[uClibc-cvs] uClibc/ldso/ldso/i386 dl-startup.h, 1.4, 1.5 dl-sysdep.h, 1.10, 1.11

[Erik Andersen]

Update of /var/cvs/uClibc/ldso/ldso/i386
In directory nail:/tmp/cvs-serv25724/i386

Modified Files:
	dl-startup.h dl-sysdep.h 
Log Message:
Seperate out the startup stuff from the non-startup stuff.
Begin converting some big ugly macros to inline functions
instead


Index: dl-sysdep.h
===================================================================
RCS file: /var/cvs/uClibc/ldso/ldso/i386/dl-sysdep.h,v
retrieving revision 1.10
retrieving revision 1.11
diff -u -d -r1.10 -r1.11
--- dl-sysdep.h	14 Feb 2004 11:30:32 -0000	1.10
+++ dl-sysdep.h	17 Feb 2004 10:55:55 -0000	1.11
@@ -1,72 +1,24 @@
+/* vi: set sw=4 ts=4: */
 /*
  * Various assmbly language/system dependent  hacks that are required
  * so that we can minimize the amount of platform specific code.
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen at codpoet.org>
  */
 
-/*
- * Define this if the system uses RELOCA.
- */
+/* Define this if the system uses RELOCA.  */
 #undef ELF_USES_RELOCA
 
-/*
- * Get a pointer to the argv array.  On many platforms this can be just
- * the address if the first argument, on other platforms we need to
- * do something a little more subtle here.
- */
-#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) & ARGS)
-
-/*
- * Initialization sequence for a GOT.
- */
-#define INIT_GOT(GOT_BASE,MODULE)				\
-do {								\
-  GOT_BASE[2] = (unsigned long) _dl_linux_resolve;		\
-  GOT_BASE[1] = (unsigned long) MODULE;				\
+/* Initialization sequence for the GOT.  */
+#define INIT_GOT(GOT_BASE,MODULE)							\
+do {														\
+	GOT_BASE[2] = (unsigned long) _dl_linux_resolve;		\
+	GOT_BASE[1] = (unsigned long) MODULE;					\
 } while(0)
 
-/*
- * Here is a macro to perform a relocation.  This is only used when
- * bootstrapping the dynamic loader.  RELP is the relocation that we
- * are performing, REL is the pointer to the address we are relocating.
- * SYMBOL is the symbol involved in the relocation, and LOAD is the
- * load address.
- */
-#define PERFORM_BOOTSTRAP_RELOC(RELP,REL,SYMBOL,LOAD,SYMTAB)	\
-	switch(ELF32_R_TYPE((RELP)->r_info)){			\
-	case R_386_32:						\
-	  *REL += SYMBOL;					\
-	  break;						\
-	case R_386_PC32:					\
-	  *REL += SYMBOL - (unsigned long) REL;			\
-	  break;						\
-	case R_386_GLOB_DAT:					\
-	case R_386_JMP_SLOT:					\
-	  *REL = SYMBOL;					\
-	  break;						\
-	case R_386_RELATIVE:					\
-	  *REL += (unsigned long) LOAD;				\
-	  break;						\
-	default:						\
-	  _dl_exit(1);						\
-	}
-
-
-/*
- * Transfer control to the user's application, once the dynamic loader
- * is done.  This routine has to exit the current function, then 
- * call the _dl_elf_main function.
- */
-#define START()							\
-	__asm__ volatile ("leave\n\t"				\
-		    "jmp *%%eax\n\t"				\
-		    : "=a" (status) :	"a" (_dl_elf_main))
-
-
-
 /* Here we define the magic numbers that this dynamic loader should accept */
-
 #define MAGIC1 EM_386
 #undef  MAGIC2
+
 /* Used for error messages */
 #define ELF_TARGET "386"
 

Index: dl-startup.h
===================================================================
RCS file: /var/cvs/uClibc/ldso/ldso/i386/dl-startup.h,v
retrieving revision 1.4
retrieving revision 1.5
diff -u -d -r1.4 -r1.5
--- dl-startup.h	7 Feb 2004 12:26:16 -0000	1.4
+++ dl-startup.h	17 Feb 2004 10:55:55 -0000	1.5
@@ -1,7 +1,51 @@
-/* Any assmbly language/system dependent hacks needed to setup boot1.c so it
- * will work as expected and cope with whatever platform specific wierdness is
- * needed for this architecture.  See arm/boot1_arch.h for an example of what
- * can be done.
+/* vi: set sw=4 ts=4: */
+/*
+ * Architecture specific code used by dl-startup.c
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen at codpoet.org>
  */
 
-#define DL_BOOT(X) void __attribute__ ((unused)) _dl_boot (X)
+/* For x86 we do not need any special setup so go right to _dl_boot() */
+#define DL_BOOT(X) __attribute__ ((unused)) void _dl_boot (X)
+
+/* Get a pointer to the argv array.  On many platforms this can be just
+ * the address if the first argument, on other platforms we need to
+ * do something a little more subtle here.  */
+#define GET_ARGV(ARGVP, ARGS) ARGVP = ((unsigned long*) & ARGS)
+
+/* Handle relocation of the symbols in the dynamic loader. */
+static inline
+void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr,
+	unsigned long symbol_addr, unsigned long load_addr, Elf32_Sym *symtab)
+{
+	switch (ELF32_R_TYPE(rpnt->r_info))
+	{
+		case R_386_32:
+			*reloc_addr += symbol_addr;
+			break;
+		case R_386_PC32:
+			*reloc_addr += symbol_addr - (unsigned long) reloc_addr;
+			break;
+		case R_386_GLOB_DAT:
+		case R_386_JMP_SLOT:
+			*reloc_addr = symbol_addr;
+			break;
+		case R_386_RELATIVE:
+			*reloc_addr += load_addr;
+			break;
+		default:
+			_dl_exit(1);
+	}
+}
+
+
+/* Transfer control to the user's application, once the dynamic loader is
+ * done.  This routine has to exit the current function, then call the
+ * _dl_elf_main function.  */
+#define START()											\
+	__asm__ volatile ("leave\n\t"						\
+		    "jmp *%%eax\n\t"							\
+		    : "=a" (status) :	"a" (_dl_elf_main))
+
+
+
+