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thermosphere: wip gdb

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This commit is contained in:
TuxSH 2020-01-22 01:50:03 +00:00
parent e4b2745e7c
commit 63f5255a3d
8 changed files with 134 additions and 500 deletions
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171
thermosphere/src/gdb.c
View file

@ -5,182 +5,61 @@
* SPDX-License-Identifier: (MIT OR GPL-2.0-or-later) * SPDX-License-Identifier: (MIT OR GPL-2.0-or-later)
*/ */
#if 0 #if 1
#include "gdb.h" #include "gdb.h"
#include "gdb/net.h" #include "gdb/net.h"
#include "gdb/server.h" #include "gdb/server.h"
#include "gdb/debug.h" #include "gdb/debug.h"
#include "gdb/watchpoints.h"
#include "gdb/breakpoints.h"
#include "gdb/stop_point.h" #include "gdb/stop_point.h"
#include "breakpoints.h"
#include "software_breakpoints.h"
#include "watchpoints.h"
void GDB_InitializeContext(GDBContext *ctx) void GDB_InitializeContext(GDBContext *ctx)
{ {
memset(ctx, 0, sizeof(GDBContext)); memset(ctx, 0, sizeof(GDBContext));
RecursiveLock_Init(&ctx->lock);
RecursiveLock_Lock(&ctx->lock);
svcCreateEvent(&ctx->continuedEvent, RESET_ONESHOT);
svcCreateEvent(&ctx->processAttachedEvent, RESET_STICKY);
ctx->eventToWaitFor = ctx->processAttachedEvent;
ctx->continueFlags = (DebugFlags)(DBG_SIGNAL_FAULT_EXCEPTION_EVENTS | DBG_INHIBIT_USER_CPU_EXCEPTION_HANDLERS);
RecursiveLock_Unlock(&ctx->lock);
} }
void GDB_FinalizeContext(GDBContext *ctx) void GDB_FinalizeContext(GDBContext *ctx)
{ {
RecursiveLock_Lock(&ctx->lock); (void)ctx;
svcClearEvent(ctx->processAttachedEvent);
svcCloseHandle(ctx->processAttachedEvent);
svcCloseHandle(ctx->continuedEvent);
RecursiveLock_Unlock(&ctx->lock);
} }
Result GDB_AttachToProcess(GDBContext *ctx) void GDB_Attach(GDBContext *ctx)
{ {
Result r; if (!(ctx->flags & GDB_FLAG_ATTACHED_AT_START)) {
// TODO: debug pause
// Two cases: attached during execution, or started attached
// The second case will have, after RunQueuedProcess: attach process, debugger break, attach thread (with creator = 0)
if (!(ctx->flags & GDB_FLAG_ATTACHED_AT_START))
r = svcDebugActiveProcess(&ctx->debug, ctx->pid);
else
{
r = 0;
} }
if(R_SUCCEEDED(r))
{
// Note: ctx->pid will be (re)set while processing 'attach process'
DebugEventInfo *info = &ctx->latestDebugEvent;
ctx->processExited = ctx->processEnded = false;
if (!(ctx->flags & GDB_FLAG_ATTACHED_AT_START))
{
while(R_SUCCEEDED(svcGetProcessDebugEvent(info, ctx->debug)) &&
info->type != DBGEVENT_EXCEPTION &&
info->exception.type != EXCEVENT_ATTACH_BREAK)
{
GDB_PreprocessDebugEvent(ctx, info);
svcContinueDebugEvent(ctx->debug, ctx->continueFlags);
}
}
else
{
// Attach process, debugger break
for(u32 i = 0; i < 2; i++)
{
if (R_FAILED(r = svcGetProcessDebugEvent(info, ctx->debug)))
return r;
GDB_PreprocessDebugEvent(ctx, info);
if (R_FAILED(r = svcContinueDebugEvent(ctx->debug, ctx->continueFlags)))
return r;
}
if(R_FAILED(r = svcWaitSynchronization(ctx->debug, -1LL))) // TODO: move the debug traps enable here?
return r; // TODO: process the event
if (R_FAILED(r = svcGetProcessDebugEvent(info, ctx->debug)))
return r;
// Attach thread
GDB_PreprocessDebugEvent(ctx, info);
}
}
else
return r;
r = svcSignalEvent(ctx->processAttachedEvent); ctx->state = GDB_STATE_ATTACHED;
if (R_SUCCEEDED(r))
ctx->state = GDB_STATE_ATTACHED;
return r;
} }
void GDB_DetachFromProcess(GDBContext *ctx) void GDB_Detach(GDBContext *ctx)
{ {
DebugEventInfo dummy; removeAllWatchpoints();
for(u32 i = 0; i < ctx->nbBreakpoints; i++) removeAllBreakpoints();
{ removeAllSoftwareBreakpoints(true);
if(!ctx->breakpoints[i].persistent)
GDB_DisableBreakpointById(ctx, i);
}
memset(&ctx->breakpoints, 0, sizeof(ctx->breakpoints));
ctx->nbBreakpoints = 0;
for(u32 i = 0; i < ctx->nbWatchpoints; i++) // Reports to gdb are prevented because of "detaching" state?
{
GDB_RemoveWatchpoint(ctx, ctx->watchpoints[i], WATCHPOINT_DISABLED);
ctx->watchpoints[i] = 0;
}
ctx->nbWatchpoints = 0;
svcKernelSetState(0x10002, ctx->pid, false); // TODO: disable debug traps
memset(ctx->svcMask, 0, 32);
memset(ctx->threadListData, 0, sizeof(ctx->threadListData)); if(ctx->flags & GDB_FLAG_TERMINATE) {
ctx->threadListDataPos = 0; // TODO: redefine what it means for thermosphère, if anything.
//svcSignalEvent(server->statusUpdated);
/*
There's a possibility of a race condition with a possible user exception handler, but you shouldn't
use 'kill' on APPLICATION titles in the first place (reboot hanging because the debugger is still running, etc).
*/
ctx->continueFlags = (DebugFlags)0;
while(R_SUCCEEDED(svcGetProcessDebugEvent(&dummy, ctx->debug)));
while(R_SUCCEEDED(svcContinueDebugEvent(ctx->debug, ctx->continueFlags)));
if(ctx->flags & GDB_FLAG_TERMINATE_PROCESS)
{
svcTerminateDebugProcess(ctx->debug);
ctx->processEnded = true; ctx->processEnded = true;
ctx->processExited = false; ctx->processExited = false;
} }
while(R_SUCCEEDED(svcGetProcessDebugEvent(&dummy, ctx->debug)));
while(R_SUCCEEDED(svcContinueDebugEvent(ctx->debug, ctx->continueFlags)));
svcCloseHandle(ctx->debug);
ctx->debug = 0;
memset(&ctx->launchedProgramInfo, 0, sizeof(FS_ProgramInfo));
ctx->launchedProgramLaunchFlags = 0;
ctx->eventToWaitFor = ctx->processAttachedEvent;
ctx->continueFlags = (DebugFlags)(DBG_SIGNAL_FAULT_EXCEPTION_EVENTS | DBG_INHIBIT_USER_CPU_EXCEPTION_HANDLERS);
ctx->pid = 0;
ctx->currentThreadId = 0;
ctx->selectedThreadId = 0;
ctx->selectedThreadIdForContinuing = 0;
ctx->nbThreads = 0;
ctx->totalNbCreatedThreads = 0;
memset(ctx->threadInfos, 0, sizeof(ctx->threadInfos));
ctx->currentHioRequestTargetAddr = 0; ctx->currentHioRequestTargetAddr = 0;
memset(&ctx->currentHioRequest, 0, sizeof(PackedGdbHioRequest)); memset(&ctx->currentHioRequest, 0, sizeof(PackedGdbHioRequest));
} }
Result GDB_CreateProcess(GDBContext *ctx, const FS_ProgramInfo *progInfo, u32 launchFlags)
{
Handle debug = 0;
ctx->debug = 0;
Result r = PMDBG_LaunchTitleDebug(&debug, progInfo, launchFlags);
if(R_FAILED(r))
return r;
ctx->flags |= GDB_FLAG_CREATED | GDB_FLAG_ATTACHED_AT_START;
ctx->debug = debug;
ctx->launchedProgramInfo = *progInfo;
ctx->launchedProgramLaunchFlags = launchFlags;
r = GDB_AttachToProcess(ctx);
return r;
}
GDB_DECLARE_HANDLER(Unsupported) GDB_DECLARE_HANDLER(Unsupported)
{ {
return GDB_ReplyEmpty(ctx); return GDB_ReplyEmpty(ctx);
@ -188,12 +67,8 @@ GDB_DECLARE_HANDLER(Unsupported)
GDB_DECLARE_HANDLER(EnableExtendedMode) GDB_DECLARE_HANDLER(EnableExtendedMode)
{ {
if (ctx->localPort >= GDB_PORT_BASE && ctx->localPort < GDB_PORT_BASE + MAX_DEBUG) // We don't support it for now...
{ return GDB_HandleUnsupported(ctx);
ctx->flags |= GDB_FLAG_EXTENDED_REMOTE;
return GDB_ReplyOk(ctx);
}
else
return GDB_ReplyEmpty(ctx);
} }
#endif #endif

100
thermosphere/src/gdb.h
View file

@ -7,20 +7,10 @@
#pragma once #pragma once
#include <3ds/types.h> #include "utils.h"
#include <3ds/svc.h> #include "spinlock.h"
#include <3ds/synchronization.h>
#include <3ds/result.h>
#include "pmdbgext.h"
#include "sock_util.h"
#include "memory.h"
#include "ifile.h"
#define MAX_DEBUG 3 #define MAX_CTX 3
#define MAX_DEBUG_THREAD 127
#define MAX_BREAKPOINT 256
#define MAX_TIO_OPEN_FILE 32
// 512+24 is the ideal size as IDA will try to read exactly 0x100 bytes at a time. Add 4 to this, for $#<checksum>, see below. // 512+24 is the ideal size as IDA will try to read exactly 0x100 bytes at a time. Add 4 to this, for $#<checksum>, see below.
// IDA seems to want additional bytes as well. // IDA seems to want additional bytes as well.
@ -35,14 +25,6 @@
#define GDB_DECLARE_QUERY_HANDLER(name) GDB_DECLARE_HANDLER(Query##name) #define GDB_DECLARE_QUERY_HANDLER(name) GDB_DECLARE_HANDLER(Query##name)
#define GDB_DECLARE_VERBOSE_HANDLER(name) GDB_DECLARE_HANDLER(Verbose##name) #define GDB_DECLARE_VERBOSE_HANDLER(name) GDB_DECLARE_HANDLER(Verbose##name)
typedef struct Breakpoint
{
u32 address;
u32 savedInstruction;
u8 instructionSize;
bool persistent;
} Breakpoint;
typedef struct PackedGdbHioRequest typedef struct PackedGdbHioRequest
{ {
char magic[4]; // "GDB\x00" char magic[4]; // "GDB\x00"
@ -61,24 +43,17 @@ typedef struct PackedGdbHioRequest
bool ctrlC; bool ctrlC;
} PackedGdbHioRequest; } PackedGdbHioRequest;
typedef struct GdbTioFileInfo enum {
{ GDB_FLAG_SELECTED = BIT(0),
IFile f; GDB_FLAG_USED = BIT(1),
int flags; GDB_FLAG_ALLOCATED_MASK = GDB_FLAG_SELECTED | GDB_FLAG_USED,
} GdbTioFileInfo; GDB_FLAG_EXTENDED_REMOTE = BIT(2), // unused here
GDB_FLAG_NOACK = BIT(3),
enum GDB_FLAG_RESTART_MASK = GDB_FLAG_NOACK | GDB_FLAG_EXTENDED_REMOTE | GDB_FLAG_USED,
{ GDB_FLAG_CONTINUING = BIT(4),
GDB_FLAG_SELECTED = 1, GDB_FLAG_TERMINATE = BIT(5),
GDB_FLAG_USED = 2, GDB_FLAG_ATTACHED_AT_START = BIT(6),
GDB_FLAG_ALLOCATED_MASK = GDB_FLAG_SELECTED | GDB_FLAG_USED, GDB_FLAG_CREATED = BIT(7),
GDB_FLAG_EXTENDED_REMOTE = 4,
GDB_FLAG_NOACK = 8,
GDB_FLAG_PROC_RESTART_MASK = GDB_FLAG_NOACK | GDB_FLAG_EXTENDED_REMOTE | GDB_FLAG_USED,
GDB_FLAG_PROCESS_CONTINUING = 16,
GDB_FLAG_TERMINATE_PROCESS = 32,
GDB_FLAG_ATTACHED_AT_START = 64,
GDB_FLAG_CREATED = 128,
}; };
typedef enum GDBState typedef enum GDBState
@ -99,60 +74,28 @@ struct GDBServer;
typedef struct GDBContext typedef struct GDBContext
{ {
sock_ctx super; TransportInterface *transportIface;
struct GDBServer *parent; struct GDBServer *parent;
RecursiveLock lock; RecursiveSpinlock lock;
u16 localPort;
u32 flags; u32 flags;
GDBState state; GDBState state;
bool noAckSent; bool noAckSent;
u32 pid; u32 currentThreadId;
Handle debug;
// vRun and R (restart) info:
FS_ProgramInfo launchedProgramInfo;
u32 launchedProgramLaunchFlags;
ThreadInfo threadInfos[MAX_DEBUG_THREAD];
u32 nbThreads;
u32 currentThreadId, selectedThreadId, selectedThreadIdForContinuing;
u32 totalNbCreatedThreads;
Handle processAttachedEvent, continuedEvent;
Handle eventToWaitFor;
bool catchThreadEvents; bool catchThreadEvents;
bool processEnded, processExited; bool processEnded, processExited;
DebugEventInfo latestDebugEvent; //DebugEventInfo latestDebugEvent; FIXME
DebugFlags continueFlags;
u32 svcMask[8];
u32 nbBreakpoints; uintptr_t currentHioRequestTargetAddr;
Breakpoint breakpoints[MAX_BREAKPOINT];
u32 nbWatchpoints;
u32 watchpoints[2];
u32 currentHioRequestTargetAddr;
PackedGdbHioRequest currentHioRequest; PackedGdbHioRequest currentHioRequest;
GdbTioFileInfo openTioFileInfos[MAX_TIO_OPEN_FILE];
u32 numOpenTioFiles;
bool enableExternalMemoryAccess;
char *commandData, *commandEnd; char *commandData, *commandEnd;
int latestSentPacketSize; int latestSentPacketSize;
char buffer[GDB_BUF_LEN + 4]; char buffer[GDB_BUF_LEN + 4];
char threadListData[0x800];
u32 threadListDataPos;
char memoryOsInfoXmlData[0x800];
char processesOsInfoXmlData[0x1800];
} GDBContext; } GDBContext;
typedef int (*GDBCommandHandler)(GDBContext *ctx); typedef int (*GDBCommandHandler)(GDBContext *ctx);
@ -160,9 +103,8 @@ typedef int (*GDBCommandHandler)(GDBContext *ctx);
void GDB_InitializeContext(GDBContext *ctx); void GDB_InitializeContext(GDBContext *ctx);
void GDB_FinalizeContext(GDBContext *ctx); void GDB_FinalizeContext(GDBContext *ctx);
Result GDB_AttachToProcess(GDBContext *ctx); void GDB_Attach(GDBContext *ctx);
void GDB_DetachFromProcess(GDBContext *ctx); void GDB_Detach(GDBContext *ctx);
Result GDB_CreateProcess(GDBContext *ctx, const FS_ProgramInfo *progInfo, u32 launchFlags);
GDB_DECLARE_HANDLER(Unsupported); GDB_DECLARE_HANDLER(Unsupported);
GDB_DECLARE_HANDLER(EnableExtendedMode); GDB_DECLARE_HANDLER(EnableExtendedMode);

36
thermosphere/src/gdb/debug.c
View file

@ -23,7 +23,7 @@
static void GDB_DetachImmediatelyExtended(GDBContext *ctx) static void GDB_DetachImmediatelyExtended(GDBContext *ctx)
{ {
// detach immediately // detach immediately
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
ctx->state = GDB_STATE_DETACHING; ctx->state = GDB_STATE_DETACHING;
svcClearEvent(ctx->processAttachedEvent); svcClearEvent(ctx->processAttachedEvent);
@ -31,14 +31,14 @@ static void GDB_DetachImmediatelyExtended(GDBContext *ctx)
svcClearEvent(ctx->parent->statusUpdateReceived); svcClearEvent(ctx->parent->statusUpdateReceived);
svcSignalEvent(ctx->parent->statusUpdated); svcSignalEvent(ctx->parent->statusUpdated);
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
svcWaitSynchronization(ctx->parent->statusUpdateReceived, -1LL); svcWaitSynchronization(ctx->parent->statusUpdateReceived, -1LL);
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
GDB_DetachFromProcess(ctx); GDB_DetachFromProcess(ctx);
ctx->flags &= GDB_FLAG_PROC_RESTART_MASK; ctx->flags &= GDB_FLAG_RESTART_MASK;
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
} }
GDB_DECLARE_VERBOSE_HANDLER(Run) GDB_DECLARE_VERBOSE_HANDLER(Run)
@ -90,18 +90,18 @@ GDB_DECLARE_VERBOSE_HANDLER(Run)
progInfo.mediaType = (FS_MediaType)mediaType; progInfo.mediaType = (FS_MediaType)mediaType;
progInfo.programId = titleId; progInfo.programId = titleId;
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
Result r = GDB_CreateProcess(ctx, &progInfo, launchFlags); Result r = GDB_CreateProcess(ctx, &progInfo, launchFlags);
if (R_FAILED(r)) if (R_FAILED(r))
{ {
if(ctx->debug != 0) if(ctx->debug != 0)
GDB_DetachImmediatelyExtended(ctx); GDB_DetachImmediatelyExtended(ctx);
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return GDB_ReplyErrno(ctx, EPERM); return GDB_ReplyErrno(ctx, EPERM);
} }
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return R_SUCCEEDED(r) ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_ReplyErrno(ctx, EPERM); return R_SUCCEEDED(r) ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_ReplyErrno(ctx, EPERM);
} }
@ -115,15 +115,15 @@ GDB_DECLARE_HANDLER(Restart)
FS_ProgramInfo progInfo = ctx->launchedProgramInfo; FS_ProgramInfo progInfo = ctx->launchedProgramInfo;
u32 launchFlags = ctx->launchedProgramLaunchFlags; u32 launchFlags = ctx->launchedProgramLaunchFlags;
ctx->flags |= GDB_FLAG_TERMINATE_PROCESS; ctx->flags |= GDB_FLAG_TERMINATE;
if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE) if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE)
GDB_DetachImmediatelyExtended(ctx); GDB_DetachImmediatelyExtended(ctx);
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
Result r = GDB_CreateProcess(ctx, &progInfo, launchFlags); Result r = GDB_CreateProcess(ctx, &progInfo, launchFlags);
if (R_FAILED(r) && ctx->debug != 0) if (R_FAILED(r) && ctx->debug != 0)
GDB_DetachImmediatelyExtended(ctx); GDB_DetachImmediatelyExtended(ctx);
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return 0; return 0;
} }
@ -137,12 +137,12 @@ GDB_DECLARE_VERBOSE_HANDLER(Attach)
if(GDB_ParseHexIntegerList(&pid, ctx->commandData, 1, 0) == NULL) if(GDB_ParseHexIntegerList(&pid, ctx->commandData, 1, 0) == NULL)
return GDB_ReplyErrno(ctx, EILSEQ); return GDB_ReplyErrno(ctx, EILSEQ);
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
ctx->pid = pid; ctx->pid = pid;
Result r = GDB_AttachToProcess(ctx); Result r = GDB_AttachToProcess(ctx);
if(R_FAILED(r)) if(R_FAILED(r))
GDB_DetachImmediatelyExtended(ctx); GDB_DetachImmediatelyExtended(ctx);
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return R_SUCCEEDED(r) ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_ReplyErrno(ctx, EPERM); return R_SUCCEEDED(r) ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_ReplyErrno(ctx, EPERM);
} }
@ -163,7 +163,7 @@ GDB_DECLARE_HANDLER(Detach)
GDB_DECLARE_HANDLER(Kill) GDB_DECLARE_HANDLER(Kill)
{ {
ctx->state = GDB_STATE_DETACHING; ctx->state = GDB_STATE_DETACHING;
ctx->flags |= GDB_FLAG_TERMINATE_PROCESS; ctx->flags |= GDB_FLAG_TERMINATE;
if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE) if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE)
GDB_DetachImmediatelyExtended(ctx); GDB_DetachImmediatelyExtended(ctx);
@ -172,11 +172,11 @@ GDB_DECLARE_HANDLER(Kill)
GDB_DECLARE_HANDLER(Break) GDB_DECLARE_HANDLER(Break)
{ {
if(!(ctx->flags & GDB_FLAG_PROCESS_CONTINUING)) if(!(ctx->flags & GDB_FLAG_CONTINUING)) // Is this ever reached?
return GDB_SendPacket(ctx, "S02", 3); return GDB_SendPacket(ctx, "S02", 3);
else else
{ {
ctx->flags &= ~GDB_FLAG_PROCESS_CONTINUING; ctx->flags &= ~GDB_FLAG_CONTINUING;
return 0; return 0;
} }
} }
@ -185,7 +185,7 @@ void GDB_ContinueExecution(GDBContext *ctx)
{ {
ctx->selectedThreadId = ctx->selectedThreadIdForContinuing = 0; ctx->selectedThreadId = ctx->selectedThreadIdForContinuing = 0;
svcContinueDebugEvent(ctx->debug, ctx->continueFlags); svcContinueDebugEvent(ctx->debug, ctx->continueFlags);
ctx->flags |= GDB_FLAG_PROCESS_CONTINUING; ctx->flags |= GDB_FLAG_CONTINUING;
} }
GDB_DECLARE_HANDLER(Continue) GDB_DECLARE_HANDLER(Continue)
@ -654,7 +654,7 @@ int GDB_HandleDebugEvents(GDBContext *ctx)
ctx->latestDebugEvent = info; ctx->latestDebugEvent = info;
ret = GDB_SendStopReply(ctx, &info); ret = GDB_SendStopReply(ctx, &info);
ctx->flags &= ~GDB_FLAG_PROCESS_CONTINUING; ctx->flags &= ~GDB_FLAG_CONTINUING;
return ret; return ret;
} }
} }

2
thermosphere/src/gdb/net.c
View file

@ -335,7 +335,7 @@ int GDB_SendStreamData(GDBContext *ctx, const char *streamData, u32 offset, u32
int GDB_SendDebugString(GDBContext *ctx, const char *fmt, ...) // unsecure int GDB_SendDebugString(GDBContext *ctx, const char *fmt, ...) // unsecure
{ {
/*if(ctx->state == GDB_STATE_DETACHING || !(ctx->flags & GDB_FLAG_PROCESS_CONTINUING)) /*if(ctx->state == GDB_STATE_DETACHING || !(ctx->flags & GDB_FLAG_CONTINUING))
return 0;*/ return 0;*/
char formatted[(GDB_BUF_LEN - 1) / 2 + 1]; char formatted[(GDB_BUF_LEN - 1) / 2 + 1];

279
thermosphere/src/gdb/server.c
View file

@ -17,266 +17,98 @@
#include "gdb/watchpoints.h" #include "gdb/watchpoints.h"
#include "gdb/breakpoints.h" #include "gdb/breakpoints.h"
#include "gdb/stop_point.h" #include "gdb/stop_point.h"
#include "task_runner.h"
Result GDB_InitializeServer(GDBServer *server) void GDB_InitializeServer(GDBServer *server)
{ {
Result ret = server_init(&server->super); for(u32 i = 0; i < sizeof(server->ctxs) / sizeof(GDBContext); i++) {
if(ret != 0)
return ret;
server->super.host = 0;
server->super.accept_cb = (sock_accept_cb)GDB_AcceptClient;
server->super.data_cb = (sock_data_cb) GDB_DoPacket;
server->super.close_cb = (sock_close_cb) GDB_CloseClient;
server->super.alloc = (sock_alloc_func) GDB_GetClient;
server->super.free = (sock_free_func) GDB_ReleaseClient;
server->super.clients_per_server = 1;
server->referenceCount = 0;
svcCreateEvent(&server->statusUpdated, RESET_ONESHOT);
svcCreateEvent(&server->statusUpdateReceived, RESET_STICKY);
for(u32 i = 0; i < sizeof(server->ctxs) / sizeof(GDBContext); i++)
GDB_InitializeContext(server->ctxs + i); GDB_InitializeContext(server->ctxs + i);
}
GDB_ResetWatchpoints();
return 0; return 0;
} }
void GDB_FinalizeServer(GDBServer *server) void GDB_FinalizeServer(GDBServer *server)
{ {
server_finalize(&server->super);
// Kill the "next application" context if needed // Kill the "next application" context if needed
for (u32 i = 0; i < MAX_DEBUG; i++) { for (u32 i = 0; i < MAX_CTX; i++) {
if (server->ctxs[i].debug != 0) if (server->ctxs[i].state != GDB_STATE_DISCONNECTED) {
GDB_CloseClient(&server->ctxs[i]); GDB_CloseClient(&server->ctxs[i]);
}
} }
svcCloseHandle(server->statusUpdated);
svcCloseHandle(server->statusUpdateReceived);
}
void GDB_IncrementServerReferenceCount(GDBServer *server)
{
AtomicPostIncrement(&server->referenceCount);
}
void GDB_DecrementServerReferenceCount(GDBServer *server)
{
if(AtomicDecrement(&server->referenceCount) == 0)
GDB_FinalizeServer(server);
} }
void GDB_RunServer(GDBServer *server) void GDB_RunServer(GDBServer *server)
{ {
server_bind(&server->super, GDB_PORT_BASE); // TODO transport iface
server_bind(&server->super, GDB_PORT_BASE + 1); (void)server;
server_bind(&server->super, GDB_PORT_BASE + 2);
server_bind(&server->super, GDB_PORT_BASE + 3); // next application
server_run(&server->super);
} }
void GDB_LockAllContexts(GDBServer *server) void GDB_LockAllContexts(GDBServer *server)
{ {
for (u32 i = 0; i < MAX_DEBUG; i++) for (u32 i = 0; i < MAX_CTX; i++) {
RecursiveLock_Lock(&server->ctxs[i].lock); recursiveSpinlockLock(&server->ctxs[i].lock);
}
} }
void GDB_UnlockAllContexts(GDBServer *server) void GDB_UnlockAllContexts(GDBServer *server)
{ {
for (u32 i = MAX_DEBUG; i > 0; i--) for (u32 i = MAX_CTX; i > 0; i--) {
RecursiveLock_Unlock(&server->ctxs[i - 1].lock); recursiveSpinlockUnlock(&server->ctxs[i - 1].lock);
}
} }
GDBContext *GDB_SelectAvailableContext(GDBServer *server, u16 minPort, u16 maxPort) GDBContext *GDB_SelectAvailableContext(GDBServer *server)
{ {
GDBContext *ctx; GDBContext *ctx;
u16 port;
GDB_LockAllContexts(server); GDB_LockAllContexts(server);
// Get a context // Get a context
u32 id; size_t id;
for(id = 0; id < MAX_DEBUG && (server->ctxs[id].flags & GDB_FLAG_ALLOCATED_MASK); id++); for (id = 0; id < MAX_CTX && (server->ctxs[id].flags & GDB_FLAG_ALLOCATED_MASK); id++);
if(id < MAX_DEBUG) ctx = id < MAX_CTX ? &server->ctxs[id] : NULL;
ctx = &server->ctxs[id];
else
{
GDB_UnlockAllContexts(server);
return NULL;
}
// Get a port
for (port = minPort; port < maxPort; port++)
{
bool portUsed = false;
for(id = 0; id < MAX_DEBUG; id++)
{
if((server->ctxs[id].flags & GDB_FLAG_ALLOCATED_MASK) && server->ctxs[id].localPort == port)
portUsed = true;
}
if (!portUsed)
break;
}
if (port >= maxPort)
{
ctx->flags = ~GDB_FLAG_SELECTED;
ctx = NULL;
}
else
{
ctx->flags |= GDB_FLAG_SELECTED;
ctx->localPort = port;
ctx->parent = server;
}
GDB_UnlockAllContexts(server);
return ctx;
}
GDBContext *GDB_FindAllocatedContextByPid(GDBServer *server, u32 pid)
{
GDB_LockAllContexts(server);
GDBContext *ctx = NULL;
for(u32 i = 0; i < MAX_DEBUG; i++)
{
if(
((server->ctxs[i].flags & GDB_FLAG_SELECTED) ||
(server->ctxs[i].state >= GDB_STATE_ATTACHED && server->ctxs[i].state < GDB_STATE_DETACHING))
&& server->ctxs[i].pid == pid
)
ctx = &server->ctxs[i];
}
GDB_UnlockAllContexts(server); GDB_UnlockAllContexts(server);
return ctx; return ctx;
} }
int GDB_AcceptClient(GDBContext *ctx) int GDB_AcceptClient(GDBContext *ctx)
{ {
Result r = 0; recursiveSpinlockLock(&ctx->lock);
RecursiveLock_Lock(&ctx->lock);
ctx->state = GDB_STATE_CONNECTED; ctx->state = GDB_STATE_CONNECTED;
ctx->latestSentPacketSize = 0; ctx->latestSentPacketSize = 0;
if (ctx->flags & GDB_FLAG_SELECTED) /*if (ctx->flags & GDB_FLAG_SELECTED)
r = GDB_AttachToProcess(ctx); r = GDB_AttachToProcess(ctx);
*/
recursiveSpinlockUnlock(&ctx->lock);
RecursiveLock_Unlock(&ctx->lock); return 0;
return R_SUCCEEDED(r) ? 0 : -1;
} }
int GDB_CloseClient(GDBContext *ctx) int GDB_CloseClient(GDBContext *ctx)
{ {
RecursiveLock_Lock(&ctx->lock); // currently unused
svcClearEvent(ctx->processAttachedEvent); recursiveSpinlockLock(&ctx->lock);
ctx->eventToWaitFor = ctx->processAttachedEvent;
svcClearEvent(ctx->parent->statusUpdateReceived);
svcSignalEvent(ctx->parent->statusUpdated); // note: monitor will be waiting for lock
RecursiveLock_Unlock(&ctx->lock);
if(ctx->parent->referenceCount >= 2) if (ctx->state >= GDB_STATE_ATTACHED) {
svcWaitSynchronization(ctx->parent->statusUpdateReceived, -1LL);
RecursiveLock_Lock(&ctx->lock);
if (ctx->state >= GDB_STATE_ATTACHED || ctx->debug != 0)
GDB_DetachFromProcess(ctx); GDB_DetachFromProcess(ctx);
}
ctx->localPort = 0;
ctx->enableExternalMemoryAccess = false;
ctx->flags = 0; ctx->flags = 0;
ctx->state = GDB_STATE_DISCONNECTED; ctx->state = GDB_STATE_DISCONNECTED;
ctx->catchThreadEvents = false; ctx->catchThreadEvents = false;
memset(&ctx->latestDebugEvent, 0, sizeof(DebugEventInfo)); // memset(&ctx->latestDebugEvent, 0, sizeof(DebugEventInfo)); TODO
memset(ctx->memoryOsInfoXmlData, 0, sizeof(ctx->memoryOsInfoXmlData));
memset(ctx->processesOsInfoXmlData, 0, sizeof(ctx->processesOsInfoXmlData));
for (u32 i = 0; i < MAX_TIO_OPEN_FILE; i++) recursiveSpinlockUnlock(&ctx->lock);
IFile_Close(&ctx->openTioFileInfos[i].f);
memset(ctx->openTioFileInfos, 0, sizeof(ctx->openTioFileInfos));
ctx->numOpenTioFiles = 0;
RecursiveLock_Unlock(&ctx->lock);
return 0; return 0;
} }
GDBContext *GDB_GetClient(GDBServer *server, u16 port)
{
GDB_LockAllContexts(server);
GDBContext *ctx = NULL;
for (u32 i = 0; i < MAX_DEBUG; i++)
{
if (server->ctxs[i].localPort == port)
{
ctx = &server->ctxs[i];
break;
}
}
if (ctx != NULL)
{
// Context already tied to a port/selected
if (ctx->flags & GDB_FLAG_USED)
{
GDB_UnlockAllContexts(server);
return NULL;
}
ctx->flags |= GDB_FLAG_USED;
ctx->state = GDB_STATE_CONNECTED;
ctx->parent = server;
}
else if (port >= GDB_PORT_BASE && port < GDB_PORT_BASE + MAX_DEBUG)
{
// Grab a free context
u32 id;
for(id = 0; id < MAX_DEBUG && (server->ctxs[id].flags & GDB_FLAG_ALLOCATED_MASK); id++);
if(id < MAX_DEBUG)
ctx = &server->ctxs[id];
else
{
GDB_UnlockAllContexts(server);
return NULL;
}
ctx->localPort = port;
ctx->flags |= GDB_FLAG_USED;
ctx->state = GDB_STATE_CONNECTED;
ctx->parent = server;
}
GDB_UnlockAllContexts(server);
if (port == GDB_PORT_BASE + MAX_DEBUG && ctx != NULL)
{
// this is not sufficient/foolproof and is buggy: TaskRunner_WaitReady(); // Finish grabbing new process debug, if anything...
bool ok = false;
do
{
svcSleepThread(5 * 1000 * 1000LL);
RecursiveLock_Lock(&ctx->lock);
ok = ctx->debug != 0;
RecursiveLock_Unlock(&ctx->lock);
}
while (!ok);
}
return ctx;
}
void GDB_ReleaseClient(GDBServer *server, GDBContext *ctx) void GDB_ReleaseClient(GDBServer *server, GDBContext *ctx)
{ {
// same thing
(void)server; (void)server;
(void)ctx; (void)ctx;
} }
@ -315,8 +147,8 @@ static inline GDBCommandHandler GDB_GetCommandHandler(char command)
{ {
static const u32 nbHandlers = sizeof(gdbCommandHandlers) / sizeof(gdbCommandHandlers[0]); static const u32 nbHandlers = sizeof(gdbCommandHandlers) / sizeof(gdbCommandHandlers[0]);
u32 i; size_t i;
for(i = 0; i < nbHandlers && gdbCommandHandlers[i].command != command; i++); for (i = 0; i < nbHandlers && gdbCommandHandlers[i].command != command; i++);
return i < nbHandlers ? gdbCommandHandlers[i].handler : GDB_HANDLER(Unsupported); return i < nbHandlers ? gdbCommandHandlers[i].handler : GDB_HANDLER(Unsupported);
} }
@ -325,54 +157,47 @@ int GDB_DoPacket(GDBContext *ctx)
{ {
int ret; int ret;
RecursiveLock_Lock(&ctx->lock); recursiveSpinlockLock(&ctx->lock);
u32 oldFlags = ctx->flags; u32 oldFlags = ctx->flags;
if(ctx->state == GDB_STATE_DISCONNECTED) if(ctx->state == GDB_STATE_DISCONNECTED) {
return -1; return -1;
}
int r = GDB_ReceivePacket(ctx); int r = GDB_ReceivePacket(ctx);
if(r == 0) if (r == 0) {
ret = 0; ret = 0;
else if(r == -1) } else if (r == -1) {
ret = -1; ret = -1;
else if(ctx->buffer[0] == '\x03') } else if (ctx->buffer[0] == '\x03') {
{
GDB_HandleBreak(ctx); GDB_HandleBreak(ctx);
ret = 0; ret = 0;
} } else if (ctx->buffer[0] == '$') {
else if(ctx->buffer[0] == '$')
{
GDBCommandHandler handler = GDB_GetCommandHandler(ctx->buffer[1]); GDBCommandHandler handler = GDB_GetCommandHandler(ctx->buffer[1]);
ctx->commandData = ctx->buffer + 2; ctx->commandData = ctx->buffer + 2;
ret = handler(ctx); ret = handler(ctx);
} } else {
else
ret = 0; ret = 0;
}
if(ctx->state == GDB_STATE_DETACHING) if (ctx->state == GDB_STATE_DETACHING) {
{ if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE) {
if(ctx->flags & GDB_FLAG_EXTENDED_REMOTE)
{
ctx->state = GDB_STATE_CONNECTED; ctx->state = GDB_STATE_CONNECTED;
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return ret; return ret;
} } else {
else recursiveSpinlockUnlock(&ctx->lock);
{
RecursiveLock_Unlock(&ctx->lock);
return -1; return -1;
} }
} }
if((oldFlags & GDB_FLAG_PROCESS_CONTINUING) && !(ctx->flags & GDB_FLAG_PROCESS_CONTINUING)) if ((oldFlags & GDB_FLAG_CONTINUING) && !(ctx->flags & GDB_FLAG_CONTINUING)) {
{ // TODO
if(R_FAILED(svcBreakDebugProcess(ctx->debug))) }
ctx->flags |= GDB_FLAG_PROCESS_CONTINUING; else if (!(oldFlags & GDB_FLAG_CONTINUING) && (ctx->flags & GDB_FLAG_CONTINUING)) {
// TODO
} }
else if(!(oldFlags & GDB_FLAG_PROCESS_CONTINUING) && (ctx->flags & GDB_FLAG_PROCESS_CONTINUING))
svcSignalEvent(ctx->continuedEvent);
RecursiveLock_Unlock(&ctx->lock); recursiveSpinlockUnlock(&ctx->lock);
return ret; return ret;
} }

29
thermosphere/src/gdb/server.h
View file

@ -7,37 +7,28 @@
#pragma once #pragma once
#include "gdb.h" #include "../gdb.h"
#include "../transport_interface.h"
#ifndef GDB_PORT_BASE typedef struct GDBServer {
#define GDB_PORT_BASE 4000 TransportInterface *transportIfaces[MAX_CTX];
#endif GDBContext ctxs[MAX_CTX];
typedef struct GDBServer
{
sock_server super;
s32 referenceCount;
Handle statusUpdated;
Handle statusUpdateReceived;
GDBContext ctxs[MAX_DEBUG];
} GDBServer; } GDBServer;
Result GDB_InitializeServer(GDBServer *server); void GDB_InitializeServer(GDBServer *server);
void GDB_FinalizeServer(GDBServer *server); void GDB_FinalizeServer(GDBServer *server);
void GDB_IncrementServerReferenceCount(GDBServer *server);
void GDB_DecrementServerReferenceCount(GDBServer *server);
void GDB_RunServer(GDBServer *server); void GDB_RunServer(GDBServer *server);
void GDB_LockAllContexts(GDBServer *server); void GDB_LockAllContexts(GDBServer *server);
void GDB_UnlockAllContexts(GDBServer *server); void GDB_UnlockAllContexts(GDBServer *server);
GDBContext *GDB_SelectAvailableContext(GDBServer *server, u16 minPort, u16 maxPort); // Currently, transport ifaces are tied to client
GDBContext *GDB_FindAllocatedContextByPid(GDBServer *server, u32 pid);
GDBContext *GDB_SelectAvailableContext(GDBServer *server);
int GDB_AcceptClient(GDBContext *ctx); int GDB_AcceptClient(GDBContext *ctx);
int GDB_CloseClient(GDBContext *ctx); int GDB_CloseClient(GDBContext *ctx);
GDBContext *GDB_GetClient(GDBServer *server, u16 port); GDBContext *GDB_GetClient(GDBServer *server, TransportInterface *iface);
void GDB_ReleaseClient(GDBServer *server, GDBContext *ctx); void GDB_ReleaseClient(GDBServer *server, GDBContext *ctx);
int GDB_DoPacket(GDBContext *ctx); int GDB_DoPacket(GDBContext *ctx);

16
thermosphere/src/gdb/watchpoints.c
View file

@ -44,7 +44,7 @@ void GDB_ResetWatchpoints(void)
RecursiveLock_Init(&watchpointManagerLock); RecursiveLock_Init(&watchpointManagerLock);
lockInitialized = true; lockInitialized = true;
} }
RecursiveLock_Lock(&watchpointManagerLock); recursiveSpinlockLock(&watchpointManagerLock);
svcKernelSetState(0x10003); // enable monitor mode debugging svcKernelSetState(0x10003); // enable monitor mode debugging
svcKernelSetState(0x10004, 0); // disable watchpoint 0 svcKernelSetState(0x10004, 0); // disable watchpoint 0
@ -52,12 +52,12 @@ void GDB_ResetWatchpoints(void)
memset(&manager, 0, sizeof(WatchpointManager)); memset(&manager, 0, sizeof(WatchpointManager));
RecursiveLock_Unlock(&watchpointManagerLock); recursiveSpinlockUnlock(&watchpointManagerLock);
} }
int GDB_AddWatchpoint(GDBContext *ctx, u32 address, u32 size, WatchpointKind kind) int GDB_AddWatchpoint(GDBContext *ctx, u32 address, u32 size, WatchpointKind kind)
{ {
RecursiveLock_Lock(&watchpointManagerLock); recursiveSpinlockLock(&watchpointManagerLock);
u32 offset = address - (address & ~3); u32 offset = address - (address & ~3);
@ -95,26 +95,26 @@ int GDB_AddWatchpoint(GDBContext *ctx, u32 address, u32 size, WatchpointKind kin
watchpoint->kind = kind; watchpoint->kind = kind;
watchpoint->debug = ctx->debug; watchpoint->debug = ctx->debug;
ctx->watchpoints[ctx->nbWatchpoints++] = address; ctx->watchpoints[ctx->nbWatchpoints++] = address;
RecursiveLock_Unlock(&watchpointManagerLock); recursiveSpinlockUnlock(&watchpointManagerLock);
return 0; return 0;
} }
else else
{ {
RecursiveLock_Unlock(&watchpointManagerLock); recursiveSpinlockUnlock(&watchpointManagerLock);
return -EINVAL; return -EINVAL;
} }
} }
int GDB_RemoveWatchpoint(GDBContext *ctx, u32 address, WatchpointKind kind) int GDB_RemoveWatchpoint(GDBContext *ctx, u32 address, WatchpointKind kind)
{ {
RecursiveLock_Lock(&watchpointManagerLock); recursiveSpinlockLock(&watchpointManagerLock);
u32 id; u32 id;
for(id = 0; id < 2 && manager.watchpoints[id].address != address && manager.watchpoints[id].debug != ctx->debug; id++); for(id = 0; id < 2 && manager.watchpoints[id].address != address && manager.watchpoints[id].debug != ctx->debug; id++);
if(id == 2 || (kind != WATCHPOINT_DISABLED && manager.watchpoints[id].kind != kind)) if(id == 2 || (kind != WATCHPOINT_DISABLED && manager.watchpoints[id].kind != kind))
{ {
RecursiveLock_Unlock(&watchpointManagerLock); recursiveSpinlockUnlock(&watchpointManagerLock);
return -EINVAL; return -EINVAL;
} }
else else
@ -136,7 +136,7 @@ int GDB_RemoveWatchpoint(GDBContext *ctx, u32 address, WatchpointKind kind)
ctx->nbWatchpoints--; ctx->nbWatchpoints--;
} }
RecursiveLock_Unlock(&watchpointManagerLock); recursiveSpinlockUnlock(&watchpointManagerLock);
return 0; return 0;
} }

1
thermosphere/src/utils.h
View file

@ -20,6 +20,7 @@
#include "preprocessor.h" #include "preprocessor.h"
#include "debug_log.h" #include "debug_log.h"
#define MAX_CORE 4
#define BIT(n) (1u << (n)) #define BIT(n) (1u << (n))
#define BITL(n) (1ull << (n)) #define BITL(n) (1ull << (n))
#define MASK(n) (BIT(n) - 1) #define MASK(n) (BIT(n) - 1)