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/* vi: set sw=4 ts=4: */
/*
* Architecture specific code used by dl-startup.c
* Copyright (C) 2000-2004 by Erik Andersen <andersen@codepoet.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" \
" .globl _dl_boot\n" \
"_dl_boot:\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" \
);
#define DL_BOOT(X) static __attribute_used__ 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;
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