Archipelago » qemu

/* This is the Linux kernel elf-loading code, ported into user space */

#include <sys/time.h>

#include <sys/param.h>

#include <stdio.h>

#include <sys/types.h>

#include <fcntl.h>

#include <errno.h>

#include <unistd.h>

#include <sys/mman.h>

#include <sys/resource.h>

#include <stdlib.h>

#include <string.h>

#include <time.h>

#include "qemu.h"

#include "disas/disas.h"

#ifdef _ARCH_PPC64

#undef ARCH_DLINFO

#undef ELF_PLATFORM

#undef ELF_HWCAP

#undef ELF_CLASS

#undef ELF_DATA

#undef ELF_ARCH

#endif

#define ELF_OSABI   ELFOSABI_SYSV

/* from personality.h */

/*

 * Flags for bug emulation.

 *

 * These occupy the top three bytes.

 */

enum {

    ADDR_NO_RANDOMIZE = 0x0040000,      /* disable randomization of VA space */

    FDPIC_FUNCPTRS =    0x0080000,      /* userspace function ptrs point to

                                           descriptors (signal handling) */

    MMAP_PAGE_ZERO =    0x0100000,

    ADDR_COMPAT_LAYOUT = 0x0200000,

    READ_IMPLIES_EXEC = 0x0400000,

    ADDR_LIMIT_32BIT =  0x0800000,

    SHORT_INODE =       0x1000000,

    WHOLE_SECONDS =     0x2000000,

    STICKY_TIMEOUTS =   0x4000000,

    ADDR_LIMIT_3GB =    0x8000000,

};

/*

 * Personality types.

 *

 * These go in the low byte.  Avoid using the top bit, it will

 * conflict with error returns.

 */

enum {

    PER_LINUX =         0x0000,

    PER_LINUX_32BIT =   0x0000 | ADDR_LIMIT_32BIT,

    PER_LINUX_FDPIC =   0x0000 | FDPIC_FUNCPTRS,

    PER_SVR4 =          0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,

    PER_SVR3 =          0x0002 | STICKY_TIMEOUTS | SHORT_INODE,

    PER_SCOSVR3 =       0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE,

    PER_OSR5 =          0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS,

    PER_WYSEV386 =      0x0004 | STICKY_TIMEOUTS | SHORT_INODE,

    PER_ISCR4 =         0x0005 | STICKY_TIMEOUTS,

    PER_BSD =           0x0006,

    PER_SUNOS =         0x0006 | STICKY_TIMEOUTS,

    PER_XENIX =         0x0007 | STICKY_TIMEOUTS | SHORT_INODE,

    PER_LINUX32 =       0x0008,

    PER_LINUX32_3GB =   0x0008 | ADDR_LIMIT_3GB,

    PER_IRIX32 =        0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */

    PER_IRIXN32 =       0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */

    PER_IRIX64 =        0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */

    PER_RISCOS =        0x000c,

    PER_SOLARIS =       0x000d | STICKY_TIMEOUTS,

    PER_UW7 =           0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO,

    PER_OSF4 =          0x000f,                  /* OSF/1 v4 */

    PER_HPUX =          0x0010,

    PER_MASK =          0x00ff,

};

/*

 * Return the base personality without flags.

 */

#define personality(pers)       (pers & PER_MASK)

/* this flag is uneffective under linux too, should be deleted */

#ifndef MAP_DENYWRITE

#define MAP_DENYWRITE 0

#endif

/* should probably go in elf.h */

#ifndef ELIBBAD

#define ELIBBAD 80

#endif

#ifdef TARGET_WORDS_BIGENDIAN

#define ELF_DATA        ELFDATA2MSB

#else

#define ELF_DATA        ELFDATA2LSB

#endif

typedef target_ulong    target_elf_greg_t;

#ifdef USE_UID16

typedef target_ushort   target_uid_t;

typedef target_ushort   target_gid_t;

#else

typedef target_uint     target_uid_t;

typedef target_uint     target_gid_t;

#endif

typedef target_int      target_pid_t;

#ifdef TARGET_I386

#define ELF_PLATFORM get_elf_platform()

static const char *get_elf_platform(void)

{

    static char elf_platform[] = "i386";

    int family = (thread_env->cpuid_version >> 8) & 0xff;

    if (family > 6)

        family = 6;

    if (family >= 3)

        elf_platform[1] = '0' + family;

    return elf_platform;

}

#define ELF_HWCAP get_elf_hwcap()

static uint32_t get_elf_hwcap(void)

{

    return thread_env->cpuid_features;

}

#ifdef TARGET_X86_64

#define ELF_START_MMAP 0x2aaaaab000ULL

#define elf_check_arch(x) ( ((x) == ELF_ARCH) )

#define ELF_CLASS      ELFCLASS64

#define ELF_ARCH       EM_X86_64

static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)

{

    regs->rax = 0;

    regs->rsp = infop->start_stack;

    regs->rip = infop->entry;

}

#define ELF_NREG    27

typedef target_elf_greg_t  target_elf_gregset_t[ELF_NREG];

/*

 * Note that ELF_NREG should be 29 as there should be place for

 * TRAPNO and ERR "registers" as well but linux doesn't dump

 * those.

 *

 * See linux kernel: arch/x86/include/asm/elf.h

 */

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)

{

    (*regs)[0] = env->regs[15];

    (*regs)[1] = env->regs[14];

    (*regs)[2] = env->regs[13];

    (*regs)[3] = env->regs[12];

    (*regs)[4] = env->regs[R_EBP];

    (*regs)[5] = env->regs[R_EBX];

    (*regs)[6] = env->regs[11];

    (*regs)[7] = env->regs[10];

    (*regs)[8] = env->regs[9];

    (*regs)[9] = env->regs[8];

    (*regs)[10] = env->regs[R_EAX];

    (*regs)[11] = env->regs[R_ECX];

    (*regs)[12] = env->regs[R_EDX];

    (*regs)[13] = env->regs[R_ESI];

    (*regs)[14] = env->regs[R_EDI];

    (*regs)[15] = env->regs[R_EAX]; /* XXX */

    (*regs)[16] = env->eip;

    (*regs)[17] = env->segs[R_CS].selector & 0xffff;

    (*regs)[18] = env->eflags;

    (*regs)[19] = env->regs[R_ESP];

    (*regs)[20] = env->segs[R_SS].selector & 0xffff;

    (*regs)[21] = env->segs[R_FS].selector & 0xffff;

    (*regs)[22] = env->segs[R_GS].selector & 0xffff;

    (*regs)[23] = env->segs[R_DS].selector & 0xffff;

    (*regs)[24] = env->segs[R_ES].selector & 0xffff;

    (*regs)[25] = env->segs[R_FS].selector & 0xffff;

    (*regs)[26] = env->segs[R_GS].selector & 0xffff;

}

#else

#define ELF_START_MMAP 0x80000000

/*

 * This is used to ensure we don't load something for the wrong architecture.

 */

#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) )

/*

 * These are used to set parameters in the core dumps.

 */

#define ELF_CLASS       ELFCLASS32

#define ELF_ARCH        EM_386

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->esp = infop->start_stack;

    regs->eip = infop->entry;

    /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program

       starts %edx contains a pointer to a function which might be

       registered using `atexit'.  This provides a mean for the

       dynamic linker to call DT_FINI functions for shared libraries

       that have been loaded before the code runs.

       A value of 0 tells we have no such handler.  */

    regs->edx = 0;

}

#define ELF_NREG    17

typedef target_elf_greg_t  target_elf_gregset_t[ELF_NREG];

/*

 * Note that ELF_NREG should be 19 as there should be place for

 * TRAPNO and ERR "registers" as well but linux doesn't dump

 * those.

 *

 * See linux kernel: arch/x86/include/asm/elf.h

 */

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env)

{

    (*regs)[0] = env->regs[R_EBX];

    (*regs)[1] = env->regs[R_ECX];

    (*regs)[2] = env->regs[R_EDX];

    (*regs)[3] = env->regs[R_ESI];

    (*regs)[4] = env->regs[R_EDI];

    (*regs)[5] = env->regs[R_EBP];

    (*regs)[6] = env->regs[R_EAX];

    (*regs)[7] = env->segs[R_DS].selector & 0xffff;

    (*regs)[8] = env->segs[R_ES].selector & 0xffff;

    (*regs)[9] = env->segs[R_FS].selector & 0xffff;

    (*regs)[10] = env->segs[R_GS].selector & 0xffff;

    (*regs)[11] = env->regs[R_EAX]; /* XXX */

    (*regs)[12] = env->eip;

    (*regs)[13] = env->segs[R_CS].selector & 0xffff;

    (*regs)[14] = env->eflags;

    (*regs)[15] = env->regs[R_ESP];

    (*regs)[16] = env->segs[R_SS].selector & 0xffff;

}

#endif

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE       4096

#endif

#ifdef TARGET_ARM

#define ELF_START_MMAP 0x80000000

#define elf_check_arch(x) ( (x) == EM_ARM )

#define ELF_CLASS       ELFCLASS32

#define ELF_ARCH        EM_ARM

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    abi_long stack = infop->start_stack;

    memset(regs, 0, sizeof(*regs));

    regs->ARM_cpsr = 0x10;

    if (infop->entry & 1)

        regs->ARM_cpsr |= CPSR_T;

    regs->ARM_pc = infop->entry & 0xfffffffe;

    regs->ARM_sp = infop->start_stack;

    /* FIXME - what to for failure of get_user()? */

    get_user_ual(regs->ARM_r2, stack + 8); /* envp */

    get_user_ual(regs->ARM_r1, stack + 4); /* envp */

    /* XXX: it seems that r0 is zeroed after ! */

    regs->ARM_r0 = 0;

    /* For uClinux PIC binaries.  */

    /* XXX: Linux does this only on ARM with no MMU (do we care ?) */

    regs->ARM_r10 = infop->start_data;

}

#define ELF_NREG    18

typedef target_elf_greg_t  target_elf_gregset_t[ELF_NREG];

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env)

{

    (*regs)[0] = tswapl(env->regs[0]);

    (*regs)[1] = tswapl(env->regs[1]);

    (*regs)[2] = tswapl(env->regs[2]);

    (*regs)[3] = tswapl(env->regs[3]);

    (*regs)[4] = tswapl(env->regs[4]);

    (*regs)[5] = tswapl(env->regs[5]);

    (*regs)[6] = tswapl(env->regs[6]);

    (*regs)[7] = tswapl(env->regs[7]);

    (*regs)[8] = tswapl(env->regs[8]);

    (*regs)[9] = tswapl(env->regs[9]);

    (*regs)[10] = tswapl(env->regs[10]);

    (*regs)[11] = tswapl(env->regs[11]);

    (*regs)[12] = tswapl(env->regs[12]);

    (*regs)[13] = tswapl(env->regs[13]);

    (*regs)[14] = tswapl(env->regs[14]);

    (*regs)[15] = tswapl(env->regs[15]);

    (*regs)[16] = tswapl(cpsr_read((CPUARMState *)env));

    (*regs)[17] = tswapl(env->regs[0]); /* XXX */

}

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE       4096

enum

{

    ARM_HWCAP_ARM_SWP       = 1 << 0,

    ARM_HWCAP_ARM_HALF      = 1 << 1,

    ARM_HWCAP_ARM_THUMB     = 1 << 2,

    ARM_HWCAP_ARM_26BIT     = 1 << 3,

    ARM_HWCAP_ARM_FAST_MULT = 1 << 4,

    ARM_HWCAP_ARM_FPA       = 1 << 5,

    ARM_HWCAP_ARM_VFP       = 1 << 6,

    ARM_HWCAP_ARM_EDSP      = 1 << 7,

    ARM_HWCAP_ARM_JAVA      = 1 << 8,

    ARM_HWCAP_ARM_IWMMXT    = 1 << 9,

    ARM_HWCAP_ARM_THUMBEE   = 1 << 10,

    ARM_HWCAP_ARM_NEON      = 1 << 11,

    ARM_HWCAP_ARM_VFPv3     = 1 << 12,

    ARM_HWCAP_ARM_VFPv3D16  = 1 << 13,

};

#define TARGET_HAS_VALIDATE_GUEST_SPACE

/* Return 1 if the proposed guest space is suitable for the guest.

 * Return 0 if the proposed guest space isn't suitable, but another

 * address space should be tried.

 * Return -1 if there is no way the proposed guest space can be

 * valid regardless of the base.

 * The guest code may leave a page mapped and populate it if the

 * address is suitable.

 */

static int validate_guest_space(unsigned long guest_base,

                                unsigned long guest_size)

{

    unsigned long real_start, test_page_addr;

    /* We need to check that we can force a fault on access to the

     * commpage at 0xffff0fxx

     */

    test_page_addr = guest_base + (0xffff0f00 & qemu_host_page_mask);

    /* If the commpage lies within the already allocated guest space,

     * then there is no way we can allocate it.

     */

    if (test_page_addr >= guest_base

        && test_page_addr <= (guest_base + guest_size)) {

        return -1;

    }

    /* Note it needs to be writeable to let us initialise it */

    real_start = (unsigned long)

                 mmap((void *)test_page_addr, qemu_host_page_size,

                     PROT_READ | PROT_WRITE,

                     MAP_ANONYMOUS | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);

    /* If we can't map it then try another address */

    if (real_start == -1ul) {

        return 0;

    }

    if (real_start != test_page_addr) {

        /* OS didn't put the page where we asked - unmap and reject */

        munmap((void *)real_start, qemu_host_page_size);

        return 0;

    }

    /* Leave the page mapped

     * Populate it (mmap should have left it all 0'd)

     */

    /* Kernel helper versions */

    __put_user(5, (uint32_t *)g2h(0xffff0ffcul));

    /* Now it's populated make it RO */

    if (mprotect((void *)test_page_addr, qemu_host_page_size, PROT_READ)) {

        perror("Protecting guest commpage");

        exit(-1);

    }

    return 1; /* All good */

}

#define ELF_HWCAP get_elf_hwcap()

static uint32_t get_elf_hwcap(void)

{

    CPUARMState *e = thread_env;

    uint32_t hwcaps = 0;

    hwcaps |= ARM_HWCAP_ARM_SWP;

    hwcaps |= ARM_HWCAP_ARM_HALF;

    hwcaps |= ARM_HWCAP_ARM_THUMB;

    hwcaps |= ARM_HWCAP_ARM_FAST_MULT;

    hwcaps |= ARM_HWCAP_ARM_FPA;

    /* probe for the extra features */

#define GET_FEATURE(feat, hwcap) \

    do {if (arm_feature(e, feat)) { hwcaps |= hwcap; } } while (0)

    GET_FEATURE(ARM_FEATURE_VFP, ARM_HWCAP_ARM_VFP);

    GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT);

    GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE);

    GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON);

    GET_FEATURE(ARM_FEATURE_VFP3, ARM_HWCAP_ARM_VFPv3);

    GET_FEATURE(ARM_FEATURE_VFP_FP16, ARM_HWCAP_ARM_VFPv3D16);

#undef GET_FEATURE

    return hwcaps;

}

#endif

#ifdef TARGET_UNICORE32

#define ELF_START_MMAP          0x80000000

#define elf_check_arch(x)       ((x) == EM_UNICORE32)

#define ELF_CLASS               ELFCLASS32

#define ELF_DATA                ELFDATA2LSB

#define ELF_ARCH                EM_UNICORE32

static inline void init_thread(struct target_pt_regs *regs,

        struct image_info *infop)

{

    abi_long stack = infop->start_stack;

    memset(regs, 0, sizeof(*regs));

    regs->UC32_REG_asr = 0x10;

    regs->UC32_REG_pc = infop->entry & 0xfffffffe;

    regs->UC32_REG_sp = infop->start_stack;

    /* FIXME - what to for failure of get_user()? */

    get_user_ual(regs->UC32_REG_02, stack + 8); /* envp */

    get_user_ual(regs->UC32_REG_01, stack + 4); /* envp */

    /* XXX: it seems that r0 is zeroed after ! */

    regs->UC32_REG_00 = 0;

}

#define ELF_NREG    34

typedef target_elf_greg_t  target_elf_gregset_t[ELF_NREG];

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUUniCore32State *env)

{

    (*regs)[0] = env->regs[0];

    (*regs)[1] = env->regs[1];

    (*regs)[2] = env->regs[2];

    (*regs)[3] = env->regs[3];

    (*regs)[4] = env->regs[4];

    (*regs)[5] = env->regs[5];

    (*regs)[6] = env->regs[6];

    (*regs)[7] = env->regs[7];

    (*regs)[8] = env->regs[8];

    (*regs)[9] = env->regs[9];

    (*regs)[10] = env->regs[10];

    (*regs)[11] = env->regs[11];

    (*regs)[12] = env->regs[12];

    (*regs)[13] = env->regs[13];

    (*regs)[14] = env->regs[14];

    (*regs)[15] = env->regs[15];

    (*regs)[16] = env->regs[16];

    (*regs)[17] = env->regs[17];

    (*regs)[18] = env->regs[18];

    (*regs)[19] = env->regs[19];

    (*regs)[20] = env->regs[20];

    (*regs)[21] = env->regs[21];

    (*regs)[22] = env->regs[22];

    (*regs)[23] = env->regs[23];

    (*regs)[24] = env->regs[24];

    (*regs)[25] = env->regs[25];

    (*regs)[26] = env->regs[26];

    (*regs)[27] = env->regs[27];

    (*regs)[28] = env->regs[28];

    (*regs)[29] = env->regs[29];

    (*regs)[30] = env->regs[30];

    (*regs)[31] = env->regs[31];

    (*regs)[32] = cpu_asr_read((CPUUniCore32State *)env);

    (*regs)[33] = env->regs[0]; /* XXX */

}

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE               4096

#define ELF_HWCAP                       (UC32_HWCAP_CMOV | UC32_HWCAP_UCF64)

#endif

#ifdef TARGET_SPARC

#ifdef TARGET_SPARC64

#define ELF_START_MMAP 0x80000000

#define ELF_HWCAP  (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \

                    | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9)

#ifndef TARGET_ABI32

#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS )

#else

#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC )

#endif

#define ELF_CLASS   ELFCLASS64

#define ELF_ARCH    EM_SPARCV9

#define STACK_BIAS              2047

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

#ifndef TARGET_ABI32

    regs->tstate = 0;

#endif

    regs->pc = infop->entry;

    regs->npc = regs->pc + 4;

    regs->y = 0;

#ifdef TARGET_ABI32

    regs->u_regs[14] = infop->start_stack - 16 * 4;

#else

    if (personality(infop->personality) == PER_LINUX32)

        regs->u_regs[14] = infop->start_stack - 16 * 4;

    else

        regs->u_regs[14] = infop->start_stack - 16 * 8 - STACK_BIAS;

#endif

}

#else

#define ELF_START_MMAP 0x80000000

#define ELF_HWCAP  (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \

                    | HWCAP_SPARC_MULDIV)

#define elf_check_arch(x) ( (x) == EM_SPARC )

#define ELF_CLASS   ELFCLASS32

#define ELF_ARCH    EM_SPARC

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->psr = 0;

    regs->pc = infop->entry;

    regs->npc = regs->pc + 4;

    regs->y = 0;

    regs->u_regs[14] = infop->start_stack - 16 * 4;

}

#endif

#endif

#ifdef TARGET_PPC

#define ELF_START_MMAP 0x80000000

#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)

#define elf_check_arch(x) ( (x) == EM_PPC64 )

#define ELF_CLASS       ELFCLASS64

#else

#define elf_check_arch(x) ( (x) == EM_PPC )

#define ELF_CLASS       ELFCLASS32

#endif

#define ELF_ARCH        EM_PPC

/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP).

   See arch/powerpc/include/asm/cputable.h.  */

enum {

    QEMU_PPC_FEATURE_32 = 0x80000000,

    QEMU_PPC_FEATURE_64 = 0x40000000,

    QEMU_PPC_FEATURE_601_INSTR = 0x20000000,

    QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000,

    QEMU_PPC_FEATURE_HAS_FPU = 0x08000000,

    QEMU_PPC_FEATURE_HAS_MMU = 0x04000000,

    QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000,

    QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000,

    QEMU_PPC_FEATURE_HAS_SPE = 0x00800000,

    QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000,

    QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000,

    QEMU_PPC_FEATURE_NO_TB = 0x00100000,

    QEMU_PPC_FEATURE_POWER4 = 0x00080000,

    QEMU_PPC_FEATURE_POWER5 = 0x00040000,

    QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000,

    QEMU_PPC_FEATURE_CELL = 0x00010000,

    QEMU_PPC_FEATURE_BOOKE = 0x00008000,

    QEMU_PPC_FEATURE_SMT = 0x00004000,

    QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000,

    QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000,

    QEMU_PPC_FEATURE_PA6T = 0x00000800,

    QEMU_PPC_FEATURE_HAS_DFP = 0x00000400,

    QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200,

    QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100,

    QEMU_PPC_FEATURE_HAS_VSX = 0x00000080,

    QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040,

    QEMU_PPC_FEATURE_TRUE_LE = 0x00000002,

    QEMU_PPC_FEATURE_PPC_LE = 0x00000001,

};

#define ELF_HWCAP get_elf_hwcap()

static uint32_t get_elf_hwcap(void)

{

    CPUPPCState *e = thread_env;

    uint32_t features = 0;

    /* We don't have to be terribly complete here; the high points are

       Altivec/FP/SPE support.  Anything else is just a bonus.  */

#define GET_FEATURE(flag, feature)                                      \

    do {if (e->insns_flags & flag) features |= feature; } while(0)

    GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64);

    GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU);

    GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC);

    GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE);

    GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE);

    GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE);

    GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE);

    GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC);

#undef GET_FEATURE

    return features;

}

/*

 * The requirements here are:

 * - keep the final alignment of sp (sp & 0xf)

 * - make sure the 32-bit value at the first 16 byte aligned position of

 *   AUXV is greater than 16 for glibc compatibility.

 *   AT_IGNOREPPC is used for that.

 * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC,

 *   even if DLINFO_ARCH_ITEMS goes to zero or is undefined.

 */

#define DLINFO_ARCH_ITEMS       5

#define ARCH_DLINFO                                     \

    do {                                                \

        NEW_AUX_ENT(AT_DCACHEBSIZE, 0x20);              \

        NEW_AUX_ENT(AT_ICACHEBSIZE, 0x20);              \

        NEW_AUX_ENT(AT_UCACHEBSIZE, 0);                 \

        /*                                              \

         * Now handle glibc compatibility.              \

         */                                             \

        NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);        \

        NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC);        \

    } while (0)

static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop)

{

    _regs->gpr[1] = infop->start_stack;

#if defined(TARGET_PPC64) && !defined(TARGET_ABI32)

    _regs->gpr[2] = ldq_raw(infop->entry + 8) + infop->load_bias;

    infop->entry = ldq_raw(infop->entry) + infop->load_bias;

#endif

    _regs->nip = infop->entry;

}

/* See linux kernel: arch/powerpc/include/asm/elf.h.  */

#define ELF_NREG 48

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env)

{

    int i;

    target_ulong ccr = 0;

    for (i = 0; i < ARRAY_SIZE(env->gpr); i++) {

        (*regs)[i] = tswapl(env->gpr[i]);

    }

    (*regs)[32] = tswapl(env->nip);

    (*regs)[33] = tswapl(env->msr);

    (*regs)[35] = tswapl(env->ctr);

    (*regs)[36] = tswapl(env->lr);

    (*regs)[37] = tswapl(env->xer);

    for (i = 0; i < ARRAY_SIZE(env->crf); i++) {

        ccr |= env->crf[i] << (32 - ((i + 1) * 4));

    }

    (*regs)[38] = tswapl(ccr);

}

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE       4096

#endif

#ifdef TARGET_MIPS

#define ELF_START_MMAP 0x80000000

#define elf_check_arch(x) ( (x) == EM_MIPS )

#ifdef TARGET_MIPS64

#define ELF_CLASS   ELFCLASS64

#else

#define ELF_CLASS   ELFCLASS32

#endif

#define ELF_ARCH    EM_MIPS

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->cp0_status = 2 << CP0St_KSU;

    regs->cp0_epc = infop->entry;

    regs->regs[29] = infop->start_stack;

}

/* See linux kernel: arch/mips/include/asm/elf.h.  */

#define ELF_NREG 45

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];

/* See linux kernel: arch/mips/include/asm/reg.h.  */

enum {

#ifdef TARGET_MIPS64

    TARGET_EF_R0 = 0,

#else

    TARGET_EF_R0 = 6,

#endif

    TARGET_EF_R26 = TARGET_EF_R0 + 26,

    TARGET_EF_R27 = TARGET_EF_R0 + 27,

    TARGET_EF_LO = TARGET_EF_R0 + 32,

    TARGET_EF_HI = TARGET_EF_R0 + 33,

    TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,

    TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,

    TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,

    TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37

};

/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs.  */

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env)

{

    int i;

    for (i = 0; i < TARGET_EF_R0; i++) {

        (*regs)[i] = 0;

    }

    (*regs)[TARGET_EF_R0] = 0;

    for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {

        (*regs)[TARGET_EF_R0 + i] = tswapl(env->active_tc.gpr[i]);

    }

    (*regs)[TARGET_EF_R26] = 0;

    (*regs)[TARGET_EF_R27] = 0;

    (*regs)[TARGET_EF_LO] = tswapl(env->active_tc.LO[0]);

    (*regs)[TARGET_EF_HI] = tswapl(env->active_tc.HI[0]);

    (*regs)[TARGET_EF_CP0_EPC] = tswapl(env->active_tc.PC);

    (*regs)[TARGET_EF_CP0_BADVADDR] = tswapl(env->CP0_BadVAddr);

    (*regs)[TARGET_EF_CP0_STATUS] = tswapl(env->CP0_Status);

    (*regs)[TARGET_EF_CP0_CAUSE] = tswapl(env->CP0_Cause);

}

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE        4096

#endif /* TARGET_MIPS */

#ifdef TARGET_MICROBLAZE

#define ELF_START_MMAP 0x80000000

#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD)

#define ELF_CLASS   ELFCLASS32

#define ELF_ARCH    EM_MICROBLAZE

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->pc = infop->entry;

    regs->r1 = infop->start_stack;

}

#define ELF_EXEC_PAGESIZE        4096

#define USE_ELF_CORE_DUMP

#define ELF_NREG 38

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];

/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs.  */

static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env)

{

    int i, pos = 0;

    for (i = 0; i < 32; i++) {

        (*regs)[pos++] = tswapl(env->regs[i]);

    }

    for (i = 0; i < 6; i++) {

        (*regs)[pos++] = tswapl(env->sregs[i]);

    }

}

#endif /* TARGET_MICROBLAZE */

#ifdef TARGET_OPENRISC

#define ELF_START_MMAP 0x08000000

#define elf_check_arch(x) ((x) == EM_OPENRISC)

#define ELF_ARCH EM_OPENRISC

#define ELF_CLASS ELFCLASS32

#define ELF_DATA  ELFDATA2MSB

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    regs->pc = infop->entry;

    regs->gpr[1] = infop->start_stack;

}

#define USE_ELF_CORE_DUMP

#define ELF_EXEC_PAGESIZE 8192

/* See linux kernel arch/openrisc/include/asm/elf.h.  */

#define ELF_NREG 34 /* gprs and pc, sr */

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];

static void elf_core_copy_regs(target_elf_gregset_t *regs,

                               const CPUOpenRISCState *env)

{

    int i;

    for (i = 0; i < 32; i++) {

        (*regs)[i] = tswapl(env->gpr[i]);

    }

    (*regs)[32] = tswapl(env->pc);

    (*regs)[33] = tswapl(env->sr);

}

#define ELF_HWCAP 0

#define ELF_PLATFORM NULL

#endif /* TARGET_OPENRISC */

#ifdef TARGET_SH4

#define ELF_START_MMAP 0x80000000

#define elf_check_arch(x) ( (x) == EM_SH )

#define ELF_CLASS ELFCLASS32

#define ELF_ARCH  EM_SH

static inline void init_thread(struct target_pt_regs *regs,

                               struct image_info *infop)

{

    /* Check other registers XXXXX */

    regs->pc = infop->entry;

    regs->regs[15] = infop->start_stack;

}

/* See linux kernel: arch/sh/include/asm/elf.h.  */

#define ELF_NREG 23

typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG];

/* See linux kernel: arch/sh/include/asm/ptrace.h.  */

enum {

    TARGET_REG_PC = 16,

    TARGET_REG_PR = 17,

    TARGET_REG_SR = 18,

    TARGET_REG_GBR = 19,

    TARGET_REG_MACH = 20,

    TARGET_REG_MACL = 21,

    TARGET_REG_SYSCALL = 22

};

static inline void elf_core_copy_regs(target_elf_gregset_t *regs,

                                      const CPUSH4State *env)