diff options
author | Laurent Vivier <laurent@vivier.eu> | 2018-04-24 21:26:19 +0200 |
---|---|---|
committer | Laurent Vivier <laurent@vivier.eu> | 2018-04-30 09:47:47 +0200 |
commit | 0f22162a4df4b477eb1a5a3c2b9906ace8128a4c (patch) | |
tree | b5ba984b8f11d00213ef421a01dc829b0df300c3 | |
parent | 5f7645975d23b90a28067f258b79887aa30ada8e (diff) |
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>
-rw-r--r-- | linux-user/sh4/signal.c | 332 | ||||
-rw-r--r-- | linux-user/sh4/target_signal.h | 5 | ||||
-rw-r--r-- | linux-user/signal.c | 328 |
3 files changed, 337 insertions, 328 deletions
diff --git a/linux-user/sh4/signal.c b/linux-user/sh4/signal.c index 02ca338b6c..5ce182aff7 100644 --- a/linux-user/sh4/signal.c +++ b/linux-user/sh4/signal.c @@ -16,3 +16,335 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ +#include "qemu/osdep.h" +#include "qemu.h" +#include "target_signal.h" +#include "signal-common.h" +#include "linux-user/trace.h" + +/* + * code and data structures from linux kernel: + * include/asm-sh/sigcontext.h + * arch/sh/kernel/signal.c + */ + +struct target_sigcontext { + target_ulong oldmask; + + /* CPU registers */ + target_ulong sc_gregs[16]; + target_ulong sc_pc; + target_ulong sc_pr; + target_ulong sc_sr; + target_ulong sc_gbr; + target_ulong sc_mach; + target_ulong sc_macl; + + /* FPU registers */ + target_ulong sc_fpregs[16]; + target_ulong sc_xfpregs[16]; + unsigned int sc_fpscr; + unsigned int sc_fpul; + unsigned int sc_ownedfp; +}; + +struct target_sigframe +{ + struct target_sigcontext sc; + target_ulong extramask[TARGET_NSIG_WORDS-1]; + uint16_t retcode[3]; +}; + + +struct target_ucontext { + target_ulong tuc_flags; + struct target_ucontext *tuc_link; + target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + target_sigset_t tuc_sigmask; /* mask last for extensibility */ +}; + +struct target_rt_sigframe +{ + struct target_siginfo info; + struct target_ucontext uc; + uint16_t retcode[3]; +}; + + +#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ +#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ + +static abi_ulong get_sigframe(struct target_sigaction *ka, + unsigned long sp, size_t frame_size) +{ + 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) & -8ul; +} + +/* Notice when we're in the middle of a gUSA region and reset. + Note that this will only occur for !parallel_cpus, as we will + translate such sequences differently in a parallel context. */ +static void unwind_gusa(CPUSH4State *regs) +{ + /* If the stack pointer is sufficiently negative, and we haven't + 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]) { + /* Reset the PC to before the gUSA region, as computed from + R0 = region end, SP = -(region size), plus one more for the + insn that actually initializes SP to the region size. */ + regs->pc = regs->gregs[0] + regs->gregs[15] - 2; + + /* Reset the SP to the saved version in R1. */ + regs->gregs[15] = regs->gregs[1]; + } +} + +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); +} + +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); +} + +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; +} diff --git a/linux-user/sh4/target_signal.h b/linux-user/sh4/target_signal.h index cbf23b6a31..a2a93fa04a 100644 --- a/linux-user/sh4/target_signal.h +++ b/linux-user/sh4/target_signal.h @@ -26,5 +26,10 @@ static inline abi_ulong get_sp_from_cpustate(CPUSH4State *state) return state->gregs[15]; } +void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUSH4State *regs); +void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUSH4State *regs); #endif /* SH4_TARGET_SIGNAL_H */ diff --git a/linux-user/signal.c b/linux-user/signal.c index c99eae15d6..5429c9aa38 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -2364,334 +2364,6 @@ badframe: return -TARGET_QEMU_ESIGRETURN; } -#elif defined(TARGET_SH4) - -/* - * code and data structures from linux kernel: - * include/asm-sh/sigcontext.h - * arch/sh/kernel/signal.c - */ - -struct target_sigcontext { - target_ulong oldmask; - - /* CPU registers */ - target_ulong sc_gregs[16]; - target_ulong sc_pc; - target_ulong sc_pr; - target_ulong sc_sr; - target_ulong sc_gbr; - target_ulong sc_mach; - target_ulong sc_macl; - - /* FPU registers */ - target_ulong sc_fpregs[16]; - target_ulong sc_xfpregs[16]; - unsigned int sc_fpscr; - unsigned int sc_fpul; - unsigned int sc_ownedfp; -}; - -struct target_sigframe -{ - struct target_sigcontext sc; - target_ulong extramask[TARGET_NSIG_WORDS-1]; - uint16_t retcode[3]; -}; - - -struct target_ucontext { - target_ulong tuc_flags; - struct target_ucontext *tuc_link; - target_stack_t tuc_stack; - struct target_sigcontext tuc_mcontext; - target_sigset_t tuc_sigmask; /* mask last for extensibility */ -}; - -struct target_rt_sigframe -{ - struct target_siginfo info; - struct target_ucontext uc; - uint16_t retcode[3]; -}; - - -#define MOVW(n) (0x9300|((n)-2)) /* Move mem word at PC+n to R3 */ -#define TRAP_NOARG 0xc310 /* Syscall w/no args (NR in R3) SH3/4 */ - -static abi_ulong get_sigframe(struct target_sigaction *ka, - unsigned long sp, size_t frame_size) -{ - 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) & -8ul; -} - -/* Notice when we're in the middle of a gUSA region and reset. - Note that this will only occur for !parallel_cpus, as we will - translate such sequences differently in a parallel context. */ -static void unwind_gusa(CPUSH4State *regs) -{ - /* If the stack pointer is sufficiently negative, and we haven't - 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]) { - /* Reset the PC to before the gUSA region, as computed from - R0 = region end, SP = -(region size), plus one more for the - insn that actually initializes SP to the region size. */ - regs->pc = regs->gregs[0] + regs->gregs[15] - 2; - - /* Reset the SP to the saved version in R1. */ - regs->gregs[15] = regs->gregs[1]; - } -} - -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 { |