Archipelago » qemu

#include <stdio.h>

#include <errno.h>

#include <sys/ipc.h>

#include <sys/msg.h>

#include <sys/sem.h>

#include <sys/shm.h>

#include <sys/select.h>

#include <sys/types.h>

#include <unistd.h>

#include "qemu.h"

int do_strace=0;

struct syscallname {

    int nr;

    const char *name;

    const char *format;

    void (*call)(const struct syscallname *,

                 abi_long, abi_long, abi_long,

                 abi_long, abi_long, abi_long);

    void (*result)(const struct syscallname *, abi_long);

};

/*

 * Utility functions

 */

static void

print_ipc_cmd(int cmd)

{

#define output_cmd(val) \

if( cmd == val ) { \

    gemu_log(#val); \

    return; \

}

    cmd &= 0xff;

    /* General IPC commands */

    output_cmd( IPC_RMID );

    output_cmd( IPC_SET );

    output_cmd( IPC_STAT );

    output_cmd( IPC_INFO );

    /* msgctl() commands */

    #ifdef __USER_MISC

    output_cmd( MSG_STAT );

    output_cmd( MSG_INFO );

    #endif

    /* shmctl() commands */

    output_cmd( SHM_LOCK );

    output_cmd( SHM_UNLOCK );

    output_cmd( SHM_STAT );

    output_cmd( SHM_INFO );

    /* semctl() commands */

    output_cmd( GETPID );

    output_cmd( GETVAL );

    output_cmd( GETALL );

    output_cmd( GETNCNT );

    output_cmd( GETZCNT );

    output_cmd( SETVAL );

    output_cmd( SETALL );

    output_cmd( SEM_STAT );

    output_cmd( SEM_INFO );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    output_cmd( IPC_RMID );

    /* Some value we don't recognize */

    gemu_log("%d",cmd);

}

#ifdef TARGET_NR__newselect

static void

print_fdset(int n, abi_ulong target_fds_addr)

{

    int i;

    gemu_log("[");

    if( target_fds_addr ) {

        abi_long *target_fds;

        target_fds = lock_user(VERIFY_READ,

                               target_fds_addr,

                               sizeof(*target_fds)*(n / TARGET_ABI_BITS + 1),

                               1);

        if (!target_fds)

            return;

        for (i=n; i>=0; i--) {

            if ((tswapl(target_fds[i / TARGET_ABI_BITS]) >> (i & (TARGET_ABI_BITS - 1))) & 1)

                gemu_log("%d,", i );

            }

        unlock_user(target_fds, target_fds_addr, 0);

    }

    gemu_log("]");

}

static void

print_timeval(abi_ulong tv_addr)

{

    if( tv_addr ) {

        struct target_timeval *tv;

        tv = lock_user(VERIFY_READ, tv_addr, sizeof(*tv), 1);

        if (!tv)

            return;

        gemu_log("{" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "}",

                 tv->tv_sec, tv->tv_usec);

        unlock_user(tv, tv_addr, 0);

    } else

        gemu_log("NULL");

}

#endif

/*

 * Sysycall specific output functions

 */

/* select */

#ifdef TARGET_NR__newselect

static long newselect_arg1 = 0;

static long newselect_arg2 = 0;

static long newselect_arg3 = 0;

static long newselect_arg4 = 0;

static long newselect_arg5 = 0;

static void

print_newselect(const struct syscallname *name,

                abi_long arg1, abi_long arg2, abi_long arg3,

                abi_long arg4, abi_long arg5, abi_long arg6)

{

    gemu_log("%s(" TARGET_ABI_FMT_ld ",", name->name, arg1);

    print_fdset(arg1, arg2);

    gemu_log(",");

    print_fdset(arg1, arg3);

    gemu_log(",");

    print_fdset(arg1, arg4);

    gemu_log(",");

    print_timeval(arg5);

    gemu_log(")");

    /* save for use in the return output function below */

    newselect_arg1=arg1;

    newselect_arg2=arg2;

    newselect_arg3=arg3;

    newselect_arg4=arg4;

    newselect_arg5=arg5;

}

#endif

#ifdef TARGET_NR_semctl

static void

print_semctl(const struct syscallname *name,

             abi_long arg1, abi_long arg2, abi_long arg3,

             abi_long arg4, abi_long arg5, abi_long arg6)

{

    gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", name->name, arg1, arg2);

    print_ipc_cmd(arg3);

    gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4);

}

#endif

static void

print_execve(const struct syscallname *name,

             abi_long arg1, abi_long arg2, abi_long arg3,

             abi_long arg4, abi_long arg5, abi_long arg6)

{

    abi_ulong arg_ptr_addr;

    char *s;

    if (!(s = lock_user_string(arg1)))

        return;

    gemu_log("%s(\"%s\",{", name->name, s);

    unlock_user(s, arg1, 0);

    for (arg_ptr_addr = arg2; ; arg_ptr_addr += sizeof(abi_ulong)) {

        abi_ulong *arg_ptr, arg_addr;

        arg_ptr = lock_user(VERIFY_READ, arg_ptr_addr, sizeof(abi_ulong), 1);

        if (!arg_ptr)

            return;

        arg_addr = tswapl(*arg_ptr);

        unlock_user(arg_ptr, arg_ptr_addr, 0);

        if (!arg_addr)

            break;

        if ((s = lock_user_string(arg_addr))) {

            gemu_log("\"%s\",", s);

            unlock_user(s, arg_addr, 0);

        }

    }

    gemu_log("NULL})");

}

#ifdef TARGET_NR_ipc

static void

print_ipc(const struct syscallname *name,

          abi_long arg1, abi_long arg2, abi_long arg3,

          abi_long arg4, abi_long arg5, abi_long arg6)

{

    switch(arg1) {

    case IPCOP_semctl:

        gemu_log("semctl(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ",", arg1, arg2);

        print_ipc_cmd(arg3);

        gemu_log(",0x" TARGET_ABI_FMT_lx ")", arg4);

        break;

    default:

        gemu_log("%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")",

                 name->name, arg1, arg2, arg3, arg4);

    }

}

#endif

/*

 * Variants for the return value output function

 */

static void

print_syscall_ret_addr(const struct syscallname *name, abi_long ret)

{

if( ret == -1 ) {

        gemu_log(" = -1 errno=%d (%s)\n", errno, target_strerror(errno));

    } else {

        gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);

    }

}

#if 0 /* currently unused */

static void

print_syscall_ret_raw(struct syscallname *name, abi_long ret)

{

        gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);

}

#endif

#ifdef TARGET_NR__newselect

static void

print_syscall_ret_newselect(const struct syscallname *name, abi_long ret)

{

    gemu_log(" = 0x" TARGET_ABI_FMT_lx " (", ret);

    print_fdset(newselect_arg1,newselect_arg2);

    gemu_log(",");

    print_fdset(newselect_arg1,newselect_arg3);

    gemu_log(",");

    print_fdset(newselect_arg1,newselect_arg4);

    gemu_log(",");

    print_timeval(newselect_arg5);

    gemu_log(")\n");

}

#endif

/*

 * An array of all of the syscalls we know about

 */

static const struct syscallname scnames[] = {

#include "strace.list"

};

static int nsyscalls = ARRAY_SIZE(scnames);

/*

 * The public interface to this module.

 */

void

print_syscall(int num,

              abi_long arg1, abi_long arg2, abi_long arg3,

              abi_long arg4, abi_long arg5, abi_long arg6)

{

    int i;

    const char *format="%s(" TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld "," TARGET_ABI_FMT_ld ")";

    gemu_log("%d ", getpid() );

    for(i=0;i<nsyscalls;i++)

        if( scnames[i].nr == num ) {

            if( scnames[i].call != NULL ) {

                scnames[i].call(&scnames[i],arg1,arg2,arg3,arg4,arg5,arg6);

            } else {

                /* XXX: this format system is broken because it uses

                   host types and host pointers for strings */

                if( scnames[i].format != NULL )

                    format = scnames[i].format;

                gemu_log(format,scnames[i].name, arg1,arg2,arg3,arg4,arg5,arg6);

            }

            return;

        }

    gemu_log("Unknown syscall %d\n", num);

}

void

print_syscall_ret(int num, abi_long ret)

{

    int i;

    for(i=0;i<nsyscalls;i++)

        if( scnames[i].nr == num ) {

            if( scnames[i].result != NULL ) {

                scnames[i].result(&scnames[i],ret);

            } else {

                if( ret < 0 ) {

                    gemu_log(" = -1 errno=" TARGET_ABI_FMT_ld " (%s)\n", -ret, target_strerror(-ret));

                } else {

                    gemu_log(" = " TARGET_ABI_FMT_ld "\n", ret);

                }

            }

            break;

        }

}