[英]Cross compile PHP with UCLIBC
THIS IS A REPOST, PREVIOUS POST GOT CLOSED, MOVED TO SERVERFAULT AND CLOSED AGAIN. 这是一个已经存在的,以前的后期关闭,移动到服务器并再次关闭。 I think this post is a valid stackoverflow problem because i think its caused by some automake/compile/linking error.
我认为这篇文章是一个有效的stackoverflow问题,因为我认为它是由一些automake /编译/链接错误引起的。 This is a programming problem not a server admin problem.
这是编程问题,而不是服务器管理问题。
https://serverfault.com/questions/418521/cross-compile-php https://serverfault.com/questions/418521/cross-compile-php
Start of post 开始发布
I have downloaded the PHP 5.4.0 source, extracted it and moved into the source folder. 我已经下载了PHP 5.4.0源代码,将其解压缩并移动到源文件夹中。
I do a configure with: 我做配置:
./configure --build=x86_64-unknown-linux-gnu --host=arm-linux-uclibcgnueabi --prefix=/usr/arm/www CC="arm-linux-uclibcgnueabi-gcc --sysroot=/toolchains/gnu_cortex-a9_tools/" --disable-libxml --disable-dom --without-iconv --without-openssl --disable-simplexml --disable-xml --disable-xmlreader --disable-xmlwriter --without-pear --without-sqlite3 --disable-pdo --without-pdo-sqlite --disable-phar --with-config-file-path=/etc/
Followed by 其次是
make
no errors, everything runs fine. 没有错误,一切都运行良好。 Next i do a make install.
接下来我做一个make install。
make install
Again everything runs fine. 一切都运行良好。 i move it to the target platform and run
我将它移动到目标平台并运行
/usr/arm/www/bin/php -v
PHP 5.4.0 (cli) (built: Aug 15 2012 16:07:41)
Copyright (c) 1997-2012 The PHP Group
Zend Engine v2.4.0, Copyright (c) 1998-2012 Zend Technologies
I test a simple home page with my webserver and directly with php. 我用我的网络服务器和php直接测试一个简单的主页。
<?php echo "hello" ?>
# php index.php
hello
it works as expected. 它按预期工作。 next i test:
接下来我测试:
<?php
$output = shell_exec('ls -lart');
echo "<pre>$output</pre>";
?>
oh noes~ 哦,不!
# php shell.php
Segmentation fault
I teset another script: 我设定了另一个脚本:
#!/bin/php
<?php
echo "hello";
$handle = fopen("info.txt", "r");
echo $handle;
?>
Same result: 相同的结果:
# php index.php
helloSegmentation fault
do i have a php.ini? 我有php.ini吗?
# /usr/arm/www/bin/php --ini
Configuration File (php.ini) Path: /etc/
Loaded Configuration File: /etc/php.ini
yes, and no disabled functions. 是的,没有禁用的功能。 testing strace /usr/arm/www/bin/php index.php
测试strace / usr / arm / www / bin / php index.php
lstat("/srv/www/info.txt", {st_mode=S_IFREG|0644, st_size=20, ...}) = 0
open("/srv/www/info.txt", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=20, ...}) = 0
lseek(3, 10, SEEK_CUR) = 0
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
the file info.txt exists and it got premission to read/write to it. 文件info.txt存在,它已经预先读取/写入它。
Testing strace /usr/arm/www/bin/php shell.php 测试strace / usr / arm / www / bin / php shell.php
fcntl64(3, F_GETFL) = 0 (flags O_RDONLY)
ioctl(3, SNDCTL_TMR_TIMEBASE or TCGETS, 0x7e31fddc) = -1 EINVAL (Invalid argument)
vfork() = 3324
close(4) = 0
fstat(3, {st_mode=S_IFIFO|0600, st_size=0, ...}) = 0
read(3, "total 24\n-rw-rw-r-- 1 1001 "..., 8192) = 468
read(3, ""..., 8192) = 0
--- SIGCHLD (Child exited) @ 0 (0) ---
close(3) = 0
wait4(3324, [{WIFEXITED(s) && WEXITSTATUS(s) == 0}], 0, NULL) = 3324
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++
if i run the index.php through gdb it gives me: 如果我通过gdb运行index.php它给了我:
Starting program: /usr/arm/www/bin/php index.php
hello
Program received signal SIGSEGV, Segmentation fault.
zend_do_fcall_common_helper_SPEC (execute_data=0x2ac7a040) at /home/maiden/Downloads/php-5.4.0/Zend/zend.h:391
391 /home/maiden/Downloads/php-5.4.0/Zend/zend.h: No such file or directory.
in /home/maiden/Downloads/php-5.4.0/Zend/zend.h
gdb gives me this from shell.php Starting program: /usr/arm/www/bin/php shell.php gdb从shell.php给我这个启动程序:/ usr / arm / www / bin / php shell.php
Program received signal SIGSEGV, Segmentation fault.
zend_do_fcall_common_helper_SPEC (execute_data=0x2ab76040) at /home/maiden/Downloads/php-5.4.0/Zend/zend.h:391
391 in /home/maiden/Downloads/php-5.4.0/Zend/zend.h
zend.h is located in /usr/arm/www/include/php/Zend/ obviously something went wrong during cross compilation. zend.h位于/ usr / arm / www / include / php / Zend /显然在交叉编译过程中出错了。 what have i missed?
我错过了什么? i do not find any configure flag to correct this and creating a symlink to the desired location removes the gdb output but php still segfaults.
我没有找到任何配置标志来纠正这一点,并创建一个符号链接到所需的位置删除gdb输出但PHP仍然是段错误。
Thanks for any help! 谢谢你的帮助!
UPDATE: 更新:
# valgrind php test.php
==2181== Memcheck, a memory error detector
==2181== Copyright (C) 2002-2012, and GNU GPL'd, by Julian Seward et al.
==2181== Using Valgrind-3.8.0 and LibVEX; rerun with -h for copyright info
==2181== Command: php test.php
==2181==
==2181== Conditional jump or move depends on uninitialised value(s)
==2181== at 0x4004EC8: ??? (in /lib/ld-uClibc-0.9.30-nptl.so)
==2181==
==2181== Invalid read of size 4
==2181== at 0x4004D48: _dl_get_ready_to_run (in /lib/ld-uClibc-0.9.30-nptl.so)
==2181== Address 0x7d4cc304 is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes
==2181==
==2181== Invalid read of size 4
==2181== at 0x48C348C: __uClibc_main (in /lib/libuClibc-0.9.30-nptl.so)
==2181== Address 0x7d4cc554 is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes
==2181==
==2181== Invalid write of size 4
==2181== at 0x233010: __eqdf2 (ieee754-df.S:1120)
==2181== Address 0x7d4cb0bc is just below the stack ptr. To suppress, use: --workaround-gcc296-bugs=yes
==2181==
Warning: shell_exec(): Unable to execute 'ls -lart' in /test.php on line 3
==2181== Invalid read of size 4
==2181== at 0x1FF1AC: zend_do_fcall_common_helper_SPEC (zend.h:391)
==2181== by 0x1F3D17: execute (zend_vm_execute.h:410)
==2181== by 0x18B217: zend_execute_scripts (zend.c:1279)
==2181== by 0x1365BB: php_execute_script (main.c:2473)
==2181== by 0x22B52B: do_cli (php_cli.c:988)
==2181== by 0x22BD4B: main (php_cli.c:1364)
==2181== Address 0x8 is not stack'd, malloc'd or (recently) free'd
==2181==
Segmentation fault
Update2 UPDATE2
re-run valgrind with memcheck, got about the same output as before but this was new: 用memcheck重新运行valgrind,获得与之前相同的输出,但这是新的:
php: can't resolve symbol '__libc_freeres'
Update3 UPDATE3
While valgrind have failed me, i continued with gdb, i created the folder /home/maiden/..etc on my target system and copied over the content of my php/include folder and re-run gdb. 虽然valgrind让我失望,但我继续使用gdb,我在目标系统上创建了文件夹/home/maiden/..etc并复制了我的php / include文件夹的内容并重新运行gdb。 now i get this error message:
现在我收到此错误消息:
(gdb) run index.php
Starting program: /bin/php index.php
hello
Program received signal SIGSEGV, Segmentation fault.
zend_do_fcall_common_helper_SPEC (execute_data=0x2ab34040) at /home/maiden/Downloads/php-5.4.5/Zend/zend.h:391
warning: Source file is more recent than executable.
391 return --pz->refcount__gc;
this is very similar to what sixeightzero wrote in the comments yesterday. 这与sixeightzero在昨天的评论中所写的非常相似。 I have now tried PHP version 5.3.5, 5.4.0, 5.4.5 same error on all.
我现在尝试了PHP版本5.3.5,5.4.0,5.4.5相同的错误。
Update4 UPDATE4
I downloaded a new toolchain for glibc, cross compiled a new busybox with glibc, created a chroot jail, cross compiled php with glibc instead of uclibc and tested it inside my chroot jail on my uclibc box, and it works! 我为glibc下载了一个新的工具链,用glibc交叉编译了一个新的busybox,创建了一个chroot jail,用glibc而不是uclibc交叉编译了php,并在我的uclibc盒子里的chroot jail中测试了它,它的工作原理! But i still need to get php to work in my uclibc environment....
但我仍然需要让php在我的uclibc环境中工作....
i would check configure.log of uClibc to see if ARCH_USE_MMU and fork is enabled. 我会检查uClibc的configure.log以查看是否启用了ARCH_USE_MMU和fork。 if not vfork is replaced with fork which is likely to be used by shell_exec.
如果没有vfork被替换为fork可能被shell_exec使用。 the main problem with vfork is, parent and child uses same memory space which leads to weird crashes.
vfork的主要问题是,父和子使用相同的内存空间导致奇怪的崩溃。
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