github.com/google/syzkaller@v0.0.0-20240517125934-c0f1611a36d6/executor/executor_fuchsia.h (about)

     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 <sys/mman.h>
     9  #include <unistd.h>
    10  #include <zircon/status.h>
    11  #include <zircon/syscalls.h>
    12  
    13  #include "nocover.h"
    14  
    15  static void os_init(int argc, char** argv, void* data, size_t data_size)
    16  {
    17  	zx_status_t status = syz_mmap((size_t)data, data_size);
    18  	if (status != ZX_OK)
    19  		failmsg("mmap of data segment failed", "status=%s (%d)", zx_status_get_string(status), status);
    20  }
    21  
    22  static intptr_t execute_syscall(const call_t* c, intptr_t a[kMaxArgs])
    23  {
    24  	intptr_t res = c->call(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8]);
    25  	if (strncmp(c->name, "zx_", 3) == 0) {
    26  		// Convert zircon error convention to the libc convention that executor expects.
    27  		// The following calls return arbitrary integers instead of error codes.
    28  		if (res == ZX_OK ||
    29  		    !strcmp(c->name, "zx_debuglog_read") ||
    30  		    !strcmp(c->name, "zx_clock_get") ||
    31  		    !strcmp(c->name, "zx_clock_get_monotonic") ||
    32  		    !strcmp(c->name, "zx_deadline_after") ||
    33  		    !strcmp(c->name, "zx_ticks_get"))
    34  			return 0;
    35  		errno = (-res) & 0x7f;
    36  		return -1;
    37  	}
    38  	// We cast libc functions to signature returning intptr_t,
    39  	// as the result int -1 is returned as 0x00000000ffffffff rather than full -1.
    40  	if (res == 0xffffffff)
    41  		res = (intptr_t)-1;
    42  	return res;
    43  }