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PIE support for x86_64 (untested)

This commit is contained in:
Rich Felker 2012-05-02 21:14:41 -04:00
parent faab12bece
commit 94167cafd5
1 changed files with 18 additions and 0 deletions
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18
crt/x86_64/Scrt1.s Normal file
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/* Written 2011 Nicholas J. Kain, released as Public Domain */
.weak _init
.weak _fini
.text
.global _start
_start:
xor %rbp,%rbp /* rbp:undefined -> mark as zero 0 (ABI) */
mov %rdx,%r9 /* 6th arg: ptr to register with atexit() */
pop %rsi /* 2nd arg: argc */
mov %rsp,%rdx /* 3rd arg: argv */
andq $-16,%rsp /* align stack pointer */
push %rax /* 8th arg: glibc ABI compatible */
push %rsp /* 7th arg: glibc ABI compatible */
lea _fini(%rip),%r8 /* 5th arg: fini/dtors function */
lea _init(%rip),%rcx /* 4th arg: init/ctors function */
mov main@GOTPCREL(%rip),%rdi /* 1st arg: application entry ip */
call __libc_start_main@PLT /* musl init will run the program */
1: jmp 1b