gcc-4.8.3 编译linux-2.6.31内核，数组访问出错的问题求助?
测试代码如下：unsigned char _ctype[] = {
_C,_C,_C,_C,_C,_C,_C,_C, /* 0-7 */
_C,_C|_S,_C|_S,_C|_S,_C|_S,_C|_S,_C,_C, /* 8-15 */
_C,_C,_C,_C,_C,_C,_C,_C, /* 16-23 */
_C,_C,_C,_C,_C,_C,_C,_C, /* 24-31 */
_S|_SP,_P,_P,_P,_P,_P,_P,_P, /* 32-39 */
_P,_P,_P,_P,_P,_P,_P,_P, /* 40-47 */
_D,_D,_D,_D,_D,_D,_D,_D, /* 48-55 */
_D,_D,_P,_P,_P,_P,_P,_P, /* 56-63 */
_P,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U|_X,_U, /* 64-71 */
_U,_U,_U,_U,_U,_U,_U,_U, /* 72-79 */
_U,_U,_U,_U,_U,_U,_U,_U, /* 80-87 */
_U,_U,_U,_P,_P,_P,_P,_P, /* 88-95 */
_P,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L|_X,_L, /* 96-103 */
_L,_L,_L,_L,_L,_L,_L,_L, /* 104-111 */
_L,_L,_L,_L,_L,_L,_L,_L, /* 112-119 */
_L,_L,_L,_P,_P,_P,_P,_C, /* 120-127 */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 128-143 */
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-159 */
_S|_SP,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 160-175 */
_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P,_P, /* 176-191 */
_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U,_U, /* 192-207 */
_U,_U,_U,_U,_U,_U,_U,_P,_U,_U,_U,_U,_U,_U,_U,_L, /* 208-223 */
_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L,_L, /* 224-239 */
_L,_L,_L,_L,_L,_L,_L,_P,_L,_L,_L,_L,_L,_L,_L,_L}; /* 240-255 */
static int format_decode(const char *fmt, struct printf_spec *spec)
{
......
unsigned int index;
unsigned char uch;
......
test:
prom_putstr("format_decode=>");
prom_putstr(fmt);
prom_putstr("\n");
if (isdigit('1')) {
prom_putstr("format_decode=>1 is digit\n");
}
uch = _ctype;
if (uch == 0x02) {
prom_putstr("format_decode=>115 is 0x02\n");
}
index = (unsigned int)(unsigned char)(*fmt);
if (index == 115)
prom_putstr("format_decode=>index is 115\n");
uch = _ctype;
if (uch == 0x02) {
prom_putstr("format_decode=>index is 0x02\n");
}
goto test;
......
}
上面的代码用gcc-4.3.3编译时，运行是没有问题的；
当用gcc-4.8.8编译时，运行的结果为：
format_decode=>s
format_decode=>1 is digit
format_decode=>115 is 0x02
format_decode=>index is 115
也就是说执行“uch = _ctype;”这行代码时挂死了；
请教一下各位高手，上面的问题可能是什么原因引起的？谢谢。
补充一下：
gcc 4.3.3的版本信息如下:
Using built-in specs.
Target: mips-linux-uclibc
Configured with: /home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/gcc-4.3.3/configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=mips-linux-uclibc --enable-languages=c --with-sysroot=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/build_mips/staging_dir --with-build-time-tools=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/build_mips/staging_dir/usr/mips-linux-uclibc/bin --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --disable-libssp --disable-tls --enable-shared --with-gmp=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/gmp --with-mpfr=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/mpfr --disable-nls --enable-threads --disable-multilib --disable-decimal-float --with-float=soft --with-abi=32 --with-tune=mips32r2 : (reconfigured) /home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/gcc-4.3.3/configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=mips-linux-uclibc --enable-languages=c --with-sysroot=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/build_mips/staging_dir --with-build-time-tools=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/build_mips/staging_dir/usr/mips-linux-uclibc/bin --disable-__cxa_atexit --enable-target-optspace --with-gnu-ld --disable-libssp --disable-tls --enable-shared --with-gmp=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/gmp --with-mpfr=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.3.3/toolchain_build_mips/mpfr --disable-nls --enable-threads --disable-multilib --disable-decimal-float --with-float=soft --with-abi=32 --with-tune=mips32r2
Thread model: posix
gcc version 4.3.3 (GCC)
gcc 4.8.3的版本信息如下：
使用内建 specs。
COLLECT_GCC=mips-linux-gcc
COLLECT_LTO_WRAPPER=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr/libexec/gcc/mips-buildroot-linux-uclibc/4.8.3/lto-wrapper
目标：mips-buildroot-linux-uclibc
配置为：./configure --prefix=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr --sysconfdir=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/etc --enable-static --target=mips-buildroot-linux-uclibc --with-sysroot=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr/mips-buildroot-linux-uclibc/sysroot --disable-__cxa_atexit --with-gnu-ld --disable-libssp --disable-multilib --with-gmp=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr --with-mpfr=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr --enable-target-optspace --disable-libquadmath --disable-libsanitizer --enable-tls --disable-libmudflap --enable-threads --with-mpc=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr --without-isl --without-cloog --with-float=soft --disable-decimal-float --with-arch=mips32r2 --with-abi=32 --with-pkgversion='Buildroot 2015.02-git'--enable-languages=c --with-build-time-tools=/home/u/ar9342_mi124_ap/sdk/build/gcc-4.8.3/output/host/usr/mips-buildroot-linux-uclibc/bin --enable-shared --disable-libgomp
线程模型：posix
gcc 版本 4.8.3 (Buildroot 2015.02-git)
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