diff options
| -rw-r--r-- | crt/x86_64/Scrt1.s | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/crt/x86_64/Scrt1.s b/crt/x86_64/Scrt1.s new file mode 100644 index 00000000..d8b71617 --- /dev/null +++ b/crt/x86_64/Scrt1.s @@ -0,0 +1,18 @@ +/* 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 |