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https://github.com/Atmosphere-NX/Atmosphere.git
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52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
/*
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* Copyright (c) 2018-2020 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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#include "chainloader.h"
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int g_chainloader_argc = 0;
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char g_chainloader_arg_data[CHAINLOADER_ARG_DATA_MAX_SIZE] = {0};
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chainloader_entry_t g_chainloader_entries[CHAINLOADER_MAX_ENTRIES] = {0}; /* keep them sorted */
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size_t g_chainloader_num_entries = 0;
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uintptr_t g_chainloader_entrypoint = 0;
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#pragma GCC optimize (3)
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static void *xmemmove(void *dst, const void *src, size_t len)
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{
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const uint8_t *src8 = (const uint8_t *)src;
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uint8_t *dst8 = (uint8_t *)dst;
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if (dst8 < src8) {
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for (size_t i = 0; i < len; i++) {
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dst8[i] = src8[i];
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}
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} else if (dst8 > src8) {
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for (size_t i = len; len > 0; len--)
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dst8[i - 1] = src8[i - 1];
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}
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return dst;
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}
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void relocate_and_chainload_main(void) {
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for(size_t i = 0; i < g_chainloader_num_entries; i++) {
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chainloader_entry_t *entry = &g_chainloader_entries[i];
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xmemmove((void *)entry->load_address, (const void *)entry->src_address, entry->size);
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}
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((void (*)(int, void *))g_chainloader_entrypoint)(g_chainloader_argc, g_chainloader_arg_data);
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}
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