X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Usermode%2FLibraries%2Fld-acess.so_src%2Floadlib.c;h=31dcbd8acfa23840d954df1e2b555c7a78fee44f;hb=7f2068235fabc311332962711cd3220ce8ee2638;hp=53073019330baac99c440289cd7c442a2165743d;hpb=b806b8f55067584cb90fe20277235369a1111c66;p=tpg%2Facess2.git

diff --git a/Usermode/Libraries/ld-acess.so_src/loadlib.c b/Usermode/Libraries/ld-acess.so_src/loadlib.c
index 53073019..31dcbd8a 100644
--- a/Usermode/Libraries/ld-acess.so_src/loadlib.c
+++ b/Usermode/Libraries/ld-acess.so_src/loadlib.c
@@ -4,6 +4,7 @@
 */
 #include "common.h"
 #include <stdint.h>
+#include <stdbool.h>
 #include <acess/sys.h>
 
 #define DEBUG	0
@@ -14,8 +15,7 @@
 # define DEBUGS(v...)	
 #endif
 
-// === PROTOTYPES ===
-void	*IsFileLoaded(const char *file);
+#define MAX_QUEUED_ENTRYPOINTS	8
 
 // === IMPORTS ===
 extern const struct {
@@ -26,13 +26,50 @@ extern const int	ciNumLocalExports;
 extern char	**gEnvP;
 extern char	gLinkedBase[];
 
+// === TYPES ===
+typedef void	tLibEntry(void *, int, char *[], char**);
+
+// === PROTOTYPES ===
+void	*IsFileLoaded(const char *file);
+
 // === GLOABLS ===
 tLoadedLib	gLoadedLibraries[MAX_LOADED_LIBRARIES];
 char	gsLoadedStrings[MAX_STRINGS_BYTES];
 char	*gsNextAvailString = gsLoadedStrings;
+struct sQueuedEntry {
+	void	*Base;
+	tLibEntry	*Entry;
+}	gaQueuedEntrypoints[MAX_QUEUED_ENTRYPOINTS];
+ int	giNumQueuedEntrypoints;
 //tLoadLib	*gpLoadedLibraries = NULL;
 
 // === CODE ===
+void ldacess_DumpLoadedLibraries(void)
+{
+	for( int i = 0; i < MAX_LOADED_LIBRARIES; i ++ )
+	{
+		if(gLoadedLibraries[i].Base == 0)	break;	// Last entry has Base set to NULL
+		_SysDebug("%p: %s",
+			gLoadedLibraries[i].Base,
+			gLoadedLibraries[i].Name
+			);
+	}
+}
+
+/**
+ * \brief Call queued up entry points (after relocations completed) 
+ */
+void CallQueuedEntrypoints(char **EnvP)
+{
+	while( giNumQueuedEntrypoints )
+	{
+		giNumQueuedEntrypoints --;
+		const struct sQueuedEntry	*qe = &gaQueuedEntrypoints[giNumQueuedEntrypoints];
+		DEBUGS("Calling EP %p for %p", qe->Entry, qe->Base);
+		qe->Entry(qe->Base, 0, NULL, EnvP);
+	}
+}
+
 const char *FindLibrary(char *DestBuf, const char *SoName, const char *ExtraSearchDir)
 {	
 	// -- #1: Executable Specified
@@ -60,14 +97,12 @@ const char *FindLibrary(char *DestBuf, const char *SoName, const char *ExtraSear
 void *LoadLibrary(const char *SoName, const char *SearchDir, char **envp)
 {
 	char	sTmpName[1024];
-	const char	*filename;
 	void	*base;
-	void	(*fEntry)(void *, int, char *[], char**);
 	
 	DEBUGS("LoadLibrary: (SoName='%s', SearchDir='%s', envp=%p)", SoName, SearchDir, envp);
 	
 	// Create Temp Name
-	filename = FindLibrary(sTmpName, SoName, SearchDir);
+	const char *filename = FindLibrary(sTmpName, SoName, SearchDir);
 	if(filename == NULL) {
 		DEBUGS("LoadLibrary: RETURN 0");
 		return 0;
@@ -79,6 +114,7 @@ void *LoadLibrary(const char *SoName, const char *SearchDir, char **envp)
 
 	DEBUGS(" LoadLibrary: SysLoadBin()");	
 	// Load Library
+	tLibEntry	*fEntry;
 	base = _SysLoadBin(filename, (void**)&fEntry);
 	if(!base) {
 		DEBUGS("LoadLibrary: RETURN 0");
@@ -94,10 +130,17 @@ void *LoadLibrary(const char *SoName, const char *SearchDir, char **envp)
 	}
 	
 	// Call Entrypoint
-	DEBUGS(" LoadLibrary: '%s' Entry %p", SoName, fEntry);
-	fEntry(base, 0, NULL, gEnvP);
+	// - TODO: Queue entrypoint calls
+	if( giNumQueuedEntrypoints >= MAX_QUEUED_ENTRYPOINTS ) {
+		SysDebug("ERROR - Maximum number of queued entrypoints exceeded on %p '%s'",
+			base, SoName);
+		return 0;
+	}
+	gaQueuedEntrypoints[giNumQueuedEntrypoints].Base  = base;
+	gaQueuedEntrypoints[giNumQueuedEntrypoints].Entry = fEntry;
+	giNumQueuedEntrypoints ++;
 	
-	DEBUGS("LoadLibrary: RETURN 1");
+	DEBUGS("LoadLibrary: RETURN success");
 	return base;
 }
 
@@ -211,34 +254,50 @@ void Unload(void *Base)
  \fn Uint GetSymbol(const char *name)
  \brief Gets a symbol value from a loaded library
 */
-int GetSymbol(const char *name, void **Value, size_t *Size)
+int GetSymbol(const char *name, void **Value, size_t *Size, void *IgnoreBase)
 {
-	 int	i;
-	
-	//SysDebug("ciNumLocalExports = %i", ciNumLocalExports);
-	for(i=0;i<ciNumLocalExports;i++)
+	//SysDebug("GetSymbol: (%s)");
+	for( int i = 0; i < ciNumLocalExports; i ++ )
 	{
 		if( strcmp(caLocalExports[i].Name, name) == 0 ) {
 			*Value = caLocalExports[i].Value;
 			if(Size)
 				*Size = 0;
+			//SysDebug("GetSymbol: Local %p+0x%x", *Value, 0);
 			return 1;
 		}
 	}
-	
-	// Entry 0 is ld-acess, ignore it
-	for(i = 0; i < MAX_LOADED_LIBRARIES; i ++)
+
+	bool have_weak = false;	
+	for(int i = 0; i < MAX_LOADED_LIBRARIES && gLoadedLibraries[i].Base != 0; i ++)
 	{
-		if(gLoadedLibraries[i].Base == 0)
-			break;
+		// Allow ignoring the current module
+		if( gLoadedLibraries[i].Base == IgnoreBase ) {
+			//SysDebug("GetSymbol: Ignore %p", gLoadedLibraries[i].Base);
+			continue ;
+		}
 		
 		//SysDebug(" GetSymbol: Trying 0x%x, '%s'",
 		//	gLoadedLibraries[i].Base, gLoadedLibraries[i].Name);
-		if(GetSymbolFromBase(gLoadedLibraries[i].Base, name, Value, Size))
-			return 1;
+		void	*tmpval;
+		size_t	tmpsize;
+		int rv = GetSymbolFromBase(gLoadedLibraries[i].Base, name, &tmpval, &tmpsize);
+		if(rv)
+		{
+			*Value = tmpval;
+			*Size = tmpsize;
+			if( rv == 1 ) {
+				return 1;
+			}
+			have_weak = true;
+		}
+	}
+	if(have_weak) {
+		return 2;
+	}
+	else {
+		return 0;
 	}
-	SysDebug("GetSymbol: === Symbol '%s' not found ===", name);
-	return 0;
 }
 
 /**