linux - Using -dynamic-linker with a linker script? -

linux - Using -dynamic-linker with a linker script? -

i using linux 2.6.31-14 on intel 32-bit processor.

c file:

#include <stdio.h> main() { printf("hello world!\n"); }

linker script:

sections{ .text 0x00000100 :{ *(.text) } }

output:

$ gcc -s test.c $ -o test.o test.s $ ld -t linker.ld -dynamic-linker /lib/ld-linux.so.2 -o test test.o test.o: in function `main': test.c:(.text+0x11): undefined reference `puts'

what wrong? how can create linker script utilize dynamic c library?

i think should link programme c standard library (libc.so) adding -lc alternative ld arguments.

ld -t linker.ld -lc -dynamic-linker /lib/ld-linux.so.2 -o test test.o

also may have problems running programme (segmentation faults) because test.o have no programme entry point (_start symbol). need additional object file entry point calling main() function within test.o , termitates code execution calling exit() scheme call.

here start.s code

# linux scheme calls constants .equ syscall_exit, 1 .equ interrupt_linux_syscall, 0x80 # code section .section .text .globl _start _start: # programme entry point phone call main # calling main function # calling exit() scheme phone call movl %eax, %ebx # saving homecoming value exit() argument movl $syscall_exit, %eax # scheme phone call number int $interrupt_linux_syscall # raising programm interrupt

then should build program

gcc test.c -s test.s -o test.o start.s -o start.o ld start.o test.o -o test -lc --dynamic-linker=/lib/ld-linux.so.2

you may want check out article https://blogs.oracle.com/ksplice/entry/hello_from_a_libc_free larn more how c compiler , standard library works.

linux linker ld linker-scripts