-/*\r
- AcessOS 1 - Dynamic Loader\r
- By thePowersGang\r
-*/\r
-#include "common.h"\r
-\r
-#define DEBUG 0\r
-\r
-#if DEBUG\r
-# define DEBUGS(v...) SysDebug(v)\r
-#else\r
-# define DEBUGS(v...) \r
-#endif\r
-\r
-// === PROTOTYPES ===\r
-Uint IsFileLoaded(char *file);
- int GetSymbolFromBase(Uint base, char *name, Uint *ret);\r
-\r
-// === GLOABLS ===\r
-#define MAX_LOADED_LIBRARIES 64\r
-#define MAX_STRINGS_BYTES 4096\r
-struct {\r
- Uint Base;\r
- char *Name;\r
-} gLoadedLibraries[MAX_LOADED_LIBRARIES];\r
-char gsLoadedStrings[MAX_STRINGS_BYTES];\r
-char *gsNextAvailString = gsLoadedStrings;\r
-//tLoadLib *gpLoadedLibraries = NULL;\r
-\r
-// === CODE ===\r
-Uint LoadLibrary(char *filename, char *SearchDir, char **envp)\r
-{\r
- char sTmpName[1024] = "/Acess/Libs/";\r
- Uint iArg;\r
- void (*fEntry)(int, int, char *[], char**);\r
- \r
- DEBUGS("LoadLibrary: (filename='%s', envp=0x%x)\n", filename, envp);\r
- \r
- // Create Temp Name\r
- strcpy(&sTmpName[12], filename);\r
- DEBUGS(" LoadLibrary: sTmpName='%s'\n", sTmpName);\r
- \r
- if( (iArg = IsFileLoaded(sTmpName)) )\r
- return iArg;\r
- \r
- // Load Library\r
- iArg = SysLoadBin(sTmpName, (Uint*)&fEntry);\r
- if(iArg == 0) {\r
- DEBUGS("LoadLibrary: RETURN 0\n");\r
- return 0;\r
- }\r
- \r
- DEBUGS(" LoadLibrary: iArg=0x%x, iEntry=0x%x\n", iArg, fEntry);\r
- \r
- // Load Symbols\r
- fEntry = (void*)DoRelocate( iArg, envp, sTmpName );\r
- \r
- // Call Entrypoint\r
- DEBUGS(" LoadLibrary: '%s' Entry 0x%x\n", filename, fEntry);\r
- fEntry(iArg, 0, NULL, envp);\r
- \r
- DEBUGS("LoadLibrary: RETURN 1\n");\r
- return iArg;\r
+/*
+ AcessOS 1 - Dynamic Loader
+ By thePowersGang
+*/
+#include "common.h"
+#include <stdint.h>
+#include <stdbool.h>
+#include <acess/sys.h>
+
+#define DEBUG 0
+
+#if DEBUG
+# define DEBUGS(v...) SysDebug(v)
+#else
+# define DEBUGS(v...)
+#endif
+
+#define MAX_QUEUED_ENTRYPOINTS 8
+
+// === IMPORTS ===
+extern const struct {
+ void *Value;
+ char *Name;
+} caLocalExports[];
+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
+ );
+ }
}
-\r
-/**\r
- * \fn Uint IsFileLoaded(char *file)\r
- * \brief Determine if a file is already loaded\r
- */\r
-Uint IsFileLoaded(char *file)\r
-{\r
- int i;\r
- DEBUGS("IsFileLoaded: (file='%s')", file);\r
- for( i = 0; i < MAX_LOADED_LIBRARIES; i++ )\r
- {\r
- if(gLoadedLibraries[i].Base == 0) break; // Last entry has Base set to NULL\r
- DEBUGS(" strcmp('%s', '%s')", gLoadedLibraries[i].Name, file);\r
- if(strcmp(gLoadedLibraries[i].Name, file) == 0) {\r
- DEBUGS("IsFileLoaded: Found %i (0x%x)", i, gLoadedLibraries[i].Base);\r
- return gLoadedLibraries[i].Base;\r
- }\r
- }\r
- DEBUGS("IsFileLoaded: Not Found");\r
- return 0;\r
-}\r
-\r
-/**\r
- * \fn void AddLoaded(char *File, Uint base)\r
- * \brief Add a file to the loaded list\r
+
+/**
+ * \brief Call queued up entry points (after relocations completed)
*/
-void AddLoaded(char *File, Uint base)
-{\r
- int i, length;\r
- char *name = gsNextAvailString;\r
- \r
- DEBUGS("AddLoaded: (File='%s', base=0x%x)", File, base);\r
- \r
- // Find a free slot\r
- for( i = 0; i < MAX_LOADED_LIBRARIES; i ++ )\r
- {\r
- if(gLoadedLibraries[i].Base == 0) break;\r
- }\r
- if(i == MAX_LOADED_LIBRARIES) {\r
- SysDebug("ERROR - ld-acess.so has run out of load slots!");\r
- return;\r
- }\r
- \r
- // Check space in string buffer\r
- length = strlen(File);\r
- if(&name[length+1] >= &gsLoadedStrings[MAX_STRINGS_BYTES]) {\r
- SysDebug("ERROR - ld-acess.so has run out of string buffer memory!");\r
- return;\r
- }\r
- \r
- // Set information\r
- gLoadedLibraries[i].Base = base;\r
- strcpy(name, File);\r
- gLoadedLibraries[i].Name = name;\r
- gsNextAvailString = &name[length+1];\r
- DEBUGS("'%s' (0x%x) loaded as %i\n", name, base, i);\r
+void CallQueuedEntrypoints(char **EnvP)
+{
+ while( giNumQueuedEntrypoints )
+ {
+ giNumQueuedEntrypoints --;
+ const struct sQueuedEntry *qe = &gaQueuedEntrypoints[giNumQueuedEntrypoints];
+ //_SysDebug("Calling EP for %p", qe->Base);
+ qe->Entry(qe->Base, 0, NULL, EnvP);
+ }
+}
+
+const char *FindLibrary(char *DestBuf, const char *SoName, const char *ExtraSearchDir)
+{
+ // -- #1: Executable Specified
+ if(ExtraSearchDir)
+ {
+ strcpy(DestBuf, ExtraSearchDir);
+ strcat(DestBuf, "/");
+ strcat(DestBuf, SoName);
+ if(file_exists(DestBuf)) return DestBuf;
+ }
+
+ // -- #2: System
+ strcpy(DestBuf, SYSTEM_LIB_DIR);
+ strcat(DestBuf, SoName);
+ if(file_exists(DestBuf)) return DestBuf;
+
+ // -- #3: Current Directory
+ if(file_exists(SoName)) return SoName;
+
+ return NULL;
+}
+
+/**
+ */
+void *LoadLibrary(const char *SoName, const char *SearchDir, char **envp)
+{
+ char sTmpName[1024];
+ void *base;
+
+ DEBUGS("LoadLibrary: (SoName='%s', SearchDir='%s', envp=%p)", SoName, SearchDir, envp);
+
+ // Create Temp Name
+ const char *filename = FindLibrary(sTmpName, SoName, SearchDir);
+ if(filename == NULL) {
+ DEBUGS("LoadLibrary: RETURN 0");
+ return 0;
+ }
+ DEBUGS(" LoadLibrary: filename='%s'", filename);
+
+ if( (base = IsFileLoaded(filename)) )
+ return base;
+
+ DEBUGS(" LoadLibrary: SysLoadBin()");
+ // Load Library
+ tLibEntry *fEntry;
+ base = _SysLoadBin(filename, (void**)&fEntry);
+ if(!base) {
+ DEBUGS("LoadLibrary: RETURN 0");
+ return 0;
+ }
+
+ DEBUGS(" LoadLibrary: iArg=%p, fEntry=%p", base, fEntry);
+
+ // Load Symbols
+ fEntry = DoRelocate( base, envp, filename );
+ if( !fEntry ) {
+ return 0;
+ }
+
+ // Call Entrypoint
+ // - 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 success");
+ return base;
+}
+
+/**
+ * \fn Uint IsFileLoaded(char *file)
+ * \brief Determine if a file is already loaded
+ */
+void *IsFileLoaded(const char *file)
+{
+ int i;
+ DEBUGS("IsFileLoaded: (file='%s')", file);
+
+ // Applications link against either libld-acess.so or ld-acess.so
+ if( strcmp(file, "/Acess/Libs/libld-acess.so") == 0
+ || strcmp(file, "/Acess/Libs/ld-acess.so") == 0 )
+ {
+ DEBUGS("IsFileLoaded: Found local (%p)", &gLinkedBase);
+ return &gLinkedBase;
+ }
+
+ for( i = 0; i < MAX_LOADED_LIBRARIES; i++ )
+ {
+ if(gLoadedLibraries[i].Base == 0) break; // Last entry has Base set to NULL
+ DEBUGS(" strcmp('%s', '%s')", gLoadedLibraries[i].Name, file);
+ if(strcmp(gLoadedLibraries[i].Name, file) == 0) {
+ DEBUGS("IsFileLoaded: Found %i (%p)", i, gLoadedLibraries[i].Base);
+ return gLoadedLibraries[i].Base;
+ }
+ }
+ DEBUGS("IsFileLoaded: Not Found");
+ return 0;
+}
+
+/**
+ * \fn void AddLoaded(char *File, Uint base)
+ * \brief Add a file to the loaded list
+ */
+void AddLoaded(const char *File, void *base)
+{
+ int i, length;
+ char *name = gsNextAvailString;
+
+ DEBUGS("AddLoaded: (File='%s', base=%p)", File, base);
+
+ // Find a free slot
+ for( i = 0; i < MAX_LOADED_LIBRARIES; i ++ )
+ {
+ if(gLoadedLibraries[i].Base == 0) break;
+ }
+ if(i == MAX_LOADED_LIBRARIES) {
+ SysDebug("ERROR - ld-acess.so has run out of load slots!");
+ return;
+ }
+
+ // Check space in string buffer
+ length = strlen(File);
+ if(&name[length+1] >= &gsLoadedStrings[MAX_STRINGS_BYTES]) {
+ SysDebug("ERROR - ld-acess.so has run out of string buffer memory!");
+ return;
+ }
+
+ // Set information
+ gLoadedLibraries[i].Base = base;
+ strcpy(name, File);
+ gLoadedLibraries[i].Name = name;
+ gsNextAvailString = &name[length+1];
+ DEBUGS("'%s' (%p) loaded as %i", name, base, i);
return;
-}\r
-\r
-/**\r
- * \fn void Unload(Uint Base)\r
- */\r
-void Unload(Uint Base)\r
-{ \r
- int i, j;\r
- int id;\r
- char *str;\r
- for( id = 0; id < MAX_LOADED_LIBRARIES; id++ )\r
- {\r
- if(gLoadedLibraries[id].Base == Base) break;\r
- }\r
- if(id == MAX_LOADED_LIBRARIES) return;\r
- \r
- // Unload Binary\r
- SysUnloadBin( Base );\r
- // Save String Pointer\r
- str = gLoadedLibraries[id].Name;\r
- \r
- // Compact Loaded List\r
- j = id;\r
- for( i = j + 1; i < MAX_LOADED_LIBRARIES; i++, j++ )\r
- {\r
- if(gLoadedLibraries[i].Base == 0) break;\r
- // Compact String\r
- strcpy(str, gLoadedLibraries[i].Name);\r
- str += strlen(str)+1;\r
- // Compact Entry\r
- gLoadedLibraries[j].Base = gLoadedLibraries[i].Base;\r
- gLoadedLibraries[j].Name = str;\r
- }\r
- \r
- // NULL Last Entry\r
- gLoadedLibraries[j].Base = 0;\r
- gLoadedLibraries[j].Name = NULL;\r
- // Save next string\r
- gsNextAvailString = str;\r
-}\r
-\r
+}
+
/**
- \fn Uint GetSymbol(char *name)
+ * \fn void Unload(Uint Base)
+ */
+void Unload(void *Base)
+{
+ int i, j;
+ int id;
+ char *str;
+ for( id = 0; id < MAX_LOADED_LIBRARIES; id++ )
+ {
+ if(gLoadedLibraries[id].Base == Base) break;
+ }
+ if(id == MAX_LOADED_LIBRARIES) return;
+
+ // Unload Binary
+ _SysUnloadBin( Base );
+ // Save String Pointer
+ str = gLoadedLibraries[id].Name;
+
+ // Compact Loaded List
+ j = id;
+ for( i = j + 1; i < MAX_LOADED_LIBRARIES; i++, j++ )
+ {
+ if(gLoadedLibraries[i].Base == 0) break;
+ // Compact String
+ strcpy(str, gLoadedLibraries[i].Name);
+ str += strlen(str)+1;
+ // Compact Entry
+ gLoadedLibraries[j].Base = gLoadedLibraries[i].Base;
+ gLoadedLibraries[j].Name = str;
+ }
+
+ // NULL Last Entry
+ gLoadedLibraries[j].Base = 0;
+ gLoadedLibraries[j].Name = NULL;
+ // Save next string
+ gsNextAvailString = str;
+}
+
+/**
+ \fn Uint GetSymbol(const char *name)
\brief Gets a symbol value from a loaded library
*/
-Uint GetSymbol(char *name)
-{\r
- int i;
- Uint ret;\r
- for(i=0;i<sizeof(gLoadedLibraries)/sizeof(gLoadedLibraries[0]);i++)\r
- {\r
- if(gLoadedLibraries[i].Base == 0) break;\r
+int GetSymbol(const char *name, void **Value, size_t *Size, void *IgnoreBase)
+{
+ //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;
+ }
+ }
+
+ bool have_weak = false;
+ for(int i = 0; i < MAX_LOADED_LIBRARIES && gLoadedLibraries[i].Base != 0; i ++)
+ {
+ // Allow ignoring the current module
+ if( gLoadedLibraries[i].Base == IgnoreBase ) {
+ //SysDebug("GetSymbol: Ignore %p", gLoadedLibraries[i].Base);
+ continue ;
+ }
- //SysDebug(" GetSymbol: Trying 0x%x, '%s'\n",\r
+ //SysDebug(" GetSymbol: Trying 0x%x, '%s'",
// gLoadedLibraries[i].Base, gLoadedLibraries[i].Name);
- if(GetSymbolFromBase(gLoadedLibraries[i].Base, name, &ret)) return ret;\r
- }\r
- SysDebug("GetSymbol: === Symbol '%s' not found ===\n", name);\r
- return 0;
+ 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;
+ }
}
/**
\fn int GetSymbolFromBase(Uint base, char *name, Uint *ret)
\breif Gets a symbol from a specified library
*/
-int GetSymbolFromBase(Uint base, char *name, Uint *ret)
+int GetSymbolFromBase(void *base, const char *name, void **ret, size_t *Size)
{
- if(*(Uint32*)base == (0x7F|('E'<<8)|('L'<<16)|('F'<<24)))
- return ElfGetSymbol(base, name, ret);
- if(*(Uint16*)base == ('M'|('Z'<<8)))
- return PE_GetSymbol(base, name, ret);
+ uint8_t *hdr = base;
+ if(hdr[0] == 0x7F && hdr[1] == 'E' && hdr[2] == 'L' && hdr[3] == 'F')
+ return ElfGetSymbol(base, name, ret, Size);
+ if(hdr[0] == 'M' && hdr[1] == 'Z')
+ return PE_GetSymbol(base, name, ret, Size);
+ SysDebug("Unknown type at %p (%02x %02x %02x %02x)", base,
+ hdr[0], hdr[1], hdr[2], hdr[3]);
return 0;
}
git.ucc.asn.au / tpg / acess2.git / blobdiff
UCC git Repository :: git.ucc.asn.au