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https://github.com/fail0verflow/mini.git
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Use PHDR's p_paddr for loading PPC ELFs.
Use the entry point, from now on this is a realmode vector.
This commit is contained in:
parent
65ef5abb3d
commit
ec03192492
2
elf.h
2
elf.h
@ -10,7 +10,7 @@ typedef struct {
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u16 e_type;
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u16 e_machine;
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u32 e_version;
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void *e_entry;
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u32 e_entry;
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u32 e_phoff;
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u32 e_shoff;
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u32 e_flags;
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36
powerpc.c
36
powerpc.c
@ -26,32 +26,28 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#include "start.h"
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#include "gecko.h"
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const u32 stub_default[0x10] = {
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0x3c600000,
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0x60633400,
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0x7c7a03a6,
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0x38600000,
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0x7c7b03a6,
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0x4c000064,
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0,
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};
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void powerpc_upload_stub(const u32 *stub, u32 len)
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void powerpc_upload_stub(u32 entry)
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{
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u32 i;
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set32(HW_EXICTRL, EXICTRL_ENABLE_EXI);
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if(stub == NULL || len == 0)
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{
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stub = stub_default;
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len = sizeof(stub_default) / sizeof(u32);
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}
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// lis r3, entry@h
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write32(EXI_BOOT_BASE + 4 * 0, 0x3c600000 | entry >> 16);
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// ori r3, r3, entry@l
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write32(EXI_BOOT_BASE + 4 * 1, 0x60630000 | (entry & 0xffff));
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// mtsrr0 r3
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write32(EXI_BOOT_BASE + 4 * 2, 0x7c7a03a6);
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// li r3, 0
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write32(EXI_BOOT_BASE + 4 * 3, 0x38600000);
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// mtsrr1 r3
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write32(EXI_BOOT_BASE + 4 * 4, 0x7c7b03a6);
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// rfi
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write32(EXI_BOOT_BASE + 4 * 5, 0x4c000064);
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for (i = 6; i < 0x10; ++i)
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write32(EXI_BOOT_BASE + 4 * i, 0);
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for(i = 0; i < len; i++)
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write32(EXI_BOOT_BASE + 4*i, stub[i]);
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set32(HW_DIFLAGS, DIFLAGS_BOOT_CODE);
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gecko_printf("disabling EXI now...\n");
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@ -2,7 +2,7 @@
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#define __POWERPC_H__ 1
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void ppc_boot_code();
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void powerpc_upload_stub(const u32 *stub, u32 len);
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void powerpc_upload_stub(u32 entry);
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void powerpc_hang();
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void powerpc_reset();
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@ -67,7 +67,6 @@ int powerpc_load_file(const char *path)
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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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@ -85,7 +84,7 @@ int powerpc_load_file(const char *path)
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dc_flushall();
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gecko_printf("ELF load done, booting PPC...\n");
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powerpc_upload_stub(NULL,0);
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powerpc_upload_stub(elfhdr.e_entry);
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powerpc_reset();
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gecko_printf("PPC booted!\n");
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