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-startup.h | 102 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 102 insertions(+) create mode 100644 ldso/ldso/microblaze/dl-startup.h (limited to 'ldso/ldso/microblaze/dl-startup.h') diff --git a/ldso/ldso/microblaze/dl-startup.h b/ldso/ldso/microblaze/dl-startup.h new file mode 100644 index 000000000..0d3f3bf15 --- /dev/null +++ b/ldso/ldso/microblaze/dl-startup.h @@ -0,0 +1,102 @@ +/* Startup 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. */ + +__asm__ ("\ + .text\n\ + .globl _start\n\ + .type _start,@function\n\ +_start:\n\ + addk r5,r0,r1\n\ + addk r3,r0,r0\n\ +1:\n\ + addik r5,r5,4\n\ + lw r4,r5,r0\n\ + bneid r4,1b\n\ + addik r3,r3,1\n\ + addik r3,r3,-1\n\ + addk r5,r0,r1\n\ + sw r3,r5,r0\n\ + addik r1,r1,-24\n\ + sw r15,r1,r0\n\ + brlid r15,_dl_start\n\ + nop\n\ + /* FALLTHRU */\n\ +\n\ + .globl _dl_start_user\n\ + .type _dl_start_user,@function\n\ +_dl_start_user:\n\ + mfs r20,rpc\n\ + addik r20,r20,_GLOBAL_OFFSET_TABLE_+8\n\ + lwi r4,r20,_dl_skip_args@GOTOFF\n\ + lwi r5,r1,24\n\ + rsubk r5,r4,r5\n\ + addk r4,r4,r4\n\ + addk r4,r4,r4\n\ + addk r1,r1,r4\n\ + swi r5,r1,24\n\ + swi r3,r1,20\n\ + addk r6,r5,r0\n\ + addk r5,r5,r5\n\ + addk r5,r5,r5\n\ + addik r7,r1,28\n\ + addk r8,r7,r5\n\ + addik r8,r8,4\n\ + lwi r5,r1,24\n\ + lwi r3,r1,20\n\ + addk r4,r5,r5\n\ + addk r4,r4,r4\n\ + addik r6,r1,28\n\ + addk r7,r6,r4\n\ + addik r7,r7,4\n\ + addik r15,r20,_dl_fini@GOTOFF\n\ + addik r15,r15,-8\n\ + brad r3\n\ + addik r1,r1,24\n\ + nop\n\ + .size _dl_start_user, . - _dl_start_user\n\ + .previous"); + +/* + * Get a pointer to the argv array. On many platforms this can be just + * the address of the first argument, on other platforms we need to + * do something a little more subtle here. + */ +#define GET_ARGV(ARGVP, ARGS) ARGVP = (((unsigned long*) ARGS)+1) + +/* The ld.so library requires relocations */ +#define ARCH_NEEDS_BOOTSTRAP_RELOCS + +static __always_inline +void PERFORM_BOOTSTRAP_RELOC(ELF_RELOC *rpnt, unsigned long *reloc_addr, + unsigned long symbol_addr, unsigned long load_addr, attribute_unused Elf32_Sym *symtab) +{ + + switch (ELF32_R_TYPE(rpnt->r_info)) + { + case R_MICROBLAZE_REL: + + *reloc_addr = load_addr + rpnt->r_addend; + break; + + default: + _dl_exit(1); + break; + + } + +} -- cgit v1.2.3