Nasm - 符号`printf'在R_X86_64_PC32重定位中导致溢出 [英] Nasm - Symbol `printf' causes overflow in R_X86_64_PC32 relocation

问题描述

我正在尝试在nasm中创建一个简单的应该显示字母 a 的程序。但是，它给了我一个Segfault并说这个：

  ./ a.out：符号`printf'在R_X86_64_PC32中导致溢出重定位
分段错误（核心转储）
  

基本上，我试图将值 0x61 （字母a的十六进制）写入内存地址1234，然后将其作为参数传递给printf。这是我确切的代码：

  extern printf 
 section .text 
全局主元
 main ：
 push rbp 
 mov rax，0 
 mov qword [1234]，0x61;移动0x61到地址1234 
 mov rdi，qword [1234]; mov地址1234到rdi 
调用printf;应打印信件a 
 pop rbp 
 mov rax，0 
 ret 
  

我正在运行Linux x86_64

解决方案

尝试编译 -no-pie ，查看这些帖子的解释：
使用GCC进行组装会导致怪异的数据重定位错误

Debian在64位模式下切换到PIC / PIE二进制文件& GCC在你的情况下
试图链接你的对象作为PIC，但是它会在mov $ str，％rdi中遇到绝对的
地址。

I am trying to create a simple program in nasm that should display the letter a. however, It is giving me a Segfault and saying this:

./a.out: Symbol `printf' causes overflow in R_X86_64_PC32 relocation
Segmentation fault (core dumped)

Basically, I am trying to move the value 0x61 (hex for letter a) into memory address 1234, and then pass that as an argument to printf. Here is my exact code:

extern printf
section .text
global main
main:
push rbp
mov rax,0
mov qword [1234], 0x61 ; move 0x61 into address 1234
mov rdi, qword [1234] ; mov address 1234 into rdi
call printf ; should print the letter a
pop rbp
mov rax,0
ret

I am running Linux x86_64

解决方案

try compiling with -no-pie, check out these posts for explanation: Assembling with GCC causes weird relocation error with regards to .data

in short:

Debian switched to PIC/PIE binaries in 64-bits mode & GCC in your case is trying to link your object as PIC, but it will encounter absolute address in mov $str, %rdi.

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