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Diffstat (limited to 'ports/sysdeps/microblaze/dl-machine.h')
| -rw-r--r-- | ports/sysdeps/microblaze/dl-machine.h | 298 |
1 files changed, 0 insertions, 298 deletions
diff --git a/ports/sysdeps/microblaze/dl-machine.h b/ports/sysdeps/microblaze/dl-machine.h deleted file mode 100644 index 848e822106..0000000000 --- a/ports/sysdeps/microblaze/dl-machine.h +++ /dev/null @@ -1,298 +0,0 @@ -/* Copyright (C) 1995-2014 Free Software Foundation, Inc. - - This file is part of the GNU C Library. - - 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, see - <http://www.gnu.org/licenses/>. */ - -#ifndef dl_machine_h -#define dl_machine_h - -#define ELF_MACHINE_NAME "microblaze" - -#include <sys/param.h> -#include <tls.h> - -/* Return nonzero iff ELF header is compatible with the running host. */ -static inline int -elf_machine_matches_host (const Elf32_Ehdr *ehdr) -{ - return (ehdr->e_machine == EM_MICROBLAZE); -} - -/* 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) -{ - /* This produces a GOTOFF reloc that resolves to zero at link time, so in - fact just loads from the GOT register directly. By doing it without - an asm we can let the compiler choose any register. */ - - 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 (); -} - -/* Set up the loaded object described by L so its unrelocated PLT - entries will jump to the on-demand fixup code in dl-runtime.c. */ - -static inline int __attribute__ ((always_inline)) -elf_machine_runtime_setup (struct link_map *l, int lazy, int profile) -{ - extern void _dl_runtime_resolve (Elf32_Word); - extern void _dl_runtime_profile (Elf32_Word); - - return lazy; -} - -/* The PLT uses Elf32_Rela relocs. */ -#define elf_machine_relplt elf_machine_rela - -/* Mask identifying addresses reserved for the user program, - where the dynamic linker should not map anything. */ -#define ELF_MACHINE_USER_ADDRESS_MASK 0x80000000UL - -/* Initial entry point code for the dynamic linker. - The C function `_dl_start' is the real entry point; - its return value is the user program's entry point. */ - -#define RTLD_START 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,r20,_rtld_local@GOTOFF\n\ - brlid r15,_dl_init_internal\n\ - nop\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"); - -/* 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_NOCOPY iff TYPE should not be allowed to resolve to one - of the main executable's symbols, as for a COPY reloc. */ -#ifndef RTLD_BOOTSTRAP -# define elf_machine_type_class(type) \ - (((type) == R_MICROBLAZE_JUMP_SLOT || \ - (type) == R_MICROBLAZE_TLSDTPREL32 || \ - (type) == R_MICROBLAZE_TLSDTPMOD32 || \ - (type) == R_MICROBLAZE_TLSTPREL32) \ - * ELF_RTYPE_CLASS_PLT \ - | ((type) == R_MICROBLAZE_COPY) * ELF_RTYPE_CLASS_COPY) -#else -# define elf_machine_type_class(type) \ - (((type) == R_MICROBLAZE_JUMP_SLOT) * ELF_RTYPE_CLASS_PLT \ - | ((type) == R_MICROBLAZE_COPY) * ELF_RTYPE_CLASS_COPY) -#endif - -/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ -#define ELF_MACHINE_JMP_SLOT R_MICROBLAZE_JUMP_SLOT - -/* The microblaze never uses Elf32_Rel relocations. */ -#define ELF_MACHINE_NO_REL 1 - -static inline Elf32_Addr -elf_machine_fixup_plt (struct link_map *map, lookup_t t, - const Elf32_Rela *reloc, - Elf32_Addr *reloc_addr, Elf32_Addr value) -{ - return *reloc_addr = value; -} - -/* Return the final value of a plt relocation. Ignore the addend. */ -static inline Elf32_Addr -elf_machine_plt_value (struct link_map *map, const Elf32_Rela *reloc, - Elf32_Addr value) -{ - return value; -} - -#endif /* !dl_machine_h. */ - -/* Names of the architecture-specific auditing callback functions. */ -#define ARCH_LA_PLTENTER microblaze_gnu_pltenter -#define ARCH_LA_PLTEXIT microblaze_gnu_pltexit - -#ifdef RESOLVE_MAP - -/* Perform the relocation specified by RELOC and SYM (which is fully resolved). - MAP is the object containing the reloc. */ - -/* Macro to put 32-bit relocation value into 2 words. */ -#define PUT_REL_64(rel_addr,val) \ - do { \ - ((unsigned short *)(rel_addr))[1] = (val) >> 16; \ - ((unsigned short *)(rel_addr))[3] = (val) & 0xffff; \ - } while (0) - -auto inline void __attribute__ ((always_inline)) -elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc, - const Elf32_Sym *sym, const struct r_found_version *version, - void *const reloc_addr_arg, int skip_ifunc) -{ - Elf32_Addr *const reloc_addr = reloc_addr_arg; - const int r_type = ELF32_R_TYPE (reloc->r_info); - - if (__builtin_expect (r_type == R_MICROBLAZE_64_PCREL, 0)) - PUT_REL_64 (reloc_addr, map->l_addr + reloc->r_addend); - else if (r_type == R_MICROBLAZE_REL) - *reloc_addr = map->l_addr + reloc->r_addend; - else - { - const Elf32_Sym *const refsym = sym; - struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type); - Elf32_Addr value = sym == NULL ? 0 : sym_map->l_addr + sym->st_value; - - value += reloc->r_addend; - if (r_type == R_MICROBLAZE_GLOB_DAT || - r_type == R_MICROBLAZE_JUMP_SLOT || - r_type == R_MICROBLAZE_32) - { - *reloc_addr = value; - } - else if (r_type == R_MICROBLAZE_COPY) - { - if (sym != NULL && (sym->st_size > refsym->st_size - || (sym->st_size < refsym->st_size && GLRO (dl_verbose))) ) - { - const char *strtab; - - strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]); - _dl_error_printf ("\ -%s: Symbol `%s' has different size in shared object, consider re-linking\n", - RTLD_PROGNAME, strtab + refsym->st_name); - } - memcpy (reloc_addr_arg, (void *) value, - MIN (sym->st_size, refsym->st_size)); - } - else if (r_type == R_MICROBLAZE_NONE) - { - } -#if !defined RTLD_BOOTSTRAP - else if (r_type == R_MICROBLAZE_TLSDTPMOD32) - { - if (sym_map != NULL) - *reloc_addr = sym_map->l_tls_modid; - } - else if (r_type == R_MICROBLAZE_TLSDTPREL32) - { - if (sym != NULL) - *reloc_addr = sym->st_value + reloc->r_addend; - } - else if (r_type == R_MICROBLAZE_TLSTPREL32) - { - if (sym != NULL) - { - CHECK_STATIC_TLS (map, sym_map); - *reloc_addr = sym->st_value + sym_map->l_tls_offset + reloc->r_addend; - } - } -#endif - else - { - _dl_reloc_bad_type (map, r_type, 0); - } - } -} - -auto inline void -elf_machine_rela_relative (Elf32_Addr l_addr, const Elf32_Rela *reloc, - void *const reloc_addr_arg) -{ - Elf32_Addr *const reloc_addr = reloc_addr_arg; - PUT_REL_64 (reloc_addr, l_addr + reloc->r_addend); -} - -auto inline void -elf_machine_lazy_rel (struct link_map *map, - Elf32_Addr l_addr, const Elf32_Rela *reloc, - int skip_ifunc) -{ - Elf32_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); - if (ELF32_R_TYPE (reloc->r_info) == R_MICROBLAZE_JUMP_SLOT) - *reloc_addr += l_addr; - else - _dl_reloc_bad_type (map, ELF32_R_TYPE (reloc->r_info), 1); -} - -#endif /* RESOLVE_MAP. */ |