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// Copyright 2017 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
#include <zircon/status.h>
#include <zircon/syscalls.h>
#include "nocover.h"
static void os_init(int argc, char** argv, void* data, size_t data_size)
{
zx_status_t status = syz_mmap((size_t)data, data_size);
if (status != ZX_OK)
failmsg("mmap of data segment failed", "status=%s (%d)", zx_status_get_string(status), status);
}
static intptr_t execute_syscall(const call_t* c, intptr_t a[kMaxArgs])
{
intptr_t res = c->call(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]);
if (strncmp(c->name, "zx_", 3) == 0) {
// Convert zircon error convention to the libc convention that executor expects.
// The following calls return arbitrary integers instead of error codes.
if (res == ZX_OK ||
!strcmp(c->name, "zx_debuglog_read") ||
!strcmp(c->name, "zx_clock_get") ||
!strcmp(c->name, "zx_clock_get_monotonic") ||
!strcmp(c->name, "zx_deadline_after") ||
!strcmp(c->name, "zx_ticks_get"))
return 0;
errno = (-res) & 0x7f;
return -1;
}
// We cast libc functions to signature returning intptr_t,
// as the result int -1 is returned as 0x00000000ffffffff rather than full -1.
if (res == 0xffffffff)
res = (intptr_t)-1;
return res;
}
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