1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* Functions to call MRC.bin from x86_64 */ 3 4.text 5.code32 6 .section ".text.mrc_wrapper", "ax", @progbits 7 .globl mrc_wrapper 8mrc_wrapper: 9 /* Set up new stack frame */ 10 pushal 11 mov %esp, %ebp 12 13 /* Align stack */ 14 andl $0xfffffff0, %esp 15 16 movl 36(%ebp), %ebx /* Get function pointer */ 17 movl 40(%ebp), %eax /* Get argument */ 18 19 call *%ebx 20 21 /* Place return value on stack so that popal fetches it */ 22 movl %eax, 28(%ebp) 23 24 /* Restore stack pointer */ 25 mov %ebp, %esp 26 popal 27 ret 28 29 /* 30 * Callback for MRC to print a character on the console. 31 * As MRC is x86_32 call into long mode and use the x86_64 32 * function do_putchar to print to console. 33 */ 34 35#include <src/cpu/x86/64bit/prot2long.inc> 36 37prot2lm_wrapper do_putchar 38