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Diffstat (limited to 'sysdeps/ia64/dl-machine.h')
| -rw-r--r-- | sysdeps/ia64/dl-machine.h | 460 |
1 files changed, 0 insertions, 460 deletions
diff --git a/sysdeps/ia64/dl-machine.h b/sysdeps/ia64/dl-machine.h deleted file mode 100644 index 2905574c31..0000000000 --- a/sysdeps/ia64/dl-machine.h +++ /dev/null @@ -1,460 +0,0 @@ -/* Machine-dependent ELF dynamic relocation inline functions. IA-64 version. - Copyright (C) 1995-2024 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 - <https://www.gnu.org/licenses/>. */ - -#ifndef dl_machine_h -#define dl_machine_h 1 - -#define ELF_MACHINE_NAME "ia64" - -#include <assert.h> -#include <string.h> -#include <link.h> -#include <errno.h> -#include <dl-fptr.h> -#include <tls.h> -#include <dl-static-tls.h> -#include <dl-machine-rel.h> - -/* Translate a processor specific dynamic tag to the index - in l_info array. */ -#define DT_IA_64(x) (DT_IA_64_##x - DT_LOPROC + DT_NUM) - -static inline void __attribute__ ((always_inline)) -__ia64_init_bootstrap_fdesc_table (struct link_map *map) -{ - Elf64_Addr *boot_table; - - /* careful: this will be called before got has been relocated... */ - asm (";; addl %0 = @gprel (_dl_boot_fptr_table), gp" : "=r"(boot_table)); - - map->l_mach.fptr_table_len = ELF_MACHINE_BOOT_FPTR_TABLE_LEN; - map->l_mach.fptr_table = boot_table; -} - -#define ELF_MACHINE_BEFORE_RTLD_RELOC(map, dynamic_info) \ - __ia64_init_bootstrap_fdesc_table (map); - -/* Return nonzero iff ELF header is compatible with the running host. */ -static inline int __attribute__ ((unused)) -elf_machine_matches_host (const Elf64_Ehdr *ehdr) -{ - return ehdr->e_machine == EM_IA_64; -} - - -/* Return the link-time address of _DYNAMIC. */ -static inline Elf64_Addr __attribute__ ((unused, const)) -elf_machine_dynamic (void) -{ - Elf64_Addr *p; - - __asm__ ( - ".section .sdata\n" - " .type __dynamic_ltv#, @object\n" - " .size __dynamic_ltv#, 8\n" - "__dynamic_ltv:\n" - " data8 @ltv(_DYNAMIC#)\n" - ".previous\n" - " addl %0 = @gprel(__dynamic_ltv#), gp ;;" - : "=r" (p)); - - return *p; -} - - -/* Return the run-time load address of the shared object. */ -static inline Elf64_Addr __attribute__ ((unused)) -elf_machine_load_address (void) -{ - Elf64_Addr ip; - int *p; - - __asm__ ( - "1: mov %0 = ip\n" - ".section .sdata\n" - "2: data4 @ltv(1b)\n" - " .align 8\n" - ".previous\n" - " addl %1 = @gprel(2b), gp ;;" - : "=r" (ip), "=r" (p)); - - return ip - (Elf64_Addr) *p; -} - -/* 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__ ((unused, always_inline)) -elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[], - int lazy, int profile) -{ - extern void _dl_runtime_resolve (void); - extern void _dl_runtime_profile (void); - - if (lazy) - { - register Elf64_Addr gp __asm__ ("gp"); - Elf64_Addr *reserve, doit; - - /* - * Careful with the typecast here or it will try to add l-l_addr - * pointer elements - */ - reserve = ((Elf64_Addr *) - (l->l_info[DT_IA_64 (PLT_RESERVE)]->d_un.d_ptr + l->l_addr)); - /* Identify this shared object. */ - reserve[0] = (Elf64_Addr) l; - - /* This function will be called to perform the relocation. */ -#ifdef SHARED - if (__glibc_unlikely (profile)) - { - if (GLRO(dl_profile) != NULL - && _dl_name_match_p (GLRO(dl_profile), l)) - { - /* This is the object we are looking for. Say that we really - want profiling and the timers are started. */ - GL(dl_profile_map) = l; - } - doit = (Elf64_Addr) ELF_PTR_TO_FDESC (&_dl_runtime_profile)->ip; - } - else -#endif - { - doit = (Elf64_Addr) ELF_PTR_TO_FDESC (&_dl_runtime_resolve)->ip; - } - - reserve[1] = doit; - reserve[2] = gp; - } - - return lazy; -} - -/* Names of the architecture-specific auditing callback functions. */ -#define ARCH_LA_PLTENTER ia64_gnu_pltenter -#define ARCH_LA_PLTEXIT ia64_gnu_pltexit - -/* Undo the adds out0 = 16, sp below to get at the value we want in - __libc_stack_end. */ -#define DL_STACK_END(cookie) \ - ((void *) (((long) (cookie)) - 16)) - -/* 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" \ -" .global _start#\n" \ -" .proc _start#\n" \ -"_start:\n" \ -"0: { .mii\n" \ -" .prologue\n" \ -" .save rp, r0\n" \ -" .body\n" \ -" .prologue\n" \ -" .save ar.pfs, r32\n" \ -" alloc loc0 = ar.pfs, 0, 3, 4, 0\n" \ -" .body\n" \ -" mov r2 = ip\n" \ -" addl r3 = @gprel(0b), r0\n" \ -" ;;\n" \ -" }\n" \ -" { .mlx\n" \ -" /* Calculate the GP, and save a copy in loc1. */\n" \ -" sub gp = r2, r3\n" \ -" movl r8 = 0x9804c0270033f\n" \ -" ;;\n" \ -" }\n" \ -" { .mii\n" \ -" mov ar.fpsr = r8\n" \ -" sub loc1 = r2, r3\n" \ -" /* _dl_start wants a pointer to the pointer to the arg block and\n" \ -" the arg block starts with an integer, thus the magic 16. */\n" \ -" adds out0 = 16, sp\n" \ -" }\n" \ -" { .bbb\n" \ -" br.call.sptk.many b0 = _dl_start#\n" \ -" ;;\n" \ -" }\n" \ -" .endp _start#\n" \ -" /* FALLTHRU */\n" \ -" .global _dl_start_user#\n" \ -" .proc _dl_start_user#\n" \ -"_dl_start_user:\n" \ -" .prologue\n" \ -" .save rp, r0\n" \ -" .body\n" \ -" .prologue\n" \ -" .save ar.pfs, r32\n" \ -" .body\n" \ -" { .mii\n" \ -" /* Save the pointer to the user entry point fptr in loc2. */\n" \ -" mov loc2 = ret0\n" \ -" addl r2 = @ltoff(_dl_argc), gp\n" \ -" ;;\n" \ -" }\n" \ -" { .mii\n" \ -" ld8 out1 = [r2] /* Get the _dl_argc address. */\n" \ -" addl r3 = @ltoff(_dl_argv), gp\n" \ -" ;;\n" \ -" }\n" \ -" { .mmi\n" \ -" ld8 out2 = [r3] /* Get the _dl_argv address. */\n" \ -" ld8 out1 = [out1] /* Get the adjusted _dl_argc. */\n" \ -" addl r2 = @gprel(_rtld_local), gp\n" \ -" ;;\n" \ -" }\n" \ -" { .mmi\n" \ -" sxt4 out3 = out1 /* envp = argv + argc + 1 */\n" \ -" ;;\n" \ -" }\n" \ -" { .mmi\n" \ -" adds out3 = 1, out3\n" \ -" ;;\n" \ -" }\n" \ -" { .mmi\n" \ -" ld8 out2 = [out2] /* Get the adjusted _dl_argv. */\n" \ -" shladd out3 = out3, 3, r0\n" \ -" ;;\n" \ -" }\n" \ -" { .mmb\n" \ -" add out3 = out3, out2\n" \ -" ld8 out0 = [r2] /* Get the linkmap. */\n" \ -" br.call.sptk.many b0 = _dl_init#\n" \ -" }\n" \ -" /* Pass our finalizer function to the user,\n" \ -" and jump to the user's entry point. */\n" \ -" { .mmi\n" \ -" ld8 r3 = [loc2], 8\n" \ -" mov b0 = r0\n" \ -" }\n" \ -" { .mmi\n" \ -" addl ret0 = @ltoff(@fptr(_dl_fini#)), gp\n" \ -" ;;\n" \ -" mov b6 = r3\n" \ -" }\n" \ -" { .mmi\n" \ -" ld8 ret0 = [ret0]\n" \ -" ld8 gp = [loc2]\n" \ -" mov ar.pfs = loc0\n" \ -" ;;\n" \ -" }\n" \ -" { .mfb\n" \ -" br.sptk.many b6\n" \ -" ;;\n" \ -" }\n" \ -" .endp _dl_start_user#\n" \ -".previous\n"); - - -#ifndef RTLD_START_SPECIAL_INIT -#define RTLD_START_SPECIAL_INIT /* nothing */ -#endif - -/* 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_COPY iff TYPE should not be allowed to resolve to one - of the main executable's symbols, as for a COPY reloc, which we don't - use. */ -/* ??? Ignore *MSB for now. */ -#define elf_machine_type_class(type) \ - (((type) == R_IA64_IPLTLSB || (type) == R_IA64_DTPMOD64LSB \ - || (type) == R_IA64_DTPREL64LSB || (type) == R_IA64_TPREL64LSB) \ - * ELF_RTYPE_CLASS_PLT) - -/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */ -#define ELF_MACHINE_JMP_SLOT R_IA64_IPLTLSB - -/* Return the address of the entry point. */ -#define ELF_MACHINE_START_ADDRESS(map, start) \ -({ \ - ElfW(Addr) addr; \ - DL_DT_FUNCTION_ADDRESS(map, start, static, addr) \ - addr; \ -}) - -/* Fixup a PLT entry to bounce directly to the function at VALUE. */ -static inline struct fdesc __attribute__ ((always_inline)) -elf_machine_fixup_plt (struct link_map *l, lookup_t t, - const ElfW(Sym) *refsym, const ElfW(Sym) *sym, - const Elf64_Rela *reloc, - Elf64_Addr *reloc_addr, struct fdesc value) -{ - /* l is the link_map for the caller, t is the link_map for the object - * being called */ - /* got has already been relocated in elf_get_dynamic_info() */ - reloc_addr[1] = value.gp; - /* we need a "release" here to ensure that the gp is visible before - the code entry point is updated: */ - ((volatile Elf64_Addr *) reloc_addr)[0] = value.ip; - return value; -} - -/* Return the final value of a plt relocation. */ -static inline struct fdesc -elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc, - struct fdesc value) -{ - /* No need to handle rel vs rela since IA64 is rela only */ - return (struct fdesc) { value.ip + reloc->r_addend, value.gp }; -} - -#endif /* !dl_machine_h */ - -#ifdef RESOLVE_MAP - -#define R_IA64_TYPE(R) ((R) & -8) -#define R_IA64_FORMAT(R) ((R) & 7) - -#define R_IA64_FORMAT_32MSB 4 -#define R_IA64_FORMAT_32LSB 5 -#define R_IA64_FORMAT_64MSB 6 -#define R_IA64_FORMAT_64LSB 7 - - -/* Perform the relocation specified by RELOC and SYM (which is fully - resolved). MAP is the object containing the reloc. */ -static inline void -__attribute ((always_inline)) -elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[], - const Elf64_Rela *reloc, - const Elf64_Sym *sym, - const struct r_found_version *version, - void *const reloc_addr_arg, - int skip_ifunc) -{ - Elf64_Addr *const reloc_addr = reloc_addr_arg; - const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info); - Elf64_Addr value; - - /* We cannot use a switch here because we cannot locate the switch - jump table until we've self-relocated. */ - -#if !defined RTLD_BOOTSTRAP - if (__builtin_expect (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_REL64LSB), - 0)) - { - assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB); - value = *reloc_addr + map->l_addr; - } - else -#endif - if (__builtin_expect (r_type == R_IA64_NONE, 0)) - return; - else - { - struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, - r_type); - - /* RESOLVE_MAP() will return NULL if it fail to locate the symbol. */ - if (sym_map != NULL) - { - value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend; - - if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DIR64LSB)) - ;/* No adjustment. */ - else if (r_type == R_IA64_IPLTLSB) - { - elf_machine_fixup_plt (NULL, NULL, NULL, NULL, reloc, reloc_addr, - DL_FIXUP_MAKE_VALUE (sym_map, value)); - return; - } - else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_FPTR64LSB)) - value = _dl_make_fptr (sym_map, sym, value); - else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_PCREL64LSB)) - value -= (Elf64_Addr) reloc_addr & -16; - else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DTPMOD64LSB)) -#ifdef RTLD_BOOTSTRAP - /* During startup the dynamic linker is always index 1. */ - value = 1; -#else - /* Get the information from the link map returned by the - resolv function. */ - value = sym_map->l_tls_modid; - else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_DTPREL64LSB)) - value -= sym_map->l_addr; -#endif - else if (R_IA64_TYPE (r_type) == R_IA64_TYPE (R_IA64_TPREL64LSB)) - { -#ifndef RTLD_BOOTSTRAP - CHECK_STATIC_TLS (map, sym_map); -#endif - value += sym_map->l_tls_offset - sym_map->l_addr; - } - else - _dl_reloc_bad_type (map, r_type, 0); - } - else - value = 0; - } - - /* ??? Ignore MSB and Instruction format for now. */ - if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_64LSB) - *reloc_addr = value; - else if (R_IA64_FORMAT (r_type) == R_IA64_FORMAT_32LSB) - *(int *) reloc_addr = value; - else if (r_type == R_IA64_IPLTLSB) - { - reloc_addr[0] = 0; - reloc_addr[1] = 0; - } - else - _dl_reloc_bad_type (map, r_type, 0); -} - -/* Let do-rel.h know that on IA-64 if l_addr is 0, all RELATIVE relocs - can be skipped. */ -#define ELF_MACHINE_REL_RELATIVE 1 - -static inline void -__attribute ((always_inline)) -elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc, - void *const reloc_addr_arg) -{ - Elf64_Addr *const reloc_addr = reloc_addr_arg; - /* ??? Ignore MSB and Instruction format for now. */ - assert (ELF64_R_TYPE (reloc->r_info) == R_IA64_REL64LSB); - - *reloc_addr += l_addr; -} - -/* Perform a RELATIVE reloc on the .got entry that transfers to the .plt. */ -static inline void -__attribute ((always_inline)) -elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[], - Elf64_Addr l_addr, const Elf64_Rela *reloc, - int skip_ifunc) -{ - Elf64_Addr *const reloc_addr = (void *) (l_addr + reloc->r_offset); - const unsigned long int r_type = ELF64_R_TYPE (reloc->r_info); - - if (r_type == R_IA64_IPLTLSB) - { - reloc_addr[0] += l_addr; - reloc_addr[1] += l_addr; - } - else if (r_type == R_IA64_NONE) - return; - else - _dl_reloc_bad_type (map, r_type, 1); -} - -#endif /* RESOLVE_MAP */ |