Re: [Qemu-devel] [PATCH for 2.13 v2 03/20] linux-user: move arm signal.c parts to arm directory

["Alex Bennée" <alex.bennee@linaro.org>]

Laurent Vivier <laurent@vivier.eu> writes:

> No code change, only move code from signal.c to
> arm/signal.c, except adding includes and
> exporting setup_frame() and setup_rt_frame().
>
> Signed-off-by: Laurent Vivier <laurent@vivier.eu>

Apparently there are some tabs in the old code, could you de-tabify on
the next iteration please?

> ---
>  linux-user/arm/signal.c        | 754 +++++++++++++++++++++++++++++++++++++++++
>  linux-user/arm/target_signal.h |   6 +-
>  linux-user/signal.c            | 751 ----------------------------------------
>  3 files changed, 759 insertions(+), 752 deletions(-)
>
> diff --git a/linux-user/arm/signal.c b/linux-user/arm/signal.c
> index 02ca338b6c..975f80fdd2 100644
> --- a/linux-user/arm/signal.c
> +++ b/linux-user/arm/signal.c
> @@ -16,3 +16,757 @@
>   *  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 {
> +    abi_ulong trap_no;
> +    abi_ulong error_code;
> +    abi_ulong oldmask;
> +    abi_ulong arm_r0;
> +    abi_ulong arm_r1;
> +    abi_ulong arm_r2;
> +    abi_ulong arm_r3;
> +    abi_ulong arm_r4;
> +    abi_ulong arm_r5;
> +    abi_ulong arm_r6;
> +    abi_ulong arm_r7;
> +    abi_ulong arm_r8;
> +    abi_ulong arm_r9;
> +    abi_ulong arm_r10;
> +    abi_ulong arm_fp;
> +    abi_ulong arm_ip;
> +    abi_ulong arm_sp;
> +    abi_ulong arm_lr;
> +    abi_ulong arm_pc;
> +    abi_ulong arm_cpsr;
> +    abi_ulong fault_address;
> +};
> +
> +struct target_ucontext_v1 {
> +    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_ucontext_v2 {
> +    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 */
> +    char __unused[128 - sizeof(target_sigset_t)];
> +    abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
> +};
> +
> +struct target_user_vfp {
> +    uint64_t fpregs[32];
> +    abi_ulong fpscr;
> +};
> +
> +struct target_user_vfp_exc {
> +    abi_ulong fpexc;
> +    abi_ulong fpinst;
> +    abi_ulong fpinst2;
> +};
> +
> +struct target_vfp_sigframe {
> +    abi_ulong magic;
> +    abi_ulong size;
> +    struct target_user_vfp ufp;
> +    struct target_user_vfp_exc ufp_exc;
> +} __attribute__((__aligned__(8)));
> +
> +struct target_iwmmxt_sigframe {
> +    abi_ulong magic;
> +    abi_ulong size;
> +    uint64_t regs[16];
> +    /* Note that not all the coprocessor control registers are stored here */
> +    uint32_t wcssf;
> +    uint32_t wcasf;
> +    uint32_t wcgr0;
> +    uint32_t wcgr1;
> +    uint32_t wcgr2;
> +    uint32_t wcgr3;
> +} __attribute__((__aligned__(8)));
> +
> +#define TARGET_VFP_MAGIC 0x56465001
> +#define TARGET_IWMMXT_MAGIC 0x12ef842a
> +
> +struct sigframe_v1
> +{
> +    struct target_sigcontext sc;
> +    abi_ulong extramask[TARGET_NSIG_WORDS-1];
> +    abi_ulong retcode;
> +};
> +
> +struct sigframe_v2
> +{
> +    struct target_ucontext_v2 uc;
> +    abi_ulong retcode;
> +};
> +
> +struct rt_sigframe_v1
> +{
> +    abi_ulong pinfo;
> +    abi_ulong puc;
> +    struct target_siginfo info;
> +    struct target_ucontext_v1 uc;
> +    abi_ulong retcode;
> +};
> +
> +struct rt_sigframe_v2
> +{
> +    struct target_siginfo info;
> +    struct target_ucontext_v2 uc;
> +    abi_ulong retcode;
> +};
> +
> +#define TARGET_CONFIG_CPU_32 1
> +
> +/*
> + * For ARM syscalls, we encode the syscall number into the instruction.
> + */
> +#define SWI_SYS_SIGRETURN	(0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
> +#define SWI_SYS_RT_SIGRETURN	(0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
> +
> +/*
> + * For Thumb syscalls, we pass the syscall number via r7.  We therefore
> + * need two 16-bit instructions.
> + */
> +#define SWI_THUMB_SIGRETURN	(0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
> +#define SWI_THUMB_RT_SIGRETURN	(0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
> +
> +static const abi_ulong retcodes[4] = {
> +	SWI_SYS_SIGRETURN,	SWI_THUMB_SIGRETURN,
> +	SWI_SYS_RT_SIGRETURN,	SWI_THUMB_RT_SIGRETURN
> +};
> +
> +
> +static inline int valid_user_regs(CPUARMState *regs)
> +{
> +    return 1;
> +}
> +
> +static void
> +setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
> +                 CPUARMState *env, abi_ulong mask)
> +{
> +    __put_user(env->regs[0], &sc->arm_r0);
> +    __put_user(env->regs[1], &sc->arm_r1);
> +    __put_user(env->regs[2], &sc->arm_r2);
> +    __put_user(env->regs[3], &sc->arm_r3);
> +    __put_user(env->regs[4], &sc->arm_r4);
> +    __put_user(env->regs[5], &sc->arm_r5);
> +    __put_user(env->regs[6], &sc->arm_r6);
> +    __put_user(env->regs[7], &sc->arm_r7);
> +    __put_user(env->regs[8], &sc->arm_r8);
> +    __put_user(env->regs[9], &sc->arm_r9);
> +    __put_user(env->regs[10], &sc->arm_r10);
> +    __put_user(env->regs[11], &sc->arm_fp);
> +    __put_user(env->regs[12], &sc->arm_ip);
> +    __put_user(env->regs[13], &sc->arm_sp);
> +    __put_user(env->regs[14], &sc->arm_lr);
> +    __put_user(env->regs[15], &sc->arm_pc);
> +#ifdef TARGET_CONFIG_CPU_32
> +    __put_user(cpsr_read(env), &sc->arm_cpsr);
> +#endif
> +
> +    __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
> +    __put_user(/* current->thread.error_code */ 0, &sc->error_code);
> +    __put_user(/* current->thread.address */ 0, &sc->fault_address);
> +    __put_user(mask, &sc->oldmask);
> +}
> +
> +static inline abi_ulong
> +get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
> +{
> +    unsigned long sp = regs->regs[13];
> +
> +    /*
> +     * This is the X/Open sanctioned signal stack switching.
> +     */
> +    if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
> +        sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
> +    }
> +    /*
> +     * ATPCS B01 mandates 8-byte alignment
> +     */
> +    return (sp - framesize) & ~7;
> +}
> +
> +static void
> +setup_return(CPUARMState *env, struct target_sigaction *ka,
> +             abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
> +{
> +    abi_ulong handler = ka->_sa_handler;
> +    abi_ulong retcode;
> +    int thumb = handler & 1;
> +    uint32_t cpsr = cpsr_read(env);
> +
> +    cpsr &= ~CPSR_IT;
> +    if (thumb) {
> +        cpsr |= CPSR_T;
> +    } else {
> +        cpsr &= ~CPSR_T;
> +    }
> +
> +    if (ka->sa_flags & TARGET_SA_RESTORER) {
> +        retcode = ka->sa_restorer;
> +    } else {
> +        unsigned int idx = thumb;
> +
> +        if (ka->sa_flags & TARGET_SA_SIGINFO) {
> +            idx += 2;
> +        }
> +
> +        __put_user(retcodes[idx], rc);
> +
> +        retcode = rc_addr + thumb;
> +    }
> +
> +    env->regs[0] = usig;
> +    env->regs[13] = frame_addr;
> +    env->regs[14] = retcode;
> +    env->regs[15] = handler & (thumb ? ~1 : ~3);
> +    cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr);
> +}
> +
> +static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
> +{
> +    int i;
> +    struct target_vfp_sigframe *vfpframe;
> +    vfpframe = (struct target_vfp_sigframe *)regspace;
> +    __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
> +    __put_user(sizeof(*vfpframe), &vfpframe->size);
> +    for (i = 0; i < 32; i++) {
> +        __put_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
> +    }
> +    __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
> +    __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
> +    __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
> +    __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
> +    return (abi_ulong*)(vfpframe+1);
> +}
> +
> +static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
> +                                           CPUARMState *env)
> +{
> +    int i;
> +    struct target_iwmmxt_sigframe *iwmmxtframe;
> +    iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
> +    __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
> +    __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
> +    for (i = 0; i < 16; i++) {
> +        __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
> +    }
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
> +    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
> +    return (abi_ulong*)(iwmmxtframe+1);
> +}
> +
> +static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
> +                              target_sigset_t *set, CPUARMState *env)
> +{
> +    struct target_sigaltstack stack;
> +    int i;
> +    abi_ulong *regspace;
> +
> +    /* Clear all the bits of the ucontext we don't use.  */
> +    memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
> +
> +    memset(&stack, 0, sizeof(stack));
> +    __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
> +    __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
> +    __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
> +    memcpy(&uc->tuc_stack, &stack, sizeof(stack));
> +
> +    setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
> +    /* Save coprocessor signal frame.  */
> +    regspace = uc->tuc_regspace;
> +    if (arm_feature(env, ARM_FEATURE_VFP)) {
> +        regspace = setup_sigframe_v2_vfp(regspace, env);
> +    }
> +    if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
> +        regspace = setup_sigframe_v2_iwmmxt(regspace, env);
> +    }
> +
> +    /* Write terminating magic word */
> +    __put_user(0, regspace);
> +
> +    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
> +        __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
> +    }
> +}
> +
> +/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
> +static void setup_frame_v1(int usig, struct target_sigaction *ka,
> +                           target_sigset_t *set, CPUARMState *regs)
> +{
> +    struct sigframe_v1 *frame;
> +    abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
> +    int i;
> +
> +    trace_user_setup_frame(regs, frame_addr);
> +    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> +        goto sigsegv;
> +    }
> +
> +    setup_sigcontext(&frame->sc, regs, set->sig[0]);
> +
> +    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
> +        __put_user(set->sig[i], &frame->extramask[i - 1]);
> +    }
> +
> +    setup_return(regs, ka, &frame->retcode, frame_addr, usig,
> +                 frame_addr + offsetof(struct sigframe_v1, retcode));
> +
> +    unlock_user_struct(frame, frame_addr, 1);
> +    return;
> +sigsegv:
> +    force_sigsegv(usig);
> +}
> +
> +static void setup_frame_v2(int usig, struct target_sigaction *ka,
> +                           target_sigset_t *set, CPUARMState *regs)
> +{
> +    struct sigframe_v2 *frame;
> +    abi_ulong 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 sigsegv;
> +    }
> +
> +    setup_sigframe_v2(&frame->uc, set, regs);
> +
> +    setup_return(regs, ka, &frame->retcode, frame_addr, usig,
> +                 frame_addr + offsetof(struct sigframe_v2, retcode));
> +
> +    unlock_user_struct(frame, frame_addr, 1);
> +    return;
> +sigsegv:
> +    force_sigsegv(usig);
> +}
> +
> +void setup_frame(int usig, struct target_sigaction *ka,
> +                 target_sigset_t *set, CPUARMState *regs)
> +{
> +    if (get_osversion() >= 0x020612) {
> +        setup_frame_v2(usig, ka, set, regs);
> +    } else {
> +        setup_frame_v1(usig, ka, set, regs);
> +    }
> +}
> +
> +/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
> +static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
> +                              target_siginfo_t *info,
> +                              target_sigset_t *set, CPUARMState *env)
> +{
> +    struct rt_sigframe_v1 *frame;
> +    abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
> +    struct target_sigaltstack stack;
> +    int i;
> +    abi_ulong info_addr, uc_addr;
> +
> +    trace_user_setup_rt_frame(env, frame_addr);
> +    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> +        goto sigsegv;
> +    }
> +
> +    info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
> +    __put_user(info_addr, &frame->pinfo);
> +    uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
> +    __put_user(uc_addr, &frame->puc);
> +    tswap_siginfo(&frame->info, info);
> +
> +    /* Clear all the bits of the ucontext we don't use.  */
> +    memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
> +
> +    memset(&stack, 0, sizeof(stack));
> +    __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
> +    __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
> +    __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
> +    memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
> +
> +    setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
> +    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
> +        __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
> +    }
> +
> +    setup_return(env, ka, &frame->retcode, frame_addr, usig,
> +                 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
> +
> +    env->regs[1] = info_addr;
> +    env->regs[2] = uc_addr;
> +
> +    unlock_user_struct(frame, frame_addr, 1);
> +    return;
> +sigsegv:
> +    force_sigsegv(usig);
> +}
> +
> +static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
> +                              target_siginfo_t *info,
> +                              target_sigset_t *set, CPUARMState *env)
> +{
> +    struct rt_sigframe_v2 *frame;
> +    abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
> +    abi_ulong info_addr, uc_addr;
> +
> +    trace_user_setup_rt_frame(env, frame_addr);
> +    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> +        goto sigsegv;
> +    }
> +
> +    info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
> +    uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
> +    tswap_siginfo(&frame->info, info);
> +
> +    setup_sigframe_v2(&frame->uc, set, env);
> +
> +    setup_return(env, ka, &frame->retcode, frame_addr, usig,
> +                 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
> +
> +    env->regs[1] = info_addr;
> +    env->regs[2] = uc_addr;
> +
> +    unlock_user_struct(frame, frame_addr, 1);
> +    return;
> +sigsegv:
> +    force_sigsegv(usig);
> +}
> +
> +void setup_rt_frame(int usig, struct target_sigaction *ka,
> +                    target_siginfo_t *info,
> +                    target_sigset_t *set, CPUARMState *env)
> +{
> +    if (get_osversion() >= 0x020612) {
> +        setup_rt_frame_v2(usig, ka, info, set, env);
> +    } else {
> +        setup_rt_frame_v1(usig, ka, info, set, env);
> +    }
> +}
> +
> +static int
> +restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
> +{
> +    int err = 0;
> +    uint32_t cpsr;
> +
> +    __get_user(env->regs[0], &sc->arm_r0);
> +    __get_user(env->regs[1], &sc->arm_r1);
> +    __get_user(env->regs[2], &sc->arm_r2);
> +    __get_user(env->regs[3], &sc->arm_r3);
> +    __get_user(env->regs[4], &sc->arm_r4);
> +    __get_user(env->regs[5], &sc->arm_r5);
> +    __get_user(env->regs[6], &sc->arm_r6);
> +    __get_user(env->regs[7], &sc->arm_r7);
> +    __get_user(env->regs[8], &sc->arm_r8);
> +    __get_user(env->regs[9], &sc->arm_r9);
> +    __get_user(env->regs[10], &sc->arm_r10);
> +    __get_user(env->regs[11], &sc->arm_fp);
> +    __get_user(env->regs[12], &sc->arm_ip);
> +    __get_user(env->regs[13], &sc->arm_sp);
> +    __get_user(env->regs[14], &sc->arm_lr);
> +    __get_user(env->regs[15], &sc->arm_pc);
> +#ifdef TARGET_CONFIG_CPU_32
> +    __get_user(cpsr, &sc->arm_cpsr);
> +    cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr);
> +#endif
> +
> +    err |= !valid_user_regs(env);
> +
> +    return err;
> +}
> +
> +static long do_sigreturn_v1(CPUARMState *env)
> +{
> +    abi_ulong frame_addr;
> +    struct sigframe_v1 *frame = NULL;
> +    target_sigset_t set;
> +    sigset_t host_set;
> +    int i;
> +
> +    /*
> +     * Since we stacked the signal on a 64-bit boundary,
> +     * then 'sp' should be word aligned here.  If it's
> +     * not, then the user is trying to mess with us.
> +     */
> +    frame_addr = env->regs[13];
> +    trace_user_do_sigreturn(env, frame_addr);
> +    if (frame_addr & 7) {
> +        goto badframe;
> +    }
> +
> +    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> +        goto badframe;
> +    }
> +
> +    __get_user(set.sig[0], &frame->sc.oldmask);
> +    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
> +        __get_user(set.sig[i], &frame->extramask[i - 1]);
> +    }
> +
> +    target_to_host_sigset_internal(&host_set, &set);
> +    set_sigmask(&host_set);
> +
> +    if (restore_sigcontext(env, &frame->sc)) {
> +        goto badframe;
> +    }
> +
> +#if 0
> +    /* Send SIGTRAP if we're single-stepping */
> +    if (ptrace_cancel_bpt(current))
> +        send_sig(SIGTRAP, current, 1);
> +#endif
> +    unlock_user_struct(frame, frame_addr, 0);
> +    return -TARGET_QEMU_ESIGRETURN;
> +
> +badframe:
> +    force_sig(TARGET_SIGSEGV);
> +    return -TARGET_QEMU_ESIGRETURN;
> +}
> +
> +static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
> +{
> +    int i;
> +    abi_ulong magic, sz;
> +    uint32_t fpscr, fpexc;
> +    struct target_vfp_sigframe *vfpframe;
> +    vfpframe = (struct target_vfp_sigframe *)regspace;
> +
> +    __get_user(magic, &vfpframe->magic);
> +    __get_user(sz, &vfpframe->size);
> +    if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
> +        return 0;
> +    }
> +    for (i = 0; i < 32; i++) {
> +        __get_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
> +    }
> +    __get_user(fpscr, &vfpframe->ufp.fpscr);
> +    vfp_set_fpscr(env, fpscr);
> +    __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
> +    /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
> +     * and the exception flag is cleared
> +     */
> +    fpexc |= (1 << 30);
> +    fpexc &= ~((1 << 31) | (1 << 28));
> +    env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
> +    __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
> +    __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
> +    return (abi_ulong*)(vfpframe + 1);
> +}
> +
> +static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
> +                                             abi_ulong *regspace)
> +{
> +    int i;
> +    abi_ulong magic, sz;
> +    struct target_iwmmxt_sigframe *iwmmxtframe;
> +    iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
> +
> +    __get_user(magic, &iwmmxtframe->magic);
> +    __get_user(sz, &iwmmxtframe->size);
> +    if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
> +        return 0;
> +    }
> +    for (i = 0; i < 16; i++) {
> +        __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
> +    }
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
> +    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
> +    return (abi_ulong*)(iwmmxtframe + 1);
> +}
> +
> +static int do_sigframe_return_v2(CPUARMState *env,
> +                                 target_ulong context_addr,
> +                                 struct target_ucontext_v2 *uc)
> +{
> +    sigset_t host_set;
> +    abi_ulong *regspace;
> +
> +    target_to_host_sigset(&host_set, &uc->tuc_sigmask);
> +    set_sigmask(&host_set);
> +
> +    if (restore_sigcontext(env, &uc->tuc_mcontext))
> +        return 1;
> +
> +    /* Restore coprocessor signal frame */
> +    regspace = uc->tuc_regspace;
> +    if (arm_feature(env, ARM_FEATURE_VFP)) {
> +        regspace = restore_sigframe_v2_vfp(env, regspace);
> +        if (!regspace) {
> +            return 1;
> +        }
> +    }
> +    if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
> +        regspace = restore_sigframe_v2_iwmmxt(env, regspace);
> +        if (!regspace) {
> +            return 1;
> +        }
> +    }
> +
> +    if (do_sigaltstack(context_addr
> +                       + offsetof(struct target_ucontext_v2, tuc_stack),
> +                       0, get_sp_from_cpustate(env)) == -EFAULT) {
> +        return 1;
> +    }
> +
> +#if 0
> +    /* Send SIGTRAP if we're single-stepping */
> +    if (ptrace_cancel_bpt(current))
> +        send_sig(SIGTRAP, current, 1);
> +#endif
> +
> +    return 0;
> +}
> +
> +static long do_sigreturn_v2(CPUARMState *env)
> +{
> +    abi_ulong frame_addr;
> +    struct sigframe_v2 *frame = NULL;
> +
> +    /*
> +     * Since we stacked the signal on a 64-bit boundary,
> +     * then 'sp' should be word aligned here.  If it's
> +     * not, then the user is trying to mess with us.
> +     */
> +    frame_addr = env->regs[13];
> +    trace_user_do_sigreturn(env, frame_addr);
> +    if (frame_addr & 7) {
> +        goto badframe;
> +    }
> +
> +    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> +        goto badframe;
> +    }
> +
> +    if (do_sigframe_return_v2(env,
> +                              frame_addr
> +                              + offsetof(struct sigframe_v2, uc),
> +                              &frame->uc)) {
> +        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;
> +}
> +
> +long do_sigreturn(CPUARMState *env)
> +{
> +    if (get_osversion() >= 0x020612) {
> +        return do_sigreturn_v2(env);
> +    } else {
> +        return do_sigreturn_v1(env);
> +    }
> +}
> +
> +static long do_rt_sigreturn_v1(CPUARMState *env)
> +{
> +    abi_ulong frame_addr;
> +    struct rt_sigframe_v1 *frame = NULL;
> +    sigset_t host_set;
> +
> +    /*
> +     * Since we stacked the signal on a 64-bit boundary,
> +     * then 'sp' should be word aligned here.  If it's
> +     * not, then the user is trying to mess with us.
> +     */
> +    frame_addr = env->regs[13];
> +    trace_user_do_rt_sigreturn(env, frame_addr);
> +    if (frame_addr & 7) {
> +        goto badframe;
> +    }
> +
> +    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> +        goto badframe;
> +    }
> +
> +    target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
> +    set_sigmask(&host_set);
> +
> +    if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
> +        goto badframe;
> +    }
> +
> +    if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
> +        goto badframe;
> +
> +#if 0
> +    /* Send SIGTRAP if we're single-stepping */
> +    if (ptrace_cancel_bpt(current))
> +        send_sig(SIGTRAP, current, 1);
> +#endif
> +    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;
> +}
> +
> +static long do_rt_sigreturn_v2(CPUARMState *env)
> +{
> +    abi_ulong frame_addr;
> +    struct rt_sigframe_v2 *frame = NULL;
> +
> +    /*
> +     * Since we stacked the signal on a 64-bit boundary,
> +     * then 'sp' should be word aligned here.  If it's
> +     * not, then the user is trying to mess with us.
> +     */
> +    frame_addr = env->regs[13];
> +    trace_user_do_rt_sigreturn(env, frame_addr);
> +    if (frame_addr & 7) {
> +        goto badframe;
> +    }
> +
> +    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> +        goto badframe;
> +    }
> +
> +    if (do_sigframe_return_v2(env,
> +                              frame_addr
> +                              + offsetof(struct rt_sigframe_v2, uc),
> +                              &frame->uc)) {
> +        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;
> +}
> +
> +long do_rt_sigreturn(CPUARMState *env)
> +{
> +    if (get_osversion() >= 0x020612) {
> +        return do_rt_sigreturn_v2(env);
> +    } else {
> +        return do_rt_sigreturn_v1(env);
> +    }
> +}
> diff --git a/linux-user/arm/target_signal.h b/linux-user/arm/target_signal.h
> index cbbeb09f4d..4b542c324f 100644
> --- a/linux-user/arm/target_signal.h
> +++ b/linux-user/arm/target_signal.h
> @@ -26,5 +26,9 @@ static inline abi_ulong get_sp_from_cpustate(CPUARMState *state)
>     return state->regs[13];
>  }
>
> -
> +void setup_frame(int usig, struct target_sigaction *ka,
> +                 target_sigset_t *set, CPUARMState *regs);
> +void setup_rt_frame(int usig, struct target_sigaction *ka,
> +                    target_siginfo_t *info,
> +                    target_sigset_t *set, CPUARMState *env);
>  #endif /* ARM_TARGET_SIGNAL_H */
> diff --git a/linux-user/signal.c b/linux-user/signal.c
> index 2b05d7951b..38ebba9cf6 100644
> --- a/linux-user/signal.c
> +++ b/linux-user/signal.c
> @@ -1383,757 +1383,6 @@ badframe:
>      return -TARGET_QEMU_ESIGRETURN;
>  }
>
> -#elif defined(TARGET_ARM) && !defined(TARGET_AARCH64)
> -
> -struct target_sigcontext {
> -    abi_ulong trap_no;
> -    abi_ulong error_code;
> -    abi_ulong oldmask;
> -    abi_ulong arm_r0;
> -    abi_ulong arm_r1;
> -    abi_ulong arm_r2;
> -    abi_ulong arm_r3;
> -    abi_ulong arm_r4;
> -    abi_ulong arm_r5;
> -    abi_ulong arm_r6;
> -    abi_ulong arm_r7;
> -    abi_ulong arm_r8;
> -    abi_ulong arm_r9;
> -    abi_ulong arm_r10;
> -    abi_ulong arm_fp;
> -    abi_ulong arm_ip;
> -    abi_ulong arm_sp;
> -    abi_ulong arm_lr;
> -    abi_ulong arm_pc;
> -    abi_ulong arm_cpsr;
> -    abi_ulong fault_address;
> -};
> -
> -struct target_ucontext_v1 {
> -    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_ucontext_v2 {
> -    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 */
> -    char __unused[128 - sizeof(target_sigset_t)];
> -    abi_ulong tuc_regspace[128] __attribute__((__aligned__(8)));
> -};
> -
> -struct target_user_vfp {
> -    uint64_t fpregs[32];
> -    abi_ulong fpscr;
> -};
> -
> -struct target_user_vfp_exc {
> -    abi_ulong fpexc;
> -    abi_ulong fpinst;
> -    abi_ulong fpinst2;
> -};
> -
> -struct target_vfp_sigframe {
> -    abi_ulong magic;
> -    abi_ulong size;
> -    struct target_user_vfp ufp;
> -    struct target_user_vfp_exc ufp_exc;
> -} __attribute__((__aligned__(8)));
> -
> -struct target_iwmmxt_sigframe {
> -    abi_ulong magic;
> -    abi_ulong size;
> -    uint64_t regs[16];
> -    /* Note that not all the coprocessor control registers are stored here */
> -    uint32_t wcssf;
> -    uint32_t wcasf;
> -    uint32_t wcgr0;
> -    uint32_t wcgr1;
> -    uint32_t wcgr2;
> -    uint32_t wcgr3;
> -} __attribute__((__aligned__(8)));
> -
> -#define TARGET_VFP_MAGIC 0x56465001
> -#define TARGET_IWMMXT_MAGIC 0x12ef842a
> -
> -struct sigframe_v1
> -{
> -    struct target_sigcontext sc;
> -    abi_ulong extramask[TARGET_NSIG_WORDS-1];
> -    abi_ulong retcode;
> -};
> -
> -struct sigframe_v2
> -{
> -    struct target_ucontext_v2 uc;
> -    abi_ulong retcode;
> -};
> -
> -struct rt_sigframe_v1
> -{
> -    abi_ulong pinfo;
> -    abi_ulong puc;
> -    struct target_siginfo info;
> -    struct target_ucontext_v1 uc;
> -    abi_ulong retcode;
> -};
> -
> -struct rt_sigframe_v2
> -{
> -    struct target_siginfo info;
> -    struct target_ucontext_v2 uc;
> -    abi_ulong retcode;
> -};
> -
> -#define TARGET_CONFIG_CPU_32 1
> -
> -/*
> - * For ARM syscalls, we encode the syscall number into the instruction.
> - */
> -#define SWI_SYS_SIGRETURN	(0xef000000|(TARGET_NR_sigreturn + ARM_SYSCALL_BASE))
> -#define SWI_SYS_RT_SIGRETURN	(0xef000000|(TARGET_NR_rt_sigreturn + ARM_SYSCALL_BASE))
> -
> -/*
> - * For Thumb syscalls, we pass the syscall number via r7.  We therefore
> - * need two 16-bit instructions.
> - */
> -#define SWI_THUMB_SIGRETURN	(0xdf00 << 16 | 0x2700 | (TARGET_NR_sigreturn))
> -#define SWI_THUMB_RT_SIGRETURN	(0xdf00 << 16 | 0x2700 | (TARGET_NR_rt_sigreturn))
> -
> -static const abi_ulong retcodes[4] = {
> -	SWI_SYS_SIGRETURN,	SWI_THUMB_SIGRETURN,
> -	SWI_SYS_RT_SIGRETURN,	SWI_THUMB_RT_SIGRETURN
> -};
> -
> -
> -static inline int valid_user_regs(CPUARMState *regs)
> -{
> -    return 1;
> -}
> -
> -static void
> -setup_sigcontext(struct target_sigcontext *sc, /*struct _fpstate *fpstate,*/
> -                 CPUARMState *env, abi_ulong mask)
> -{
> -    __put_user(env->regs[0], &sc->arm_r0);
> -    __put_user(env->regs[1], &sc->arm_r1);
> -    __put_user(env->regs[2], &sc->arm_r2);
> -    __put_user(env->regs[3], &sc->arm_r3);
> -    __put_user(env->regs[4], &sc->arm_r4);
> -    __put_user(env->regs[5], &sc->arm_r5);
> -    __put_user(env->regs[6], &sc->arm_r6);
> -    __put_user(env->regs[7], &sc->arm_r7);
> -    __put_user(env->regs[8], &sc->arm_r8);
> -    __put_user(env->regs[9], &sc->arm_r9);
> -    __put_user(env->regs[10], &sc->arm_r10);
> -    __put_user(env->regs[11], &sc->arm_fp);
> -    __put_user(env->regs[12], &sc->arm_ip);
> -    __put_user(env->regs[13], &sc->arm_sp);
> -    __put_user(env->regs[14], &sc->arm_lr);
> -    __put_user(env->regs[15], &sc->arm_pc);
> -#ifdef TARGET_CONFIG_CPU_32
> -    __put_user(cpsr_read(env), &sc->arm_cpsr);
> -#endif
> -
> -    __put_user(/* current->thread.trap_no */ 0, &sc->trap_no);
> -    __put_user(/* current->thread.error_code */ 0, &sc->error_code);
> -    __put_user(/* current->thread.address */ 0, &sc->fault_address);
> -    __put_user(mask, &sc->oldmask);
> -}
> -
> -static inline abi_ulong
> -get_sigframe(struct target_sigaction *ka, CPUARMState *regs, int framesize)
> -{
> -    unsigned long sp = regs->regs[13];
> -
> -    /*
> -     * This is the X/Open sanctioned signal stack switching.
> -     */
> -    if ((ka->sa_flags & TARGET_SA_ONSTACK) && !sas_ss_flags(sp)) {
> -        sp = target_sigaltstack_used.ss_sp + target_sigaltstack_used.ss_size;
> -    }
> -    /*
> -     * ATPCS B01 mandates 8-byte alignment
> -     */
> -    return (sp - framesize) & ~7;
> -}
> -
> -static void
> -setup_return(CPUARMState *env, struct target_sigaction *ka,
> -             abi_ulong *rc, abi_ulong frame_addr, int usig, abi_ulong rc_addr)
> -{
> -    abi_ulong handler = ka->_sa_handler;
> -    abi_ulong retcode;
> -    int thumb = handler & 1;
> -    uint32_t cpsr = cpsr_read(env);
> -
> -    cpsr &= ~CPSR_IT;
> -    if (thumb) {
> -        cpsr |= CPSR_T;
> -    } else {
> -        cpsr &= ~CPSR_T;
> -    }
> -
> -    if (ka->sa_flags & TARGET_SA_RESTORER) {
> -        retcode = ka->sa_restorer;
> -    } else {
> -        unsigned int idx = thumb;
> -
> -        if (ka->sa_flags & TARGET_SA_SIGINFO) {
> -            idx += 2;
> -        }
> -
> -        __put_user(retcodes[idx], rc);
> -
> -        retcode = rc_addr + thumb;
> -    }
> -
> -    env->regs[0] = usig;
> -    env->regs[13] = frame_addr;
> -    env->regs[14] = retcode;
> -    env->regs[15] = handler & (thumb ? ~1 : ~3);
> -    cpsr_write(env, cpsr, CPSR_IT | CPSR_T, CPSRWriteByInstr);
> -}
> -
> -static abi_ulong *setup_sigframe_v2_vfp(abi_ulong *regspace, CPUARMState *env)
> -{
> -    int i;
> -    struct target_vfp_sigframe *vfpframe;
> -    vfpframe = (struct target_vfp_sigframe *)regspace;
> -    __put_user(TARGET_VFP_MAGIC, &vfpframe->magic);
> -    __put_user(sizeof(*vfpframe), &vfpframe->size);
> -    for (i = 0; i < 32; i++) {
> -        __put_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
> -    }
> -    __put_user(vfp_get_fpscr(env), &vfpframe->ufp.fpscr);
> -    __put_user(env->vfp.xregs[ARM_VFP_FPEXC], &vfpframe->ufp_exc.fpexc);
> -    __put_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
> -    __put_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
> -    return (abi_ulong*)(vfpframe+1);
> -}
> -
> -static abi_ulong *setup_sigframe_v2_iwmmxt(abi_ulong *regspace,
> -                                           CPUARMState *env)
> -{
> -    int i;
> -    struct target_iwmmxt_sigframe *iwmmxtframe;
> -    iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
> -    __put_user(TARGET_IWMMXT_MAGIC, &iwmmxtframe->magic);
> -    __put_user(sizeof(*iwmmxtframe), &iwmmxtframe->size);
> -    for (i = 0; i < 16; i++) {
> -        __put_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
> -    }
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
> -    __put_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
> -    return (abi_ulong*)(iwmmxtframe+1);
> -}
> -
> -static void setup_sigframe_v2(struct target_ucontext_v2 *uc,
> -                              target_sigset_t *set, CPUARMState *env)
> -{
> -    struct target_sigaltstack stack;
> -    int i;
> -    abi_ulong *regspace;
> -
> -    /* Clear all the bits of the ucontext we don't use.  */
> -    memset(uc, 0, offsetof(struct target_ucontext_v2, tuc_mcontext));
> -
> -    memset(&stack, 0, sizeof(stack));
> -    __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
> -    __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
> -    __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
> -    memcpy(&uc->tuc_stack, &stack, sizeof(stack));
> -
> -    setup_sigcontext(&uc->tuc_mcontext, env, set->sig[0]);
> -    /* Save coprocessor signal frame.  */
> -    regspace = uc->tuc_regspace;
> -    if (arm_feature(env, ARM_FEATURE_VFP)) {
> -        regspace = setup_sigframe_v2_vfp(regspace, env);
> -    }
> -    if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
> -        regspace = setup_sigframe_v2_iwmmxt(regspace, env);
> -    }
> -
> -    /* Write terminating magic word */
> -    __put_user(0, regspace);
> -
> -    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
> -        __put_user(set->sig[i], &uc->tuc_sigmask.sig[i]);
> -    }
> -}
> -
> -/* compare linux/arch/arm/kernel/signal.c:setup_frame() */
> -static void setup_frame_v1(int usig, struct target_sigaction *ka,
> -                           target_sigset_t *set, CPUARMState *regs)
> -{
> -    struct sigframe_v1 *frame;
> -    abi_ulong frame_addr = get_sigframe(ka, regs, sizeof(*frame));
> -    int i;
> -
> -    trace_user_setup_frame(regs, frame_addr);
> -    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> -        goto sigsegv;
> -    }
> -
> -    setup_sigcontext(&frame->sc, regs, set->sig[0]);
> -
> -    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
> -        __put_user(set->sig[i], &frame->extramask[i - 1]);
> -    }
> -
> -    setup_return(regs, ka, &frame->retcode, frame_addr, usig,
> -                 frame_addr + offsetof(struct sigframe_v1, retcode));
> -
> -    unlock_user_struct(frame, frame_addr, 1);
> -    return;
> -sigsegv:
> -    force_sigsegv(usig);
> -}
> -
> -static void setup_frame_v2(int usig, struct target_sigaction *ka,
> -                           target_sigset_t *set, CPUARMState *regs)
> -{
> -    struct sigframe_v2 *frame;
> -    abi_ulong 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 sigsegv;
> -    }
> -
> -    setup_sigframe_v2(&frame->uc, set, regs);
> -
> -    setup_return(regs, ka, &frame->retcode, frame_addr, usig,
> -                 frame_addr + offsetof(struct sigframe_v2, retcode));
> -
> -    unlock_user_struct(frame, frame_addr, 1);
> -    return;
> -sigsegv:
> -    force_sigsegv(usig);
> -}
> -
> -static void setup_frame(int usig, struct target_sigaction *ka,
> -                        target_sigset_t *set, CPUARMState *regs)
> -{
> -    if (get_osversion() >= 0x020612) {
> -        setup_frame_v2(usig, ka, set, regs);
> -    } else {
> -        setup_frame_v1(usig, ka, set, regs);
> -    }
> -}
> -
> -/* compare linux/arch/arm/kernel/signal.c:setup_rt_frame() */
> -static void setup_rt_frame_v1(int usig, struct target_sigaction *ka,
> -                              target_siginfo_t *info,
> -                              target_sigset_t *set, CPUARMState *env)
> -{
> -    struct rt_sigframe_v1 *frame;
> -    abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
> -    struct target_sigaltstack stack;
> -    int i;
> -    abi_ulong info_addr, uc_addr;
> -
> -    trace_user_setup_rt_frame(env, frame_addr);
> -    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> -        goto sigsegv;
> -    }
> -
> -    info_addr = frame_addr + offsetof(struct rt_sigframe_v1, info);
> -    __put_user(info_addr, &frame->pinfo);
> -    uc_addr = frame_addr + offsetof(struct rt_sigframe_v1, uc);
> -    __put_user(uc_addr, &frame->puc);
> -    tswap_siginfo(&frame->info, info);
> -
> -    /* Clear all the bits of the ucontext we don't use.  */
> -    memset(&frame->uc, 0, offsetof(struct target_ucontext_v1, tuc_mcontext));
> -
> -    memset(&stack, 0, sizeof(stack));
> -    __put_user(target_sigaltstack_used.ss_sp, &stack.ss_sp);
> -    __put_user(target_sigaltstack_used.ss_size, &stack.ss_size);
> -    __put_user(sas_ss_flags(get_sp_from_cpustate(env)), &stack.ss_flags);
> -    memcpy(&frame->uc.tuc_stack, &stack, sizeof(stack));
> -
> -    setup_sigcontext(&frame->uc.tuc_mcontext, env, set->sig[0]);
> -    for(i = 0; i < TARGET_NSIG_WORDS; i++) {
> -        __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]);
> -    }
> -
> -    setup_return(env, ka, &frame->retcode, frame_addr, usig,
> -                 frame_addr + offsetof(struct rt_sigframe_v1, retcode));
> -
> -    env->regs[1] = info_addr;
> -    env->regs[2] = uc_addr;
> -
> -    unlock_user_struct(frame, frame_addr, 1);
> -    return;
> -sigsegv:
> -    force_sigsegv(usig);
> -}
> -
> -static void setup_rt_frame_v2(int usig, struct target_sigaction *ka,
> -                              target_siginfo_t *info,
> -                              target_sigset_t *set, CPUARMState *env)
> -{
> -    struct rt_sigframe_v2 *frame;
> -    abi_ulong frame_addr = get_sigframe(ka, env, sizeof(*frame));
> -    abi_ulong info_addr, uc_addr;
> -
> -    trace_user_setup_rt_frame(env, frame_addr);
> -    if (!lock_user_struct(VERIFY_WRITE, frame, frame_addr, 0)) {
> -        goto sigsegv;
> -    }
> -
> -    info_addr = frame_addr + offsetof(struct rt_sigframe_v2, info);
> -    uc_addr = frame_addr + offsetof(struct rt_sigframe_v2, uc);
> -    tswap_siginfo(&frame->info, info);
> -
> -    setup_sigframe_v2(&frame->uc, set, env);
> -
> -    setup_return(env, ka, &frame->retcode, frame_addr, usig,
> -                 frame_addr + offsetof(struct rt_sigframe_v2, retcode));
> -
> -    env->regs[1] = info_addr;
> -    env->regs[2] = uc_addr;
> -
> -    unlock_user_struct(frame, frame_addr, 1);
> -    return;
> -sigsegv:
> -    force_sigsegv(usig);
> -}
> -
> -static void setup_rt_frame(int usig, struct target_sigaction *ka,
> -                           target_siginfo_t *info,
> -                           target_sigset_t *set, CPUARMState *env)
> -{
> -    if (get_osversion() >= 0x020612) {
> -        setup_rt_frame_v2(usig, ka, info, set, env);
> -    } else {
> -        setup_rt_frame_v1(usig, ka, info, set, env);
> -    }
> -}
> -
> -static int
> -restore_sigcontext(CPUARMState *env, struct target_sigcontext *sc)
> -{
> -    int err = 0;
> -    uint32_t cpsr;
> -
> -    __get_user(env->regs[0], &sc->arm_r0);
> -    __get_user(env->regs[1], &sc->arm_r1);
> -    __get_user(env->regs[2], &sc->arm_r2);
> -    __get_user(env->regs[3], &sc->arm_r3);
> -    __get_user(env->regs[4], &sc->arm_r4);
> -    __get_user(env->regs[5], &sc->arm_r5);
> -    __get_user(env->regs[6], &sc->arm_r6);
> -    __get_user(env->regs[7], &sc->arm_r7);
> -    __get_user(env->regs[8], &sc->arm_r8);
> -    __get_user(env->regs[9], &sc->arm_r9);
> -    __get_user(env->regs[10], &sc->arm_r10);
> -    __get_user(env->regs[11], &sc->arm_fp);
> -    __get_user(env->regs[12], &sc->arm_ip);
> -    __get_user(env->regs[13], &sc->arm_sp);
> -    __get_user(env->regs[14], &sc->arm_lr);
> -    __get_user(env->regs[15], &sc->arm_pc);
> -#ifdef TARGET_CONFIG_CPU_32
> -    __get_user(cpsr, &sc->arm_cpsr);
> -    cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr);
> -#endif
> -
> -    err |= !valid_user_regs(env);
> -
> -    return err;
> -}
> -
> -static long do_sigreturn_v1(CPUARMState *env)
> -{
> -    abi_ulong frame_addr;
> -    struct sigframe_v1 *frame = NULL;
> -    target_sigset_t set;
> -    sigset_t host_set;
> -    int i;
> -
> -    /*
> -     * Since we stacked the signal on a 64-bit boundary,
> -     * then 'sp' should be word aligned here.  If it's
> -     * not, then the user is trying to mess with us.
> -     */
> -    frame_addr = env->regs[13];
> -    trace_user_do_sigreturn(env, frame_addr);
> -    if (frame_addr & 7) {
> -        goto badframe;
> -    }
> -
> -    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> -        goto badframe;
> -    }
> -
> -    __get_user(set.sig[0], &frame->sc.oldmask);
> -    for(i = 1; i < TARGET_NSIG_WORDS; i++) {
> -        __get_user(set.sig[i], &frame->extramask[i - 1]);
> -    }
> -
> -    target_to_host_sigset_internal(&host_set, &set);
> -    set_sigmask(&host_set);
> -
> -    if (restore_sigcontext(env, &frame->sc)) {
> -        goto badframe;
> -    }
> -
> -#if 0
> -    /* Send SIGTRAP if we're single-stepping */
> -    if (ptrace_cancel_bpt(current))
> -        send_sig(SIGTRAP, current, 1);
> -#endif
> -    unlock_user_struct(frame, frame_addr, 0);
> -    return -TARGET_QEMU_ESIGRETURN;
> -
> -badframe:
> -    force_sig(TARGET_SIGSEGV);
> -    return -TARGET_QEMU_ESIGRETURN;
> -}
> -
> -static abi_ulong *restore_sigframe_v2_vfp(CPUARMState *env, abi_ulong *regspace)
> -{
> -    int i;
> -    abi_ulong magic, sz;
> -    uint32_t fpscr, fpexc;
> -    struct target_vfp_sigframe *vfpframe;
> -    vfpframe = (struct target_vfp_sigframe *)regspace;
> -
> -    __get_user(magic, &vfpframe->magic);
> -    __get_user(sz, &vfpframe->size);
> -    if (magic != TARGET_VFP_MAGIC || sz != sizeof(*vfpframe)) {
> -        return 0;
> -    }
> -    for (i = 0; i < 32; i++) {
> -        __get_user(*aa32_vfp_dreg(env, i), &vfpframe->ufp.fpregs[i]);
> -    }
> -    __get_user(fpscr, &vfpframe->ufp.fpscr);
> -    vfp_set_fpscr(env, fpscr);
> -    __get_user(fpexc, &vfpframe->ufp_exc.fpexc);
> -    /* Sanitise FPEXC: ensure VFP is enabled, FPINST2 is invalid
> -     * and the exception flag is cleared
> -     */
> -    fpexc |= (1 << 30);
> -    fpexc &= ~((1 << 31) | (1 << 28));
> -    env->vfp.xregs[ARM_VFP_FPEXC] = fpexc;
> -    __get_user(env->vfp.xregs[ARM_VFP_FPINST], &vfpframe->ufp_exc.fpinst);
> -    __get_user(env->vfp.xregs[ARM_VFP_FPINST2], &vfpframe->ufp_exc.fpinst2);
> -    return (abi_ulong*)(vfpframe + 1);
> -}
> -
> -static abi_ulong *restore_sigframe_v2_iwmmxt(CPUARMState *env,
> -                                             abi_ulong *regspace)
> -{
> -    int i;
> -    abi_ulong magic, sz;
> -    struct target_iwmmxt_sigframe *iwmmxtframe;
> -    iwmmxtframe = (struct target_iwmmxt_sigframe *)regspace;
> -
> -    __get_user(magic, &iwmmxtframe->magic);
> -    __get_user(sz, &iwmmxtframe->size);
> -    if (magic != TARGET_IWMMXT_MAGIC || sz != sizeof(*iwmmxtframe)) {
> -        return 0;
> -    }
> -    for (i = 0; i < 16; i++) {
> -        __get_user(env->iwmmxt.regs[i], &iwmmxtframe->regs[i]);
> -    }
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCSSF], &iwmmxtframe->wcssf);
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCASF], &iwmmxtframe->wcssf);
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR0], &iwmmxtframe->wcgr0);
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR1], &iwmmxtframe->wcgr1);
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR2], &iwmmxtframe->wcgr2);
> -    __get_user(env->vfp.xregs[ARM_IWMMXT_wCGR3], &iwmmxtframe->wcgr3);
> -    return (abi_ulong*)(iwmmxtframe + 1);
> -}
> -
> -static int do_sigframe_return_v2(CPUARMState *env,
> -                                 target_ulong context_addr,
> -                                 struct target_ucontext_v2 *uc)
> -{
> -    sigset_t host_set;
> -    abi_ulong *regspace;
> -
> -    target_to_host_sigset(&host_set, &uc->tuc_sigmask);
> -    set_sigmask(&host_set);
> -
> -    if (restore_sigcontext(env, &uc->tuc_mcontext))
> -        return 1;
> -
> -    /* Restore coprocessor signal frame */
> -    regspace = uc->tuc_regspace;
> -    if (arm_feature(env, ARM_FEATURE_VFP)) {
> -        regspace = restore_sigframe_v2_vfp(env, regspace);
> -        if (!regspace) {
> -            return 1;
> -        }
> -    }
> -    if (arm_feature(env, ARM_FEATURE_IWMMXT)) {
> -        regspace = restore_sigframe_v2_iwmmxt(env, regspace);
> -        if (!regspace) {
> -            return 1;
> -        }
> -    }
> -
> -    if (do_sigaltstack(context_addr
> -                       + offsetof(struct target_ucontext_v2, tuc_stack),
> -                       0, get_sp_from_cpustate(env)) == -EFAULT) {
> -        return 1;
> -    }
> -
> -#if 0
> -    /* Send SIGTRAP if we're single-stepping */
> -    if (ptrace_cancel_bpt(current))
> -        send_sig(SIGTRAP, current, 1);
> -#endif
> -
> -    return 0;
> -}
> -
> -static long do_sigreturn_v2(CPUARMState *env)
> -{
> -    abi_ulong frame_addr;
> -    struct sigframe_v2 *frame = NULL;
> -
> -    /*
> -     * Since we stacked the signal on a 64-bit boundary,
> -     * then 'sp' should be word aligned here.  If it's
> -     * not, then the user is trying to mess with us.
> -     */
> -    frame_addr = env->regs[13];
> -    trace_user_do_sigreturn(env, frame_addr);
> -    if (frame_addr & 7) {
> -        goto badframe;
> -    }
> -
> -    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> -        goto badframe;
> -    }
> -
> -    if (do_sigframe_return_v2(env,
> -                              frame_addr
> -                              + offsetof(struct sigframe_v2, uc),
> -                              &frame->uc)) {
> -        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;
> -}
> -
> -long do_sigreturn(CPUARMState *env)
> -{
> -    if (get_osversion() >= 0x020612) {
> -        return do_sigreturn_v2(env);
> -    } else {
> -        return do_sigreturn_v1(env);
> -    }
> -}
> -
> -static long do_rt_sigreturn_v1(CPUARMState *env)
> -{
> -    abi_ulong frame_addr;
> -    struct rt_sigframe_v1 *frame = NULL;
> -    sigset_t host_set;
> -
> -    /*
> -     * Since we stacked the signal on a 64-bit boundary,
> -     * then 'sp' should be word aligned here.  If it's
> -     * not, then the user is trying to mess with us.
> -     */
> -    frame_addr = env->regs[13];
> -    trace_user_do_rt_sigreturn(env, frame_addr);
> -    if (frame_addr & 7) {
> -        goto badframe;
> -    }
> -
> -    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> -        goto badframe;
> -    }
> -
> -    target_to_host_sigset(&host_set, &frame->uc.tuc_sigmask);
> -    set_sigmask(&host_set);
> -
> -    if (restore_sigcontext(env, &frame->uc.tuc_mcontext)) {
> -        goto badframe;
> -    }
> -
> -    if (do_sigaltstack(frame_addr + offsetof(struct rt_sigframe_v1, uc.tuc_stack), 0, get_sp_from_cpustate(env)) == -EFAULT)
> -        goto badframe;
> -
> -#if 0
> -    /* Send SIGTRAP if we're single-stepping */
> -    if (ptrace_cancel_bpt(current))
> -        send_sig(SIGTRAP, current, 1);
> -#endif
> -    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;
> -}
> -
> -static long do_rt_sigreturn_v2(CPUARMState *env)
> -{
> -    abi_ulong frame_addr;
> -    struct rt_sigframe_v2 *frame = NULL;
> -
> -    /*
> -     * Since we stacked the signal on a 64-bit boundary,
> -     * then 'sp' should be word aligned here.  If it's
> -     * not, then the user is trying to mess with us.
> -     */
> -    frame_addr = env->regs[13];
> -    trace_user_do_rt_sigreturn(env, frame_addr);
> -    if (frame_addr & 7) {
> -        goto badframe;
> -    }
> -
> -    if (!lock_user_struct(VERIFY_READ, frame, frame_addr, 1)) {
> -        goto badframe;
> -    }
> -
> -    if (do_sigframe_return_v2(env,
> -                              frame_addr
> -                              + offsetof(struct rt_sigframe_v2, uc),
> -                              &frame->uc)) {
> -        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;
> -}
> -
> -long do_rt_sigreturn(CPUARMState *env)
> -{
> -    if (get_osversion() >= 0x020612) {
> -        return do_rt_sigreturn_v2(env);
> -    } else {
> -        return do_rt_sigreturn_v1(env);
> -    }
> -}
> -
>  #elif defined(TARGET_SPARC)
>
>  #define __SUNOS_MAXWIN   31


--
Alex Bennée