TARGET_SIGNAL_H */
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@ -803,386 +803,7 @@ int do_sigaction(int sig, const struct target_sigaction *act,
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return ret;
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}
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#if defined(TARGET_MIPS) || defined(TARGET_MIPS64)
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# if defined(TARGET_ABI_MIPSO32)
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struct target_sigcontext {
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uint32_t sc_regmask; /* Unused */
|
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uint32_t sc_status;
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uint64_t sc_pc;
|
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uint64_t sc_regs[32];
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uint64_t sc_fpregs[32];
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uint32_t sc_ownedfp; /* Unused */
|
||||
uint32_t sc_fpc_csr;
|
||||
uint32_t sc_fpc_eir; /* Unused */
|
||||
uint32_t sc_used_math;
|
||||
uint32_t sc_dsp; /* dsp status, was sc_ssflags */
|
||||
uint32_t pad0;
|
||||
uint64_t sc_mdhi;
|
||||
uint64_t sc_mdlo;
|
||||
target_ulong sc_hi1; /* Was sc_cause */
|
||||
target_ulong sc_lo1; /* Was sc_badvaddr */
|
||||
target_ulong sc_hi2; /* Was sc_sigset[4] */
|
||||
target_ulong sc_lo2;
|
||||
target_ulong sc_hi3;
|
||||
target_ulong sc_lo3;
|
||||
};
|
||||
# else /* N32 || N64 */
|
||||
struct target_sigcontext {
|
||||
uint64_t sc_regs[32];
|
||||
uint64_t sc_fpregs[32];
|
||||
uint64_t sc_mdhi;
|
||||
uint64_t sc_hi1;
|
||||
uint64_t sc_hi2;
|
||||
uint64_t sc_hi3;
|
||||
uint64_t sc_mdlo;
|
||||
uint64_t sc_lo1;
|
||||
uint64_t sc_lo2;
|
||||
uint64_t sc_lo3;
|
||||
uint64_t sc_pc;
|
||||
uint32_t sc_fpc_csr;
|
||||
uint32_t sc_used_math;
|
||||
uint32_t sc_dsp;
|
||||
uint32_t sc_reserved;
|
||||
};
|
||||
# endif /* O32 */
|
||||
|
||||
struct sigframe {
|
||||
uint32_t sf_ass[4]; /* argument save space for o32 */
|
||||
uint32_t sf_code[2]; /* signal trampoline */
|
||||
struct target_sigcontext sf_sc;
|
||||
target_sigset_t sf_mask;
|
||||
};
|
||||
|
||||
struct target_ucontext {
|
||||
target_ulong tuc_flags;
|
||||
target_ulong tuc_link;
|
||||
target_stack_t tuc_stack;
|
||||
target_ulong pad0;
|
||||
struct target_sigcontext tuc_mcontext;
|
||||
target_sigset_t tuc_sigmask;
|
||||
};
|
||||
|
||||
struct target_rt_sigframe {
|
||||
uint32_t rs_ass[4]; /* argument save space for o32 */
|
||||
uint32_t rs_code[2]; /* signal trampoline */
|
||||
struct target_siginfo rs_info;
|
||||
struct target_ucontext rs_uc;
|
||||
};
|
||||
|
||||
/* Install trampoline to jump back from signal handler */
|
||||
static inline int install_sigtramp(unsigned int *tramp, unsigned int syscall)
|
||||
{
|
||||
int err = 0;
|
||||
|
||||
/*
|
||||
* Set up the return code ...
|
||||
*
|
||||
* li v0, __NR__foo_sigreturn
|
||||
* syscall
|
||||
*/
|
||||
|
||||
__put_user(0x24020000 + syscall, tramp + 0);
|
||||
__put_user(0x0000000c , tramp + 1);
|
||||
return err;
|
||||
}
|
||||
|
||||
static inline void setup_sigcontext(CPUMIPSState *regs,
|
||||
struct target_sigcontext *sc)
|
||||
{
|
||||
int i;
|
||||
|
||||
__put_user(exception_resume_pc(regs), &sc->sc_pc);
|
||||
regs->hflags &= ~MIPS_HFLAG_BMASK;
|
||||
|
||||
__put_user(0, &sc->sc_regs[0]);
|
||||
for (i = 1; i < 32; ++i) {
|
||||
__put_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
|
||||
}
|
||||
|
||||
__put_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
||||
__put_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
||||
|
||||
/* Rather than checking for dsp existence, always copy. The storage
|
||||
would just be garbage otherwise. */
|
||||
__put_user(regs->active_tc.HI[1], &sc->sc_hi1);
|
||||
__put_user(regs->active_tc.HI[2], &sc->sc_hi2);
|
||||
__put_user(regs->active_tc.HI[3], &sc->sc_hi3);
|
||||
__put_user(regs->active_tc.LO[1], &sc->sc_lo1);
|
||||
__put_user(regs->active_tc.LO[2], &sc->sc_lo2);
|
||||
__put_user(regs->active_tc.LO[3], &sc->sc_lo3);
|
||||
{
|
||||
uint32_t dsp = cpu_rddsp(0x3ff, regs);
|
||||
__put_user(dsp, &sc->sc_dsp);
|
||||
}
|
||||
|
||||
__put_user(1, &sc->sc_used_math);
|
||||
|
||||
for (i = 0; i < 32; ++i) {
|
||||
__put_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
|
||||
}
|
||||
}
|
||||
|
||||
static inline void
|
||||
restore_sigcontext(CPUMIPSState *regs, struct target_sigcontext *sc)
|
||||
{
|
||||
int i;
|
||||
|
||||
__get_user(regs->CP0_EPC, &sc->sc_pc);
|
||||
|
||||
__get_user(regs->active_tc.HI[0], &sc->sc_mdhi);
|
||||
__get_user(regs->active_tc.LO[0], &sc->sc_mdlo);
|
||||
|
||||
for (i = 1; i < 32; ++i) {
|
||||
__get_user(regs->active_tc.gpr[i], &sc->sc_regs[i]);
|
||||
}
|
||||
|
||||
__get_user(regs->active_tc.HI[1], &sc->sc_hi1);
|
||||
__get_user(regs->active_tc.HI[2], &sc->sc_hi2);
|
||||
__get_user(regs->active_tc.HI[3], &sc->sc_hi3);
|
||||
__get_user(regs->active_tc.LO[1], &sc->sc_lo1);
|
||||
__get_user(regs->active_tc.LO[2], &sc->sc_lo2);
|
||||
__get_user(regs->active_tc.LO[3], &sc->sc_lo3);
|
||||
{
|
||||
uint32_t dsp;
|
||||
__get_user(dsp, &sc->sc_dsp);
|
||||
cpu_wrdsp(dsp, 0x3ff, regs);
|
||||
}
|
||||
|
||||
for (i = 0; i < 32; ++i) {
|
||||
__get_user(regs->active_fpu.fpr[i].d, &sc->sc_fpregs[i]);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Determine which stack to use..
|
||||
*/
|
||||
static inline abi_ulong
|
||||
get_sigframe(struct target_sigaction *ka, CPUMIPSState *regs, size_t frame_size)
|
||||
{
|
||||
unsigned long sp;
|
||||
|
||||
/* Default to using normal stack */
|
||||
sp = regs->active_tc.gpr[29];
|
||||
|
||||
/*
|
||||
* FPU emulator may have its 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_flags & TARGET_SA_ONSTACK) && (sas_ss_flags (sp) == 0)) {
|
||||
sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
|
||||
}
|
||||
|
||||
return (sp - frame_size) & ~7;
|
||||
}
|
||||
|
||||
static void mips_set_hflags_isa_mode_from_pc(CPUMIPSState *env)
|
||||
{
|
||||
if (env->insn_flags & (ASE_MIPS16 | ASE_MICROMIPS)) {
|
||||
env->hflags &= ~MIPS_HFLAG_M16;
|
||||
env->hflags |= (env->active_tc.PC & 1) << MIPS_HFLAG_M16_SHIFT;
|
||||
env->active_tc.PC &= ~(target_ulong) 1;
|
||||
}
|
||||
}
|
||||
|
||||
# if defined(TARGET_ABI_MIPSO32)
|
||||
/* compare linux/arch/mips/kernel/signal.c:setup_frame() */
|
||||
static void setup_frame(int sig, struct target_sigaction * ka,
|
||||
target_sigset_t *set, CPUMIPSState *regs)
|
||||
{
|
||||
struct sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
int i;
|
||||
|
||||
frame_addr = get_sigframe(ka, regs, sizeof(*frame));
|
||||
trace_user_setup_frame(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
|
||||
goto give_sigsegv;
|
||||
}
|
||||
|
||||
install_sigtramp(frame->sf_code, TARGET_NR_sigreturn);
|
||||
|
||||
setup_sigcontext(regs, &frame->sf_sc);
|
||||
|
||||
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
||||
__put_user(set->sig[i], &frame->sf_mask.sig[i]);
|
||||
}
|
||||
|
||||
/*
|
||||
* Arguments to signal handler:
|
||||
*
|
||||
* a0 = signal number
|
||||
* a1 = 0 (should be cause)
|
||||
* a2 = pointer to struct sigcontext
|
||||
*
|
||||
* $25 and PC point to the signal handler, $29 points to the
|
||||
* struct sigframe.
|
||||
*/
|
||||
regs->active_tc.gpr[ 4] = sig;
|
||||
regs->active_tc.gpr[ 5] = 0;
|
||||
regs->active_tc.gpr[ 6] = frame_addr + offsetof(struct sigframe, sf_sc);
|
||||
regs->active_tc.gpr[29] = frame_addr;
|
||||
regs->active_tc.gpr[31] = frame_addr + offsetof(struct sigframe, sf_code);
|
||||
/* The original kernel code sets CP0_EPC to the handler
|
||||
* since it returns to userland using eret
|
||||
* we cannot do this here, and we must set PC directly */
|
||||
regs->active_tc.PC = regs->active_tc.gpr[25] = ka->_sa_handler;
|
||||
mips_set_hflags_isa_mode_from_pc(regs);
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
return;
|
||||
|
||||
give_sigsegv:
|
||||
force_sigsegv(sig);
|
||||
}
|
||||
|
||||
long do_sigreturn(CPUMIPSState *regs)
|
||||
{
|
||||
struct sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
sigset_t blocked;
|
||||
target_sigset_t target_set;
|
||||
int i;
|
||||
|
||||
frame_addr = regs->active_tc.gpr[29];
|
||||
trace_user_do_sigreturn(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1))
|
||||
goto badframe;
|
||||
|
||||
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
||||
__get_user(target_set.sig[i], &frame->sf_mask.sig[i]);
|
||||
}
|
||||
|
||||
target_to_host_sigset_internal(&blocked, &target_set);
|
||||
set_sigmask(&blocked);
|
||||
|
||||
restore_sigcontext(regs, &frame->sf_sc);
|
||||
|
||||
#if 0
|
||||
/*
|
||||
* Don't let your children do this ...
|
||||
*/
|
||||
__asm__ __volatile__(
|
||||
"move\t$29, %0\n\t"
|
||||
"j\tsyscall_exit"
|
||||
:/* no outputs */
|
||||
:"r" (®s));
|
||||
/* Unreached */
|
||||
#endif
|
||||
|
||||
regs->active_tc.PC = regs->CP0_EPC;
|
||||
mips_set_hflags_isa_mode_from_pc(regs);
|
||||
/* I am not sure this is right, but it seems to work
|
||||
* maybe a problem with nested signals ? */
|
||||
regs->CP0_EPC = 0;
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
|
||||
badframe:
|
||||
force_sig(TARGET_SIGSEGV);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
}
|
||||
# endif /* O32 */
|
||||
|
||||
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
||||
target_siginfo_t *info,
|
||||
target_sigset_t *set, CPUMIPSState *env)
|
||||
{
|
||||
struct target_rt_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
int i;
|
||||
|
||||
frame_addr = get_sigframe(ka, env, sizeof(*frame));
|
||||
trace_user_setup_rt_frame(env, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
|
||||
goto give_sigsegv;
|
||||
}
|
||||
|
||||
install_sigtramp(frame->rs_code, TARGET_NR_rt_sigreturn);
|
||||
|
||||
tswap_siginfo(&frame->rs_info, info);
|
||||
|
||||
__put_user(0, &frame->rs_uc.tuc_flags);
|
||||
__put_user(0, &frame->rs_uc.tuc_link);
|
||||
__put_user(target_sigaltstack_used.ss_sp, &frame->rs_uc.tuc_stack.ss_sp);
|
||||
__put_user(target_sigaltstack_used.ss_size, &frame->rs_uc.tuc_stack.ss_size);
|
||||
__put_user(sas_ss_flags(get_sp_from_cpustate(env)),
|
||||
&frame->rs_uc.tuc_stack.ss_flags);
|
||||
|
||||
setup_sigcontext(env, &frame->rs_uc.tuc_mcontext);
|
||||
|
||||
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
||||
__put_user(set->sig[i], &frame->rs_uc.tuc_sigmask.sig[i]);
|
||||
}
|
||||
|
||||
/*
|
||||
* Arguments to signal handler:
|
||||
*
|
||||
* a0 = signal number
|
||||
* a1 = pointer to siginfo_t
|
||||
* a2 = pointer to ucontext_t
|
||||
*
|
||||
* $25 and PC point to the signal handler, $29 points to the
|
||||
* struct sigframe.
|
||||
*/
|
||||
env->active_tc.gpr[ 4] = sig;
|
||||
env->active_tc.gpr[ 5] = frame_addr
|
||||
+ offsetof(struct target_rt_sigframe, rs_info);
|
||||
env->active_tc.gpr[ 6] = frame_addr
|
||||
+ offsetof(struct target_rt_sigframe, rs_uc);
|
||||
env->active_tc.gpr[29] = frame_addr;
|
||||
env->active_tc.gpr[31] = frame_addr
|
||||
+ offsetof(struct target_rt_sigframe, rs_code);
|
||||
/* The original kernel code sets CP0_EPC to the handler
|
||||
* since it returns to userland using eret
|
||||
* we cannot do this here, and we must set PC directly */
|
||||
env->active_tc.PC = env->active_tc.gpr[25] = ka->_sa_handler;
|
||||
mips_set_hflags_isa_mode_from_pc(env);
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
return;
|
||||
|
||||
give_sigsegv:
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
force_sigsegv(sig);
|
||||
}
|
||||
|
||||
long do_rt_sigreturn(CPUMIPSState *env)
|
||||
{
|
||||
struct target_rt_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
sigset_t blocked;
|
||||
|
||||
frame_addr = env->active_tc.gpr[29];
|
||||
trace_user_do_rt_sigreturn(env, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
|
||||
goto badframe;
|
||||
}
|
||||
|
||||
target_to_host_sigset(&blocked, &frame->rs_uc.tuc_sigmask);
|
||||
set_sigmask(&blocked);
|
||||
|
||||
restore_sigcontext(env, &frame->rs_uc.tuc_mcontext);
|
||||
|
||||
if (do_sigaltstack(frame_addr +
|
||||
offsetof(struct target_rt_sigframe, rs_uc.tuc_stack),
|
||||
0, get_sp_from_cpustate(env)) == -EFAULT)
|
||||
goto badframe;
|
||||
|
||||
env->active_tc.PC = env->CP0_EPC;
|
||||
mips_set_hflags_isa_mode_from_pc(env);
|
||||
/* I am not sure this is right, but it seems to work
|
||||
* maybe a problem with nested signals ? */
|
||||
env->CP0_EPC = 0;
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
|
||||
badframe:
|
||||
force_sig(TARGET_SIGSEGV);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
}
|
||||
|
||||
#elif defined(TARGET_PPC)
|
||||
#if defined(TARGET_PPC)
|
||||
|
||||
/* Size of dummy stack frame allocated when calling signal handler.
|
||||
See arch/powerpc/include/asm/ptrace.h. */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user