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- /*
- * Various assembly 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] = (unsigned long) _dl_linux_resolve; \
- GOT_BASE[1] = (unsigned long) (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"
- /* Need bootstrap relocations */
- #define ARCH_NEEDS_BOOTSTRAP_RELOCS
- struct elf_resolve;
- extern unsigned long _dl_linux_resolver (struct elf_resolve *, int);
- /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry or
- TLS variable, so undefined references should not be allowed to
- define the value.
- ELF_RTYPE_CLASS_COPY 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 \
- || (type) == R_68K_TLS_DTPMOD32 \
- || (type) == R_68K_TLS_DTPREL32 \
- || (type) == R_68K_TLS_TPREL32) * 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 __always_inline Elf32_Addr
- elf_machine_dynamic (void)
- {
- Elf32_Addr got;
- __asm__ ("move.l _DYNAMIC@GOT.w(%%a5), %0"
- : "=a" (got));
- return got;
- }
- #ifdef __mcoldfire__
- #define PCREL_OP(OP, SRC, DST, TMP, PC) \
- "move.l #" SRC " - ., " TMP "\n\t" OP " (-8, " PC ", " TMP "), " DST
- #else
- #define PCREL_OP(OP, SRC, DST, TMP, PC) \
- OP " " SRC "(" PC "), " DST
- #endif
- /* Return the run-time load address of the shared object. */
- static __always_inline Elf32_Addr
- elf_machine_load_address (void)
- {
- Elf32_Addr addr;
- __asm__ (PCREL_OP ("lea", "_dl_start", "%0", "%0", "%%pc") "\n\t"
- "sub.l _dl_start@GOT.w(%%a5), %0"
- : "=a" (addr));
- return addr;
- }
- static __always_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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