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go/src/runtime/rt0_android_amd64.s
Austin Clements 6f287fa2bb runtime: fall back to /proc/self/auxv in Android libs
Android's libc doesn't provide access to auxv, so currently the Go
runtime synthesizes a fake, minimal auxv when loaded as a library on
Android. This used to be sufficient, but now we depend on auxv to
retrieve the system physical page size and panic if we can't retrieve
it.

Fix this by falling back to reading auxv from /proc/self/auxv if the
loader-provided auxv is empty and removing the synthetic auxv vectors.

Fixes #18041.

Change-Id: Ia2ec2c764a6609331494a5d359032c56cbb83482
Reviewed-on: https://go-review.googlesource.com/33652
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Crawshaw <crawshaw@golang.org>
2016-11-29 15:27:53 +00:00

27 lines
830 B
ArmAsm

// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "textflag.h"
TEXT _rt0_amd64_android(SB),NOSPLIT,$-8
MOVQ 0(SP), DI // argc
LEAQ 8(SP), SI // argv
MOVQ $main(SB), AX
JMP AX
TEXT _rt0_amd64_android_lib(SB),NOSPLIT,$0
MOVQ $1, DI // argc
MOVQ $_rt0_amd64_android_argv(SB), SI // argv
MOVQ $_rt0_amd64_linux_lib(SB), AX
JMP AX
DATA _rt0_amd64_android_argv+0x00(SB)/8,$_rt0_amd64_android_argv0(SB)
DATA _rt0_amd64_android_argv+0x08(SB)/8,$0 // end argv
DATA _rt0_amd64_android_argv+0x10(SB)/8,$0 // end envv
DATA _rt0_amd64_android_argv+0x18(SB)/8,$0 // end auxv
GLOBL _rt0_amd64_android_argv(SB),NOPTR,$0x20
DATA _rt0_amd64_android_argv0(SB)/8, $"gojni"
GLOBL _rt0_amd64_android_argv0(SB),RODATA,$8