[mirror_edk2.git] / MdePkg / Library / BaseLib / Ia32 / LongJump.S

#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2008, Intel Corporation
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
# Module Name:
#
#   LongJump.S
#
# Abstract:
#
#   Implementation of _LongJump() on IA-32.
#
#------------------------------------------------------------------------------

.globl ASM_PFX(InternalLongJump)

#------------------------------------------------------------------------------
# VOID
# EFIAPI
# InternalLongJump (
#   IN      BASE_LIBRARY_JUMP_BUFFER  *JumpBuffer,
#   IN      UINTN                     Value
#   );
#------------------------------------------------------------------------------
ASM_PFX(InternalLongJump):
    pop     %eax                        # skip return address
    pop     %edx                        # edx <- JumpBuffer
    pop     %eax                        # eax <- Value
    movl    (%edx), %ebx
    movl    4(%edx), %esi
    movl    8(%edx), %edi
    movl    12(%edx), %ebp
    movl    16(%edx), %esp
    jmp     *20(%edx)                   # restore "eip"
Commit	Line	Data
f1baef62	1	#------------------------------------------------------------------------------
f1baef62	2	#
1f86b07d	3	# Copyright (c) 2006 - 2008, Intel Corporation
f1baef62	4	# All rights reserved. This program and the accompanying materials
	5	# are licensed and made available under the terms and conditions of the BSD License
	6	# which accompanies this distribution. The full text of the license may be found at
	7	# http://opensource.org/licenses/bsd-license.php
	8	#
	9	# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
	10	# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
	11	#
	12	# Module Name:
	13	#
1f86b07d	14	# LongJump.S
f1baef62	15	#
	16	# Abstract:
	17	#
	18	# Implementation of _LongJump() on IA-32.
	19	#
	20	#------------------------------------------------------------------------------
	21
	22	.globl ASM_PFX(InternalLongJump)
	23
	24	#------------------------------------------------------------------------------
	25	# VOID
	26	# EFIAPI
	27	# InternalLongJump (
	28	# IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer,
	29	# IN UINTN Value
	30	# );
	31	#------------------------------------------------------------------------------
	32	ASM_PFX(InternalLongJump):
57246fe0	33	pop %eax # skip return address
	34	pop %edx # edx <- JumpBuffer
	35	pop %eax # eax <- Value
f1baef62	36	movl (%edx), %ebx
	37	movl 4(%edx), %esi
	38	movl 8(%edx), %edi
	39	movl 12(%edx), %ebp
	40	movl 16(%edx), %esp
57246fe0	41	jmp *20(%edx) # restore "eip"