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69 lines
1.8 KiB
ArmAsm
69 lines
1.8 KiB
ArmAsm
/*
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* This file is part of open_agb_firm
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* Copyright (C) 2021 derrek, profi200
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "asm_macros.h"
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.syntax unified
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.arm
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.cpu mpcore
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.fpu vfpv2
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@ void switchContextNoScratchRegs(u32 *curRegs, const u32 *newRegs)
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/*ASM_FUNC switchContextNoScratchRegs
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stmia r0!, {r4-r11, sp, lr}
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add r0, r0, #20 @ Skip r0-r3, r12
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adr r2, switchContextNoScratchRegs_end
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mrs r3, cpsr
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stmia r0, {r2, r3}
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ldmia r1!, {r4-r11, sp, lr}
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add r1, r1, #20 @ Skip r0-r3, r12
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rfeia r1
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switchContextNoScratchRegs_end:
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cpsie i
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bx lr
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@ void switchContextAllRegs(u32 *curRegs, const u32 *newRegs)
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ASM_FUNC switchContextAllRegs
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stmia r0!, {r4-r11, sp, lr}
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add r0, r0, #20 @ Skip r0-r3, r12
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adr r2, switchContextAllRegs_end
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mrs r3, cpsr
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stmia r0, {r2, r3}
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ldmia r1!, {r4-r11, sp, lr}
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ldr r3, [r1, #24] @ cpsr
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cps #19 @ SVC mode
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msr spsr_fsxc, r3
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ldmia r1, {r0-r3, r12, pc}^
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switchContextAllRegs_end:
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cpsie i
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bx lr*/
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@ KRes switchContext(KRes res, uintptr_t *oldSp, uintptr_t newSp);
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BEGIN_ASM_FUNC switchContext
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stmfd sp!, {r4-r11, lr}
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str sp, [r1]
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mov sp, r2
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ldmfd sp!, {r4-r11, lr}
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bx lr
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END_ASM_FUNC
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.pool
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