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author | Laurent Vivier <laurent@vivier.eu> | 2018-04-24 21:26:23 +0200 |
---|---|---|
committer | Laurent Vivier <laurent@vivier.eu> | 2018-04-30 09:47:47 +0200 |
commit | 17853172f7c3abaa6f1fa65c9c01104539da3a03 (patch) | |
tree | fcb46aad6fec1cd5e551674ebc3532c7b0f7a2dc | |
parent | f7cd3e678cda9c91f99a045e8d7d37247a558346 (diff) | |
download | qemu-17853172f7c3abaa6f1fa65c9c01104539da3a03.zip qemu-17853172f7c3abaa6f1fa65c9c01104539da3a03.tar.gz qemu-17853172f7c3abaa6f1fa65c9c01104539da3a03.tar.bz2 |
linux-user: move openrisc signal.c parts to openrisc directory
No code change, only move code from signal.c to
openrisc/signal.c, except adding includes and
exporting 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: <20180424192635.6027-9-laurent@vivier.eu>
-rw-r--r-- | linux-user/openrisc/signal.c | 213 | ||||
-rw-r--r-- | linux-user/openrisc/target_signal.h | 4 | ||||
-rw-r--r-- | linux-user/signal.c | 211 |
3 files changed, 216 insertions, 212 deletions
diff --git a/linux-user/openrisc/signal.c b/linux-user/openrisc/signal.c index 02ca338..0276808 100644 --- a/linux-user/openrisc/signal.c +++ b/linux-user/openrisc/signal.c @@ -16,3 +16,216 @@ * 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; + abi_ulong oldmask; + abi_ulong usp; +}; + +struct target_ucontext { + abi_ulong tuc_flags; + abi_ulong 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 { + abi_ulong pinfo; + uint64_t puc; + struct target_siginfo info; + struct target_sigcontext sc; + struct target_ucontext uc; + unsigned char retcode[16]; /* trampoline code */ +}; + +/* This is the asm-generic/ucontext.h version */ +#if 0 +static int restore_sigcontext(CPUOpenRISCState *regs, + struct target_sigcontext *sc) +{ + unsigned int err = 0; + unsigned long old_usp; + + /* Alwys make any pending restarted system call return -EINTR */ + current_thread_info()->restart_block.fn = do_no_restart_syscall; + + /* restore the regs from &sc->regs (same as sc, since regs is first) + * (sc is already checked for VERIFY_READ since the sigframe was + * checked in sys_sigreturn previously) + */ + + if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) { + goto badframe; + } + + /* make sure the U-flag is set so user-mode cannot fool us */ + + regs->sr &= ~SR_SM; + + /* restore the old USP as it was before we stacked the sc etc. + * (we cannot just pop the sigcontext since we aligned the sp and + * stuff after pushing it) + */ + + __get_user(old_usp, &sc->usp); + phx_signal("old_usp 0x%lx", old_usp); + + __PHX__ REALLY /* ??? */ + wrusp(old_usp); + regs->gpr[1] = old_usp; + + /* TODO: the other ports use regs->orig_XX to disable syscall checks + * after this completes, but we don't use that mechanism. maybe we can + * use it now ? + */ + + return err; + +badframe: + return 1; +} +#endif + +/* Set up a signal frame. */ + +static void setup_sigcontext(struct target_sigcontext *sc, + CPUOpenRISCState *regs, + unsigned long mask) +{ + unsigned long usp = cpu_get_gpr(regs, 1); + + /* copy the regs. they are first in sc so we can use sc directly */ + + /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/ + + /* Set the frametype to CRIS_FRAME_NORMAL for the execution of + the signal handler. The frametype will be restored to its previous + value in restore_sigcontext. */ + /*regs->frametype = CRIS_FRAME_NORMAL;*/ + + /* then some other stuff */ + __put_user(mask, &sc->oldmask); + __put_user(usp, &sc->usp); +} + +static inline unsigned long align_sigframe(unsigned long sp) +{ + return sp & ~3UL; +} + +static inline abi_ulong get_sigframe(struct target_sigaction *ka, + CPUOpenRISCState *regs, + size_t frame_size) +{ + unsigned long sp = cpu_get_gpr(regs, 1); + int onsigstack = on_sig_stack(sp); + + /* redzone */ + /* This is the X/Open sanctioned signal stack switching. */ + if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { + sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; + } + + sp = align_sigframe(sp - frame_size); + + /* + * If we are on the alternate signal stack and would overflow it, don't. + * Return an always-bogus address instead so we will die with SIGSEGV. + */ + + if (onsigstack && !likely(on_sig_stack(sp))) { + return -1L; + } + + return sp; +} + +void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUOpenRISCState *env) +{ + int err = 0; + abi_ulong frame_addr; + unsigned long return_ip; + struct target_rt_sigframe *frame; + abi_ulong info_addr, uc_addr; + + 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; + } + + info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); + __put_user(info_addr, &frame->pinfo); + uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); + __put_user(uc_addr, &frame->puc); + + if (ka->sa_flags & SA_SIGINFO) { + tswap_siginfo(&frame->info, info); + } + + /*err |= __clear_user(&frame->uc, offsetof(ucontext_t, uc_mcontext));*/ + __put_user(0, &frame->uc.tuc_flags); + __put_user(0, &frame->uc.tuc_link); + __put_user(target_sigaltstack_used.ss_sp, + &frame->uc.tuc_stack.ss_sp); + __put_user(sas_ss_flags(cpu_get_gpr(env, 1)), + &frame->uc.tuc_stack.ss_flags); + __put_user(target_sigaltstack_used.ss_size, + &frame->uc.tuc_stack.ss_size); + setup_sigcontext(&frame->sc, env, set->sig[0]); + + /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/ + + /* trampoline - the desired return ip is the retcode itself */ + return_ip = (unsigned long)&frame->retcode; + /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */ + __put_user(0xa960, (short *)(frame->retcode + 0)); + __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2)); + __put_user(0x20000001, (unsigned long *)(frame->retcode + 4)); + __put_user(0x15000000, (unsigned long *)(frame->retcode + 8)); + + if (err) { + goto give_sigsegv; + } + + /* TODO what is the current->exec_domain stuff and invmap ? */ + + /* Set up registers for signal handler */ + env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */ + cpu_set_gpr(env, 9, (unsigned long)return_ip); /* what we enter LATER */ + cpu_set_gpr(env, 3, (unsigned long)sig); /* arg 1: signo */ + cpu_set_gpr(env, 4, (unsigned long)&frame->info); /* arg 2: (siginfo_t*) */ + cpu_set_gpr(env, 5, (unsigned long)&frame->uc); /* arg 3: ucontext */ + + /* actually move the usp to reflect the stacked frame */ + cpu_set_gpr(env, 1, (unsigned long)frame); + + return; + +give_sigsegv: + unlock_user_struct(frame, frame_addr, 1); + force_sigsegv(sig); +} + +long do_sigreturn(CPUOpenRISCState *env) +{ + trace_user_do_sigreturn(env, 0); + fprintf(stderr, "do_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} + +long do_rt_sigreturn(CPUOpenRISCState *env) +{ + trace_user_do_rt_sigreturn(env, 0); + fprintf(stderr, "do_rt_sigreturn: not implemented\n"); + return -TARGET_ENOSYS; +} diff --git a/linux-user/openrisc/target_signal.h b/linux-user/openrisc/target_signal.h index 95a733e..6c47ddf 100644 --- a/linux-user/openrisc/target_signal.h +++ b/linux-user/openrisc/target_signal.h @@ -23,5 +23,7 @@ static inline abi_ulong get_sp_from_cpustate(CPUOpenRISCState *state) return cpu_get_gpr(state, 1); } - +void setup_rt_frame(int sig, struct target_sigaction *ka, + target_siginfo_t *info, + target_sigset_t *set, CPUOpenRISCState *env); #endif /* OPENRISC_TARGET_SIGNAL_H */ diff --git a/linux-user/signal.c b/linux-user/signal.c index e943980..dd85209 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -2364,217 +2364,6 @@ badframe: return -TARGET_QEMU_ESIGRETURN; } -#elif defined(TARGET_OPENRISC) - -struct target_sigcontext { - struct target_pt_regs regs; - abi_ulong oldmask; - abi_ulong usp; -}; - -struct target_ucontext { - abi_ulong tuc_flags; - abi_ulong 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 { - abi_ulong pinfo; - uint64_t puc; - struct target_siginfo info; - struct target_sigcontext sc; - struct target_ucontext uc; - unsigned char retcode[16]; /* trampoline code */ -}; - -/* This is the asm-generic/ucontext.h version */ -#if 0 -static int restore_sigcontext(CPUOpenRISCState *regs, - struct target_sigcontext *sc) -{ - unsigned int err = 0; - unsigned long old_usp; - - /* Alwys make any pending restarted system call return -EINTR */ - current_thread_info()->restart_block.fn = do_no_restart_syscall; - - /* restore the regs from &sc->regs (same as sc, since regs is first) - * (sc is already checked for VERIFY_READ since the sigframe was - * checked in sys_sigreturn previously) - */ - - if (copy_from_user(regs, &sc, sizeof(struct target_pt_regs))) { - goto badframe; - } - - /* make sure the U-flag is set so user-mode cannot fool us */ - - regs->sr &= ~SR_SM; - - /* restore the old USP as it was before we stacked the sc etc. - * (we cannot just pop the sigcontext since we aligned the sp and - * stuff after pushing it) - */ - - __get_user(old_usp, &sc->usp); - phx_signal("old_usp 0x%lx", old_usp); - - __PHX__ REALLY /* ??? */ - wrusp(old_usp); - regs->gpr[1] = old_usp; - - /* TODO: the other ports use regs->orig_XX to disable syscall checks - * after this completes, but we don't use that mechanism. maybe we can - * use it now ? - */ - - return err; - -badframe: - return 1; -} -#endif - -/* Set up a signal frame. */ - -static void setup_sigcontext(struct target_sigcontext *sc, - CPUOpenRISCState *regs, - unsigned long mask) -{ - unsigned long usp = cpu_get_gpr(regs, 1); - - /* copy the regs. they are first in sc so we can use sc directly */ - - /*copy_to_user(&sc, regs, sizeof(struct target_pt_regs));*/ - - /* Set the frametype to CRIS_FRAME_NORMAL for the execution of - the signal handler. The frametype will be restored to its previous - value in restore_sigcontext. */ - /*regs->frametype = CRIS_FRAME_NORMAL;*/ - - /* then some other stuff */ - __put_user(mask, &sc->oldmask); - __put_user(usp, &sc->usp); -} - -static inline unsigned long align_sigframe(unsigned long sp) -{ - return sp & ~3UL; -} - -static inline abi_ulong get_sigframe(struct target_sigaction *ka, - CPUOpenRISCState *regs, - size_t frame_size) -{ - unsigned long sp = cpu_get_gpr(regs, 1); - int onsigstack = on_sig_stack(sp); - - /* redzone */ - /* This is the X/Open sanctioned signal stack switching. */ - if ((ka->sa_flags & TARGET_SA_ONSTACK) != 0 && !onsigstack) { - sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size; - } - - sp = align_sigframe(sp - frame_size); - - /* - * If we are on the alternate signal stack and would overflow it, don't. - * Return an always-bogus address instead so we will die with SIGSEGV. - */ - - if (onsigstack && !likely(on_sig_stack(sp))) { - return -1L; - } - - return sp; -} - -static void setup_rt_frame(int sig, struct target_sigaction *ka, - target_siginfo_t *info, - target_sigset_t *set, CPUOpenRISCState *env) -{ - int err = 0; - abi_ulong frame_addr; - unsigned long return_ip; - struct target_rt_sigframe *frame; - abi_ulong info_addr, uc_addr; - - 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; - } - - info_addr = frame_addr + offsetof(struct target_rt_sigframe, info); - __put_user(info_addr, &frame->pinfo); - uc_addr = frame_addr + offsetof(struct target_rt_sigframe, uc); - __put_user(uc_addr, &frame->puc); - - if (ka->sa_flags & SA_SIGINFO) { - tswap_siginfo(&frame->info, info); - } - - /*err |= __clear_user(&frame->uc, offsetof(ucontext_t, uc_mcontext));*/ - __put_user(0, &frame->uc.tuc_flags); - __put_user(0, &frame->uc.tuc_link); - __put_user(target_sigaltstack_used.ss_sp, - &frame->uc.tuc_stack.ss_sp); - __put_user(sas_ss_flags(cpu_get_gpr(env, 1)), - &frame->uc.tuc_stack.ss_flags); - __put_user(target_sigaltstack_used.ss_size, - &frame->uc.tuc_stack.ss_size); - setup_sigcontext(&frame->sc, env, set->sig[0]); - - /*err |= copy_to_user(frame->uc.tuc_sigmask, set, sizeof(*set));*/ - - /* trampoline - the desired return ip is the retcode itself */ - return_ip = (unsigned long)&frame->retcode; - /* This is l.ori r11,r0,__NR_sigreturn, l.sys 1 */ - __put_user(0xa960, (short *)(frame->retcode + 0)); - __put_user(TARGET_NR_rt_sigreturn, (short *)(frame->retcode + 2)); - __put_user(0x20000001, (unsigned long *)(frame->retcode + 4)); - __put_user(0x15000000, (unsigned long *)(frame->retcode + 8)); - - if (err) { - goto give_sigsegv; - } - - /* TODO what is the current->exec_domain stuff and invmap ? */ - - /* Set up registers for signal handler */ - env->pc = (unsigned long)ka->_sa_handler; /* what we enter NOW */ - cpu_set_gpr(env, 9, (unsigned long)return_ip); /* what we enter LATER */ - cpu_set_gpr(env, 3, (unsigned long)sig); /* arg 1: signo */ - cpu_set_gpr(env, 4, (unsigned long)&frame->info); /* arg 2: (siginfo_t*) */ - cpu_set_gpr(env, 5, (unsigned long)&frame->uc); /* arg 3: ucontext */ - - /* actually move the usp to reflect the stacked frame */ - cpu_set_gpr(env, 1, (unsigned long)frame); - - return; - -give_sigsegv: - unlock_user_struct(frame, frame_addr, 1); - force_sigsegv(sig); -} - -long do_sigreturn(CPUOpenRISCState *env) -{ - trace_user_do_sigreturn(env, 0); - fprintf(stderr, "do_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} - -long do_rt_sigreturn(CPUOpenRISCState *env) -{ - trace_user_do_rt_sigreturn(env, 0); - fprintf(stderr, "do_rt_sigreturn: not implemented\n"); - return -TARGET_ENOSYS; -} -/* TARGET_OPENRISC */ - #elif defined(TARGET_S390X) #define __NUM_GPRS 16 |