conclusion

05/musl-0.6.0/crt/i386/crt1.s

@@ -0,0 +1,17 @@
+.text
+.global _start
+_start:
+	xorl %ebp,%ebp
+	popl %ecx
+	movl %esp,%eax
+	andl $-16,%esp
+	pushl %esp
+	pushl %esp
+	pushl %edx
+	pushl $0
+	pushl $0
+	pushl %eax
+	pushl %ecx
+	pushl $main
+	call __libc_start_main
+.L0:	jmp .L0

05/musl-0.6.0/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