On 05/09/17 21:42, Jianxun Yan wrote:
Hi,
My application needs to compile linkcmds and create a symbols file.
Here are how I did.
$ arm-rtems4.11-g++
-B/home/yanjx/workspace/rtems411/arm-rtems4.11/altcycv_devkit/lib/
-specs bsp_specs -qrtems -Wall -O2 -g -march=armv7-a -mthumb -mfpu=vfp
-mfloat-abi=softfp -mtune=cortex-a9 -I. -Invram -nodefaultlibs -o
o-optimize/startfiles.obj -Wl,--unresolved-symbols=ignore-all
-T`arm-rtems4.11-gcc --pipe
-B/home/yanjx/workspace/rtems411/arm-rtems4.11/altcycv_devkit/lib/
-specs bsp_specs -qrtems -print-file-name=linkcmds`
This -Wl,--unresolved-symbols=ignore-all sounds a bit dangerous.
$ arm-rtems4.11-nm -g -fposix o-optimize/startfiles.obj >
o-optimize/startfiles.nm
After created the startfiles.nm file, I found there some symbols with
unknown type of '?'
bsp_section_rodata_begin ? 00300204
bsp_section_rodata_end D 00300214
bsp_section_rodata_load_begin A 00300204
bsp_section_rodata_load_end A 00300214
bsp_section_rodata_size A 00000010
bsp_section_rwbarrier_align A 00100000
bsp_section_stack_begin ? 40000000
bsp_section_stack_end ? 40000000
......
__deregister_frame_info w
__dso_handle D 00401400
__exidx_end ? 00300204
__exidx_start ? 00300204
.....
Dose anyone know what causes the problem? and how to solve it?
Maybe these are the ignored undefined symbols?
--
Sebastian Huber, embedded brains GmbH
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