diff options
Diffstat (limited to 'system/i386/start.S')
| -rw-r--r-- | system/i386/start.S | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/system/i386/start.S b/system/i386/start.S new file mode 100644 index 0000000..762e807 --- /dev/null +++ b/system/i386/start.S @@ -0,0 +1,37 @@ +.text +.global _start +_start: + popl %ecx /* %ecx = argc */ + movl %esp,%esi /* %esi = argv */ + pushl %ecx + leal 4(%esi,%ecx,4),%eax /* %eax = envp = (4*ecx)+%esi+4 */ + + pushl %eax + pushl %esi + pushl %ecx + movl %eax,environ + +#ifdef WANT_SYSENTER + movl %eax,%edx + xorl %esi,%esi +1: + add $4,%edx + cmpl %esi,-4(%edx) + jne 1b +1: + movl (%edx),%edi + test %edi,%edi + jz 1f + addl $8,%edx + cmpl $32,%edi + jne 1b + movl -4(%edx),%edi + movl %edi,__vsyscall +1: +#endif + + call main + pushl %eax + call exit + hlt /* die now ! will ya ... */ +.size _start,.-_start |