1 /* vi: set sw=4 ts=4: */
3 * Various assmbly language/system dependent hacks that are required
4 * so that we can minimize the amount of platform specific code.
5 * Copyright (C) 2005 by Erik Andersen <andersen@codepoet.org>
8 /* Define this if the system uses RELOCA. */
9 #define ELF_USES_RELOCA
11 /* Initialization sequence for a GOT. */
12 #define INIT_GOT(GOT_BASE,MODULE) \
14 GOT_BASE[2] = (int) _dl_linux_resolve; \
15 GOT_BASE[1] = (int) (MODULE); \
18 /* Here we define the magic numbers that this dynamic loader should accept */
22 /* Used for error messages */
23 #define ELF_TARGET "m68k"
26 extern unsigned int _dl_linux_resolver (struct elf_resolve *, int);
28 /* Define this because we do not want to call .udiv in the library.
29 Not needed for m68k. */
30 #define do_rem(result, n, base) ((result) = (n) % (base))
32 /* 4096 bytes alignment */
33 #define PAGE_ALIGN 0xfffff000
34 #define ADDR_ALIGN 0xfff
35 #define OFFS_ALIGN 0x7ffff000
37 /* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry, so
38 PLT entries should not be allowed to define the value.
39 ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve to one
40 of the main executable's symbols, as for a COPY reloc. */
41 #define elf_machine_type_class(type) \
42 ((((type) == R_68K_JMP_SLOT) * ELF_RTYPE_CLASS_PLT) \
43 | (((type) == R_68K_COPY) * ELF_RTYPE_CLASS_COPY))
45 /* Return the link-time address of _DYNAMIC. Conveniently, this is the
46 first element of the GOT. This must be inlined in a function which
48 static inline Elf32_Addr
49 elf_machine_dynamic (void)
51 register Elf32_Addr *got asm ("%a5");
56 /* Return the run-time load address of the shared object. */
57 static inline Elf32_Addr
58 elf_machine_load_address (void)
61 asm ("lea _dl_start(%%pc), %0\n\t"
62 "sub.l _dl_start@GOT.w(%%a5), %0"
68 elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr,
69 Elf32_Word relative_count)
71 Elf32_Rela * rpnt = (void *)rel_addr;
74 Elf32_Addr *const reloc_addr = (void *) (load_off + (++rpnt)->r_offset);
76 *reloc_addr = load_off + rpnt->r_addend;
77 } while (--relative_count);