c编译器，重叠内存错误

Question

下面是我正在使用的 C 代码的一部分:

pushbutton_ISR()
{

    int press;
    int key_pressed;

    press = *(KEYS_ptr + 3);                // read the pushbutton Edge Det Register interrupt register
    *(KEYS_ptr + 3) = 0;                    // Clear the Edge Det registers. 

    if (press & 0x1) {                      // KEY1
        key_pressed = KEY1;
        //sum = sum + *NEW_NUMBER; 
        }
    else if (press & 0x2)   {               // KEY2
        key_pressed = KEY2;
        *GREEN_LEDS = *NEW_NUMBER;
         sum = sum + *NEW_NUMBER;
        *RED_LEDS = sum;
        }
    else                                    // i.e. (press & 0x8), which is KEY3
        sum = *(NEW_NUMBER);                // Read the SW slider switch values; store in pattern

    return;
}

编译器可以很好地编译此代码，并且代码似乎可以正常运行(在 Altera 开发板上)。但是，当我将第一个 if 语句更改为:

if (press & 0x1) {                      // KEY1
    //key_pressed = KEY1;
    sum = sum + *NEW_NUMBER; 
}

编译器给出以下错误信息:

.../nios2-elf/bin/ld.exe: section .data loaded at [00000a00,00000e0f] overlaps section .text loaded at [00000500,00000a0f]
.../nios2-elf/bin/ld.exe: section .ctors loaded at [00000a10,00000a13] overlaps section .data loaded at [00000a00,00000e0f]
.../nios2-elf/bin/ld.exe: Z:/Projects/Altera/3215_W15_LabB/Part2/from_handout.elf: section .data vma 0xa00 overlaps previous sections
.../nios2-elf/bin/ld.exe: Z:/Projects/Altera/3215_W15_LabB/Part2/from_handout.elf: section .ctors vma 0xa10 overlaps previous sections
.../nios2-elf/bin/ld.exe: Z:/Projects/Altera/3215_W15_LabB/Part2/from_handout.elf: section .rodata vma 0xa14 overlaps previous sections
.../nios2-elf/bin/ld.exe: Z:/Projects/Altera/3215_W15_LabB/Part2/from_handout.elf: section .sdata vma 0xe10 overlaps previous sections
.../nios2-elf/bin/ld.exe: Z:/Projects/Altera/3215_W15_LabB/Part2/from_handout.elf: section .sbss vma 0xe18 overlaps previous sections

能否请您告诉我这些错误的原因以及解决方法。

Answer 1

这与您的代码不正确无关。

这些是关于输出部分重叠的链接器错误(它甚至告诉您 ld.exe 是程序在提示)。这可能 意味着您刚刚用完了空间，但也可能意味着您的项目正在使用的链接器指令文件存在一些问题。