Sortly,
We have a global variable which is initialized to 1 and named AMLogging.
When we compile our source it does not cause any problem but when we change
AMLogging = 0;
and compile, if at run time we try to access to this variable it is causing
system to crash with a floating point exception to 4-byte aligned address.
We think that because the location of the variable moves to bss instead of data
section compiler makes alignment errors.
I also send the snippet from assembly
.globl AMLoggingClearedAlarms
.section .bss
.align 2
.type AMLoggingClearedAlarms, @object
.size AMLoggingClearedAlarms, 4
AMLoggingClearedAlarms:
.space 4
.globl AMLoggingClearedAlarms
.align 2
.type AMLoggingClearedAlarms, @object
.size AMLoggingClearedAlarms, 4
AMLoggingClearedAlarms:
.word 1
Following is about our compiler version and options used.
bt0puk:/home/mekici/crash/geltbas/acpu> mips-gcc -v -save-temps -DLANGUAGE_C
-O2 -g -DACPU_SCM -DGELT -DGFI_GM_RUN_TIME -DGM_USE_BPD -DGM_PM_TYPE_PROMPT
-nostdlib -I. -I./Includes -nostdinc -fsigned-char -fno-builtin -Wreturn-type
-Wuninitialized -Winline -Wswitch -Wchar-subscripts -Wshadow
-Wimplicit-function-declaration -DREL_220 -mlong-calls -mdivide-breaks -mfp32
-mhard-float -mdouble-float -march=rm9k -mips4 -EL -G 0 -c ./image-ver.c
Reading specs from /project/xana/gcc-3.4.3/bin/../lib/gcc/mips/3.4.3/specs
Configured with: ../gcc-3.4.3/configure --prefix=/home/beckers/crossdev
--target=mips --disable-threads --with-newlib --disable-shared
--enable-languages=c --with-stabs --nfp --with-gnu-as --with-gnu-ld
Thread model: single
gcc version 3.4.3
/project/xana/gcc-3.4.3/bin/../libexec/gcc/mips/3.4.3/cc1 -E -quiet -nostdinc
-v -I. -I./Includes -iprefix /project/xana/gcc-3.4.3/bin/../lib/gcc/mips/3.4.3/
-DLANGUAGE_C -DACPU_SCM -DGELT -DGFI_GM_RUN_TIME -DGM_USE_BPD
-DGM_PM_TYPE_PROMPT -DREL_220 ./image-ver.c -G 0 -mel -mlong-calls
-mdivide-breaks -mfp32 -mhard-float -mdouble-float -march=rm9k -mips4
-Wreturn-type -Wuninitialized -Winline -Wswitch -Wchar-subscripts -Wshadow
-Wimplicit-function-declaration -fsigned-char -fno-builtin -fworking-directory
-O2 -o image-ver.i
#include "..." search starts here:
#include <...> search starts here:
.
./Includes
/usr/openwin/lib
/ap/local/5.8/include
End of search list.
/project/xana/gcc-3.4.3/bin/../libexec/gcc/mips/3.4.3/cc1 -fpreprocessed
image-ver.i -G 0 -mel -quiet -dumpbase image-ver.c -mlong-calls -mdivide-breaks
-mfp32 -mhard-float -mdouble-float -march=rm9k -mips4 -auxbase image-ver -g -O2
-Wreturn-type -Wuninitialized -Winline -Wswitch -Wchar-subscripts -Wshadow
-Wimplicit-function-declaration -version -fsigned-char -fno-builtin -o
image-ver.s
GNU C version 3.4.3 (mips)
compiled by GNU C version 2.95.3 20010315 (release).
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
/project/xana/gcc-3.4.3/bin/../lib/gcc/mips/3.4.3/../../../../mips/bin/as -G 0
-EL -mips4 -O2 -g -no-mdebug -32 -march=rm9k -v -o image-ver.o image-ver.s
GNU assembler version 050111 (mips) using BFD version 050111 20050111
Mehmet Ali EKICI
Office Belgium: +32 3 240 37 46
Office Turkey: +90 216 579 24 07
Mobile: +90 532 740 18 79
[EMAIL PROTECTED]
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