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Diffstat (limited to 'ldso/ldso/arm/dl-startup.h')
-rw-r--r--ldso/ldso/arm/dl-startup.h100
1 files changed, 87 insertions, 13 deletions
diff --git a/ldso/ldso/arm/dl-startup.h b/ldso/ldso/arm/dl-startup.h
index 6e3033959..d4a1ee79b 100644
--- a/ldso/ldso/arm/dl-startup.h
+++ b/ldso/ldso/arm/dl-startup.h
@@ -1,21 +1,95 @@
-/* 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. */
+/* vi: set sw=4 ts=4: */
+/*
+ * Architecture specific code used by dl-startup.c
+ * Copyright (C) 2000-2004 by Erik Andersen <andersen@codpoet.org>
+ */
+
/* Overrive the default _dl_boot function, and replace it with a bit of asm.
* Then call the real _dl_boot function, which is now named _dl_boot2. */
-
-asm("" \
-" .text\n" \
+asm("" \
+" .text\n" \
" .globl _dl_boot\n" \
"_dl_boot:\n" \
-" mov r7, sp\n" \
-" @ldr r0, [sp], #4\n" \
-" mov r0, sp\n" \
+" mov r7, sp\n" \
+" @ldr r0, [sp], #4\n" \
+" mov r0, sp\n" \
" bl _dl_boot2\n" \
-" mov r6, r0\n" \
-" mov r0, r7\n" \
-" mov pc, r6\n" \
+" mov r6, r0\n" \
+" mov r0, r7\n" \
+" mov pc, r6\n" \
);
-#define DL_BOOT(X) static void __attribute__ ((unused)) _dl_boot2 (X)
+#define DL_BOOT(X) static __attribute__ ((unused)) void* _dl_boot2 (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_ARM_NONE:
+ break;
+ case R_ARM_ABS32:
+ *reloc_addr += symbol_addr;
+ break;
+ case R_ARM_PC24:
+ {
+ unsigned long addend;
+ long newvalue, topbits;
+
+ addend = *reloc_addr & 0x00ffffff;
+ if (addend & 0x00800000) addend |= 0xff000000;
+
+ newvalue = symbol_addr - (unsigned long)reloc_addr + (addend << 2);
+ topbits = newvalue & 0xfe000000;
+ if (topbits != 0xfe000000 && topbits != 0x00000000)
+ {
+#if 0
+ // Don't bother with this during ldso initilization...
+ newvalue = fix_bad_pc24(reloc_addr, symbol_addr)
+ - (unsigned long)reloc_addr + (addend << 2);
+ topbits = newvalue & 0xfe000000;
+ if (unlikely(topbits != 0xfe000000 && topbits != 0x00000000))
+ {
+ SEND_STDERR("R_ARM_PC24 relocation out of range\n");
+ _dl_exit(1);
+ }
+#else
+ SEND_STDERR("R_ARM_PC24 relocation out of range\n");
+ _dl_exit(1);
+#endif
+ }
+ newvalue >>= 2;
+ symbol_addr = (*reloc_addr & 0xff000000) | (newvalue & 0x00ffffff);
+ *reloc_addr = symbol_addr;
+ break;
+ }
+ case R_ARM_GLOB_DAT:
+ case R_ARM_JUMP_SLOT:
+ *reloc_addr = symbol_addr;
+ break;
+ case R_ARM_RELATIVE:
+ *reloc_addr += load_addr;
+ break;
+ case R_ARM_COPY:
+ break;
+ default:
+ SEND_STDERR("Unsupported relocation type\n");
+ _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() return _dl_elf_main;
+
+