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Fix R_PPC_REL24 relocations

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Maschell 2021-09-18 12:01:04 +02:00
parent f5c8df9416
commit 30d7e3b7bd
2 changed files with 9 additions and 10 deletions
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10
relocator/src/ElfUtils.cpp
View File

@ -91,14 +91,15 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
break; break;
} }
} }
if (freeSlot != NULL) { if (freeSlot == nullptr) {
DEBUG_FUNCTION_LINE("***24-bit relative branch cannot hit target. Trampolin data list is full\n"); DEBUG_FUNCTION_LINE("***24-bit relative branch cannot hit target. Trampolin data list is full\n");
DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, distance); DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, (target - (uint32_t) &(freeSlot->trampolin[0])));
return false; return false;
} }
if (target - (uint32_t) &(freeSlot->trampolin[0]) > 0x1FFFFFC) { if (target - (uint32_t) &(freeSlot->trampolin[0]) > 0x1FFFFFC) {
DEBUG_FUNCTION_LINE("**Cannot link 24-bit jump (too far to tramp buffer)."); DEBUG_FUNCTION_LINE("**Cannot link 24-bit jump (too far to tramp buffer).");
DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, distance); DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, (target - (uint32_t) &(freeSlot->trampolin[0])));
return false; return false;
} }
@ -113,12 +114,11 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
freeSlot->status = RELOC_TRAMP_FIXED; freeSlot->status = RELOC_TRAMP_FIXED;
} else { } else {
// Relocations for the imports may be overridden // Relocations for the imports may be overridden
freeSlot->status = RELOC_TRAMP_IMPORT_IN_PROGRESS; freeSlot->status = RELOC_TRAMP_IMPORT_DONE;
} }
auto symbolValue = (uint32_t) &(freeSlot->trampolin[0]); auto symbolValue = (uint32_t) &(freeSlot->trampolin[0]);
value = symbolValue + addend; value = symbolValue + addend;
distance = static_cast<int32_t>(value) - static_cast<int32_t>(target); distance = static_cast<int32_t>(value) - static_cast<int32_t>(target);
DEBUG_FUNCTION_LINE("Created tramp\n");
} }
} }

9
source/ElfUtils.cpp
View File

@ -196,14 +196,14 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
break; break;
} }
} }
if (freeSlot != NULL) { if (freeSlot == nullptr) {
DEBUG_FUNCTION_LINE("***24-bit relative branch cannot hit target. Trampolin data list is full\n"); DEBUG_FUNCTION_LINE("***24-bit relative branch cannot hit target. Trampolin data list is full\n");
DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, distance); DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, (target - (uint32_t) &(freeSlot->trampolin[0])));
return false; return false;
} }
if (target - (uint32_t) &(freeSlot->trampolin[0]) > 0x1FFFFFC) { if (target - (uint32_t) &(freeSlot->trampolin[0]) > 0x1FFFFFC) {
DEBUG_FUNCTION_LINE("**Cannot link 24-bit jump (too far to tramp buffer)."); DEBUG_FUNCTION_LINE("**Cannot link 24-bit jump (too far to tramp buffer).");
DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, distance); DEBUG_FUNCTION_LINE("***value %08X - target %08X = distance %08X\n", value, target, (target - (uint32_t) &(freeSlot->trampolin[0])));
return false; return false;
} }
@ -218,12 +218,11 @@ bool ElfUtils::elfLinkOne(char type, size_t offset, int32_t addend, uint32_t des
freeSlot->status = RELOC_TRAMP_FIXED; freeSlot->status = RELOC_TRAMP_FIXED;
} else { } else {
// Relocations for the imports may be overridden // Relocations for the imports may be overridden
freeSlot->status = RELOC_TRAMP_IMPORT_IN_PROGRESS; freeSlot->status = RELOC_TRAMP_IMPORT_DONE;
} }
auto symbolValue = (uint32_t) &(freeSlot->trampolin[0]); auto symbolValue = (uint32_t) &(freeSlot->trampolin[0]);
value = symbolValue + addend; value = symbolValue + addend;
distance = static_cast<int32_t>(value) - static_cast<int32_t>(target); distance = static_cast<int32_t>(value) - static_cast<int32_t>(target);
DEBUG_FUNCTION_LINE("Created tramp\n");
} }
} }