diff options
author | Laurent Vivier <laurent@vivier.eu> | 2018-04-24 21:26:20 +0200 |
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committer | Laurent Vivier <laurent@vivier.eu> | 2018-04-30 09:47:47 +0200 |
commit | f9fb3ba359637f73f1c2009b1447a994e5becee8 (patch) | |
tree | df449f42e04a6fc59e27ac6401fd8be920241e62 /linux-user/microblaze/signal.c | |
parent | 0f22162a4df4b477eb1a5a3c2b9906ace8128a4c (diff) |
linux-user: move microblaze signal.c parts to microblaze directory
No code change, only move code from signal.c to
microblaze/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: <20180424192635.6027-6-laurent@vivier.eu>
Diffstat (limited to 'linux-user/microblaze/signal.c')
-rw-r--r-- | linux-user/microblaze/signal.c | 230 |
1 files changed, 230 insertions, 0 deletions
diff --git a/linux-user/microblaze/signal.c b/linux-user/microblaze/signal.c index 02ca338b6c..5572baa7dc 100644 --- a/linux-user/microblaze/signal.c +++ b/linux-user/microblaze/signal.c @@ -16,3 +16,233 @@ * 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" + +struct target_sigcontext { + struct target_pt_regs regs; /* needs to be first */ + uint32_t oldmask; +}; + +struct target_stack_t { + abi_ulong ss_sp; + int ss_flags; + unsigned int ss_size; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong tuc_link; + struct target_stack_t tuc_stack; + struct target_sigcontext tuc_mcontext; + uint32_t tuc_extramask[TARGET_NSIG_WORDS - 1]; +}; + +/* Signal frames. */ +struct target_signal_frame { + struct target_ucontext uc; + uint32_t extramask[TARGET_NSIG_WORDS - 1]; + uint32_t tramp[2]; +}; + +struct rt_signal_frame { + siginfo_t info; + ucontext_t uc; + uint32_t tramp[2]; +}; + +static void setup_sigcontext(struct target_sigcontext *sc, CPUMBState *env) +{ + __put_user(env->regs[0], &sc->regs.r0); + __put_user(env->regs[1], &sc->regs.r1); + __put_user(env->regs[2], &sc->regs.r2); + __put_user(env->regs[3], &sc->regs.r3); + __put_user(env->regs[4], &sc->regs.r4); + __put_user(env->regs[5], &sc->regs.r5); + __put_user(env->regs[6], &sc->regs.r6); + __put_user(env->regs[7], &sc->regs.r7); + __put_user(env->regs[8], &sc->regs.r8); + __put_user(env->regs[9], &sc->regs.r9); + __put_user(env->regs[10], &sc->regs.r10); + __put_user(env->regs[11], &sc->regs.r11); + __put_user(env->regs[12], &sc->regs.r12); + __put_user(env->regs[13], &sc->regs.r13); + __put_user(env->regs[14], &sc->regs.r14); + __put_user(env->regs[15], &sc->regs.r15); + __put_user(env->regs[16], &sc->regs.r16); + __put_user(env->regs[17], &sc->regs.r17); + __put_user(env->regs[18], &sc->regs.r18); + __put_user(env->regs[19], &sc->regs.r19); + __put_user(env->regs[20], &sc->regs.r20); + __put_user(env->regs[21], &sc->regs.r21); + __put_user(env->regs[22], &sc->regs.r22); + __put_user(env->regs[23], &sc->regs.r23); + __put_user(env->regs[24], &sc->regs.r24); + __put_user(env->regs[25], &sc->regs.r25); + __put_user(env->regs[26], &sc->regs.r26); + __put_user(env->regs[27], &sc->regs.r27); + __put_user(env->regs[28], &sc->regs.r28); + __put_user(env->regs[29], &sc->regs.r29); + __put_user(env->regs[30], &sc->regs.r30); + __put_user(env->regs[31], &sc->regs.r31); + __put_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static void restore_sigcontext(struct target_sigcontext *sc, CPUMBState *env) +{ + __get_user(env->regs[0], &sc->regs.r0); + __get_user(env->regs[1], &sc->regs.r1); + __get_user(env->regs[2], &sc->regs.r2); + __get_user(env->regs[3], &sc->regs.r3); + __get_user(env->regs[4], &sc->regs.r4); + __get_user(env->regs[5], &sc->regs.r5); + __get_user(env->regs[6], &sc->regs.r6); + __get_user(env->regs[7], &sc->regs.r7); + __get_user(env->regs[8], &sc->regs.r8); + __get_user(env->regs[9], &sc->regs.r9); + __get_user(env->regs[10], &sc->regs.r10); + __get_user(env->regs[11], &sc->regs.r11); + __get_user(env->regs[12], &sc->regs.r12); + __get_user(env->regs[13], &sc->regs.r13); + __get_user(env->regs[14], &sc->regs.r14); + __get_user(env->regs[15], &sc->regs.r15); + __get_user(env->regs[16], &sc->regs.r16); + __get_user(env->regs[17], &sc->regs.r17); + __get_user(env->regs[18], &sc->regs.r18); + __get_user(env->regs[19], &sc->regs.r19); + __get_user(env->regs[20], &sc->regs.r20); + __get_user(env->regs[21], &sc->regs.r21); + __get_user(env->regs[22], &sc->regs.r22); + __get_user(env->regs[23], &sc->regs.r23); + __get_user(env->regs[24], &sc->regs.r24); + __get_user(env->regs[25], &sc->regs.r25); + __get_user(env->regs[26], &sc->regs.r26); + __get_user(env->regs[27], &sc->regs.r27); + __get_user(env->regs[28], &sc->regs.r28); + __get_user(env->regs[29], &sc->regs.r29); + __get_user(env->regs[30], &sc->regs.r30); + __get_user(env->regs[31], &sc->regs.r31); + __get_user(env->sregs[SR_PC], &sc->regs.pc); +} + +static abi_ulong get_sigframe(struct target_sigaction *ka, + CPUMBState *env, int frame_size) +{ + abi_ulong sp = env->regs[1]; + + if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !on_sig_stack(sp)) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + return ((sp - frame_size) & -8UL); +} + +void setup_frame(int sig, struct target_sigaction *ka, + target_sigset_t *set, CPUMBState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + int i; + + frame_addr = get_sigframe(ka, env, sizeof *frame); + trace_user_setup_frame(env, frame_addr); + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) + goto badframe; + + /* Save the mask. */ + __put_user(set->sig[0], &frame->uc.tuc_mcontext.oldmask); + + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __put_user(set->sig[i], &frame->extramask[i - 1]); + } + + setup_sigcontext(&frame->uc.tuc_mcontext, env); + + /* Set up to return from userspace. If provided, use a stub + already in userspace. */ + /* minus 8 is offset to cater for "rtsd r15,8" offset */ + if (ka->sa_flags & TARGET_SA_RESTORER) { + env->regs[15] = ((unsigned long)ka->sa_restorer)-8; + } else { + uint32_t t; + /* Note, these encodings are _big endian_! */ + /* addi r12, r0, __NR_sigreturn */ + t = 0x31800000UL | TARGET_NR_sigreturn; + __put_user(t, frame->tramp + 0); + /* brki r14, 0x8 */ + t = 0xb9cc0008UL; + __put_user(t, frame->tramp + 1); + + /* Return from sighandler will jump to the tramp. + Negative 8 offset because return is rtsd r15, 8 */ + env->regs[15] = frame_addr + offsetof(struct target_signal_frame, tramp) + - 8; + } + + /* Set up registers for signal handler */ + env->regs[1] = frame_addr; + /* Signal handler args: */ + env->regs[5] = sig; /* Arg 0: signum */ + env->regs[6] = 0; + /* arg 1: sigcontext */ + env->regs[7] = frame_addr += offsetof(typeof(*frame), uc); + + /* Offset of 4 to handle microblaze rtid r14, 0 */ + env->sregs[SR_PC] = (unsigned long)ka->_sa_handler; + + unlock_user_struct(frame, frame_addr, 1); + return; +badframe: + force_sigsegv(sig); +} + +void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUMBState *env) +{ + fprintf(stderr, "Microblaze setup_rt_frame: not implemented\n"); +} + +long do_sigreturn(CPUMBState *env) +{ + struct target_signal_frame *frame; + abi_ulong frame_addr; + target_sigset_t target_set; + sigset_t set; + int i; + + frame_addr = env->regs[R_SP]; + trace_user_do_sigreturn(env, frame_addr); + /* Make sure the guest isn't playing games. */ + if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 1)) + goto badframe; + + /* Restore blocked signals */ + __get_user(target_set.sig[0], &frame->uc.tuc_mcontext.oldmask); + for(i = 1; i < TARGET_NSIG_WORDS; i++) { + __get_user(target_set.sig[i], &frame->extramask[i - 1]); + } + target_to_host_sigset_internal(&set, &target_set); + set_sigmask(&set); + + restore_sigcontext(&frame->uc.tuc_mcontext, env); + /* We got here through a sigreturn syscall, our path back is via an + rtb insn so setup r14 for that. */ + env->regs[14] = env->sregs[SR_PC]; + + unlock_user_struct(frame, frame_addr, 0); + return -TARGET_QEMU_ESIGRETURN; +badframe: + force_sig(TARGET_SIGSEGV); + return -TARGET_QEMU_ESIGRETURN; +} + +long do_rt_sigreturn(CPUMBState *env) +{ + trace_user_do_rt_sigreturn(env, 0); + fprintf(stderr, "Microblaze do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} |