NoozAbooz/minecraft-pi-reborn
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Attempt To Fix RPI Bug

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This commit is contained in:
TheBrokenRail 2021-01-30 00:07:13 -05:00
parent 7b89f7604f
commit b5556e91c3
1 changed files with 3 additions and 1 deletions
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4
libreborn/src/libreborn.c
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@ -186,7 +186,8 @@ void _patch(const char *file, int line, void *start, unsigned char patch[]) {
size_t page_size = sysconf(_SC_PAGESIZE);
uintptr_t end = ((uintptr_t) start) + 4;
uintptr_t page_start = ((uintptr_t) start) & -page_size;
mprotect((void *) page_start, end - page_start, PROT_READ | PROT_WRITE);
// Allow Writing To Code Memory
mprotect((void *) page_start, end - page_start, PROT_READ | PROT_WRITE | PROT_EXEC); // PROT_EXEC Is Needed Because Other Code In The Page May Be Being Executed
unsigned char *data = (unsigned char *) start;
@ -196,6 +197,7 @@ void _patch(const char *file, int line, void *start, unsigned char patch[]) {
PATCH_PRINTF(file, line, start, "result");
// Reset Code Memory Permissions
mprotect((void *) page_start, end - page_start, PROT_READ | PROT_EXEC);
// Clear ARM Instruction Cache