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- /* 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) 2005 by Erik Andersen <andersen@codepoet.org>
- */
- /* Define this if the system uses RELOCA. */
- #define ELF_USES_RELOCA
- #include <elf.h>
- /* Initialization sequence for a GOT. */
- #define INIT_GOT(GOT_BASE,MODULE) \
- do { \
- GOT_BASE[2] = (int) _dl_linux_resolve; \
- GOT_BASE[1] = (int) (MODULE); \
- } while(0)
- /* Here we define the magic numbers that this dynamic loader should accept */
- #define MAGIC1 EM_68K
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "m68k"
- struct elf_resolve;
- extern unsigned int _dl_linux_resolver (struct elf_resolve *, int);
- /* Define this because we do not want to call .udiv in the library.
- Not needed for m68k. */
- #define do_rem(result, n, base) ((result) = (n) % (base))
- /* 4096 bytes alignment */
- #define PAGE_ALIGN 0xfffff000
- #define ADDR_ALIGN 0xfff
- #define OFFS_ALIGN 0x7ffff000
- /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
- PLT entries should not be allowed to define the value.
- ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
- of the main executable's symbols, as for a COPY reloc. */
- #define elf_machine_type_class(type) \
- ((((type) == R_68K_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
- | (((type) == R_68K_COPY) * ELF_RTYPE_CLASS_COPY))
- /* Return the link-time address of _DYNAMIC. Conveniently, this is the
- first element of the GOT. This must be inlined in a function which
- uses global data. */
- static inline Elf32_Addr
- elf_machine_dynamic (void)
- {
- register Elf32_Addr *got asm ("%a5");
- return *got;
- }
- /* Return the run-time load address of the shared object. */
- static inline Elf32_Addr
- elf_machine_load_address (void)
- {
- Elf32_Addr addr;
- asm ("lea _dl_start(%%pc), %0\n\t"
- "sub.l _dl_start@GOT.w(%%a5), %0"
- : "=a" (addr));
- return addr;
- }
- static inline void
- elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
- Elf32_Word relative_count)
- {
- Elf32_Rela * rpnt = (void *)rel_addr;
- --rpnt;
- do {
- Elf32_Addr *const reloc_addr = (void *) (load_off + (++rpnt)->r_offset);
- *reloc_addr = load_off + rpnt->r_addend;
- } while (--relative_count);
- }
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