1 // Copyright 2017 syzkaller project authors. All rights reserved. 2 // Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file. 3 4 #include <errno.h> 5 #include <pthread.h> 6 #include <stdlib.h> 7 #include <string.h> 8 #include <unistd.h> 9 #include <zircon/syscalls.h> 10 11 #include "nocover.h" 12 13 static void os_init(int argc, char** argv, void* data, size_t data_size) 14 { 15 if (syz_mmap((size_t)data, data_size) != ZX_OK) 16 fail("mmap of data segment failed"); 17 } 18 19 static long execute_syscall(const call_t* c, long a[kMaxArgs]) 20 { 21 long res = c->call(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]); 22 if (strncmp(c->name, "zx_", 3) == 0) { 23 // Convert zircon error convention to the libc convention that executor expects. 24 if (res == ZX_OK || 25 !strcmp(c->name, "zx_log_read") || 26 !strcmp(c->name, "zx_clock_get") || 27 !strcmp(c->name, "zx_ticks_get")) 28 return 0; 29 errno = (-res) & 0x7f; 30 return -1; 31 } 32 // We cast libc functions to signature returning long, 33 // as the result int -1 is returned as 0x00000000ffffffff rather than full -1. 34 if (res == 0xffffffff) 35 res = (long)-1; 36 return res; 37 } 38
