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- /*
- * crt0-efi-loongarch64.S - PE/COFF header for LoongArch64 EFI applications
- *
- * Copyright (C) 2021 Loongson Technology Corporation Limited. <zhoumingtao@loongson.cn>
- * Copyright (C) 2014 Linaro Ltd. <ard.biesheuvel@linaro.org>
- *
- * 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 and this list of conditions, without modification.
- * 2. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License as published by the Free Software Foundation;
- * either version 2 of the License, or (at your option) any later version.
- */
- .text
- .align 12
- .globl _start
- .type _start, @function
- _start:
- addi.d $sp, $sp, -24
- st.d $ra, $sp, 0
- st.d $a0, $sp, 8
- st.d $a1, $sp, 16
- move $a2, $a0 // a2: ImageHandle
- move $a3, $a1 // a3: SystemTable
- la.local $a0, ImageBase // a0: ImageBase
- la.local $a1, _DYNAMIC // a1: DynamicSection
- bl _relocate
- bnez $a0, 0f
- ld.d $a0, $sp, 8
- ld.d $a1, $sp, 16
- bl _entry
- 0: ld.d $ra, $sp, 0
- addi.d $sp, $sp, 24
- jr $ra
- // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
- .data
- dummy: .4byte 0
- #define IMAGE_REL_ABSOLUTE 0
- .section .reloc, "a"
- label1:
- .4byte dummy-label1 // Page RVA
- .4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
- .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
- .2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
- #if defined(__ELF__) && defined(__linux__)
- .section .note.GNU-stack,"",%progbits
- #endif
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