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linux-user: move sh4 signal.c parts to sh4 directory
No code change, only move code from signal.c to sh4/signal.c, except adding includes and exporting setup_frame() and setup_rt_frame(). Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20180424192635.6027-5-laurent@vivier.eu>
This commit is contained in:
Laurent Vivier
parent
5f7645975d
commit
0f22162a4d
@ -16,3 +16,335 @@
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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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/*
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* code and data structures from linux kernel:
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* include/asm-sh/sigcontext.h
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* arch/sh/kernel/signal.c
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*/
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struct target_sigcontext {
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target_ulong oldmask;
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/* CPU registers */
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target_ulong sc_gregs[16];
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target_ulong sc_pc;
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target_ulong sc_pr;
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target_ulong sc_sr;
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target_ulong sc_gbr;
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target_ulong sc_mach;
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target_ulong sc_macl;
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/* FPU registers */
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target_ulong sc_fpregs[16];
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target_ulong sc_xfpregs[16];
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unsigned int sc_fpscr;
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unsigned int sc_fpul;
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unsigned int sc_ownedfp;
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};
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struct target_sigframe
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{
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struct target_sigcontext sc;
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target_ulong extramask[TARGET_NSIG_WORDS-1];
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uint16_t retcode[3];
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};
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struct target_ucontext {
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target_ulong tuc_flags;
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struct target_ucontext *tuc_link;
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target_stack_t tuc_stack;
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask; /* mask last for extensibility */
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};
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struct target_rt_sigframe
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{
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struct target_siginfo info;
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struct target_ucontext uc;
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uint16_t retcode[3];
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};
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#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
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#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
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static abi_ulong get_sigframe(struct target_sigaction *ka,
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unsigned long sp, size_t frame_size)
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{
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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) & -8ul;
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}
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/* Notice when we're in the middle of a gUSA region and reset.
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Note that this will only occur for !parallel_cpus, as we will
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translate such sequences differently in a parallel context. */
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static void unwind_gusa(CPUSH4State *regs)
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{
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/* If the stack pointer is sufficiently negative, and we haven't
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completed the sequence, then reset to the entry to the region. */
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/* ??? The SH4 kernel checks for and address above 0xC0000000.
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However, the page mappings in qemu linux-user aren't as restricted
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and we wind up with the normal stack mapped above 0xF0000000.
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That said, there is no reason why the kernel should be allowing
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a gUSA region that spans 1GB. Use a tighter check here, for what
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can actually be enabled by the immediate move. */
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if (regs->gregs[15] >= -128u && regs->pc < regs->gregs[0]) {
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/* Reset the PC to before the gUSA region, as computed from
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R0 = region end, SP = -(region size), plus one more for the
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insn that actually initializes SP to the region size. */
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regs->pc = regs->gregs[0] + regs->gregs[15] - 2;
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/* Reset the SP to the saved version in R1. */
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regs->gregs[15] = regs->gregs[1];
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}
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}
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static void setup_sigcontext(struct target_sigcontext *sc,
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CPUSH4State *regs, unsigned long mask)
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{
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int i;
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#define COPY(x) __put_user(regs->x, &sc->sc_##x)
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COPY(gregs[0]); COPY(gregs[1]);
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COPY(gregs[2]); COPY(gregs[3]);
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COPY(gregs[4]); COPY(gregs[5]);
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COPY(gregs[6]); COPY(gregs[7]);
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COPY(gregs[8]); COPY(gregs[9]);
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COPY(gregs[10]); COPY(gregs[11]);
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COPY(gregs[12]); COPY(gregs[13]);
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COPY(gregs[14]); COPY(gregs[15]);
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COPY(gbr); COPY(mach);
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COPY(macl); COPY(pr);
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COPY(sr); COPY(pc);
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#undef COPY
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for (i=0; i<16; i++) {
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__put_user(regs->fregs[i], &sc->sc_fpregs[i]);
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}
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__put_user(regs->fpscr, &sc->sc_fpscr);
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__put_user(regs->fpul, &sc->sc_fpul);
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/* non-iBCS2 extensions.. */
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__put_user(mask, &sc->oldmask);
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}
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static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc)
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{
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int i;
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#define COPY(x) __get_user(regs->x, &sc->sc_##x)
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COPY(gregs[0]); COPY(gregs[1]);
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COPY(gregs[2]); COPY(gregs[3]);
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COPY(gregs[4]); COPY(gregs[5]);
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COPY(gregs[6]); COPY(gregs[7]);
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COPY(gregs[8]); COPY(gregs[9]);
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COPY(gregs[10]); COPY(gregs[11]);
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COPY(gregs[12]); COPY(gregs[13]);
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COPY(gregs[14]); COPY(gregs[15]);
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COPY(gbr); COPY(mach);
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COPY(macl); COPY(pr);
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COPY(sr); COPY(pc);
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#undef COPY
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for (i=0; i<16; i++) {
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__get_user(regs->fregs[i], &sc->sc_fpregs[i]);
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}
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__get_user(regs->fpscr, &sc->sc_fpscr);
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__get_user(regs->fpul, &sc->sc_fpul);
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regs->tra = -1; /* disable syscall checks */
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regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
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}
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void setup_frame(int sig, struct target_sigaction *ka,
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target_sigset_t *set, CPUSH4State *regs)
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{
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struct target_sigframe *frame;
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abi_ulong frame_addr;
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int i;
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unwind_gusa(regs);
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frame_addr = get_sigframe(ka, regs->gregs[15], 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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setup_sigcontext(&frame->sc, regs, set->sig[0]);
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for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
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__put_user(set->sig[i + 1], &frame->extramask[i]);
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}
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/* Set up to return from userspace. If provided, use a stub
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already in userspace. */
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if (ka->sa_flags & TARGET_SA_RESTORER) {
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regs->pr = (unsigned long) ka->sa_restorer;
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} else {
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/* Generate return code (system call to sigreturn) */
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abi_ulong retcode_addr = frame_addr +
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offsetof(struct target_sigframe, retcode);
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__put_user(MOVW(2), &frame->retcode[0]);
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__put_user(TRAP_NOARG, &frame->retcode[1]);
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__put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
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regs->pr = (unsigned long) retcode_addr;
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}
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/* Set up registers for signal handler */
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regs->gregs[15] = frame_addr;
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regs->gregs[4] = sig; /* Arg for signal handler */
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regs->gregs[5] = 0;
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regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
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regs->pc = (unsigned long) ka->_sa_handler;
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regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
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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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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, CPUSH4State *regs)
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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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unwind_gusa(regs);
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frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
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trace_user_setup_rt_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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tswap_siginfo(&frame->info, info);
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/* Create the ucontext. */
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__put_user(0, &frame->uc.tuc_flags);
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__put_user(0, (unsigned long *)&frame->uc.tuc_link);
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__put_user((unsigned long)target_sigaltstack_used.ss_sp,
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&frame->uc.tuc_stack.ss_sp);
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__put_user(sas_ss_flags(regs->gregs[15]),
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&frame->uc.tuc_stack.ss_flags);
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__put_user(target_sigaltstack_used.ss_size,
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&frame->uc.tuc_stack.ss_size);
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setup_sigcontext(&frame->uc.tuc_mcontext,
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regs, set->sig[0]);
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for(i = 0; i < TARGET_NSIG_WORDS; i++) {
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__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
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}
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/* Set up to return from userspace. If provided, use a stub
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already in userspace. */
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if (ka->sa_flags & TARGET_SA_RESTORER) {
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regs->pr = (unsigned long) ka->sa_restorer;
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} else {
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/* Generate return code (system call to sigreturn) */
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abi_ulong retcode_addr = frame_addr +
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offsetof(struct target_rt_sigframe, retcode);
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__put_user(MOVW(2), &frame->retcode[0]);
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__put_user(TRAP_NOARG, &frame->retcode[1]);
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__put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
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regs->pr = (unsigned long) retcode_addr;
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}
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/* Set up registers for signal handler */
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regs->gregs[15] = frame_addr;
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regs->gregs[4] = sig; /* Arg for signal handler */
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regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
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regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
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regs->pc = (unsigned long) ka->_sa_handler;
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regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
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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_sigreturn(CPUSH4State *regs)
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{
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struct target_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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int err = 0;
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frame_addr = regs->gregs[15];
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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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}
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__get_user(target_set.sig[0], &frame->sc.oldmask);
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for(i = 1; i < TARGET_NSIG_WORDS; i++) {
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__get_user(target_set.sig[i], &frame->extramask[i - 1]);
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}
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if (err)
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goto badframe;
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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->sc);
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unlock_user_struct(frame, frame_addr, 0);
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return -TARGET_QEMU_ESIGRETURN;
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badframe:
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unlock_user_struct(frame, frame_addr, 0);
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force_sig(TARGET_SIGSEGV);
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return -TARGET_QEMU_ESIGRETURN;
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}
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long do_rt_sigreturn(CPUSH4State *regs)
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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 = regs->gregs[15];
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trace_user_do_rt_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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}
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target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
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set_sigmask(&blocked);
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restore_sigcontext(regs, &frame->uc.tuc_mcontext);
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if (do_sigaltstack(frame_addr +
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offsetof(struct target_rt_sigframe, uc.tuc_stack),
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0, get_sp_from_cpustate(regs)) == -EFAULT) {
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goto badframe;
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}
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unlock_user_struct(frame, frame_addr, 0);
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return -TARGET_QEMU_ESIGRETURN;
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badframe:
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unlock_user_struct(frame, frame_addr, 0);
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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 +26,10 @@ static inline abi_ulong get_sp_from_cpustate(CPUSH4State *state)
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return state->gregs[15];
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}
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void setup_frame(int sig, struct target_sigaction *ka,
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target_sigset_t *set, CPUSH4State *regs);
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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, CPUSH4State *regs);
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#endif /* SH4_TARGET_SIGNAL_H */
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@ -2364,334 +2364,6 @@ badframe:
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return -TARGET_QEMU_ESIGRETURN;
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}
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#elif defined(TARGET_SH4)
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/*
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* code and data structures from linux kernel:
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* include/asm-sh/sigcontext.h
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* arch/sh/kernel/signal.c
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*/
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struct target_sigcontext {
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target_ulong oldmask;
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/* CPU registers */
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target_ulong sc_gregs[16];
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target_ulong sc_pc;
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target_ulong sc_pr;
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target_ulong sc_sr;
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target_ulong sc_gbr;
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target_ulong sc_mach;
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target_ulong sc_macl;
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/* FPU registers */
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target_ulong sc_fpregs[16];
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target_ulong sc_xfpregs[16];
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unsigned int sc_fpscr;
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unsigned int sc_fpul;
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unsigned int sc_ownedfp;
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};
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struct target_sigframe
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{
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struct target_sigcontext sc;
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target_ulong extramask[TARGET_NSIG_WORDS-1];
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uint16_t retcode[3];
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};
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|
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struct target_ucontext {
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target_ulong tuc_flags;
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struct target_ucontext *tuc_link;
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target_stack_t tuc_stack;
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struct target_sigcontext tuc_mcontext;
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target_sigset_t tuc_sigmask; /* mask last for extensibility */
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};
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struct target_rt_sigframe
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{
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struct target_siginfo info;
|
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struct target_ucontext uc;
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uint16_t retcode[3];
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};
|
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|
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#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */
|
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#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */
|
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|
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static abi_ulong get_sigframe(struct target_sigaction *ka,
|
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unsigned long sp, size_t frame_size)
|
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{
|
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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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|
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return (sp - frame_size) & -8ul;
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}
|
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|
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/* Notice when we're in the middle of a gUSA region and reset.
|
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Note that this will only occur for !parallel_cpus, as we will
|
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translate such sequences differently in a parallel context. */
|
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static void unwind_gusa(CPUSH4State *regs)
|
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{
|
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/* If the stack pointer is sufficiently negative, and we haven't
|
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completed the sequence, then reset to the entry to the region. */
|
||||
/* ??? The SH4 kernel checks for and address above 0xC0000000.
|
||||
However, the page mappings in qemu linux-user aren't as restricted
|
||||
and we wind up with the normal stack mapped above 0xF0000000.
|
||||
That said, there is no reason why the kernel should be allowing
|
||||
a gUSA region that spans 1GB. Use a tighter check here, for what
|
||||
can actually be enabled by the immediate move. */
|
||||
if (regs->gregs[15] >= -128u && regs->pc < regs->gregs[0]) {
|
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/* Reset the PC to before the gUSA region, as computed from
|
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R0 = region end, SP = -(region size), plus one more for the
|
||||
insn that actually initializes SP to the region size. */
|
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regs->pc = regs->gregs[0] + regs->gregs[15] - 2;
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|
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/* Reset the SP to the saved version in R1. */
|
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regs->gregs[15] = regs->gregs[1];
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}
|
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}
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||||
|
||||
static void setup_sigcontext(struct target_sigcontext *sc,
|
||||
CPUSH4State *regs, unsigned long mask)
|
||||
{
|
||||
int i;
|
||||
|
||||
#define COPY(x) __put_user(regs->x, &sc->sc_##x)
|
||||
COPY(gregs[0]); COPY(gregs[1]);
|
||||
COPY(gregs[2]); COPY(gregs[3]);
|
||||
COPY(gregs[4]); COPY(gregs[5]);
|
||||
COPY(gregs[6]); COPY(gregs[7]);
|
||||
COPY(gregs[8]); COPY(gregs[9]);
|
||||
COPY(gregs[10]); COPY(gregs[11]);
|
||||
COPY(gregs[12]); COPY(gregs[13]);
|
||||
COPY(gregs[14]); COPY(gregs[15]);
|
||||
COPY(gbr); COPY(mach);
|
||||
COPY(macl); COPY(pr);
|
||||
COPY(sr); COPY(pc);
|
||||
#undef COPY
|
||||
|
||||
for (i=0; i<16; i++) {
|
||||
__put_user(regs->fregs[i], &sc->sc_fpregs[i]);
|
||||
}
|
||||
__put_user(regs->fpscr, &sc->sc_fpscr);
|
||||
__put_user(regs->fpul, &sc->sc_fpul);
|
||||
|
||||
/* non-iBCS2 extensions.. */
|
||||
__put_user(mask, &sc->oldmask);
|
||||
}
|
||||
|
||||
static void restore_sigcontext(CPUSH4State *regs, struct target_sigcontext *sc)
|
||||
{
|
||||
int i;
|
||||
|
||||
#define COPY(x) __get_user(regs->x, &sc->sc_##x)
|
||||
COPY(gregs[0]); COPY(gregs[1]);
|
||||
COPY(gregs[2]); COPY(gregs[3]);
|
||||
COPY(gregs[4]); COPY(gregs[5]);
|
||||
COPY(gregs[6]); COPY(gregs[7]);
|
||||
COPY(gregs[8]); COPY(gregs[9]);
|
||||
COPY(gregs[10]); COPY(gregs[11]);
|
||||
COPY(gregs[12]); COPY(gregs[13]);
|
||||
COPY(gregs[14]); COPY(gregs[15]);
|
||||
COPY(gbr); COPY(mach);
|
||||
COPY(macl); COPY(pr);
|
||||
COPY(sr); COPY(pc);
|
||||
#undef COPY
|
||||
|
||||
for (i=0; i<16; i++) {
|
||||
__get_user(regs->fregs[i], &sc->sc_fpregs[i]);
|
||||
}
|
||||
__get_user(regs->fpscr, &sc->sc_fpscr);
|
||||
__get_user(regs->fpul, &sc->sc_fpul);
|
||||
|
||||
regs->tra = -1; /* disable syscall checks */
|
||||
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
|
||||
}
|
||||
|
||||
static void setup_frame(int sig, struct target_sigaction *ka,
|
||||
target_sigset_t *set, CPUSH4State *regs)
|
||||
{
|
||||
struct target_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
int i;
|
||||
|
||||
unwind_gusa(regs);
|
||||
|
||||
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
|
||||
trace_user_setup_frame(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
|
||||
goto give_sigsegv;
|
||||
}
|
||||
|
||||
setup_sigcontext(&frame->sc, regs, set->sig[0]);
|
||||
|
||||
for (i = 0; i < TARGET_NSIG_WORDS - 1; i++) {
|
||||
__put_user(set->sig[i + 1], &frame->extramask[i]);
|
||||
}
|
||||
|
||||
/* Set up to return from userspace. If provided, use a stub
|
||||
already in userspace. */
|
||||
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
||||
regs->pr = (unsigned long) ka->sa_restorer;
|
||||
} else {
|
||||
/* Generate return code (system call to sigreturn) */
|
||||
abi_ulong retcode_addr = frame_addr +
|
||||
offsetof(struct target_sigframe, retcode);
|
||||
__put_user(MOVW(2), &frame->retcode[0]);
|
||||
__put_user(TRAP_NOARG, &frame->retcode[1]);
|
||||
__put_user((TARGET_NR_sigreturn), &frame->retcode[2]);
|
||||
regs->pr = (unsigned long) retcode_addr;
|
||||
}
|
||||
|
||||
/* Set up registers for signal handler */
|
||||
regs->gregs[15] = frame_addr;
|
||||
regs->gregs[4] = sig; /* Arg for signal handler */
|
||||
regs->gregs[5] = 0;
|
||||
regs->gregs[6] = frame_addr += offsetof(typeof(*frame), sc);
|
||||
regs->pc = (unsigned long) ka->_sa_handler;
|
||||
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
|
||||
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
return;
|
||||
|
||||
give_sigsegv:
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
force_sigsegv(sig);
|
||||
}
|
||||
|
||||
static void setup_rt_frame(int sig, struct target_sigaction *ka,
|
||||
target_siginfo_t *info,
|
||||
target_sigset_t *set, CPUSH4State *regs)
|
||||
{
|
||||
struct target_rt_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
int i;
|
||||
|
||||
unwind_gusa(regs);
|
||||
|
||||
frame_addr = get_sigframe(ka, regs->gregs[15], sizeof(*frame));
|
||||
trace_user_setup_rt_frame(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
|
||||
goto give_sigsegv;
|
||||
}
|
||||
|
||||
tswap_siginfo(&frame->info, info);
|
||||
|
||||
/* Create the ucontext. */
|
||||
__put_user(0, &frame->uc.tuc_flags);
|
||||
__put_user(0, (unsigned long *)&frame->uc.tuc_link);
|
||||
__put_user((unsigned long)target_sigaltstack_used.ss_sp,
|
||||
&frame->uc.tuc_stack.ss_sp);
|
||||
__put_user(sas_ss_flags(regs->gregs[15]),
|
||||
&frame->uc.tuc_stack.ss_flags);
|
||||
__put_user(target_sigaltstack_used.ss_size,
|
||||
&frame->uc.tuc_stack.ss_size);
|
||||
setup_sigcontext(&frame->uc.tuc_mcontext,
|
||||
regs, set->sig[0]);
|
||||
for(i = 0; i < TARGET_NSIG_WORDS; i++) {
|
||||
__put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
|
||||
}
|
||||
|
||||
/* Set up to return from userspace. If provided, use a stub
|
||||
already in userspace. */
|
||||
if (ka->sa_flags & TARGET_SA_RESTORER) {
|
||||
regs->pr = (unsigned long) ka->sa_restorer;
|
||||
} else {
|
||||
/* Generate return code (system call to sigreturn) */
|
||||
abi_ulong retcode_addr = frame_addr +
|
||||
offsetof(struct target_rt_sigframe, retcode);
|
||||
__put_user(MOVW(2), &frame->retcode[0]);
|
||||
__put_user(TRAP_NOARG, &frame->retcode[1]);
|
||||
__put_user((TARGET_NR_rt_sigreturn), &frame->retcode[2]);
|
||||
regs->pr = (unsigned long) retcode_addr;
|
||||
}
|
||||
|
||||
/* Set up registers for signal handler */
|
||||
regs->gregs[15] = frame_addr;
|
||||
regs->gregs[4] = sig; /* Arg for signal handler */
|
||||
regs->gregs[5] = frame_addr + offsetof(typeof(*frame), info);
|
||||
regs->gregs[6] = frame_addr + offsetof(typeof(*frame), uc);
|
||||
regs->pc = (unsigned long) ka->_sa_handler;
|
||||
regs->flags &= ~(DELAY_SLOT_MASK | GUSA_MASK);
|
||||
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
return;
|
||||
|
||||
give_sigsegv:
|
||||
unlock_user_struct(frame, frame_addr, 1);
|
||||
force_sigsegv(sig);
|
||||
}
|
||||
|
||||
long do_sigreturn(CPUSH4State *regs)
|
||||
{
|
||||
struct target_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
sigset_t blocked;
|
||||
target_sigset_t target_set;
|
||||
int i;
|
||||
int err = 0;
|
||||
|
||||
frame_addr = regs->gregs[15];
|
||||
trace_user_do_sigreturn(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
|
||||
goto badframe;
|
||||
}
|
||||
|
||||
__get_user(target_set.sig[0], &frame->sc.oldmask);
|
||||
for(i = 1; i < TARGET_NSIG_WORDS; i++) {
|
||||
__get_user(target_set.sig[i], &frame->extramask[i - 1]);
|
||||
}
|
||||
|
||||
if (err)
|
||||
goto badframe;
|
||||
|
||||
target_to_host_sigset_internal(&blocked, &target_set);
|
||||
set_sigmask(&blocked);
|
||||
|
||||
restore_sigcontext(regs, &frame->sc);
|
||||
|
||||
unlock_user_struct(frame, frame_addr, 0);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
|
||||
badframe:
|
||||
unlock_user_struct(frame, frame_addr, 0);
|
||||
force_sig(TARGET_SIGSEGV);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
}
|
||||
|
||||
long do_rt_sigreturn(CPUSH4State *regs)
|
||||
{
|
||||
struct target_rt_sigframe *frame;
|
||||
abi_ulong frame_addr;
|
||||
sigset_t blocked;
|
||||
|
||||
frame_addr = regs->gregs[15];
|
||||
trace_user_do_rt_sigreturn(regs, frame_addr);
|
||||
if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
|
||||
goto badframe;
|
||||
}
|
||||
|
||||
target_to_host_sigset(&blocked, &frame->uc.tuc_sigmask);
|
||||
set_sigmask(&blocked);
|
||||
|
||||
restore_sigcontext(regs, &frame->uc.tuc_mcontext);
|
||||
|
||||
if (do_sigaltstack(frame_addr +
|
||||
offsetof(struct target_rt_sigframe, uc.tuc_stack),
|
||||
0, get_sp_from_cpustate(regs)) == -EFAULT) {
|
||||
goto badframe;
|
||||
}
|
||||
|
||||
unlock_user_struct(frame, frame_addr, 0);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
|
||||
badframe:
|
||||
unlock_user_struct(frame, frame_addr, 0);
|
||||
force_sig(TARGET_SIGSEGV);
|
||||
return -TARGET_QEMU_ESIGRETURN;
|
||||
}
|
||||
#elif defined(TARGET_MICROBLAZE)
|
||||
|
||||
struct target_sigcontext {
|
||||
|
||||
Loading…
Reference in New Issue
Block a user