Archipelago » qemu

#ifndef QEMU_H

#define QEMU_H

#include "thunk.h"

#include <signal.h>

#include <string.h>

#include "syscall_defs.h"

#include "cpu.h"

#include "syscall.h"

#include "gdbstub.h"

/* This struct is used to hold certain information about the image.

 * Basically, it replicates in user space what would be certain

 * task_struct fields in the kernel

 */

struct image_info {

        unsigned long        start_code;

        unsigned long        end_code;

        unsigned long   start_data;

        unsigned long        end_data;

        unsigned long        start_brk;

        unsigned long        brk;

        unsigned long        start_mmap;

        unsigned long        mmap;

        unsigned long        rss;

        unsigned long        start_stack;

        unsigned long        entry;

        target_ulong    code_offset;

        target_ulong    data_offset;

        char            **host_argv;

        int                personality;

};

#ifdef TARGET_I386

/* Information about the current linux thread */

struct vm86_saved_state {

    uint32_t eax; /* return code */

    uint32_t ebx;

    uint32_t ecx;

    uint32_t edx;

    uint32_t esi;

    uint32_t edi;

    uint32_t ebp;

    uint32_t esp;

    uint32_t eflags;

    uint32_t eip;

    uint16_t cs, ss, ds, es, fs, gs;

};

#endif

#ifdef TARGET_ARM

/* FPU emulator */

#include "nwfpe/fpa11.h"

#endif

/* NOTE: we force a big alignment so that the stack stored after is

   aligned too */

typedef struct TaskState {

    struct TaskState *next;

#ifdef TARGET_ARM

    /* FPA state */

    FPA11 fpa;

    /* Extra fields for semihosted binaries.  */

    uint32_t stack_base;

    uint32_t heap_base;

    uint32_t heap_limit;

    int swi_errno;

#endif

#ifdef TARGET_I386

    target_ulong target_v86;

    struct vm86_saved_state vm86_saved_regs;

    struct target_vm86plus_struct vm86plus;

    uint32_t v86flags;

    uint32_t v86mask;

#endif

#ifdef TARGET_M68K

    int sim_syscalls;

#endif

    int used; /* non zero if used */

    struct image_info *info;

    uint8_t stack[0];

} __attribute__((aligned(16))) TaskState;

extern TaskState *first_task_state;

extern const char *qemu_uname_release;

/* ??? See if we can avoid exposing so much of the loader internals.  */

/*

 * MAX_ARG_PAGES defines the number of pages allocated for arguments

 * and envelope for the new program. 32 should suffice, this gives

 * a maximum env+arg of 128kB w/4KB pages!

 */

#define MAX_ARG_PAGES 32

/*

 * This structure is used to hold the arguments that are 

 * used when loading binaries.

 */

struct linux_binprm {

        char buf[128];

        void *page[MAX_ARG_PAGES];

        unsigned long p;

        int fd;

        int e_uid, e_gid;

        int argc, envc;

        char **argv;

        char **envp;

        char * filename;        /* Name of binary */

};

void do_init_thread(struct target_pt_regs *regs, struct image_info *infop);

target_ulong loader_build_argptr(int envc, int argc, target_ulong sp,

                                 target_ulong stringp, int push_ptr);

int loader_exec(const char * filename, char ** argv, char ** envp, 

             struct target_pt_regs * regs, struct image_info *infop);

int load_elf_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,

                    struct image_info * info);

int load_flt_binary(struct linux_binprm * bprm, struct target_pt_regs * regs,

                    struct image_info * info);

void memcpy_to_target(target_ulong dest, const void *src,

                      unsigned long len);

void target_set_brk(target_ulong new_brk);

long do_brk(target_ulong new_brk);

void syscall_init(void);

long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3, 

                long arg4, long arg5, long arg6);

void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));

extern CPUState *global_env;

void cpu_loop(CPUState *env);

void init_paths(const char *prefix);

const char *path(const char *pathname);

extern int loglevel;

extern FILE *logfile;

/* signal.c */

void process_pending_signals(void *cpu_env);

void signal_init(void);

int queue_signal(int sig, target_siginfo_t *info);

void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);

void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);

long do_sigreturn(CPUState *env);

long do_rt_sigreturn(CPUState *env);

#ifdef TARGET_I386

/* vm86.c */

void save_v86_state(CPUX86State *env);

void handle_vm86_trap(CPUX86State *env, int trapno);

void handle_vm86_fault(CPUX86State *env);

int do_vm86(CPUX86State *env, long subfunction, target_ulong v86_addr);

#endif

/* mmap.c */

int target_mprotect(target_ulong start, target_ulong len, int prot);

long target_mmap(target_ulong start, target_ulong len, int prot, 

                 int flags, int fd, target_ulong offset);

int target_munmap(target_ulong start, target_ulong len);

long target_mremap(target_ulong old_addr, target_ulong old_size, 

                   target_ulong new_size, unsigned long flags,

                   target_ulong new_addr);

int target_msync(target_ulong start, target_ulong len, int flags);

/* user access */

#define VERIFY_READ 0

#define VERIFY_WRITE 1

#define access_ok(type,addr,size) (1)

/* NOTE get_user and put_user use host addresses.  */

#define __put_user(x,ptr)\

({\

    int size = sizeof(*ptr);\

    switch(size) {\

    case 1:\

        *(uint8_t *)(ptr) = (typeof(*ptr))(x);\

        break;\

    case 2:\

        *(uint16_t *)(ptr) = tswap16((typeof(*ptr))(x));\

        break;\

    case 4:\

        *(uint32_t *)(ptr) = tswap32((typeof(*ptr))(x));\

        break;\

    case 8:\

        *(uint64_t *)(ptr) = tswap64((typeof(*ptr))(x));\

        break;\

    default:\

        abort();\

    }\

    0;\

})

#define __get_user(x, ptr) \

({\

    int size = sizeof(*ptr);\

    switch(size) {\

    case 1:\

        x = (typeof(*ptr))*(uint8_t *)(ptr);\

        break;\

    case 2:\

        x = (typeof(*ptr))tswap16(*(uint16_t *)(ptr));\

        break;\

    case 4:\

        x = (typeof(*ptr))tswap32(*(uint32_t *)(ptr));\

        break;\

    case 8:\

        x = (typeof(*ptr))tswap64(*(uint64_t *)(ptr));\

        break;\

    default:\

        abort();\

    }\

    0;\

})

#define put_user(x,ptr)\

({\

    int __ret;\

    if (access_ok(VERIFY_WRITE, ptr, sizeof(*ptr)))\

        __ret = __put_user(x, ptr);\

    else\

        __ret = -EFAULT;\

    __ret;\

})

#define get_user(x,ptr)\

({\

    int __ret;\

    if (access_ok(VERIFY_READ, ptr, sizeof(*ptr)))\

        __ret = __get_user(x, ptr);\

    else\

        __ret = -EFAULT;\

    __ret;\

})

/* Functions for accessing guest memory.  The tget and tput functions

   read/write single values, byteswapping as neccessary.  The lock_user

   gets a pointer to a contiguous area of guest memory, but does not perform

   and byteswapping.  lock_user may return either a pointer to the guest

   memory, or a temporary buffer.  */

/* Lock an area of guest memory into the host.  If copy is true then the

   host area will have the same contents as the guest.  */

static inline void *lock_user(target_ulong guest_addr, long len, int copy)

{

#ifdef DEBUG_REMAP

    void *addr;

    addr = malloc(len);

    if (copy)

        memcpy(addr, g2h(guest_addr), len);

    else

        memset(addr, 0, len);

    return addr;

#else

    return g2h(guest_addr);

#endif

}

/* Unlock an area of guest memory.  The first LEN bytes must be flushed back

   to guest memory.  */

static inline void unlock_user(void *host_addr, target_ulong guest_addr,

                                long len)

{

#ifdef DEBUG_REMAP

    if (host_addr == g2h(guest_addr))

        return;

    if (len > 0)

        memcpy(g2h(guest_addr), host_addr, len);

    free(host_addr);

#endif

}

/* Return the length of a string in target memory.  */

static inline int target_strlen(target_ulong ptr)

{

  return strlen(g2h(ptr));

}

/* Like lock_user but for null terminated strings.  */

static inline void *lock_user_string(target_ulong guest_addr)

{

    long len;

    len = target_strlen(guest_addr) + 1;

    return lock_user(guest_addr, len, 1);

}

/* Helper macros for locking/ulocking a target struct.  */

#define lock_user_struct(host_ptr, guest_addr, copy) \

    host_ptr = lock_user(guest_addr, sizeof(*host_ptr), copy)

#define unlock_user_struct(host_ptr, guest_addr, copy) \

    unlock_user(host_ptr, guest_addr, (copy) ? sizeof(*host_ptr) : 0)

#define tget8(addr) ldub(addr)

#define tput8(addr, val) stb(addr, val)

#define tget16(addr) lduw(addr)

#define tput16(addr, val) stw(addr, val)

#define tget32(addr) ldl(addr)

#define tput32(addr, val) stl(addr, val)

#define tget64(addr) ldq(addr)

#define tput64(addr, val) stq(addr, val)

#if TARGET_LONG_BITS == 64

#define tgetl(addr) ldq(addr)

#define tputl(addr, val) stq(addr, val)

#else

#define tgetl(addr) ldl(addr)

#define tputl(addr, val) stl(addr, val)

#endif

#endif /* QEMU_H */