blob: d68ce091a432cf9d1c4ef2671824bd6ac163f52b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
/* SPDX-License-Identifier: GPL-2.0-only */
/* Functions to call MRC.bin from x86_64 */
.text
.code32
.section ".text.mrc_wrapper", "ax", @progbits
.globl mrc_wrapper
mrc_wrapper:
/* Set up new stack frame */
pushal
mov %esp, %ebp
/* Align stack */
andl $0xfffffff0, %esp
movl 36(%ebp), %ebx /* Get function pointer */
movl 40(%ebp), %eax /* Get argument */
call *%ebx
/* Place return value on stack so that popal fetches it */
movl %eax, 28(%ebp)
/* Restore stack pointer */
mov %ebp, %esp
popal
ret
/*
* Callback for MRC to print a character on the console.
* As MRC is x86_32 call into long mode and use the x86_64
* function do_putchar to print to console.
*/
#include <src/cpu/x86/64bit/prot2long.inc>
prot2lm_wrapper do_putchar
|
