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gdb: add extended-remote support, implement vAttach

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This commit is contained in:
TuxSH 2019-04-12 23:40:51 +02:00
parent e57b546dd4
commit 763a1de8d3
7 changed files with 95 additions and 20 deletions
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10
sysmodules/rosalina/include/gdb.h
View File

@ -62,10 +62,11 @@ enum
GDB_FLAG_SELECTED = 1,
GDB_FLAG_USED = 2,
GDB_FLAG_ALLOCATED_MASK = GDB_FLAG_SELECTED | GDB_FLAG_USED,
GDB_FLAG_NOACK = 4,
GDB_FLAG_PROCESS_CONTINUING = 8,
GDB_FLAG_TERMINATE_PROCESS = 16,
GDB_FLAG_ATTACHED_AT_START = 32,
GDB_FLAG_EXTENDED_REMOTE = 4,
GDB_FLAG_NOACK = 8,
GDB_FLAG_PROCESS_CONTINUING = 16,
GDB_FLAG_TERMINATE_PROCESS = 32,
GDB_FLAG_ATTACHED_AT_START = 64,
};
typedef enum GDBState
@ -139,3 +140,4 @@ Result GDB_AttachToProcess(GDBContext *ctx);
void GDB_DetachFromProcess(GDBContext *ctx);
GDB_DECLARE_HANDLER(Unsupported);
GDB_DECLARE_HANDLER(EnableExtendedMode);

1
sysmodules/rosalina/include/gdb/debug.h
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@ -28,6 +28,7 @@
#include "gdb.h"
GDB_DECLARE_VERBOSE_HANDLER(Attach);
GDB_DECLARE_HANDLER(Detach);
GDB_DECLARE_HANDLER(Kill);
GDB_DECLARE_HANDLER(Break);

10
sysmodules/rosalina/source/gdb.c
View File

@ -26,6 +26,7 @@
#include "gdb.h"
#include "gdb/net.h"
#include "gdb/server.h"
#include "gdb/debug.h"
@ -138,8 +139,6 @@ void GDB_DetachFromProcess(GDBContext *ctx)
svcKernelSetState(0x10002, ctx->pid, false);
memset(ctx->svcMask, 0, 32);
memset(ctx->memoryOsInfoXmlData, 0, sizeof(ctx->memoryOsInfoXmlData));
memset(ctx->processesOsInfoXmlData, 0, sizeof(ctx->processesOsInfoXmlData));
memset(ctx->threadListData, 0, sizeof(ctx->threadListData));
ctx->threadListDataPos = 0;
@ -184,3 +183,10 @@ GDB_DECLARE_HANDLER(Unsupported)
{
return GDB_ReplyEmpty(ctx);
}
GDB_DECLARE_HANDLER(EnableExtendedMode)
{
ctx->flags |= GDB_FLAG_EXTENDED_REMOTE;
return GDB_ReplyOk(ctx);
}

37
sysmodules/rosalina/source/gdb/debug.c
View File

@ -25,6 +25,7 @@
*/
#include "gdb/debug.h"
#include "gdb/server.h"
#include "gdb/verbose.h"
#include "gdb/net.h"
#include "gdb/thread.h"
@ -35,6 +36,23 @@
#include <stdlib.h>
#include <signal.h>
GDB_DECLARE_VERBOSE_HANDLER(Attach)
{
// Extended remote only
if (!(ctx->flags & GDB_FLAG_EXTENDED_REMOTE))
return GDB_ReplyErrno(ctx, EPERM);
u32 pid;
if(GDB_ParseHexIntegerList(&pid, ctx->commandData, 1, 0) == NULL)
return GDB_ReplyErrno(ctx, EILSEQ);
RecursiveLock_Lock(&ctx->lock);
ctx->pid = pid;
Result r = GDB_AttachToProcess(ctx);
RecursiveLock_Unlock(&ctx->lock);
return R_SUCCEEDED(r) ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_ReplyErrno(ctx, EPERM);
}
/*
Since we can't select particular threads to continue (and that's uncompliant behavior):
- if we continue the current thread, continue all threads
@ -44,6 +62,15 @@
GDB_DECLARE_HANDLER(Detach)
{
ctx->state = GDB_STATE_DETACHING;
if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE)
{
// detach immediately
RecursiveLock_Lock(&ctx->lock);
svcSignalEvent(ctx->parent->statusUpdated); // note: monitor will be waiting for lock
GDB_DetachFromProcess(ctx);
ctx->flags = GDB_FLAG_USED;
RecursiveLock_Unlock(&ctx->lock);
}
return GDB_ReplyOk(ctx);
}
@ -51,6 +78,14 @@ GDB_DECLARE_HANDLER(Kill)
{
ctx->state = GDB_STATE_DETACHING;
ctx->flags |= GDB_FLAG_TERMINATE_PROCESS;
if (ctx->flags & GDB_FLAG_EXTENDED_REMOTE)
{
// detach & kill immediately
RecursiveLock_Lock(&ctx->lock);
svcSignalEvent(ctx->parent->statusUpdated); // note: monitor will be waiting for lock
GDB_DetachFromProcess(ctx);
RecursiveLock_Unlock(&ctx->lock);
}
return 0;
}
@ -153,7 +188,7 @@ GDB_DECLARE_VERBOSE_HANDLER(Continue)
GDB_DECLARE_HANDLER(GetStopReason)
{
return GDB_SendStopReply(ctx, &ctx->latestDebugEvent);
return ctx->debug != 0 ? GDB_SendStopReply(ctx, &ctx->latestDebugEvent) : GDB_SendPacket(ctx, "W00", 3); // "process exited" if nothing
}
static int GDB_ParseCommonThreadInfo(char *out, GDBContext *ctx, int sig)

38
sysmodules/rosalina/source/gdb/server.c
View File

@ -167,9 +167,10 @@ GDBContext *GDB_FindAllocatedContextByPid(GDBServer *server, u32 pid)
int GDB_AcceptClient(GDBContext *ctx)
{
Result r;
Result r = 0;
RecursiveLock_Lock(&ctx->lock);
if (ctx->flags & GDB_FLAG_SELECTED)
r = GDB_AttachToProcess(ctx);
RecursiveLock_Unlock(&ctx->lock);
@ -182,7 +183,6 @@ int GDB_CloseClient(GDBContext *ctx)
svcSignalEvent(ctx->parent->statusUpdated); // note: monitor will be waiting for lock
GDB_DetachFromProcess(ctx);
RecursiveLock_Unlock(&ctx->lock);
return 0;
}
@ -192,7 +192,7 @@ GDBContext *GDB_GetClient(GDBServer *server, u16 port)
GDBContext *ctx = NULL;
for (u32 i = 0; i < MAX_DEBUG; i++)
{
if ((server->ctxs[i].flags & GDB_FLAG_SELECTED) && server->ctxs[i].localPort == port)
if (server->ctxs[i].localPort == port)
{
ctx = &server->ctxs[i];
break;
@ -201,6 +201,31 @@ GDBContext *GDB_GetClient(GDBServer *server, u16 port)
if (ctx != NULL)
{
// Context already tied to a port/selected
// Extended remote support disabled
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
{
// 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;
@ -221,6 +246,10 @@ void GDB_ReleaseClient(GDBServer *server, GDBContext *ctx)
ctx->catchThreadEvents = false;
memset(&ctx->latestDebugEvent, 0, sizeof(DebugEventInfo));
memset(ctx->memoryOsInfoXmlData, 0, sizeof(ctx->memoryOsInfoXmlData));
memset(ctx->processesOsInfoXmlData, 0, sizeof(ctx->processesOsInfoXmlData));
RecursiveLock_Unlock(&ctx->lock);
}
@ -231,6 +260,7 @@ static const struct
} gdbCommandHandlers[] =
{
{ '?', GDB_HANDLER(GetStopReason) },
{ '!', GDB_HANDLER(EnableExtendedMode) },
{ 'c', GDB_HANDLER(Continue) },
{ 'C', GDB_HANDLER(Continue) },
{ 'D', GDB_HANDLER(Detach) },
@ -292,7 +322,7 @@ int GDB_DoPacket(GDBContext *ctx)
RecursiveLock_Unlock(&ctx->lock);
if(ctx->state == GDB_STATE_DETACHING)
return -1;
return (ctx->flags & GDB_FLAG_EXTENDED_REMOTE) ? ret : -1;
if((oldFlags & GDB_FLAG_PROCESS_CONTINUING) && !(ctx->flags & GDB_FLAG_PROCESS_CONTINUING))
{

1
sysmodules/rosalina/source/gdb/verbose.c
View File

@ -34,6 +34,7 @@ static const struct
GDBCommandHandler handler;
} gdbVerboseCommandHandlers[] =
{
{ "Attach", GDB_VERBOSE_HANDLER(Attach) },
{ "Cont?", GDB_VERBOSE_HANDLER(ContinueSupported) },
{ "Cont", GDB_VERBOSE_HANDLER(Continue) },
{ "MustReplyEmpty", GDB_HANDLER(Unsupported) },

16
sysmodules/rosalina/source/gdb/xfer.c
View File

@ -144,17 +144,17 @@ GDB_DECLARE_XFER_OSDATA_HANDLER(Processes)
if(ctx->processesOsInfoXmlData[0] == 0)
{
static const char header[] =
"<?xml version=\"1.0\"?>\n"
"<!DOCTYPE target SYSTEM \"osdata.dtd\">\n"
"<osdata type=\"processes\">\n";
/*"<?xml version=\"1.0\"?>"
"<!DOCTYPE target SYSTEM \"osdata.dtd\">" IDA rejects the xml header*/
"<osdata type=\"processes\">";
static const char item[] =
" <item>\n"
" <column name=\"pid\">%lu</column>\n"
" <column name=\"command\">%s</column>\n"
" </item>\n";
"<item>"
"<column name=\"pid\">%lu</column>"
"<column name=\"command\">%s</column>"
"</item>";
static const char footer[] = "</osdata>\n";
static const char footer[] = "</osdata>";
int n;
u32 pos = 0;