IAR EWARM 7.8 使用 attribute 示例

2万 · 2016-11-25 20:49

#include <stdint.h>
uint32_t VarInSection __attribute__ ( (section (".Var")) );
uint8_t AlignedArray[ 128 ] __attribute__( ( aligned( 128 ) ) );
typedef struct
{
  uint8_t Var8a;
  uint16_t Var16a __attribute__( ( aligned( 8 ) ) );
  uint32_t Text[ 4 ];
} AlignedMember_TypeDef;
AlignedMember_TypeDef AlignedMember;
typedef struct __attribute__( (packed) )
{
  uint8_t Var8a;
  uint16_t Var16a;
  uint32_t Text[ 4 ];
} PackedStruct_TypeDef;
PackedStruct_TypeDef PackedStruct;
typedef struct
{
  uint8_t Var8a;
  uint16_t Var16a;
  uint32_t Text[ 4 ];
} __attribute__( (packed) ) PackedStruct2_TypeDef;
PackedStruct2_TypeDef PackedStruct2;
typedef struct __attribute__( (packed,  aligned( 128 ) ) )
{
  uint8_t Var8a;
  uint16_t Var16a;
  uint32_t Text[ 4 ];
} AlignedPackedStruct_TypeDef;
AlignedPackedStruct_TypeDef AlignedPackedStruct;
void Foo( void ) __attribute__ ( (section (".Foo")) );
void Foo( void )
{
  VarInSection = 0;
  AlignedArray[ 0 ] = 0;
  PackedStruct.Text[ 0 ] = 1;
  PackedStruct2.Text[ 0 ] = 1;
  AlignedMember.Var16a = 0;
  AlignedPackedStruct.Text[ 0 ] = 1;
}
// .textrw and .text
__root __ramfunc void ramfunc0(void)
{
}
// No effect : .ramfunc
__root void ramfunc1(void) __attribute__ ( (section(".ramfunc") ) );
__root void ramfunc1(void)
{
  ramfunc0();
}

2万 · 2016-11-25 20:50

*******************************************************************************
*** PLACEMENT SUMMARY
***
"A0":  place at 0x00000000 { ro section .intvec };
"P1":  place in [from 0x00000000 to 0x0007ffff] { ro };
"P3":  place in [from 0x00000000 to 0x00000000] |
            [from 0x20000000 to 0x2000ffff] {
      rw, block CSTACK, block PROC_STACK, block HEAP };
initialize by copy { rw };
  Section             Kind       Address Size  Object
  -------             ----       ------- ----  ------
"P1":                                     0x13a8
  .ramfunc             ro code  0x0000133c    0x4  __attribute__.o [1]
  .Foo                ro code  0x00001218 0x2c  __attribute__.o [1]
"P3", part 1 of 3:                            0xb0
.textrw          inited 0x200000ac    0x2  __attribute__.o [1]
"P3", part 2 of 3:                         0x142c
  .bss                zero    0x20001280 0x80  __attribute__.o [1]
  .bss                zero    0x20001300 0x80  __attribute__.o [1]
  .bss                zero    0x200014c4 0x14  __attribute__.o [1]
  .Var                zero    0x200014d8    0x4  __attribute__.o [1]
                           - 0x200014dc  0x142c
*******************************************************************************
*** ENTRY LIST
***
Entry                   Address Size  Type    Object
ramfunc1             0x0000133d    0x4  Code  Gb  __attribute__.o [1]
ramfunc0             0x200000ad    0x2  Code  Gb  __attribute__.o [1]
AlignedArray          0x20001280 0x80  Data  Gb  __attribute__.o [1]
AlignedPackedStruct    0x20001300 0x80  Data  Gb  __attribute__.o [1]
Foo                   0x00001219 0x2c  Code  Gb  __attribute__.o [1]
PackedStruct          0x200014c4 0x14  Data  Gb  __attribute__.o [1]
VarInSection          0x200014d8    0x4  Data  Gb  __attribute__.o [1]