Usermode/libc - Makefile update, move stdin/... to .data for R_*_COPY to work

[tpg/acess2.git] / Usermode / Libraries / libc.so_src / stub.c

diff --git a/Usermode/Libraries/libc.so_src/stub.c b/Usermode/Libraries/libc.so_src/stub.c
index a10d9d1..922943e 100644 (file)
--- a/Usermode/Libraries/libc.so_src/stub.c
+++ b/Usermode/Libraries/libc.so_src/stub.c
@@ -2,13 +2,39 @@
  * AcessOS Basic C Library\r
  */\r
 #include "stdio_int.h"\r
+#include "lib.h"\r
+#include <stdio.h>\r
+#include <stdlib.h>\r
+#include <acess/sys.h>\r
 \r
-extern char **_envp;\r
-extern struct sFILE    _iob[];\r
-extern struct sFILE    *stdin;\r
-extern struct sFILE    *stdout;\r
-extern struct sFILE    *stderr;\r
+#define USE_CPUID      0\r
 \r
+// === TYPES ===\r
+typedef struct {\r
+       intptr_t        Base;\r
+       char    *Name;\r
+}      tLoadedLib;\r
+\r
+// === PROTOTYPES ===\r
+#if USE_CPUID\r
+static void    cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX);\r
+#endif\r
+ int   ErrorHandler(int Fault);\r
+\r
+// === IMPORTS ===\r
+extern tLoadedLib      gLoadedLibraries[64];\r
+extern void    *_crt0_exit_handler;\r
+extern void    _stdio_init(void);\r
+extern void    _call_atexit_handlers(void);\r
+\r
+// === GLOBALS ===\r
+extern char **environ;\r
+// --- CPU Features ---\r
+#if USE_CPUID\r
+tCPUID gCPU_Features;\r
+#endif\r
+\r
+// === CODE ===\r
 /**\r
  * \fn int SoMain()\r
  * \brief Stub Entrypoint\r
@@ -17,18 +43,65 @@ extern struct sFILE *stderr;
  * \param argv Unused - Arguments (NULL for current version of ld-acess)\r
  * \param envp Environment Pointer\r
  */\r
-int SoMain(unsigned int BaseAddress, int argc, char **argv, char **envp)\r
+int SoMain(UNUSED(uintptr_t, BaseAddress), UNUSED(int, argc), UNUSED(char **, argv), char **envp)\r
+{\r
+       environ = envp;\r
+\r
+       _stdio_init();  \r
+       \r
+       #if USE_CPUID\r
+       {\r
+               uint32_t        ecx, edx;\r
+               cpuid(1, NULL, NULL, &edx, &ecx);\r
+               gCPU_Features.SSE  = edx & (1 << 25);   // SSE\r
+               gCPU_Features.SSE2 = edx & (1 << 26);   // SSE2\r
+       }\r
+       #endif\r
+       \r
+       _crt0_exit_handler = _call_atexit_handlers;\r
+\r
+       // Set Error handler\r
+       _SysSetFaultHandler(ErrorHandler);\r
+       \r
+       return 0;\r
+}\r
+\r
+int ErrorHandler(int Fault)\r
+{\r
+        int    i;\r
+\r
+       extern void ldacess_DumpLoadedLibraries(void);  \r
+       ldacess_DumpLoadedLibraries();\r
+\r
+       fprintf(stderr, "ErrorHandler: (Fault = %i)\n", Fault);\r
+       fprintf(stderr, "Loaded Libraries:\n");\r
+       for( i = 0; i < 64; i ++ )\r
+       {\r
+               //if(gLoadedLibraries[i].Base == 0)     continue;\r
+       //      fprintf(stderr, "%02i: %p  %s\n", i, gLoadedLibraries[i].Base, gLoadedLibraries[i].Name);\r
+       }\r
+       fprintf(stderr, "\n");\r
+       exit(-1);\r
+       return -1;\r
+}\r
+\r
+#if USE_CPUID\r
+/**\r
+ * \brief Call the CPUID opcode\r
+ */\r
+static void cpuid(uint32_t Num, uint32_t *EAX, uint32_t *EBX, uint32_t *EDX, uint32_t *ECX)\r
 {\r
-       // Init for env.c\r
-       _envp = envp;\r
+       uint32_t        eax, ebx, edx, ecx;\r
        \r
-       // Init FileIO Pointers\r
-       stdin = &_iob[0];\r
-       stdin->FD = 0;  stdin->Flags = FILE_FLAG_MODE_READ;\r
-       stdout = &_iob[1];\r
-       stdout->FD = 1; stdout->Flags = FILE_FLAG_MODE_WRITE;\r
-       stderr = &_iob[2];\r
-       stderr->FD = 2; stderr->Flags = FILE_FLAG_MODE_WRITE;\r
+       __asm__ __volatile__ (\r
+               "cpuid"\r
+               : "=a"(eax), "=c"(ecx), "=d"(edx)\r
+               : "a"(Num)\r
+               );\r
        \r
-       return 1;\r
+       if(EAX) *EAX = eax;\r
+       if(EBX) *EBX = ebx;\r
+       if(EDX) *EDX = edx;\r
+       if(ECX) *ECX = ecx;\r
 }\r
+#endif\r