diff options
Diffstat (limited to 'crt/x86_64/crt1.s')
| -rw-r--r-- | crt/x86_64/crt1.s | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/crt/x86_64/crt1.s b/crt/x86_64/crt1.s new file mode 100644 index 00000000..45cbb9db --- /dev/null +++ b/crt/x86_64/crt1.s @@ -0,0 +1,16 @@ +/* Written 2011 Nicholas J. Kain, released as Public Domain */ +.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 */ + xor %r8,%r8 /* 5th arg: always 0 */ + xor %rcx,%rcx /* 4th arg: always 0 */ + mov $main,%rdi /* 1st arg: application entry ip */ + call __libc_start_main /* musl init will run the program */ +.L0: jmp .L0 |