20bbd81201
As discussed on the mailing list and voted upon, the coreboot project is going to move the majority of copyrights out of the headers and into an AUTHORS file. This will happen a bit at a time, as we'll be unifying license headers at the same time. Signed-off-by: Martin Roth <martin@coreboot.org> Change-Id: Ifd4329905847d9dd06de67b9a443c8ee50c0e7a7 Reviewed-on: https://review.coreboot.org/c/coreboot/+/35177 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
53 lines
1.3 KiB
ArmAsm
53 lines
1.3 KiB
ArmAsm
/*
|
|
* This file is part of the coreboot project.
|
|
*
|
|
* 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; version 2 of the License.
|
|
*
|
|
* 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.
|
|
*/
|
|
.code32
|
|
.text
|
|
|
|
/*
|
|
* stack layout after pushad:
|
|
* +------------+
|
|
* | save stack | <-- esp + 0x28
|
|
* +------------+
|
|
* | new stack | <-- esp + 0x24
|
|
* +------------+
|
|
* | ret addr | <-- esp + 0x20
|
|
* +------------+
|
|
* | eax | <-- esp + 0x1c
|
|
* +------------+
|
|
* | ecx | <-- esp + 0x18
|
|
* +------------+
|
|
* | edx | <-- esp + 0x14
|
|
* +------------+
|
|
* | ebx | <-- esp + 0x10
|
|
* +------------+
|
|
* | orig esp | <-- esp + 0x0c
|
|
* +------------+
|
|
* | ebp | <-- esp + 0x08
|
|
* +------------+
|
|
* | esi | <-- esp + 0x04
|
|
* +------------+
|
|
* | edi | <-- esp + 0x00
|
|
* +------------+
|
|
*/
|
|
.globl switch_to_thread
|
|
switch_to_thread:
|
|
pusha
|
|
/* Save the current stack */
|
|
movl 0x28(%esp), %ebx
|
|
movl %esp, (%ebx)
|
|
/* Switch to the new stack. */
|
|
movl 0x24(%esp), %eax
|
|
movl %eax, %esp
|
|
popa
|
|
ret
|