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