From 331b43717229eaad2a95bf420f5100079bd53683 Mon Sep 17 00:00:00 2001 From: Ryan Flux Date: Tue, 4 Oct 2011 10:50:49 +1000 Subject: microblaze mmu/elf/shared lib support microblaze can either be with mmu or without If with, use elf rather than flat, and support shared libs Signed-off-by: Ryan Flux Signed-off-by: Steve Bennett Signed-off-by: Bernhard Reutner-Fischer --- ldso/ldso/microblaze/dl-sysdep.h | 85 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 ldso/ldso/microblaze/dl-sysdep.h (limited to 'ldso/ldso/microblaze/dl-sysdep.h') diff --git a/ldso/ldso/microblaze/dl-sysdep.h b/ldso/ldso/microblaze/dl-sysdep.h new file mode 100644 index 000000000..1f89673a0 --- /dev/null +++ b/ldso/ldso/microblaze/dl-sysdep.h @@ -0,0 +1,85 @@ +/* elf reloc code for the microblaze 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 + + +/* 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_MICROBLAZE_OLD +#undef MAGIC2 +/* Used for error messages */ +#define ELF_TARGET "microblaze" + +#define elf_machine_type_class(type) \ + (((type) == R_MICROBLAZE_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT \ + | ((type) == R_MICROBLAZE_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) +{ + Elf32_Addr got_entry_0; + __asm__ __volatile__( + "lwi %0,r20,0" + :"=r"(got_entry_0) + ); + return got_entry_0; +} + + +/* 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; + __asm__ __volatile__ ( + "addik %0,r20,_DYNAMIC@GOTOFF" + : "=r"(dyn) + ); + return dyn - elf_machine_dynamic (); +} + + + +static __always_inline void +elf_machine_relative (Elf32_Addr load_off, const Elf32_Addr rel_addr, + Elf32_Word relative_count) +{ + Elf32_Rel * rpnt = (void *) rel_addr; + do { + Elf32_Addr *const reloc_addr = (void *) (load_off + (rpnt)->r_offset); + + *reloc_addr += load_off; + } while (--relative_count); +} -- cgit v1.2.3