ADD: charge basics stuff.

3 files changed, 32 insertions, 0 deletions

@@ -0,0 +1,6 @@
+int main(int argc, char** argv);
+
+int main(int argc, char** argv)
+{
+        return 0;
+}
@@ -0,0 +1,9 @@
+.section .note.netbsd.ident, "a" # allocatable section.
+        .align 4
+        .int 7 # namesz = "NetBSD" = 7 bytes.
+        .int 4 # descsz = version = 4 bytes.
+        .int 1 # type = ELF_NOTE_TYPE_NETBSD_TAG.
+        .ascii "NetBSD" # name.
+        .byte 0 # null term for name.
+        .long 110000000 # desc = 11.0 (netbsd ver).
+        .align 4
@@ -0,0 +1,17 @@
+.section .text
+.globl _start
+.type _start, @function
+_start:
+        xorq %rbp, %rbp # frame ptr (%rbp) = null. marks stack bottom.
+
+        movl (%rsp), %edi # argc = first 4 bytes of stack.
+        leaq 8(%rsp), %rsi # argv = address of first arg ptr.
+
+        call main # see main.c.
+
+        movl %eax, %edi # status = ret val.
+        movl $1, %eax # SYS_exit = 1.
+        syscall
+
+        .size _start, .-_start
+        hlt # if syscall fails hang.