LowLevel/Luma3DS-3GX
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change kext base address to 0x70000000

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TuxSH 2020-04-28 02:39:57 +01:00
parent 44cd3928fb
commit cd68b66c03
3 changed files with 20 additions and 16 deletions
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18
arm9/source/patches.c
View File

@ -42,6 +42,8 @@
#include "arm9_exception_handlers.h"
#include "large_patches.h"
#define K11EXT_VA 0x70000000
u8 *getProcess9Info(u8 *pos, u32 size, u32 *process9Size, u32 *process9MemAddr)
{
u8 *temp = memsearch(pos, "NCCH", size, 4);
@ -134,7 +136,7 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
static const u8 patternHook3_4[] = {0x00, 0x00, 0xA0, 0xE1, 0x03, 0xF0, 0x20, 0xE3, 0xFD, 0xFF, 0xFF, 0xEA}; //SGI0 setup code, etc.
//Our kernel11 extension is initially loaded in VRAM
u32 kextTotalSize = *(u32 *)0x18000020 - 0x40000000;
u32 kextTotalSize = *(u32 *)0x18000020 - K11EXT_VA;
u32 dstKextPA = (ISN3DS ? 0x2E000000 : 0x26C00000) - kextTotalSize;
u32 *hookVeneers = (u32 *)*freeK11Space;
@ -143,11 +145,11 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
hookVeneers[0] = 0xE51FF004; //ldr pc, [pc, #-8+4]
hookVeneers[1] = 0x18000004;
hookVeneers[2] = 0xE51FF004;
hookVeneers[3] = 0x40000000;
hookVeneers[3] = K11EXT_VA;
hookVeneers[4] = 0xE51FF004;
hookVeneers[5] = 0x40000008;
hookVeneers[5] = K11EXT_VA + 8;
hookVeneers[6] = 0xE51FF004;
hookVeneers[7] = 0x4000000C;
hookVeneers[7] = K11EXT_VA + 0xC;
(*freeK11Space) += 32;
@ -175,14 +177,14 @@ u32 installK11Extension(u8 *pos, u32 size, bool needToInitSd, u32 baseK11VA, u32
off += 4;
*off = MAKE_BRANCH_LINK(baseK11VA + ((u8 *)off - pos), relocBase + 24);
struct KExtParameters *p = (struct KExtParameters *)(*(u32 *)0x18000024 - 0x40000000 + 0x18000000);
struct KExtParameters *p = (struct KExtParameters *)(*(u32 *)0x18000024 - K11EXT_VA + 0x18000000);
p->basePA = dstKextPA;
for(u32 i = 0; i < 4; i++)
{
u32 *handlerPos = getKernel11HandlerVAPos(pos, arm11ExceptionsPage, baseK11VA, 1 + i);
p->originalHandlers[i] = (void *)*handlerPos;
*handlerPos = 0x40000010 + 4 * i;
*handlerPos = K11EXT_VA + 0x10 + 4 * i;
}
struct CfwInfo *info = &p->info;
@ -248,14 +250,14 @@ u32 patchKernel11(u8 *pos, u32 size, u32 baseK11VA, u32 *arm11SvcTable, u32 *arm
//Redirect enableUserExceptionHandlersForCPUExc (= true)
for(off = arm11ExceptionsPage; *off != 0x96007F9; off++);
off[1] = 0x40000028;
off[1] = K11EXT_VA + 0x28;
off = (u32 *)memsearch(pos, patternKThreadDebugReschedule, size, sizeof(patternKThreadDebugReschedule));
if(off == NULL)
return 1;
off[-5] = 0xE51FF004;
off[-4] = 0x4000002C;
off[-4] = K11EXT_VA + 0x2C;
return 0;
}

4
k11_extension/linker.ld
View File

@ -5,7 +5,7 @@ ENTRY(_start)
MEMORY
{
vram : ORIGIN = 0x18000000, LENGTH = 0x18180000 - 0x18000000 /* Up to the kernel builtins. */
main : ORIGIN = 0x40000000, LENGTH = 1M
main : ORIGIN = 0x70000000, LENGTH = 1M
}
PHDRS
@ -15,7 +15,7 @@ PHDRS
SECTIONS
{
PROVIDE(__start__ = 0x40000000);
PROVIDE(__start__ = ORIGIN(main));
. = ABSOLUTE(__start__);
.text :

14
k11_extension/source/main.c
View File

@ -32,6 +32,8 @@
#include "svc/ConnectToPort.h"
#include "svcHandler.h"
#define K11EXT_VA 0x70000000
struct KExtParameters
{
u32 basePA;
@ -41,13 +43,13 @@ struct KExtParameters
CfwInfo cfwInfo;
} kExtParameters = { .basePA = 0x12345678 }; // place this in .data
static ALIGN(1024) u32 L2TableFor0x40000000[256] = {0};
static ALIGN(1024) u32 g_L2Table[256] = {0};
void relocateAndSetupMMU(u32 coreId, u32 *L1Table)
{
struct KExtParameters *p0 = (struct KExtParameters *)((u32)&kExtParameters - 0x40000000 + 0x18000000);
struct KExtParameters *p = (struct KExtParameters *)((u32)&kExtParameters - 0x40000000 + p0->basePA);
u32 *L2Table = (u32 *)((u32)L2TableFor0x40000000 - 0x40000000 + p0->basePA);
struct KExtParameters *p0 = (struct KExtParameters *)((u32)&kExtParameters - K11EXT_VA + 0x18000000);
struct KExtParameters *p = (struct KExtParameters *)((u32)&kExtParameters - K11EXT_VA + p0->basePA);
u32 *L2Table = (u32 *)((u32)g_L2Table - K11EXT_VA + p0->basePA);
if(coreId == 0)
{
@ -56,7 +58,7 @@ void relocateAndSetupMMU(u32 coreId, u32 *L1Table)
memcpy((void *)p0->basePA, (const void *)0x18000000, __bss_start__ - __start__);
memset((u32 *)(p0->basePA + (__bss_start__ - __start__)), 0, __bss_end__ - __bss_start__);
// Map the kernel ext to 0x40000000
// Map the kernel ext at K11EXT_VA
// 4KB extended small pages: [SYS:RW USR:-- X TYP:NORMAL SHARED OUTER NOCACHE, INNER CACHED WB WA]
for(u32 offset = 0; offset < (u32)(__end__ - __start__); offset += 0x1000)
L2Table[offset >> 12] = (p0->basePA + offset) | 0x516;
@ -76,7 +78,7 @@ void relocateAndSetupMMU(u32 coreId, u32 *L1Table)
L1Table[i + (VA >> 20)] = PA | attribs;
}
L1Table[0x40000000 >> 20] = (u32)L2Table | 1;
L1Table[K11EXT_VA >> 20] = (u32)L2Table | 1;
p->L1MMUTableAddrs[coreId] = (u32)L1Table;
}