Archipelago » qemu

#include <stdio.h>

#include <errno.h>

#include <sys/select.h>

#include <sys/types.h>

#include <unistd.h>

#include <sys/syscall.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_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})");

}

/*

 * 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, 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

/*

 * An array of all of the syscalls we know about

 */

static const struct syscallname freebsd_scnames[] = {

#include "freebsd/strace.list"

};

static const struct syscallname netbsd_scnames[] = {

#include "netbsd/strace.list"

};

static const struct syscallname openbsd_scnames[] = {

#include "openbsd/strace.list"

};

static void

print_syscall(int num, const struct syscallname *scnames, unsigned int nscnames,

              abi_long arg1, abi_long arg2, abi_long arg3,

              abi_long arg4, abi_long arg5, abi_long arg6)

{

    unsigned 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 < nscnames; 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);

}

static void

print_syscall_ret(int num, abi_long ret, const struct syscallname *scnames,

                  unsigned int nscnames)

{

    unsigned int i;

    for (i = 0; i < nscnames; 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,

                             strerror(-ret));

                } else {

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

                }

            }

            break;

        }

}

/*

 * The public interface to this module.

 */

void

print_freebsd_syscall(int num,

                      abi_long arg1, abi_long arg2, abi_long arg3,

                      abi_long arg4, abi_long arg5, abi_long arg6)

{

    print_syscall(num, freebsd_scnames, ARRAY_SIZE(freebsd_scnames),

                  arg1, arg2, arg3, arg4, arg5, arg6);

}

void

print_freebsd_syscall_ret(int num, abi_long ret)

{

    print_syscall_ret(num, ret, freebsd_scnames, ARRAY_SIZE(freebsd_scnames));

}

void

print_netbsd_syscall(int num,

                      abi_long arg1, abi_long arg2, abi_long arg3,

                      abi_long arg4, abi_long arg5, abi_long arg6)

{

    print_syscall(num, netbsd_scnames, ARRAY_SIZE(netbsd_scnames),

                  arg1, arg2, arg3, arg4, arg5, arg6);

}

void

print_netbsd_syscall_ret(int num, abi_long ret)

{

    print_syscall_ret(num, ret, netbsd_scnames, ARRAY_SIZE(netbsd_scnames));

}

void

print_openbsd_syscall(int num,

                      abi_long arg1, abi_long arg2, abi_long arg3,

                      abi_long arg4, abi_long arg5, abi_long arg6)

{

    print_syscall(num, openbsd_scnames, ARRAY_SIZE(openbsd_scnames),

                  arg1, arg2, arg3, arg4, arg5, arg6);

}

void

print_openbsd_syscall_ret(int num, abi_long ret)

{

    print_syscall_ret(num, ret, openbsd_scnames, ARRAY_SIZE(openbsd_scnames));

}