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- .text
- .global _dlstart
- _dlstart:
- mov (%rsp),%rdi /* move argc into 1st argument slot */
- lea 4(%rsp),%rsi /* move argv into 2nd argument slot */
- call __dynlink
- /* in case the dynlinker was called directly, it sets the "consumed"
- argv values to -1. so we must loop over the array as long as -1
- is in the top argv slot, decrement argc, and then set the stackpointer
- to the new argc as well as argc's new value.
- as the x32 abi has longs in the argv array, we cannot use push/pop.*/
- movl (%rsp),%edi /* copy argc into edi */
- xor %rdx,%rdx /* we use rdx as an offset to the current argv member */
- 1: dec %edi
- addl $4, %edx
- movl (%rsp, %rdx), %esi
- cmp $-1,%esi
- jz 1b
- inc %edi
- subl $4, %edx
- lea (%rsp, %rdx), %rsp /* set rsp to new argv[-1] */
- movl %edi, (%rsp) /* write new argc there */
- xor %edx,%edx
- jmp *%rax
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