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Follow ARM's documentation on hw watchpoints to the letter

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TuxSH 2017-07-20 00:56:08 +02:00
parent 7e7ab124a3
commit 3907c46980
10 changed files with 222 additions and 32 deletions
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1
k11_extension/include/globals.h
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@ -56,6 +56,7 @@ extern void (*KScheduler__AttemptSwitchingThreadContext)(KScheduler *this);
extern Result (*ControlMemory)(u32 *addrOut, u32 addr0, u32 addr1, u32 size, MemOp op, MemPerm perm, bool isLoader);
extern void (*SleepThread)(s64 ns);
extern Result (*CloseHandle)(Handle handle);
extern Result (*GetHandleInfo)(s64 *out, Handle handle, u32 type);
extern Result (*GetSystemInfo)(s64 *out, s32 type, s32 param);
extern Result (*GetProcessInfo)(s64 *out, Handle processHandle, u32 type);
extern Result (*GetThreadInfo)(s64 *out, Handle threadHandle, u32 type);

26
k11_extension/include/kernel.h
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@ -1137,21 +1137,29 @@ typedef struct FcramLayout
extern bool isN3DS;
extern void *officialSVCs[0x7E];
#define KPROCESS_OFFSETOF(field) (isN3DS ? offsetof(KProcessN3DS, field) :\
((kernelVersion >= SYSTEM_VERSION(2, 44, 6)) ? offsetof(KProcessO3DS8x, field) :\
offsetof(KProcessO3DSPre8x, field)))
#define KPROCESSRELATED_OFFSETOFF(classname, field) (isN3DS ? offsetof(classname##N3DS, field) :\
((kernelVersion >= SYSTEM_VERSION(2, 44, 6)) ? offsetof(classname##O3DS8x, field) :\
offsetof(classname##O3DSPre8x, field)))
#define KPROCESS_GET_PTR(obj, field) (isN3DS ? &(obj)->N3DS.field :\
#define KPROCESSRELATED_GET_PTR(obj, field) (isN3DS ? &(obj)->N3DS.field :\
((kernelVersion >= SYSTEM_VERSION(2, 44, 6)) ? &(obj)->O3DS8x.field :\
&(obj)->O3DSPre8x.field ))
&(obj)->O3DSPre8x.field))
#define KPROCESS_GET_PTR_TYPE(type, obj, field) (isN3DS ? (type *)(&(obj)->N3DS.field) :\
#define KPROCESSRELATED_GET_PTR_TYPE(type, obj, field) (isN3DS ? (type *)(&(obj)->N3DS.field) :\
((kernelVersion >= SYSTEM_VERSION(2, 44, 6)) ? (type *)(&(obj)->O3DS8x.field) :\
(type *)(&(obj)->O3DSPre8x.field) ))
(type *)(&(obj)->O3DSPre8x.field)))
#define KPROCESS_GET_RVALUE(obj, field) *(KPROCESS_GET_PTR(obj, field))
#define KPROCESS_OFFSETOF(field) KPROCESSRELATED_OFFSETOFF(KProcess, field)
#define KPROCESS_GET_PTR(obj, field) KPROCESSRELATED_GET_PTR(obj, field)
#define KPROCESS_GET_PTR_TYPE(type, obj, field) KPROCESSRELATED_GET_PTR_TYPE(type, obj, field)
#define KPROCESS_GET_RVALUE(obj, field) *(KPROCESS_GET_PTR(obj, field))
#define KPROCESS_GET_RVALUE_TYPE(type, obj, field) *(KPROCESS_GET_PTR_TYPE(type, obj, field))
#define KPROCESS_GET_RVALUE_TYPE(type, obj, field) *(KPROCESS_GET_PTR(type, obj, field))
#define KPROCESSHWINFO_OFFSETOF(field) KPROCESSRELATED_OFFSETOFF(KProcessHwInfo, field)
#define KPROCESSHWINFO_GET_PTR(obj, field) KPROCESSRELATED_GET_PTR(obj, field)
#define KPROCESSHWINFO_GET_PTR_TYPE(type, obj, field) KPROCESSRELATED_GET_PTR_TYPE(type, obj, field)
#define KPROCESSHWINFO_GET_RVALUE(obj, field) *(KPROCESSHWINFO_GET_PTR(obj, field))
#define KPROCESSHWINFO_GET_RVALUE_TYPE(type, obj, field) *(KPROCESSHWINFO_GET_PTR_TYPE(type, obj, field))
static inline u32 idOfProcess(KProcess *process)
{

34
k11_extension/include/svc/GetHandleInfo.h Normal file
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@ -0,0 +1,34 @@
/*
* This file is part of Luma3DS
* Copyright (C) 2016-2017 Aurora Wright, TuxSH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional Terms 7.b and 7.c of GPLv3 apply to this file:
* * Requiring preservation of specified reasonable legal notices or
* author attributions in that material or in the Appropriate Legal
* Notices displayed by works containing it.
* * Prohibiting misrepresentation of the origin of that material,
* or requiring that modified versions of such material be marked in
* reasonable ways as different from the original version.
*/
#pragma once
#include "utils.h"
#include "kernel.h"
#include "svc.h"
Result GetHandleInfoHookWrapper(u32 dummy, Handle handle, u32 type);
Result GetHandleInfoHook(s64 *out, Handle handle, u32 type);

1
k11_extension/source/globals.c
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@ -52,6 +52,7 @@ void (*KScheduler__AttemptSwitchingThreadContext)(KScheduler *this);
Result (*ControlMemory)(u32 *addrOut, u32 addr0, u32 addr1, u32 size, MemOp op, MemPerm perm, bool isLoader);
void (*SleepThread)(s64 ns);
Result (*CloseHandle)(Handle handle);
Result (*GetHandleInfo)(s64 *out, Handle handle, u32 type);
Result (*GetSystemInfo)(s64 *out, s32 type, s32 param);
Result (*GetProcessInfo)(s64 *out, Handle processHandle, u32 type);
Result (*GetThreadInfo)(s64 *out, Handle threadHandle, u32 type);

1
k11_extension/source/main.c
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@ -208,6 +208,7 @@ static void findUsefulSymbols(void)
decodeARMBranch((u32 *)officialSVCs[0x01] + 5);
SleepThread = (void (*)(s64))officialSVCs[0x0A];
CloseHandle = (Result (*)(Handle))officialSVCs[0x23];
GetHandleInfo = (Result (*)(s64 *, Handle, u32))decodeARMBranch((u32 *)officialSVCs[0x29] + 3);
GetSystemInfo = (Result (*)(s64 *, s32, s32))decodeARMBranch((u32 *)officialSVCs[0x2A] + 3);
GetProcessInfo = (Result (*)(s64 *, Handle, u32))decodeARMBranch((u32 *)officialSVCs[0x2B] + 3);
GetThreadInfo = (Result (*)(s64 *, Handle, u32))decodeARMBranch((u32 *)officialSVCs[0x2C] + 3);

5
k11_extension/source/svc.c
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@ -28,9 +28,10 @@
#include "synchronization.h"
#include "svc.h"
#include "svc/ControlMemory.h"
#include "svc/GetHandleInfo.h"
#include "svc/GetSystemInfo.h"
#include "svc/GetProcessInfo.h"
#include "svc/GetThreadInfo.h"
#include "svc/GetSystemInfo.h"
#include "svc/GetCFWInfo.h"
#include "svc/ConnectToPort.h"
#include "svc/SendSyncRequest.h"
@ -103,6 +104,8 @@ void *svcHook(u8 *pageEnd)
doingVeryShittyPmResLimitWorkaround = true;
}
return officialSVCs[0x17];
case 0x29:
return GetHandleInfoHookWrapper;
case 0x2A:
return GetSystemInfoHookWrapper;
case 0x2B:

62
k11_extension/source/svc/GetHandleInfo.c Normal file
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@ -0,0 +1,62 @@
/*
* This file is part of Luma3DS
* Copyright (C) 2016-2017 Aurora Wright, TuxSH
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Additional Terms 7.b and 7.c of GPLv3 apply to this file:
* * Requiring preservation of specified reasonable legal notices or
* author attributions in that material or in the Appropriate Legal
* Notices displayed by works containing it.
* * Prohibiting misrepresentation of the origin of that material,
* or requiring that modified versions of such material be marked in
* reasonable ways as different from the original version.
*/
#include "svc/GetThreadInfo.h"
#include "memory.h"
Result GetHandleInfoHook(s64 *out, Handle handle, u32 type)
{
if(type == 0x10000) // KDebug and KProcess: get context ID
{
KProcessHwInfo *hwInfo;
KProcessHandleTable *handleTable = handleTableOfProcess(currentCoreContext->objectContext.currentProcess);
KAutoObject *obj;
if(handle == CUR_PROCESS_HANDLE)
{
obj = (KAutoObject *)(currentCoreContext->objectContext.currentProcess);
KAutoObject__AddReference(obj);
}
else
obj = KProcessHandleTable__ToKAutoObject(handleTable, handle);
if(obj == NULL)
return 0xD8E007F7;
if(strcmp(classNameOfAutoObject(obj), "KDebug") == 0)
hwInfo = hwInfoOfProcess(((KDebug *)obj)->owner);
else if(strcmp(classNameOfAutoObject(obj), "KProcess") == 0)
hwInfo = hwInfoOfProcess((KProcess *)obj);
else
hwInfo = NULL;
*out = hwInfo != NULL ? KPROCESSHWINFO_GET_RVALUE(hwInfo, contextId) : -1;
obj->vtable->DecrementReferenceCount(obj);
return 0;
}
else
return GetHandleInfo(out, handle, type);
}

10
k11_extension/source/svc/GetProcessInfo.c
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@ -73,12 +73,12 @@ Result GetProcessInfoHook(s64 *out, Handle processHandle, u32 type)
*out = (s64)(u64)(u32)codeSetOfProcess(process)->dataSection.section.loadAddress;
break;
case 0x10008:
*out = (isN3DS ? hwInfoOfProcess(process)->N3DS.translationTableBase :
(kernelVersion >= SYSTEM_VERSION(2, 44, 6)
? hwInfoOfProcess(process)->O3DS8x.translationTableBase
: hwInfoOfProcess(process)->O3DSPre8x.translationTableBase)
) & ~((1 << (14 - TTBCR)) - 1);
{
KProcessHwInfo *hwInfo = hwInfoOfProcess(process);
u32 ttb = KPROCESSHWINFO_GET_RVALUE(hwInfo, translationTableBase);
*out = ttb & ~((1 << (14 - TTBCR)) - 1);
break;
}
default:
res = 0xD8E007ED; // invalid enum value
break;

1
k11_extension/source/svc/wrappers.s
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@ -37,6 +37,7 @@
pop {r1, r2, r12, pc}
.endm
GEN_GETINFO_WRAPPER Handle
GEN_GETINFO_WRAPPER System
GEN_GETINFO_WRAPPER Process
GEN_GETINFO_WRAPPER Thread

113
sysmodules/rosalina/source/gdb/watchpoints.c
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@ -25,6 +25,8 @@
*/
#include "gdb/watchpoints.h"
#include "csvc.h"
#define _REENT_ONLY
#include <errno.h>
@ -53,6 +55,92 @@ typedef struct WatchpointManager
static WatchpointManager manager;
static void K_EnableMonitorModeDebugging(void)
{
__asm__ __volatile__("cpsid aif");
u32 DSCR;
__asm__ __volatile__("mrc p15, 0, %[val], c0, c1, 0" : [val] "=r" (DSCR));
DSCR |= 0x8000;
__asm__ __volatile__("mcr p14, 0, %[val], c0, c1, 0" :: [val] "r" (DSCR));
}
static void K_DisableWatchpoint(u32 id)
{
u32 control;
__asm__ __volatile__("cpsid aif");
if(id == 0)
{
// WCR0
__asm__ __volatile__("mrc p14, 0, %[val], c0, c0, 7" : [val] "=r" (control));
control &= ~1;
__asm__ __volatile__("mcr p14, 0, %[val], c0, c0, 7" :: [val] "r" (control));
// BCR4
__asm__ __volatile__("mrc p14, 0, %[val], c0, c4, 5" : [val] "=r" (control));
control &= ~1;
__asm__ __volatile__("mcr p14, 0, %[val], c0, c4, 5" :: [val] "r" (control));
}
else if(id == 1)
{
// WCR1
__asm__ __volatile__("mrc p14, 0, %[val], c0, c1, 7" : [val] "=r" (control));
control &= ~1;
__asm__ __volatile__("mcr p14, 0, %[val], c0, c1, 7" :: [val] "r" (control));
// BCR5
__asm__ __volatile__("mrc p14, 0, %[val], c0, c5, 5" : [val] "=r" (control));
control &= ~1;
__asm__ __volatile__("mcr p14, 0, %[val], c0, c5, 5" :: [val] "r" (control));
}
}
static void K_SetWatchpoint0WithContextId(u32 DVA, u32 WCR, u32 contextId)
{
// http://infocenter.arm.com/help/topic/com.arm.doc.ddi0360f/CEGCFFDF.html
u32 BCR =
(1 << 21) | /* compare with context ID */
(1 << 20) | /* linked (with a WRP in our case) */
(0xf << 5) | /* byte address select, +0 to +3 as mandated when linking with a WRP */
(3 << 1) | /* either privileged modes or user mode, as mandated when linking with a WRP */
(1 << 0) ; /* enabled */
__asm__ __volatile__("cpsid aif");
K_DisableWatchpoint(0);
__asm__ __volatile__("mcr p14, 0, %[val], c0, c0, 6" :: [val] "r" (DVA));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c4, 4" :: [val] "r" (contextId));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c0, 7" :: [val] "r" (WCR));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c4, 5" :: [val] "r" (BCR));
__asm__ __volatile__("mcr p15, 0, %[val], c7, c10, 5" :: [val] "r" (0) : "memory"); // DMB
}
static void K_SetWatchpoint1WithContextId(u32 DVA, u32 WCR, u32 contextId)
{
// http://infocenter.arm.com/help/topic/com.arm.doc.ddi0360f/CEGCFFDF.html
u32 BCR =
(1 << 21) | /* compare with context ID */
(1 << 20) | /* linked (with a WRP in our case) */
(0xf << 5) | /* byte address select, +0 to +3 as mandated when linking with a WRP */
(3 << 1) | /* either privileged modes or user mode, as mandated when linking with a WRP */
(1 << 0) ; /* enabled */
__asm__ __volatile__("cpsid aif");
K_DisableWatchpoint(1);
__asm__ __volatile__("mcr p14, 0, %[val], c0, c1, 6" :: [val] "r" (DVA));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c5, 4" :: [val] "r" (contextId));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c1, 7" :: [val] "r" (WCR));
__asm__ __volatile__("mcr p14, 0, %[val], c0, c5, 5" :: [val] "r" (BCR));
__asm__ __volatile__("mcr p15, 0, %[val], c7, c10, 5" :: [val] "r" (0) : "memory"); // DMB
}
void GDB_ResetWatchpoints(void)
{
static bool lockInitialized = false;
@ -63,11 +151,9 @@ void GDB_ResetWatchpoints(void)
}
RecursiveLock_Lock(&watchpointManagerLock);
svcSetHardwareBreakPoint(4, 0, 0);
svcSetHardwareBreakPoint(0x100, 0, 0);
svcSetHardwareBreakPoint(5, 0, 0);
svcSetHardwareBreakPoint(0x101, 0, 0);
svcCustomBackdoor(K_EnableMonitorModeDebugging);
svcCustomBackdoor(K_DisableWatchpoint, 0);
svcCustomBackdoor(K_DisableWatchpoint, 1);
memset(&manager, 0, sizeof(WatchpointManager));
@ -93,26 +179,20 @@ int GDB_AddWatchpoint(GDBContext *ctx, u32 address, u32 size, WatchpointKind kin
u32 id = manager.watchpoints[0].kind == WATCHPOINT_DISABLED ? 0 : 1;
u32 selectMask = ((1 << size) - 1) << offset;
u32 BCR = (1 << 21) | /* compare with context ID */
(1 << 20) | /* linked (with a WRP in our case) */
(0xf << 5) | /* byte address select, +0 to +3 as mandated when linking with a WRP */
(3 << 1) | /* either privileged modes or user mode, as mandated when linking with a WRP */
(1 << 0) ; /* enabled */
u32 WCR = (1 << 20) | /* linked */
((4 + id) << 16) | /* ID of the linked BRP */
(selectMask << 5) | /* byte address select */
((u32)kind << 3) | /* kind */
(2 << 1) | /* user mode only */
(1 << 0) ; /* enabled */
s64 out;
Result r = svcSetHardwareBreakPoint(0x100 | id, WCR, address & ~3);
if(R_SUCCEEDED(r))
r = svcSetHardwareBreakPoint(4 + id, BCR, (u32)ctx->debug);
Result r = svcGetHandleInfo(&out, ctx->debug, 0x10000); // context ID
if(R_SUCCEEDED(r))
{
svcCustomBackdoor(id == 0 ? K_SetWatchpoint0WithContextId : K_SetWatchpoint1WithContextId, address, WCR, (u32)out);
Watchpoint *watchpoint = &manager.watchpoints[id];
manager.total++;
watchpoint->address = address;
@ -144,8 +224,7 @@ int GDB_RemoveWatchpoint(GDBContext *ctx, u32 address, WatchpointKind kind)
}
else
{
svcSetHardwareBreakPoint(4 + id, 0, 0);
svcSetHardwareBreakPoint(0x100 | id, 0, 0);
svcCustomBackdoor(K_DisableWatchpoint, id);
memset(&manager.watchpoints[id], 0, sizeof(Watchpoint));
manager.total--;