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Remove the global trampoline table and add a small trampoline table next to each .text section instead

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This commit is contained in:
Maschell
2025-01-19 10:08:14 +01:00
parent c884b17695
commit aa7eb11013
13 changed files with 252 additions and 155 deletions
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20
source/utils/ElfUtils.cpp
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@@ -1,14 +1,16 @@
#include <coreinit/cache.h>
#include <cstdlib>
#include <cstring>
#include <vector>
#include "ElfUtils.h"
#include "utils/logger.h"
#include <coreinit/cache.h>
#include <span>
#include <cstdlib>
#include <cstring>
// See https://github.com/decaf-emu/decaf-emu/blob/43366a34e7b55ab9d19b2444aeb0ccd46ac77dea/src/libdecaf/src/cafe/loader/cafe_loader_reloc.cpp#L144
bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t destination, uint32_t symbol_addr,
std::vector<relocation_trampoline_entry_t> &trampolineData, RelocationType reloc_type, uint8_t trampolineId) {
std::span<relocation_trampoline_entry_t> trampolineData, RelocationType reloc_type) {
if (type == R_PPC_NONE) {
return true;
}
@@ -85,11 +87,10 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
relocation_trampoline_entry_t *freeSlot = nullptr;
for (auto &cur : trampolineData) {
// We want to override "old" relocations of imports
// Pending relocations have the status RELOC_TRAMP_IMPORT_IN_PROGRESS.
// When all relocations are done successfully, they will be turned into RELOC_TRAMP_IMPORT_DONE
// so they can be overridden/updated/reused on the next application launch.
//
// Relocations that won't change will have the status RELOC_TRAMP_FIXED and are set to free when the module is unloaded.
// Relocations that won't change will have the status RELOC_TRAMP_FIXED and are set to free when the plugin is unloaded.
if (cur.status == RELOC_TRAMP_FREE) {
freeSlot = &cur;
break;
@@ -119,9 +120,6 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
freeSlot->trampoline[3] = 0x4E800420; // bctr
ICInvalidateRange((unsigned char *) freeSlot->trampoline, sizeof(freeSlot->trampoline));
freeSlot->id = trampolineId;
ICInvalidateRange((unsigned char *) &freeSlot->id, sizeof(freeSlot->id));
if (reloc_type == RELOC_TYPE_FIXED) {
freeSlot->status = RELOC_TRAMP_FIXED;
} else {