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https://github.com/fail0verflow/mini.git
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90 lines
2.0 KiB
C
90 lines
2.0 KiB
C
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#include "types.h"
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#include "powerpc.h"
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#include "hollywood.h"
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#include "utils.h"
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#include "start.h"
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#include "gecko.h"
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#include "ff.h"
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#include "powerpc_elf.h"
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#include "elf.h"
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#include "string.h"
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#define PHDR_MAX 10
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Elf32_Ehdr elfhdr;
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Elf32_Phdr phdrs[PHDR_MAX];
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int powerpc_load_file(const char *path)
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{
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FIL fd;
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u32 read;
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FRESULT fres;
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fres = f_open(&fd, path, FA_READ);
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if(fres != FR_OK)
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return -fres;
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fres = f_read(&fd, &elfhdr, sizeof(elfhdr), &read);
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if(fres != FR_OK)
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return -fres;
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if(read != sizeof(elfhdr))
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return -100;
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if(memcmp("\x7F" "ELF\x01\x02\x01\x00\x00",elfhdr.e_ident,9)) {
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gecko_printf("Invalid ELF header! 0x%02x 0x%02x 0x%02x 0x%02x\n",elfhdr.e_ident[0], elfhdr.e_ident[1], elfhdr.e_ident[2], elfhdr.e_ident[3]);
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return -101;
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}
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if(elfhdr.e_phoff == 0 || elfhdr.e_phnum == 0) {
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gecko_puts("ELF has no program headers!\n");
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return -102;
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}
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if(elfhdr.e_phnum > PHDR_MAX) {
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gecko_printf("ELF has too many (%d) program headers!\n", elfhdr.e_phnum);
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return -102;
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}
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fres = f_lseek(&fd, elfhdr.e_phoff);
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if(fres != FR_OK)
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return -fres;
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fres = f_read(&fd, phdrs, sizeof(phdrs[0])*elfhdr.e_phnum, &read);
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if(fres != FR_OK)
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return -fres;
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if(read != sizeof(phdrs[0])*elfhdr.e_phnum)
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return -103;
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int count = elfhdr.e_phnum;
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Elf32_Phdr *phdr = phdrs;
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powerpc_hang();
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while(count--)
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{
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if(phdr->p_type != PT_LOAD) {
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gecko_printf("Skipping PHDR of type %d\n",phdr->p_type);
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} else {
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void *dst = phdr->p_paddr;
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dst = (void*)((u32)dst & ~0xC0000000);
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gecko_printf("LOAD 0x%x -> %p [0x%x]\n", phdr->p_offset, phdr->p_paddr, phdr->p_filesz);
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fres = f_lseek(&fd, phdr->p_offset);
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if(fres != FR_OK)
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return -fres;
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fres = f_read(&fd, dst, phdr->p_filesz, &read);
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if(fres != FR_OK)
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return -fres;
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if(read != phdr->p_filesz)
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return -104;
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}
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phdr++;
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}
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gecko_puts("ELF load done, booting PPC...\n");
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powerpc_upload_stub(NULL,0);
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powerpc_reset();
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gecko_puts("PPC booted!\n");
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return 0;
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}
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