mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-23 12:22:08 +00:00
85 lines
No EOL
2.1 KiB
ArmAsm
85 lines
No EOL
2.1 KiB
ArmAsm
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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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.section .crt0._ZN3ams6nxboot6loader5StartEv, "ax", %progbits
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.arm
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.align 5
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.global _ZN3ams6nxboot6loader5StartEv
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.type _ZN3ams6nxboot6loader5StartEv, %function
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_ZN3ams6nxboot6loader5StartEv:
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/* Switch to system mode, mask all interrupts, clear all flags */
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msr cpsr_cxsf, #0xDF
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/* Relocate main program. */
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ldr r0, =_ZN3ams6nxboot6loader5StartEv
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adr r1, _ZN3ams6nxboot6loader5StartEv
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cmp r0, r1
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beq 3f
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/* Relocate first 0x100. */
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mov r4, #0x100
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0:
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ldmia r1!, {r5-r12}
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stmia r0!, {r5-r12}
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subs r4, #0x20
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bne 0b
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/* Jump, continue relocating. */
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ldr r3, =1f
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bx r3
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1:
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ldr r4, =__loader_stub_lma__
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ldr r3, =__loader_stub_end__
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add r4, r4, r3
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ldr r3, =__loader_stub_start__
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sub r4, r4, r3
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sub r4, r4, r0
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2:
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ldmia r1!, {r5-r12}
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stmia r0!, {r5-r12}
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subs r4, #0x20
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bne 2b
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/* Relocate loader stub. */
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3:
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ldr r2, =__loader_stub_lma__
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ldr r3, =__loader_stub_start__
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ldr r4, =__loader_stub_end__
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sub r4, r4, r3
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4:
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ldmia r2!, {r5-r12}
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stmia r3!, {r5-r12}
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subs r4, #0x20
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bne 4b
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/* Set the stack pointer */
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ldr sp, =0x40001000
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mov fp, #0
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/* Generate arguments. */
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ldr r3, =program_lz4
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ldr r4, =program_lz4_end
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sub r4, r4, r3
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mov r0, r3
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mov r1, r4
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/* Jump to the loader stub. */
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ldr r3, =_ZN3ams6nxboot6loader20UncompressAndExecuteEPKvj
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bx r3 |