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- /* elf reloc code for the or1k platform, based on glibc 2.3.6, dl-machine.h */
- /*
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- /* Use reloca */
- #define ELF_USES_RELOCA
- #include <elf.h>
- /* Initialise the 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_OR1K
- #undef MAGIC2
- /* Used for error messages */
- #define ELF_TARGET "or1k"
- #define elf_machine_type_class(type) \
- (((type) == R_OR1K_JMP_SLOT) * ELF_RTYPE_CLASS_PLT \
- | ((type) == R_OR1K_COPY) * ELF_RTYPE_CLASS_COPY)
- static inline Elf32_Addr *
- or1k_get_got (void)
- {
- Elf32_Addr *got;
- Elf32_Addr linkreg;
- __asm__("l.ori %0, r9, 0\n"
- "l.jal .LPC1\n"
- #ifndef __OR1K_NODELAY__
- "l.nop\n"
- #endif
- ".LPC1:\n"
- "l.movhi %1, gotpchi(_GLOBAL_OFFSET_TABLE_+(.-.LPC1))\n"
- "l.ori %1, %1, gotpclo(_GLOBAL_OFFSET_TABLE_+(.-.LPC1))\n"
- "l.add %1, %1, r9\n"
- "l.ori r9, %0, 0\n"
- : "=r" (linkreg), "=r" (got));
- return got;
- }
- /* Return the link-time address of _DYNAMIC. Conveniently, this is the
- first element of the GOT. */
- static inline Elf32_Addr
- elf_machine_dynamic (void)
- {
- Elf32_Addr *got = or1k_get_got();
- return *got;
- }
- /* Return the run-time load address of the shared object. */
- static inline Elf32_Addr
- elf_machine_load_address (void)
- {
- /* Compute the difference between the runtime address of _DYNAMIC as seen
- by a GOTOFF reference, and the link-time address found in the special
- unrelocated first GOT entry. */
- Elf32_Addr dyn;
- Elf32_Addr *got = or1k_get_got();
- __asm__ __volatile__ (
- "l.movhi %0, gotoffhi(_DYNAMIC);"
- "l.ori %0, %0, gotofflo(_DYNAMIC);"
- "l.add %0, %0, %1;"
- : "=r"(dyn), "=r"(got)
- );
- return dyn - *got;
- }
- 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;
- } while (--relative_count);
- }
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