YJN/selfpatch-slr
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Identified selfpatch randomizer issues

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York Jasper Niebuhr 2025-10-27 23:39:43 +01:00
parent 527db5ce1f
commit b5cc83537d
1 changed files with 25 additions and 1 deletions
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26
selfpatch/src/targets.c
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@ -2,6 +2,7 @@
#include "spslr_program.h" #include "spslr_program.h"
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h>
#include <time.h> #include <time.h>
static void seed_rand_time() { static void seed_rand_time() {
@ -160,6 +161,13 @@ static uint32_t target_get_shuffle_options(const struct Target* target, uint32_t
const struct ShuffleRegion* origin, uint32_t alignment) { const struct ShuffleRegion* origin, uint32_t alignment) {
uint32_t count = 0; uint32_t count = 0;
/*
TODO
Self overlap...
1. Can skip swap check for origin field
2. Origin field can however reduce one side of the origin region if it still overlaps
*/
uint32_t current_field = 0; uint32_t current_field = 0;
for (uint32_t offset = 0; offset < target->size; offset += alignment) { for (uint32_t offset = 0; offset < target->size; offset += alignment) {
// Placing the origin region here or further would exceed struct boundaries // Placing the origin region here or further would exceed struct boundaries
@ -203,8 +211,17 @@ static uint32_t target_get_shuffle_options(const struct Target* target, uint32_t
return count; return count;
} }
static void print_indices(const char* txt, const struct Target* target) {
// TODO
printf("%s\n", txt);
for (uint32_t i = 0; i < target->field_count; i++) {
printf(" %u\n", target->fields[i].initial_idx);
}
}
static void target_swap(struct Target* target, uint32_t origin_idx, const struct ShuffleRegion* origin_region, static void target_swap(struct Target* target, uint32_t origin_idx, const struct ShuffleRegion* origin_region,
uint32_t new_offset) { uint32_t new_offset) {
print_indices("Before swap:", target);
int origin_pulled = 0; int origin_pulled = 0;
uint32_t origin_region_ptr = origin_region->begin; uint32_t origin_region_ptr = origin_region->begin;
uint32_t option_fill_end = new_offset + (origin_region->fill_end - origin_region->fill_begin); uint32_t option_fill_end = new_offset + (origin_region->fill_end - origin_region->fill_begin);
@ -243,10 +260,11 @@ static void target_swap(struct Target* target, uint32_t origin_idx, const struct
struct Field tmp = target->fields[it]; struct Field tmp = target->fields[it];
for (uint32_t pull_it = it + 1; pull_it <= origin_idx; pull_it++) for (uint32_t pull_it = it + 1; pull_it <= origin_idx; pull_it++)
target->fields[it - 1] = target->fields[it]; target->fields[pull_it - 1] = target->fields[pull_it];
target->fields[origin_idx] = tmp; target->fields[origin_idx] = tmp;
} }
print_indices("After swap:", target);
} }
static void target_shuffle_one(struct Target* target) { static void target_shuffle_one(struct Target* target) {
@ -308,6 +326,12 @@ int spslr_randomize(uint32_t target) {
ff->offset = f->offset; ff->offset = f->offset;
} }
printf("Randomization of target %u...\n", target);
for (uint32_t i = 0; i < t->field_count; i++) {
const struct FinalField* ff = &t->final_fields[i];
printf(" Field %u: %u -> %u\n", i, ff->initial_offset, ff->offset);
}
return 0; return 0;
} }