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/*
* Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of Hyra nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _MACHINE_FRAMEASM_H_
#define _MACHINE_FRAMEASM_H_
/*
* If the interrupt has an error code, this macro shall
* be used to create the trapframe.
*
* XXX: A trapframe created with this must be popped with
* pop_trapframe_ec
*/
.macro push_trapframe_ec trapno
push %r15
push %r14
push %r13
push %r12
push %r11
push %r10
push %r9
push %r8
push %rbp
push %rdi
push %rsi
push %rbx
push %rdx
push %rcx
push %rax
push \trapno
.endm
/*
* If the interrupt has an error code, this macro shall
* be used to cleanup the trapframe.
*/
.macro pop_trapframe_ec
add $8, %rsp /* Trapno */
pop %rax
pop %rcx
pop %rdx
pop %rbx
pop %rsi
pop %rdi
pop %rbp
pop %r8
pop %r9
pop %r10
pop %r11
pop %r12
pop %r13
pop %r14
pop %r15
.endm
/*
* If the interrupt has no error code, this macro
* shall be used to create the trapframe.
*
* XXX: A trapframe created with this must be popped
* with pop_trapframe
*/
.macro push_trapframe trapno
push $0
push_trapframe_ec \trapno
.endm
/*
* If the interrupt has no error code, this macro shall
* be used to cleanup the trapframe.
*/
.macro pop_trapframe
pop_trapframe_ec
add $8, %rsp /* Pop error code */
.endm
/*
* Generic interrupt entry.
*/
#define INTRENTRY(ENTLABEL, HANDLER) \
ENTLABEL: \
testq $0x3, 8(%rsp) ; \
jz 1f ; \
lfence ; \
swapgs ; \
1: push_trapframe $0 ; \
mov %rsp, %rdi ; \
call HANDLER ; \
pop_trapframe ; \
testq $0x3, 8(%rsp) ; \
jz 2f ; \
lfence ; \
swapgs ; \
2: iretq
/*
* Trap entry where an error code is on
* the stack.
*/
#define TRAPENTRY(ENTLABEL, TRAPNO) \
ENTLABEL: \
testq $0x3, 16(%rsp) ; \
jz 1f ; \
lfence ; \
swapgs ; \
1: push_trapframe_ec TRAPNO ; \
mov %rsp, %rdi ; \
call trap_handler ; \
pop_trapframe_ec ; \
testq $0x3, 16(%rsp) ; \
jz 2f ; \
lfence ; \
swapgs ; \
2: iretq
#endif /* !_MACHINE_FRAMEASM_H_ */
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