| /* |
| * Copyright (C) 2008 Daniel Verkamp <daniel@drv.nu>. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of the |
| * License, or any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| * 02110-1301, USA. |
| */ |
| |
| FILE_LICENCE ( GPL2_OR_LATER ) |
| |
| #include "librm.h" |
| |
| .text |
| |
| .code32 |
| .globl com32_farcall_wrapper |
| com32_farcall_wrapper: |
| movl $VIRTUAL(com32_farcall), %eax |
| jmp com32_wrapper |
| |
| .code32 |
| .globl com32_cfarcall_wrapper |
| com32_cfarcall_wrapper: |
| movl $VIRTUAL(com32_cfarcall), %eax |
| jmp com32_wrapper |
| |
| .code32 |
| .globl com32_intcall_wrapper |
| com32_intcall_wrapper: |
| movl $VIRTUAL(com32_intcall), %eax |
| /* fall through */ |
| |
| .code32 |
| com32_wrapper: |
| |
| /* Disable interrupts */ |
| cli |
| |
| /* Switch to internal virtual address space */ |
| call _phys_to_virt |
| |
| #ifdef __x86_64__ |
| |
| .code64 |
| |
| /* Preserve registers which are callee-save for COM32 (i386 API) */ |
| pushq %rdi |
| pushq %rsi |
| pushq %rbp |
| |
| /* Extract parameters from stack */ |
| movl 28(%rsp), %edi |
| movl 32(%rsp), %esi |
| movl 36(%rsp), %edx |
| |
| /* Align stack pointer */ |
| movq %rsp, %rbp |
| andq $~0x07, %rsp |
| |
| /* Call helper function */ |
| movslq %eax, %rax |
| call *%rax |
| |
| /* Restore stack pointer */ |
| movq %rbp, %rsp |
| |
| /* Restore registers */ |
| popq %rbp |
| popq %rsi |
| popq %rdi |
| |
| #else /* _x86_64 */ |
| |
| /* Call helper function */ |
| pushl 12(%esp) |
| pushl 12(%esp) |
| pushl 12(%esp) |
| call *%eax |
| addl $12, %esp |
| |
| #endif /* _x86_64 */ |
| |
| /* Switch to external flat physical address space */ |
| call _virt_to_phys |
| .code32 |
| |
| /* Reenable interrupts and return */ |
| sti |
| ret |
