我正在尝试在TI CC2538 ARM Cortex M3部件上使用newlib。目标是使用printf来调试消息，我实际上已经开始工作了。但是，系统会在一些消息（ARM调用HardFault）之后发生段错误，而我不明白为什么。
我使用GDB获取以下堆栈跟踪：
(gdb) bt full
#0 FaultISR () at src/startup_gcc.c:307
fault_stat = 0x8200
hfault_stat = 0x40000000
mmfault_stat = 0xfffffff8
busfault_stat = 0xfffffff8
buf = "\000\000\000\000\371\377\377\377\026\000\000\000\000\000\000\000\n\000\000\000\000\000\000\000\b\f\000 \002\000\000\000\060\r\000 \320\f\000 \002\000\000\000\303w \000\000\000\000\000w?\032\000\360\v\000 \360\v\000 \002\000\000\000\027\000\000\000\003\000\000\000\277\022\035\000\b\f\000 \b\f\000 \r\000 \027\000\000\000\f\000\000\000\371\377\377\377T\025\000 a\217 \000\r\000\000\000\001\000\000\000\210\r\000 s\263\""
#1 <signal handler called>
No symbol table info available.
#2 0x002076dc in strlen ()
No symbol table info available.
#3 0x0020494a in _svfprintf_r ()
No symbol table info available.
#4 0x002045aa in _vsnprintf_r ()
No symbol table info available.
#5 0x002045fe in vsnprintf ()
No symbol table info available.
#6 0x00200fa8 in ws_debug_vfprintf (f=STDERR, fmt=0x208f24 "Received a packet of length %u\n", args=...) at src/os/ws_debug.c:220
len = 0x27
buf = 0x20001538 "DBG src/net/mac/packet_scheduler.c:123 "
#7 0x00200f4e in ws_debug_fprintf (f=STDERR, fmt=0x208f24 "Received a packet of length %u\n") at src/os/ws_debug.c:201
args = {__ap = 0x20000e50 <pui32Stack+440>}
#8 0x00201dea in packet_scheduler_timer () at src/net/mac/packet_scheduler.c:123
phy_len = 0xd
pkt = 0x8ef6
fcf = 0x0
buf = 0x20001738 "\200\220"
#9 0x00200c32 in ws_timer_update () at src/os/ws_timer.c:156
ptr = 0x20001728
new = 0x20001728
#10 0x002005c2 in main () at src/main.c:143
No locals.
正如您所看到的，newlib部件（＃2 - ＃5）没有任何信息，因此很难调试。我假设这是因为newlib被删除了调试符号，但是我重新编译了newlib并得到了相同的结果。
我使用官方回购中提供的工具链运行Arch linux。
arm-none-eabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-none-eabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-none-eabi/5.1.0/lto-wrapper
Target: arm-none-eabi
Configured with: /build/arm-none-eabi-gcc/src/gcc-5-20150519/configure --target=arm-none-eabi --prefix=/usr --with-sysroot=/usr/arm-none-eabi --with-native-system-header-dir=/include --libexecdir=/usr/lib --enable-languages=c,c++ --enable-plugins --disable-decimal-float --disable-libffi --disable-libgomp --disable-libmudflap --disable-libquadmath --disable-libssp --disable-libstdcxx-pch --disable-nls --disable-shared --disable-threads --disable-tls --with-gnu-as --with-gnu-ld --with-system-zlib --with-newlib --with-headers=/usr/arm-none-eabi/include --with-python-dir=share/gcc-arm-none-eabi --with-gmp --with-mpfr --with-mpc --with-isl --with-libelf --enable-gnu-indirect-function --with-host-libstdcxx='-static-libgcc -Wl,-Bstatic,-lstdc++,-Bdynamic -lm' --with-pkgversion='Arch Repository' --with-bugurl=https://bugs.archlinux.org/ --with-multilib-list=armv6-m,armv7-m,armv7e-m,armv7-r
Thread model: single
gcc version 5.1.0 (Arch Repository)
-
arm-none-eabi-gdb -v
GNU gdb (GDB) 7.9.1
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=arm-none-eabi".
Type "show configuration" for configuration details.
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我使用Arch Build System（ABS）手动构建了newlib包，我认为应该包含调试符号（函数名称显示在GDB中。这还够吗？）
关于我接下来可以尝试的任何想法？
我修改了输出，因此故障状态寄存器实际上是可读的。
这是解码输出：
fault_stat: 0x8200 (BFARV, PRECISE)
hfault_stat: 0x40000000 (FORCED)
busfault_stat: 0xfffffff8 (valid FAULTADDR)
解释说，我们有一个总线故障异常，其中包含存储在FAULTADDR中的违规指令的地址。我不确定是什么导致CPU尝试拨打0xffffff8，但我很确定这会导致问题。