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thermosphere: retrieve wp direction

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TuxSH 2020-01-23 02:32:27 +00:00
parent abeaa72f94
commit 5de05ed8a8
3 changed files with 17 additions and 6 deletions
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13
thermosphere/src/gdb/debug.c
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@ -228,9 +228,16 @@ int GDB_SendStopReply(GDBContext *ctx, const DebugEventInfo *info)
case Exception_WatchpointLowerEl: {
static const char *kinds[] = { "", "r", "", "a" };
n = GDB_ParseExceptionFrame(buffer, ctx, SIGTRAP);
u32 kind = 3; // TODO: retrieve the actual wp direction (if it's a bidirectional wp or not)
sprintf(buffer + n, "%swatch:%016lx;", kinds[kind], info->frame->far_el2);
// Note: exception info doesn't provide us with the access size. Use 1.
bool wnr = (info->frame->esr_el2.iss & BIT(6)) != 0;
WatchpointLoadStoreControl dr = wnr ? WatchpointLoadStoreControl_Store : WatchpointLoadStoreControl_Load;
DebugControlRegister cr = retrieveSplitWatchpointConfig(info->frame->far_el2, 1, dr, false);
if (!cr.enabled) {
DEBUG("GDB: oops, unhandled watchpoint for core id %u, far=%016lx\n", info->coreId, info->frame->far_el2);
} else {
n = GDB_ParseExceptionFrame(buffer, ctx, SIGTRAP);
sprintf(buffer + n, "%swatch:%016lx;", kinds[cr.lsc], info->frame->far_el2);
}
}
// Note: we don't really support 32-bit sw breakpoints, we'll still report them

8
thermosphere/src/watchpoints.c
View file

@ -189,10 +189,14 @@ static DebugRegisterPair *doFindSplitWatchpoint(u64 addr, size_t size, Watchpoin
return NULL;
}
DebugRegisterPair *findSplitWatchpoint(u64 addr, size_t size, WatchpointLoadStoreControl direction, bool strict)
DebugControlRegister retrieveSplitWatchpointConfig(u64 addr, size_t size, WatchpointLoadStoreControl direction, bool strict)
{
recursiveSpinlockLock(&g_watchpointManager.lock);
DebugRegisterPair *ret = doFindSplitWatchpoint(addr, size, direction, strict);
DebugRegisterPair *wp = doFindSplitWatchpoint(addr, size, direction, strict);
DebugControlRegister ret = { 0 };
if (wp != NULL) {
ret = wp->cr;
}
recursiveSpinlockUnlock(&g_watchpointManager.lock);
return ret;
}

2
thermosphere/src/watchpoints.h
View file

@ -35,7 +35,7 @@ typedef struct WatchpointManager {
extern WatchpointManager g_watchpointManager;
void initWatchpoints(void);
DebugRegisterPair *findSplitWatchpoint(u64 addr, size_t size, WatchpointLoadStoreControl direction, bool strict);
DebugControlRegister retrieveSplitWatchpointConfig(u64 addr, size_t size, WatchpointLoadStoreControl direction, bool strict);
int addWatchpoint(u64 addr, size_t size, WatchpointLoadStoreControl direction);
int removeWatchpoint(u64 addr, size_t size, WatchpointLoadStoreControl direction);
int removeAllWatchpoints(void);