Syncboot/gnu-efi/apps/trivial.S
Curle d588e232c4 Major overhaul of this branch.
This branch has been dedicated to purely the UEFI bootloader.
As such, all other code has been removed.

This code can be compiled with Visual Studio, gcc or llvm.
2019-07-17 21:10:29 +01:00

44 lines
902 B
ArmAsm

.text
.align 4
.globl _start
_start:
#if 0
pushl %ebp
movl %esp,%ebp
pushl %ebx # save ebx
movl 12(%ebp),%eax # eax <- systab
movl 24(%eax),%ebx # ebx <- systab->FirmwareVendor
pushl %ebx
movl 44(%eax),%ebx # ebx <- systab->ConOut
pushl %ebx
movl 4(%ebx),%eax # eax <- conout->OutputString
call *%eax
movl -4(%ebp),%ebx # restore ebx
leave
ret
#else
pushl %ebp
movl %esp,%ebp
pushl %ebx
call 0f
0: popl %eax
addl $hello-0b,%eax
pushl %eax
movl 12(%ebp),%eax # eax <- systab
movl 44(%eax),%ebx # ebx <- systab->ConOut
pushl %ebx
movl 4(%ebx),%eax # eax <- conout->OutputString
call *%eax
movl -4(%ebp),%ebx
leave
ret
.section .rodata
.align 2
hello: .byte 'h',0,'e',0,'l',0,'l',0,'o',0,'\n',0,'\r',0,0,0
#endif