linker - Mac OSX ld report 32-bit RIP relative reference out of range error for Absolute symbol -

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i'm trying combine objcopy clang toolchain. because objcopy of binutils 2.25 generates broken mach-o object file, edit generated object file using my shell script.

$ objcopy-comp.sh -i binary -o mach-o-x86-64 test test.o $ nm test.o 000000000000000b d _binary_test_end 000000000000000b _binary_test_size 0000000000000000 d _binary_test_start

however, link against c code fails error message.

$ clang main.c test.o ld: 32-bit rip relative reference out of range (-4294971146 max +/-4gb):    _main (0x100000ea0) _binary_test_size (0x0000000b)    in '_main' main.o architecture x86_64

(newlines inserted readbility)

here main.c.

#include <stdio.h> #include <stdlib.h> #include <string.h>  extern const unsigned char binary_test_start[]; extern const unsigned char binary_test_end[]; extern const unsigned char binary_test_size[];  int main(int argc, char *argv[]) {   size_t len = binary_test_end - binary_test_start;   char *data = calloc(len + 1, sizeof(char));   memcpy(data, binary_test_start, len);   data[len] = 0;   printf("%s %ld %d\n", data, len, (int)binary_test_size);   return 0; }

according nlist document,

n_abs (0x2)—the symbol absolute. linker not change value of absolute symbol.

but error message suggests linker try change value.

how protect absolute value linker?

the mach-oabi utilizes relative addressing x86_64. compiler interprets address you've used 32-bit out range, nor absolute. try compiling code i386 , might have better chance of success.

specifically how you're changing symbol types unknown since haven't shown commands you've used objcopy.


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