Hello. I wrote hello2 in C. void __attribute__((section(".isp"))) hello2(void) { printf("hello world \n"); } also. I wrote a file of ld srcipt in the below(mem.ld) refer to below I called hello2 function in main() int main(void) { initHw(); IsrInit(); enx_shell_init(); mtspr(SPR_SR, mfspr(SPR_SR)|SPR_SR_IEE); //enable global irq timer_tick_init(CPU_CLK,TIME_TICK); //100Hz TIME TICK timer_init(NULL); hello2(); } I disassembled this firmware. Disassembly of section .isp.text: b0000000 : b0000000: d7 e1 4f fc l.sw 0xfffffffc(r1),r9 b0000004: 9c 21 ff fc l.addi r1,r1,0xfffffffc b0000008: 18 60 00 0e l.movhi r3,0xe b000000c: 9c 21 00 04 l.addi r1,r1,0x4 b0000010: 85 21 ff fc l.lwz r9,0xfffffffc(r1) b0000014: 00 00 a8 66 l.j b002a1ac b0000018: a8 63 0b e4 l.ori r3,r3,0xbe4 00019698 : 19698: d7 e1 4f fc l.sw 0xfffffffc(r1),r9 1969c: d7 e1 17 f8 l.sw 0xfffffff8(r1),r2 196a0: 9c 21 ff ec l.addi r1,r1,0xffffffec 196a4: 07 ff ff b7 l.jal 19580 196a8: 9c 40 00 1e l.addi r2,r0,0x1e 196ac: 04 00 00 cc l.jal 199dc 196b0: 15 00 00 00 l.nop 0x0 196b4: 04 00 0f df l.jal 1d630 196b8: 15 00 00 00 l.nop 0x0 196bc: 07 ff 9f e7 l.jal 1658 196c0: 9c 60 00 11 l.addi r3,r0,0x11 196c4: 9c 60 00 11 l.addi r3,r0,0x11 196c8: 07 ff 9f e1 l.jal 164c 196cc: a8 8b 00 04 l.ori r4,r11,0x4 196d0: 18 60 08 0b l.movhi r3,0x80b 196d4: 9c 80 00 64 l.addi r4,r0,0x64 196d8: 04 00 04 6d l.jal 1a88c 196dc: a8 63 ef c0 l.ori r3,r3,0xefc0 196e0: 04 00 04 c0 l.jal 1a9e0 196e4: 9c 60 00 00 l.addi r3,r0,0x0 196e8: 07 ff 9a 46 l.jal 0 196ec: 15 00 00 00 l.nop 0x0 Disassebled main fucntion called hello2() like above. 196e8: 07 ff 9a 46 l.jal 0 I think that main() should call hello2() with l.jal 0xb0000000 What's wrong ? I used or32-elf-gcc 4.5.1 rc4. Thank you. This file is mem.ld MEMORY { reset : ORIGIN = 0x0000000, LENGTH = 0x1000 /* LENGTH shold not exceed 0x1000 */ emem : ORIGIN = 0x00001000, LENGTH = (0x200000) - 0x1000 /* CPU_SIZE - reset */ ispm : ORIGIN = 0xb0000000, LENGTH = ( 1024) ram : ORIGIN = 0xb0000000, LENGTH = ( 32*1024) /* RAM0_SIZE */ ram1 : ORIGIN = 0xb1000000, LENGTH = ( 64*1024) } SECTIONS { .reset : { } > reset .text : { *(.text) *(.rodata) *(.rodata.*) } > emem .isp.text : AT ( (LOADADDR(.text) + SIZEOF(.text) + 3) & ~ (4-1) ) { __isp_text_s = ALIGN(4); *(.isp) __isp_text_e = ALIGN(4); } > ispm __rom_isp_text_s = LOADADDR(.isp.text); __rom_isp_text_e = ( (LOADADDR(.isp.text) + SIZEOF(.isp.text) + 3) & ~ (4-1) ) - LOADADDR(.reset); .data : AT ( (LOADADDR(.isp.text) + SIZEOF(.isp.text) + 3) & ~ (4-1) ) { __data_s = ALIGN(4); *(.data) *(.data.rel) *(.data.rel.local) *(.sdata) __data_e = ALIGN(4); } > emem __rom_data_s = LOADADDR(.data); __rom_data_e = ( (LOADADDR(.data) + SIZEOF(.data) + 3) & ~ (4-1) ) - LOADADDR(.reset); .bss (NOLOAD) : { __bss_s = ALIGN(4); *(.bss) *(COMMON) __bss_e = ALIGN(4); } > emem __end = .; __except_stack = (0xb0000000+64*1024-4); __isr_stack = (0xb0000000+32*1024-4);/*__except_stack - 16*1024;*/ .stack (0xb1000000 + 64*1024-4) (NOLOAD) : /* RAM0_BASE + RAM0_SIZE - 4 */ { __stack = .; *(._stack) } }

Hello. I wrote hello2 in C. void __attribute__((section(".isp"))) hello2(void) { printf("hello world \n"); } also. I wrote a file of ld srcipt in the below(mem.ld) refer to below I called hello2 function in main() int main(void) { initHw(); IsrInit(); enx_shell_init(); mtspr(SPR_SR, mfspr(SPR_SR)|SPR_SR_IEE); //enable global irq timer_tick_init(CPU_CLK,TIME_TICK); //100Hz TIME TICK timer_init(NULL); hello2(); ... } I disassembled this firmware. Disassembly of section .isp.text: b0000000 : b0000000: d7 e1 4f fc l.sw 0xfffffffc(r1),r9 b0000004: 9c 21 ff fc l.addi r1,r1,0xfffffffc b0000008: 18 60 00 0e l.movhi r3,0xe b000000c: 9c 21 00 04 l.addi r1,r1,0x4 b0000010: 85 21 ff fc l.lwz r9,0xfffffffc(r1) b0000014: 00 00 a8 66 l.j b002a1ac b0000018: a8 63 0b e4 l.ori r3,r3,0xbe4 00019698 : 19698: d7 e1 4f fc l.sw 0xfffffffc(r1),r9 1969c: d7 e1 17 f8 l.sw 0xfffffff8(r1),r2 196a0: 9c 21 ff ec l.addi r1,r1,0xffffffec 196a4: 07 ff ff b7 l.jal 19580 196a8: 9c 40 00 1e l.addi r2,r0,0x1e 196ac: 04 00 00 cc l.jal 199dc 196b0: 15 00 00 00 l.nop 0x0 196b4: 04 00 0f df l.jal 1d630 196b8: 15 00 00 00 l.nop 0x0 196bc: 07 ff 9f e7 l.jal 1658 196c0: 9c 60 00 11 l.addi r3,r0,0x11 196c4: 9c 60 00 11 l.addi r3,r0,0x11 196c8: 07 ff 9f e1 l.jal 164c 196cc: a8 8b 00 04 l.ori r4,r11,0x4 196d0: 18 60 08 0b l.movhi r3,0x80b 196d4: 9c 80 00 64 l.addi r4,r0,0x64 196d8: 04 00 04 6d l.jal 1a88c 196dc: a8 63 ef c0 l.ori r3,r3,0xefc0 196e0: 04 00 04 c0 l.jal 1a9e0 196e4: 9c 60 00 00 l.addi r3,r0,0x0 196e8: 07 ff 9a 46 l.jal 0 196ec: 15 00 00 00 l.nop 0x0 Disassebled main fucntion called hello2() like above. 196e8: 07 ff 9a 46 l.jal 0 I think that main() should call hello2() with l.jal 0xb0000000 What's wrong ? I used or32-elf-gcc 4.5.1 rc4. Thank you. This file is mem.ld MEMORY { reset : ORIGIN = 0x0000000, LENGTH = 0x1000 /* LENGTH shold not exceed 0x1000 */ emem : ORIGIN = 0x00001000, LENGTH = (0x200000) - 0x1000 /* CPU_SIZE - reset */ ispm : ORIGIN = 0xb0000000, LENGTH = ( 1024) ram : ORIGIN = 0xb0000000, LENGTH = ( 32*1024) /* RAM0_SIZE */ ram1 : ORIGIN = 0xb1000000, LENGTH = ( 64*1024) } SECTIONS { .reset : { } > reset .text : { *(.text) *(.rodata) *(.rodata.*) } > emem .isp.text : AT ( (LOADADDR(.text) + SIZEOF(.text) + 3) & ~ (4-1) ) { __isp_text_s = ALIGN(4); *(.isp) __isp_text_e = ALIGN(4); } > ispm __rom_isp_text_s = LOADADDR(.isp.text); __rom_isp_text_e = ( (LOADADDR(.isp.text) + SIZEOF(.isp.text) + 3) & ~ (4-1) ) - LOADADDR(.reset); .data : AT ( (LOADADDR(.isp.text) + SIZEOF(.isp.text) + 3) & ~ (4-1) ) { __data_s = ALIGN(4); *(.data) *(.data.rel) *(.data.rel.local) *(.sdata) __data_e = ALIGN(4); } > emem __rom_data_s = LOADADDR(.data); __rom_data_e = ( (LOADADDR(.data) + SIZEOF(.data) + 3) & ~ (4-1) ) - LOADADDR(.reset); .bss (NOLOAD) : { __bss_s = ALIGN(4); *(.bss) *(COMMON) __bss_e = ALIGN(4); } > emem __end = .; __except_stack = (0xb0000000+64*1024-4); __isr_stack = (0xb0000000+32*1024-4);/*__except_stack - 16*1024;*/ .stack (0xb1000000 + 64*1024-4) (NOLOAD) : /* RAM0_BASE + RAM0_SIZE - 4 */ { __stack = .; *(._stack) } }

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