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Project_CTR/makerom/code.c
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#include "lib.h"
#include "elf.h"
#include "blz.h"
#include "ncch_build.h"
#include "exheader_read.h"
#include "code.h"
const char *SDK_PLAINREGION_SEGMENT_NAME = ".module_id";
typedef struct code_segment
{
u32 address;
u32 size;
u32 maxPageNum;
u8 *data;
} code_segment;
u32 GetPageSize(ncch_settings *set)
{
if (set->rsfSet->Option.PageSize)
return strtoul(set->rsfSet->Option.PageSize, NULL, 10);
return 0x1000;
}
u32 SizeToPage(u32 memorySize, elf_context *elf)
{
return align(memorySize, elf->pageSize) / elf->pageSize;
}
int ImportPlainRegionFromFile(ncch_settings *set)
{
set->sections.plainRegion.size = align(set->componentFilePtrs.plainregionSize, set->options.blockSize);
set->sections.plainRegion.buffer = malloc(set->sections.plainRegion.size);
if (!set->sections.plainRegion.buffer) { fprintf(stderr, "[ELF ERROR] Not enough memory\n"); return MEM_ERROR; }
ReadFile64(set->sections.plainRegion.buffer, set->componentFilePtrs.plainregionSize, 0, set->componentFilePtrs.plainregion);
return 0;
}
int ImportExeFsCodeBinaryFromFile(ncch_settings *set)
{
u32 size = set->componentFilePtrs.codeSize;
u8 *buffer = malloc(size);
if (!buffer) {
fprintf(stderr, "[ELF ERROR] Not enough memory\n");
return MEM_ERROR;
}
ReadFile64(buffer, size, 0, set->componentFilePtrs.code);
set->exefsSections.code.size = set->componentFilePtrs.codeSize;
set->exefsSections.code.buffer = malloc(set->exefsSections.code.size);
if (!set->exefsSections.code.buffer) { fprintf(stderr, "[ELF ERROR] Not enough memory\n"); return MEM_ERROR; }
ReadFile64(set->exefsSections.code.buffer, set->exefsSections.code.size, 0, set->componentFilePtrs.code);
if (set->options.CompressCode) {
u32 new_len;
set->exefsSections.code.buffer = BLZ_Code(buffer, size, &new_len, BLZ_NORMAL);
set->exefsSections.code.size = new_len;
free(buffer);
}
else {
set->exefsSections.code.size = size;
set->exefsSections.code.buffer = buffer;
}
size = set->componentFilePtrs.exhdrSize;
if (size < sizeof(extended_hdr)) {
fprintf(stderr, "[ELF ERROR] Exheader code info template is too small\n");
return FAILED_TO_IMPORT_FILE;
}
extended_hdr *exhdr = malloc(size);
if (!exhdr) {
fprintf(stderr, "[ELF ERROR] Not enough memory\n");
return MEM_ERROR;
}
ReadFile64(exhdr, size, 0, set->componentFilePtrs.exhdr);
/* Setting code_segment data */
set->codeDetails.textAddress = u8_to_u32(exhdr->codeSetInfo.text.address, LE);
set->codeDetails.textMaxPages = u8_to_u32(exhdr->codeSetInfo.text.numMaxPages, LE);
set->codeDetails.textSize = u8_to_u32(exhdr->codeSetInfo.text.codeSize, LE);
set->codeDetails.roAddress = u8_to_u32(exhdr->codeSetInfo.rodata.address, LE);
set->codeDetails.roMaxPages = u8_to_u32(exhdr->codeSetInfo.rodata.numMaxPages, LE);
set->codeDetails.roSize = u8_to_u32(exhdr->codeSetInfo.rodata.codeSize, LE);
set->codeDetails.rwAddress = u8_to_u32(exhdr->codeSetInfo.data.address, LE);
set->codeDetails.rwMaxPages = u8_to_u32(exhdr->codeSetInfo.data.numMaxPages, LE);
set->codeDetails.rwSize = u8_to_u32(exhdr->codeSetInfo.data.codeSize, LE);
set->codeDetails.bssSize = u8_to_u32(exhdr->codeSetInfo.bssSize, LE);
set->codeDetails.stackSize = u8_to_u32(exhdr->codeSetInfo.stackSize, LE);
free(exhdr);
return 0;
}
int GetBSSFromElf(elf_context *elf, ncch_settings *set)
{
set->codeDetails.bssSize = 0;
for (int i = 0; i < elf->sectionTableEntryCount; i++) {
if (IsBss(&elf->sections[i]))
set->codeDetails.bssSize = elf->sections[i].size;
}
return 0;
}
int ImportPlainRegionFromElf(elf_context *elf, ncch_settings *set) // Doesn't work same as N makerom
{
u64 size = 0;
u64 offset = 0;
for (u16 i = 0; i < elf->activeSegments; i++) {
if (strcmp(elf->segments[i].name, SDK_PLAINREGION_SEGMENT_NAME) == 0) {
size = elf->segments[i].header->sizeInFile;
offset = elf->segments[i].header->offsetInFile;
break;
}
}
if (size > 0) {
/* Creating Output Buffer */
set->sections.plainRegion.size = align(size, set->options.blockSize);
set->sections.plainRegion.buffer = malloc(set->sections.plainRegion.size);
if (!set->sections.plainRegion.buffer) { fprintf(stderr, "[ELF ERROR] Not enough memory\n"); return MEM_ERROR; }
memset(set->sections.plainRegion.buffer, 0, set->sections.plainRegion.size);
/* Copy Plain Region */
memcpy(set->sections.plainRegion.buffer, elf->file + offset, size);
}
return 0;
}
int CreateCodeSegmentFromElf(code_segment *out, elf_context *elf, u64 segment_flags)
{
memset(out, 0, sizeof(code_segment));
u16 seg_num = 0;
elf_segment **seg = calloc(elf->activeSegments, sizeof(elf_segment*));
for (u16 i = 0; i < elf->activeSegments; i++) {
// Skip SDK ELF plain region
if (strcmp(elf->segments[i].name, SDK_PLAINREGION_SEGMENT_NAME) == 0)
continue;
//printf("SegName: %s (flags: %x)\n", elf->segments[i].name, elf->segments[i].header->flags);
if ((elf->segments[i].header->flags & ~PF_CTRSDK) == segment_flags) {
if (seg_num == 0) {
seg[seg_num] = &elf->segments[i];
seg_num++;
}
else if (elf->segments[i].vAddr == (u32)align(seg[seg_num - 1]->vAddr, seg[seg_num - 1]->header->alignment)) {
seg[seg_num] = &elf->segments[i];
seg_num++;
}
}
}
/* Return if there are no applicable segment */
if (seg_num == 0)
return 0;
/* Getting Segment Size/Settings */
u32 vAddr = 0;
u32 memorySize = 0;
for (u16 i = 0; i < seg_num; i++) {
if (i == 0) {
vAddr = seg[i]->vAddr;
}
else { // Add rounded size from previous segment
u32 padding = seg[i]->vAddr - (vAddr + memorySize);
memorySize += padding;
}
memorySize += seg[i]->header->sizeInMemory;
if (IsBss(&seg[i]->sections[seg[i]->sectionNum - 1]))
memorySize -= seg[i]->sections[seg[i]->sectionNum - 1].size;
}
// For Check
#ifdef DEBUG
printf("Address: 0x%x\n", vAddr);
printf("Size: 0x%x\n", memorySize);
#endif
out->address = vAddr;
out->size = memorySize;
out->maxPageNum = SizeToPage(memorySize, elf);
out->data = malloc(memorySize);
/* Writing Segment to Buffer */
for (int i = 0; i < seg_num; i++) {
for (int j = 0; j < seg[i]->sectionNum; j++) {
elf_section_entry *section = &seg[i]->sections[j];
if (!IsBss(section)) {
u8 *pos = (out->data + (section->address - seg[i]->vAddr));
memcpy(pos, section->ptr, section->size);
//size += section->size;
}
}
}
free(seg);
return 0;
}
int CreateExeFsCode(elf_context *elf, ncch_settings *set)
{
/* Getting Code Segments */
code_segment text;
memset(&text, 0, sizeof(code_segment));
code_segment rodata;
memset(&rodata, 0, sizeof(code_segment));
code_segment rwdata;
memset(&rwdata, 0, sizeof(code_segment));
int result = CreateCodeSegmentFromElf(&text, elf, PF_TEXT);
if (result) return result;
result = CreateCodeSegmentFromElf(&rodata, elf, PF_RODATA);
if (result) return result;
result = CreateCodeSegmentFromElf(&rwdata, elf, PF_DATA);
if (result) return result;
/* Checking the existence of essential ELF Segments */
if (!text.size) return NOT_FIND_TEXT_SEGMENT;
if (!rwdata.size) return NOT_FIND_DATA_SEGMENT;
/* Allocating Buffer for ExeFs Code */
u32 size = (text.maxPageNum + rodata.maxPageNum + rwdata.maxPageNum)*elf->pageSize;
u8 *code = calloc(1, size);
/* Writing Code into Buffer */
u8 *textPos = (code + 0);
u8 *rodataPos = (code + text.maxPageNum*elf->pageSize);
u8 *rwdataPos = (code + (text.maxPageNum + rodata.maxPageNum)*elf->pageSize);
if (text.size) memcpy(textPos, text.data, text.size);
if (rodata.size) memcpy(rodataPos, rodata.data, rodata.size);
if (rwdata.size) memcpy(rwdataPos, rwdata.data, rwdata.size);
/* Compressing If needed */
if (set->options.CompressCode) {
u32 new_len;
set->exefsSections.code.buffer = BLZ_Code(code, size, &new_len, BLZ_NORMAL);
set->exefsSections.code.size = new_len;
free(code);
}
else {
set->exefsSections.code.size = size;
set->exefsSections.code.buffer = code;
}
/* Setting code_segment data and freeing original buffers */
set->codeDetails.textAddress = text.address;
set->codeDetails.textMaxPages = text.maxPageNum;
set->codeDetails.textSize = text.size;
if (text.size) free(text.data);
set->codeDetails.roAddress = rodata.address;
set->codeDetails.roMaxPages = rodata.maxPageNum;
set->codeDetails.roSize = rodata.size;
if (rodata.size) free(rodata.data);
set->codeDetails.rwAddress = rwdata.address;
set->codeDetails.rwMaxPages = rwdata.maxPageNum;
set->codeDetails.rwSize = rwdata.size;
if (rwdata.size) free(rwdata.data);
if (set->rsfSet->SystemControlInfo.StackSize)
set->codeDetails.stackSize = strtoul(set->rsfSet->SystemControlInfo.StackSize, NULL, 0);
else {
fprintf(stderr, "[CODE ERROR] RSF Parameter Not Found: \"SystemControlInfo/StackSize\"\n");
return 1;
}
/* Return */
return 0;
}
void PrintElfContext(elf_context *elf)
{
printf("[ELF] Program Table Data\n");
printf(" Offset: 0x%x\n", elf->programTableOffset);
printf(" Size: 0x%x\n", elf->programTableEntrySize);
printf(" Count: 0x%x\n", elf->programTableEntryCount);
printf("[ELF] Section Table Data\n");
printf(" Offset: 0x%x\n", elf->sectionTableOffset);
printf(" Size: 0x%x\n", elf->sectionTableEntrySize);
printf(" Count: 0x%x\n", elf->sectionTableEntryCount);
printf(" Label index: 0x%x\n", elf->sectionHeaderNameEntryIndex);
for (int i = 0; i < elf->activeSegments; i++) {
printf(" Segment [%d][%s]\n", i, elf->segments[i].name);
printf(" > Size : 0x%x\n", elf->segments[i].header->sizeInFile);
printf(" > Address : 0x%x\n", elf->segments[i].vAddr);
printf(" > Flags: 0x%x\n", elf->segments[i].header->flags);
printf(" > Type: 0x%x\n", elf->segments[i].header->type);
printf(" > Sections : %d\n", elf->segments[i].sectionNum);
for (int j = 0; j < elf->segments[i].sectionNum; j++)
printf(" > Section [%d][%s][0x%x][0x%x]\n", j, elf->segments[i].sections[j].name, elf->segments[i].sections[j].flags, elf->segments[i].sections[j].type);
/*
char outpath[100];
memset(&outpath,0,100);
sprintf(outpath,"%s.bin",elf->sections[i].name);
chdir("elfsections");
FILE *tmp = fopen(outpath,"wb");
WriteBuffer(elf->sections[i].ptr,elf->sections[i].size,0,tmp);
fclose(tmp);
chdir("..");
*/
}
}
int BuildExeFsCode(ncch_settings *set)
{
int result = 0;
if (set->options.IsCfa)
return result;
if (set->componentFilePtrs.plainregion) // Import PlainRegion from file
if ((result = ImportPlainRegionFromFile(set))) return result;
if (!set->options.IsBuildingCodeSection) // Import ExeFs Code from file and return
return ImportExeFsCodeBinaryFromFile(set);
/* Import ELF */
u8 *elfFile = malloc(set->componentFilePtrs.elfSize);
if (!elfFile) {
fprintf(stderr, "[CODE ERROR] Not enough memory\n");
return MEM_ERROR;
}
ReadFile64(elfFile, set->componentFilePtrs.elfSize, 0, set->componentFilePtrs.elf);
/* Create ELF Context */
elf_context *elf = calloc(1, sizeof(elf_context));
if (!elf) {
fprintf(stderr, "[CODE ERROR] Not enough memory\n");
free(elfFile);
return MEM_ERROR;
}
if ((result = GetElfContext(elf, elfFile))) goto finish;
/* Setting Page Size */
elf->pageSize = GetPageSize(set);
if (!set->componentFilePtrs.plainregion)
if ((result = ImportPlainRegionFromElf(elf, set))) goto finish;
if (set->options.verbose)
PrintElfContext(elf);
if ((result = CreateExeFsCode(elf, set))) goto finish;
if ((result = GetBSSFromElf(elf, set))) goto finish;
finish:
switch (result) {
case (0) :
break;
case (NOT_ELF_FILE) :
fprintf(stderr, "[CODE ERROR] Not ELF File\n");
break;
case (NOT_CTR_ARM_ELF) :
fprintf(stderr, "[CODE ERROR] Not CTR ARM ELF\n");
break;
case (NON_EXECUTABLE_ELF) :
fprintf(stderr, "[CODE ERROR] Not Executeable ELF\n");
break;
case (NOT_FIND_TEXT_SEGMENT) :
fprintf(stderr, "[CODE ERROR] Failed to retrieve text sections from ELF\n");
break;
case (NOT_FIND_DATA_SEGMENT) :
fprintf(stderr, "[CODE ERROR] Failed to retrieve data sections from ELF\n");
break;
default:
fprintf(stderr, "[CODE ERROR] Failed to process ELF file (%d)\n", result);
}
FreeElfContext(elf);
free(elfFile);
free(elf);
return result;
}
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