Имею:
- IAR6.21
- STM32F107VC
- ST-LinkV2
Проблема возникает при работе со static переменнымми, например:
Код
int test( int b )
{
static int hello = 0xAABB;
hello ++;
return hello;
}
int main( void )
{
while( 1 )
{
for( int i = 0x00; i < 100000; i ++ );
(void) test( 1 );
}
}
{
static int hello = 0xAABB;
hello ++;
return hello;
}
int main( void )
{
while( 1 )
{
for( int i = 0x00; i < 100000; i ++ );
(void) test( 1 );
}
}
Почему-то переменная hello инициализируется не значением 0xAABB, а имеет значение 0x20010000. На Asm под отладчиком это выглядит так:
Код
int test( int b )
{
test:
0x80001dc: 0x0001 MOVS R1, R0
hello ++;
0x80001de: 0x4809 LDR.N R0, ??DataTable1 ; ??hello
0x80001e0: 0x6800 LDR R0, [R0]
0x80001e2: 0x1c40 ADDS R0, R0, #1
0x80001e4: 0x4a07 LDR.N R2, ??DataTable1 ; ??hello
0x80001e6: 0x6010 STR R0, [R2]
return hello;
0x80001e8: 0x4806 LDR.N R0, ??DataTable1 ; ??hello
0x80001ea: 0x6800 LDR R0, [R0]
0x80001ec: 0x4770 BX LR
-------------------------
??DataTable1:
0x8000204: 0x0000 MOVS R0, R0
0x8000206: 0x2000 MOVS R0, #0
-------------------------
SB:
0x800029a: 0x0000 MOVS R0, R0
0x800029c: 0xaabb ADD R2, SP, #0x2ec
0x800029e: 0x0000 MOVS R0, R0
{
test:
0x80001dc: 0x0001 MOVS R1, R0
hello ++;
0x80001de: 0x4809 LDR.N R0, ??DataTable1 ; ??hello
0x80001e0: 0x6800 LDR R0, [R0]
0x80001e2: 0x1c40 ADDS R0, R0, #1
0x80001e4: 0x4a07 LDR.N R2, ??DataTable1 ; ??hello
0x80001e6: 0x6010 STR R0, [R2]
return hello;
0x80001e8: 0x4806 LDR.N R0, ??DataTable1 ; ??hello
0x80001ea: 0x6800 LDR R0, [R0]
0x80001ec: 0x4770 BX LR
-------------------------
??DataTable1:
0x8000204: 0x0000 MOVS R0, R0
0x8000206: 0x2000 MOVS R0, #0
-------------------------
SB:
0x800029a: 0x0000 MOVS R0, R0
0x800029c: 0xaabb ADD R2, SP, #0x2ec
0x800029e: 0x0000 MOVS R0, R0
Скрипт линкера:
Код
/*###ICF### Section handled by ICF editor, don't touch! ****/
/*-Editor annotation file-*/
/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
/*-Specials-*/
define symbol __ICFEDIT_intvec_start__ = 0x08000000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
define symbol __ICFEDIT_region_ROM_end__ = 0x080FFFFF;
define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
define symbol __ICFEDIT_region_RAM_end__ = 0x20017FFF;
/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__ = 0x900;
define symbol __ICFEDIT_size_heap__ = 0x800;
/**** End of ICF editor section. ###ICF###*/
define memory mem with size = 4G;
define region ROM_region = mem:[from __ICFEDIT_region_ROM_start__ to __ICFEDIT_region_ROM_end__];
define region RAM_region = mem:[from __ICFEDIT_region_RAM_start__ to __ICFEDIT_region_RAM_end__];
define block CSTACK with alignment = 8, size = __ICFEDIT_size_cstack__ { };
define block HEAP with alignment = 8, size = __ICFEDIT_size_heap__ { };
initialize by copy { readwrite };
//initialize by copy with packing = none { section __DLIB_PERTHREAD }; // Required in a multi-threaded application
do not initialize { section .noinit };
place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
place in ROM_region { readonly };
place in RAM_region { readwrite, block CSTACK, block HEAP };
/*-Editor annotation file-*/
/* IcfEditorFile="$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml" */
/*-Specials-*/
define symbol __ICFEDIT_intvec_start__ = 0x08000000;
/*-Memory Regions-*/
define symbol __ICFEDIT_region_ROM_start__ = 0x08000000;
define symbol __ICFEDIT_region_ROM_end__ = 0x080FFFFF;
define symbol __ICFEDIT_region_RAM_start__ = 0x20000000;
define symbol __ICFEDIT_region_RAM_end__ = 0x20017FFF;
/*-Sizes-*/
define symbol __ICFEDIT_size_cstack__ = 0x900;
define symbol __ICFEDIT_size_heap__ = 0x800;
/**** End of ICF editor section. ###ICF###*/
define memory mem with size = 4G;
define region ROM_region = mem:[from __ICFEDIT_region_ROM_start__ to __ICFEDIT_region_ROM_end__];
define region RAM_region = mem:[from __ICFEDIT_region_RAM_start__ to __ICFEDIT_region_RAM_end__];
define block CSTACK with alignment = 8, size = __ICFEDIT_size_cstack__ { };
define block HEAP with alignment = 8, size = __ICFEDIT_size_heap__ { };
initialize by copy { readwrite };
//initialize by copy with packing = none { section __DLIB_PERTHREAD }; // Required in a multi-threaded application
do not initialize { section .noinit };
place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };
place in ROM_region { readonly };
place in RAM_region { readwrite, block CSTACK, block HEAP };
Буду благодарен за помощь!