32030f7750
Some Android systems cannot read from /proc/self/auxv. Work around this by creating a minimal fake auxv for the Go runtime. Fixes #9229 Change-Id: Id2d743f43d91be23006aac708a5b5b5cd60a6dca Reviewed-on: https://go-review.googlesource.com/1284 Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
// Copyright 2014 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build android,x86
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#include <android/log.h>
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#include <dlfcn.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include "_cgo_export.h"
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void build_auxv(uint32_t *xauxv, size_t xauxv_len) {
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char* auxv = (char*)xauxv;
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size_t auxv_len = xauxv_len*sizeof(uint32_t);
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// TODO(crawshaw): determine if we can read /proc/self/auxv on
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// x86 android release builds.
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int fd = open("/proc/self/auxv", O_RDONLY, 0);
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if (fd == -1) {
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__android_log_print(ANDROID_LOG_FATAL, "Go", "cannot open /proc/self/auxv: %s", strerror(errno));
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}
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int n = read(fd, &auxv, auxv_len);
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if (n < 0) {
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__android_log_print(ANDROID_LOG_FATAL, "Go", "error reading /proc/self/auxv: %s", strerror(errno));
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}
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if (n == auxv_len) { // auxv should be more than plenty.
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__android_log_print(ANDROID_LOG_FATAL, "Go", "/proc/self/auxv too big");
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}
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close(fd);
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for (; n < auxv_len; n++) {
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auxv[n] = 0;
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}
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}
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