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346f18ae18
Update. 2004-06-28 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/alpha/sysdep.h (inline_syscall6): Fix a typo. [BZ #231] * sysdeps/unix/alpha/sysdep.S (__syscall_error): Avoid !samegp relocation in librt.so. [BZ #230] * sysdeps/alpha/dl-machine.h (_dl_start_user): Use ldah/ldl to load _dl_skip_args. Patch by Jakub Bogusz <qboosh@pld-linux.org>.
684 lines
21 KiB
C
684 lines
21 KiB
C
/* Machine-dependent ELF dynamic relocation inline functions. Alpha version.
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Copyright (C) 1996-2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Richard Henderson <rth@tamu.edu>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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/* This was written in the absence of an ABI -- don't expect
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it to remain unchanged. */
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#ifndef dl_machine_h
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#define dl_machine_h 1
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#define ELF_MACHINE_NAME "alpha"
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#include <string.h>
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/* Mask identifying addresses reserved for the user program,
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where the dynamic linker should not map anything. */
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#define ELF_MACHINE_USER_ADDRESS_MASK 0x120000000UL
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/* Return nonzero iff ELF header is compatible with the running host. */
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static inline int
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elf_machine_matches_host (const Elf64_Ehdr *ehdr)
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{
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return ehdr->e_machine == EM_ALPHA;
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}
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/* Return the link-time address of _DYNAMIC. The multiple-got-capable
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linker no longer allocates the first .got entry for this. But not to
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worry, no special tricks are needed. */
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static inline Elf64_Addr
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elf_machine_dynamic (void)
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{
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#ifndef NO_AXP_MULTI_GOT_LD
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return (Elf64_Addr) &_DYNAMIC;
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#else
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register Elf64_Addr *gp __asm__ ("$29");
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return gp[-4096];
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#endif
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}
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/* Return the run-time load address of the shared object. */
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static inline Elf64_Addr
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elf_machine_load_address (void)
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{
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/* NOTE: While it is generally unfriendly to put data in the text
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segment, it is only slightly less so when the "data" is an
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instruction. While we don't have to worry about GLD just yet, an
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optimizing linker might decide that our "data" is an unreachable
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instruction and throw it away -- with the right switches, DEC's
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linker will do this. What ought to happen is we should add
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something to GAS to allow us access to the new GPREL_HI32/LO32
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relocation types stolen from OSF/1 3.0. */
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/* This code relies on the fact that BRADDR relocations do not
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appear in dynamic relocation tables. Not that that would be very
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useful anyway -- br/bsr has a 4MB range and the shared libraries
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are usually many many terabytes away. */
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Elf64_Addr dot;
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long int zero_disp;
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asm("br %0, 1f\n"
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"0:\n\t"
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"br $0, 2f\n"
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"1:\n\t"
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".section\t.data\n"
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"2:\n\t"
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".quad 0b\n\t"
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".previous"
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: "=r"(dot));
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zero_disp = *(int *) dot;
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zero_disp = (zero_disp << 43) >> 41;
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return dot - *(Elf64_Addr *) (dot + 4 + zero_disp);
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}
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/* Set up the loaded object described by L so its unrelocated PLT
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entries will jump to the on-demand fixup code in dl-runtime.c. */
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static inline int
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elf_machine_runtime_setup (struct link_map *l, int lazy, int profile)
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{
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Elf64_Addr plt;
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extern void _dl_runtime_resolve (void);
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extern void _dl_runtime_profile (void);
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if (l->l_info[DT_JMPREL] && lazy)
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{
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/* The GOT entries for the functions in the PLT have not been
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filled in yet. Their initial contents are directed to the
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PLT which arranges for the dynamic linker to be called. */
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plt = D_PTR (l, l_info[DT_PLTGOT]);
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/* This function will be called to perform the relocation. */
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if (!profile)
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*(Elf64_Addr *)(plt + 16) = (Elf64_Addr) &_dl_runtime_resolve;
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else
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{
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*(Elf64_Addr *)(plt + 16) = (Elf64_Addr) &_dl_runtime_profile;
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if (_dl_name_match_p (GLRO(dl_profile), l))
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{
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/* This is the object we are looking for. Say that we really
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want profiling and the timers are started. */
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GL(dl_profile_map) = l;
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}
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}
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/* Identify this shared object */
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*(Elf64_Addr *)(plt + 24) = (Elf64_Addr) l;
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/* If the first instruction of the plt entry is not
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"br $28, plt0", we have to reinitialize .plt for lazy relocation. */
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if (*(unsigned int *)(plt + 32) != 0xc39ffff7)
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{
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unsigned int val = 0xc39ffff7;
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unsigned int *slot, *end;
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const Elf64_Rela *rela = (const Elf64_Rela *)
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D_PTR (l, l_info[DT_JMPREL]);
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Elf64_Addr l_addr = l->l_addr;
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/* br t12,.+4; ldq t12,12(t12); nop; jmp t12,(t12),.+4 */
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*(unsigned long *)plt = 0xa77b000cc3600000;
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*(unsigned long *)(plt + 8) = 0x6b7b000047ff041f;
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slot = (unsigned int *)(plt + 32);
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end = (unsigned int *)(plt + 32
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+ l->l_info[DT_PLTRELSZ]->d_un.d_val / 2);
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while (slot < end)
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{
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/* br at,.plt+0 */
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*slot = val;
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*(Elf64_Addr *) rela->r_offset = (Elf64_Addr) slot - l_addr;
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val -= 3;
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slot += 3;
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++rela;
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}
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}
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}
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return lazy;
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}
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/* This code is used in dl-runtime.c to call the `fixup' function
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and then redirect to the address it returns. */
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#define TRAMPOLINE_TEMPLATE(tramp_name, fixup_name, IMB) \
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extern void tramp_name (void); \
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asm ( "\
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.globl " #tramp_name " \n\
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.ent " #tramp_name " \n\
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" #tramp_name ": \n\
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lda $sp, -44*8($sp) \n\
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.frame $sp, 44*8, $26 \n\
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/* Preserve all integer registers that C normally \n\
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doesn't. */ \n\
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stq $26, 0*8($sp) \n\
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stq $0, 1*8($sp) \n\
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stq $1, 2*8($sp) \n\
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stq $2, 3*8($sp) \n\
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stq $3, 4*8($sp) \n\
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stq $4, 5*8($sp) \n\
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stq $5, 6*8($sp) \n\
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stq $6, 7*8($sp) \n\
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stq $7, 8*8($sp) \n\
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stq $8, 9*8($sp) \n\
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stq $16, 10*8($sp) \n\
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stq $17, 11*8($sp) \n\
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stq $18, 12*8($sp) \n\
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stq $19, 13*8($sp) \n\
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stq $20, 14*8($sp) \n\
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stq $21, 15*8($sp) \n\
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stq $22, 16*8($sp) \n\
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stq $23, 17*8($sp) \n\
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stq $24, 18*8($sp) \n\
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stq $25, 19*8($sp) \n\
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stq $29, 20*8($sp) \n\
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stt $f0, 21*8($sp) \n\
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stt $f1, 22*8($sp) \n\
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stt $f10, 23*8($sp) \n\
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stt $f11, 24*8($sp) \n\
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stt $f12, 25*8($sp) \n\
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stt $f13, 26*8($sp) \n\
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stt $f14, 27*8($sp) \n\
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stt $f15, 28*8($sp) \n\
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stt $f16, 29*8($sp) \n\
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stt $f17, 30*8($sp) \n\
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stt $f18, 31*8($sp) \n\
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stt $f19, 32*8($sp) \n\
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stt $f20, 33*8($sp) \n\
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stt $f21, 34*8($sp) \n\
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stt $f22, 35*8($sp) \n\
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stt $f23, 36*8($sp) \n\
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stt $f24, 37*8($sp) \n\
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stt $f25, 38*8($sp) \n\
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stt $f26, 39*8($sp) \n\
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stt $f27, 40*8($sp) \n\
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stt $f28, 41*8($sp) \n\
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stt $f29, 42*8($sp) \n\
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stt $f30, 43*8($sp) \n\
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.mask 0x27ff01ff, -44*8 \n\
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.fmask 0xfffffc03, -(44-21)*8 \n\
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/* Set up our $gp */ \n\
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br $gp, .+4 \n\
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ldgp $gp, 0($gp) \n\
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.prologue 0 \n\
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/* Set up the arguments for fixup: */ \n\
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/* $16 = link_map out of plt0 */ \n\
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/* $17 = offset of reloc entry = ($28 - $27 - 20) /12 * 24 */\n\
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/* $18 = return address */ \n\
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subq $28, $27, $17 \n\
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ldq $16, 8($27) \n\
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subq $17, 20, $17 \n\
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mov $26, $18 \n\
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addq $17, $17, $17 \n\
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/* Do the fixup */ \n\
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bsr $26, " #fixup_name " !samegp \n\
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/* Move the destination address into position. */ \n\
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mov $0, $27 \n\
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/* Restore program registers. */ \n\
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ldq $26, 0*8($sp) \n\
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ldq $0, 1*8($sp) \n\
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ldq $1, 2*8($sp) \n\
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ldq $2, 3*8($sp) \n\
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ldq $3, 4*8($sp) \n\
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ldq $4, 5*8($sp) \n\
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ldq $5, 6*8($sp) \n\
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ldq $6, 7*8($sp) \n\
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ldq $7, 8*8($sp) \n\
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ldq $8, 9*8($sp) \n\
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ldq $16, 10*8($sp) \n\
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ldq $17, 11*8($sp) \n\
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ldq $18, 12*8($sp) \n\
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ldq $19, 13*8($sp) \n\
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ldq $20, 14*8($sp) \n\
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ldq $21, 15*8($sp) \n\
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ldq $22, 16*8($sp) \n\
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ldq $23, 17*8($sp) \n\
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ldq $24, 18*8($sp) \n\
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ldq $25, 19*8($sp) \n\
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ldq $29, 20*8($sp) \n\
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ldt $f0, 21*8($sp) \n\
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ldt $f1, 22*8($sp) \n\
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ldt $f10, 23*8($sp) \n\
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ldt $f11, 24*8($sp) \n\
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ldt $f12, 25*8($sp) \n\
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ldt $f13, 26*8($sp) \n\
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ldt $f14, 27*8($sp) \n\
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ldt $f15, 28*8($sp) \n\
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ldt $f16, 29*8($sp) \n\
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ldt $f17, 30*8($sp) \n\
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ldt $f18, 31*8($sp) \n\
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ldt $f19, 32*8($sp) \n\
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ldt $f20, 33*8($sp) \n\
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ldt $f21, 34*8($sp) \n\
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ldt $f22, 35*8($sp) \n\
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ldt $f23, 36*8($sp) \n\
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ldt $f24, 37*8($sp) \n\
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ldt $f25, 38*8($sp) \n\
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ldt $f26, 39*8($sp) \n\
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ldt $f27, 40*8($sp) \n\
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ldt $f28, 41*8($sp) \n\
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ldt $f29, 42*8($sp) \n\
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ldt $f30, 43*8($sp) \n\
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/* Flush the Icache after having modified the .plt code. */\n\
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" #IMB " \n\
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/* Clean up and turn control to the destination */ \n\
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lda $sp, 44*8($sp) \n\
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jmp $31, ($27) \n\
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.end " #tramp_name)
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#ifndef PROF
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#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
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TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup, imb); \
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TRAMPOLINE_TEMPLATE (_dl_runtime_profile, profile_fixup, /* nop */);
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#else
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#define ELF_MACHINE_RUNTIME_TRAMPOLINE \
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TRAMPOLINE_TEMPLATE (_dl_runtime_resolve, fixup, imb); \
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strong_alias (_dl_runtime_resolve, _dl_runtime_profile);
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#endif
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/* Initial entry point code for the dynamic linker.
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The C function `_dl_start' is the real entry point;
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its return value is the user program's entry point. */
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#define RTLD_START asm ("\
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.section .text \n\
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.set at \n\
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.globl _start \n\
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.ent _start \n\
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_start: \n\
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.frame $31,0,$31,0 \n\
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br $gp, 0f \n\
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0: ldgp $gp, 0($gp) \n\
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.prologue 0 \n\
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/* Pass pointer to argument block to _dl_start. */ \n\
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mov $sp, $16 \n\
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bsr $26, _dl_start !samegp \n\
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.end _start \n\
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/* FALLTHRU */ \n\
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.globl _dl_start_user \n\
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.ent _dl_start_user \n\
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_dl_start_user: \n\
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.frame $31,0,$31,0 \n\
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.prologue 0 \n\
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/* Save the user entry point address in s0. */ \n\
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mov $0, $9 \n\
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/* See if we were run as a command with the executable \n\
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file name as an extra leading argument. */ \n\
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ldah $1, _dl_skip_args($gp) !gprelhigh \n\
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ldl $1, _dl_skip_args($1) !gprellow \n\
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bne $1, $fixup_stack \n\
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$fixup_stack_ret: \n\
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/* The special initializer gets called with the stack \n\
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just as the application's entry point will see it; \n\
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it can switch stacks if it moves these contents \n\
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over. */ \n\
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" RTLD_START_SPECIAL_INIT " \n\
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/* Call _dl_init(_dl_loaded, argc, argv, envp) to run \n\
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initializers. */ \n\
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ldah $16, _rtld_local($gp) !gprelhigh \n\
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ldq $16, _rtld_local($16) !gprellow \n\
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ldq $17, 0($sp) \n\
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lda $18, 8($sp) \n\
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s8addq $17, 8, $19 \n\
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addq $19, $18, $19 \n\
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bsr $26, _dl_init_internal !samegp \n\
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/* Pass our finalizer function to the user in $0. */ \n\
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ldah $0, _dl_fini($gp) !gprelhigh \n\
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lda $0, _dl_fini($0) !gprellow \n\
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/* Jump to the user's entry point. */ \n\
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mov $9, $27 \n\
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jmp ($9) \n\
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$fixup_stack: \n\
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/* Adjust the stack pointer to skip _dl_skip_args words.\n\
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This involves copying everything down, since the \n\
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stack pointer must always be 16-byte aligned. */ \n\
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ldah $7, _dl_argv_internal($gp) !gprelhigh \n\
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ldq $2, 0($sp) \n\
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ldq $5, _dl_argv_internal($7) !gprellow \n\
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subq $31, $1, $6 \n\
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subq $2, $1, $2 \n\
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s8addq $6, $5, $5 \n\
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mov $sp, $4 \n\
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s8addq $1, $sp, $3 \n\
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stq $2, 0($sp) \n\
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stq $5, _dl_argv_internal($7) !gprellow \n\
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/* Copy down argv. */ \n\
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0: ldq $5, 8($3) \n\
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addq $4, 8, $4 \n\
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addq $3, 8, $3 \n\
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stq $5, 0($4) \n\
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bne $5, 0b \n\
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/* Copy down envp. */ \n\
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1: ldq $5, 8($3) \n\
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addq $4, 8, $4 \n\
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addq $3, 8, $3 \n\
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stq $5, 0($4) \n\
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bne $5, 1b \n\
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/* Copy down auxiliary table. */ \n\
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2: ldq $5, 8($3) \n\
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ldq $6, 16($3) \n\
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addq $4, 16, $4 \n\
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addq $3, 16, $3 \n\
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stq $5, -8($4) \n\
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stq $6, 0($4) \n\
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bne $5, 2b \n\
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br $fixup_stack_ret \n\
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.end _dl_start_user \n\
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.set noat \n\
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.previous");
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#ifndef RTLD_START_SPECIAL_INIT
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#define RTLD_START_SPECIAL_INIT /* nothing */
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#endif
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/* ELF_RTYPE_CLASS_PLT iff TYPE describes relocation of a PLT entry
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or TLS variables, so undefined references should not be allowed
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to define the value.
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ELF_RTYPE_CLASS_NOCOPY iff TYPE should not be allowed to resolve
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to one of the main executable's symbols, as for a COPY reloc.
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This is unused on Alpha. */
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#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD)
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#define elf_machine_type_class(type) \
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(((type) == R_ALPHA_JMP_SLOT \
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|| (type) == R_ALPHA_DTPMOD64 \
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|| (type) == R_ALPHA_DTPREL64 \
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|| (type) == R_ALPHA_TPREL64) * ELF_RTYPE_CLASS_PLT)
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#else
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#define elf_machine_type_class(type) \
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(((type) == R_ALPHA_JMP_SLOT) * ELF_RTYPE_CLASS_PLT)
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#endif
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/* A reloc type used for ld.so cmdline arg lookups to reject PLT entries. */
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#define ELF_MACHINE_JMP_SLOT R_ALPHA_JMP_SLOT
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/* The alpha never uses Elf64_Rel relocations. */
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#define ELF_MACHINE_NO_REL 1
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/* Fix up the instructions of a PLT entry to invoke the function
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rather than the dynamic linker. */
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static inline Elf64_Addr
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elf_machine_fixup_plt (struct link_map *l, lookup_t t,
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const Elf64_Rela *reloc,
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Elf64_Addr *got_addr, Elf64_Addr value)
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{
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const Elf64_Rela *rela_plt;
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Elf64_Word *plte;
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long int edisp;
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/* Store the value we are going to load. */
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*got_addr = value;
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/* Recover the PLT entry address by calculating reloc's index into the
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.rela.plt, and finding that entry in the .plt. */
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rela_plt = (void *) D_PTR (l, l_info[DT_JMPREL]);
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plte = (void *) (D_PTR (l, l_info[DT_PLTGOT]) + 32);
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plte += 3 * (reloc - rela_plt);
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/* Find the displacement from the plt entry to the function. */
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edisp = (long int) (value - (Elf64_Addr)&plte[3]) / 4;
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if (edisp >= -0x100000 && edisp < 0x100000)
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{
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/* If we are in range, use br to perfect branch prediction and
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elide the dependency on the address load. This case happens,
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e.g., when a shared library call is resolved to the same library. */
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int hi, lo;
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hi = value - (Elf64_Addr)&plte[0];
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lo = (short int) hi;
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hi = (hi - lo) >> 16;
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/* Emit "lda $27,lo($27)" */
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plte[1] = 0x237b0000 | (lo & 0xffff);
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/* Emit "br $31,function" */
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plte[2] = 0xc3e00000 | (edisp & 0x1fffff);
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/* Think about thread-safety -- the previous instructions must be
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committed to memory before the first is overwritten. */
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__asm__ __volatile__("wmb" : : : "memory");
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/* Emit "ldah $27,hi($27)" */
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plte[0] = 0x277b0000 | (hi & 0xffff);
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}
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else
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{
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/* Don't bother with the hint since we already know the hint is
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wrong. Eliding it prevents the wrong page from getting pulled
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into the cache. */
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int hi, lo;
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hi = (Elf64_Addr)got_addr - (Elf64_Addr)&plte[0];
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lo = (short)hi;
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hi = (hi - lo) >> 16;
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/* Emit "ldq $27,lo($27)" */
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plte[1] = 0xa77b0000 | (lo & 0xffff);
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/* Emit "jmp $31,($27)" */
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plte[2] = 0x6bfb0000;
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/* Think about thread-safety -- the previous instructions must be
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committed to memory before the first is overwritten. */
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__asm__ __volatile__("wmb" : : : "memory");
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/* Emit "ldah $27,hi($27)" */
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plte[0] = 0x277b0000 | (hi & 0xffff);
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}
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/* At this point, if we've been doing runtime resolution, Icache is dirty.
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This will be taken care of in _dl_runtime_resolve. If instead we are
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doing this as part of non-lazy startup relocation, that bit of code
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hasn't made it into Icache yet, so there's nothing to clean up. */
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return value;
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}
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/* Return the final value of a plt relocation. */
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static inline Elf64_Addr
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elf_machine_plt_value (struct link_map *map, const Elf64_Rela *reloc,
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Elf64_Addr value)
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{
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return value + reloc->r_addend;
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}
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#endif /* !dl_machine_h */
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#ifdef RESOLVE
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/* Perform the relocation specified by RELOC and SYM (which is fully resolved).
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MAP is the object containing the reloc. */
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static inline void
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elf_machine_rela (struct link_map *map,
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const Elf64_Rela *reloc,
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const Elf64_Sym *sym,
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const struct r_found_version *version,
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void *const reloc_addr_arg)
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{
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Elf64_Addr *const reloc_addr = reloc_addr_arg;
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unsigned long int const r_type = ELF64_R_TYPE (reloc->r_info);
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#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC && !defined SHARED
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/* This is defined in rtld.c, but nowhere in the static libc.a; make the
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reference weak so static programs can still link. This declaration
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cannot be done when compiling rtld.c (i.e. #ifdef RTLD_BOOTSTRAP)
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because rtld.c contains the common defn for _dl_rtld_map, which is
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incompatible with a weak decl in the same file. */
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weak_extern (_dl_rtld_map);
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#endif
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/* We cannot use a switch here because we cannot locate the switch
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jump table until we've self-relocated. */
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#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
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if (__builtin_expect (r_type == R_ALPHA_RELATIVE, 0))
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{
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# if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
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/* Already done in dynamic linker. */
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if (map != &GL(dl_rtld_map))
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# endif
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{
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/* XXX Make some timings. Maybe it's preferable to test for
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unaligned access and only do it the complex way if necessary. */
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Elf64_Addr reloc_addr_val;
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/* Load value without causing unaligned trap. */
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memcpy (&reloc_addr_val, reloc_addr_arg, 8);
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reloc_addr_val += map->l_addr;
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/* Store value without causing unaligned trap. */
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memcpy (reloc_addr_arg, &reloc_addr_val, 8);
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}
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}
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else
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#endif
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if (__builtin_expect (r_type == R_ALPHA_NONE, 0))
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return;
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else
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{
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Elf64_Addr sym_value;
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Elf64_Addr sym_raw_value;
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#if defined USE_TLS && !defined RTLD_BOOTSTRAP
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struct link_map *sym_map = RESOLVE_MAP (&sym, version, r_type);
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sym_raw_value = sym_value = reloc->r_addend;
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if (sym)
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{
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sym_raw_value += sym->st_value;
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sym_value = sym_raw_value + sym_map->l_addr;
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}
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#else
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Elf64_Addr loadbase = RESOLVE (&sym, version, r_type);
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sym_raw_value = sym_value = reloc->r_addend;
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if (sym)
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{
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sym_raw_value += sym->st_value;
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sym_value = sym_raw_value + loadbase;
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}
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#endif
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if (r_type == R_ALPHA_GLOB_DAT)
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*reloc_addr = sym_value;
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#ifdef RESOLVE_CONFLICT_FIND_MAP
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/* In .gnu.conflict section, R_ALPHA_JMP_SLOT relocations have
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R_ALPHA_JMP_SLOT in lower 8 bits and the remaining 24 bits
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are .rela.plt index. */
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else if ((r_type & 0xff) == R_ALPHA_JMP_SLOT)
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{
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/* elf_machine_fixup_plt needs the map reloc_addr points into,
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while in _dl_resolve_conflicts map is _dl_loaded. */
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RESOLVE_CONFLICT_FIND_MAP (map, reloc_addr);
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reloc = ((const Elf64_Rela *) D_PTR (map, l_info[DT_JMPREL]))
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+ (r_type >> 8);
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elf_machine_fixup_plt (map, 0, reloc, reloc_addr, sym_value);
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}
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#else
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else if (r_type == R_ALPHA_JMP_SLOT)
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elf_machine_fixup_plt (map, 0, reloc, reloc_addr, sym_value);
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#endif
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#ifndef RTLD_BOOTSTRAP
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else if (r_type == R_ALPHA_REFQUAD)
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{
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/* Store value without causing unaligned trap. */
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memcpy (reloc_addr_arg, &sym_value, 8);
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}
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#endif
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#if defined USE_TLS && (!defined RTLD_BOOTSTRAP || USE___THREAD)
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else if (r_type == R_ALPHA_DTPMOD64)
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{
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#ifdef RTLD_BOOTSTRAP
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/* During startup the dynamic linker is always index 1. */
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*reloc_addr = 1;
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#else
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/* Get the information from the link map returned by the
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resolv function. */
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if (sym_map != NULL)
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*reloc_addr = sym_map->l_tls_modid;
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#endif
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}
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else if (r_type == R_ALPHA_DTPREL64)
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{
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#ifndef RTLD_BOOTSTRAP
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/* During relocation all TLS symbols are defined and used.
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Therefore the offset is already correct. */
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*reloc_addr = sym_raw_value;
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#endif
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}
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else if (r_type == R_ALPHA_TPREL64)
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{
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#ifdef RTLD_BOOTSTRAP
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*reloc_addr = sym_raw_value + map->l_tls_offset;
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#else
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if (sym_map)
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{
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CHECK_STATIC_TLS (map, sym_map);
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*reloc_addr = sym_raw_value + sym_map->l_tls_offset;
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}
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#endif
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}
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#endif /* USE_TLS */
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else
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_dl_reloc_bad_type (map, r_type, 0);
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}
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}
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/* Let do-rel.h know that on Alpha if l_addr is 0, all RELATIVE relocs
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|
can be skipped. */
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|
#define ELF_MACHINE_REL_RELATIVE 1
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|
|
static inline void
|
|
elf_machine_rela_relative (Elf64_Addr l_addr, const Elf64_Rela *reloc,
|
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void *const reloc_addr_arg)
|
|
{
|
|
/* XXX Make some timings. Maybe it's preferable to test for
|
|
unaligned access and only do it the complex way if necessary. */
|
|
Elf64_Addr reloc_addr_val;
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/* Load value without causing unaligned trap. */
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memcpy (&reloc_addr_val, reloc_addr_arg, 8);
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reloc_addr_val += l_addr;
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/* Store value without causing unaligned trap. */
|
|
memcpy (reloc_addr_arg, &reloc_addr_val, 8);
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}
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|
|
static inline void
|
|
elf_machine_lazy_rel (struct link_map *map,
|
|
Elf64_Addr l_addr, const Elf64_Rela *reloc)
|
|
{
|
|
Elf64_Addr * const reloc_addr = (void *)(l_addr + reloc->r_offset);
|
|
unsigned long int const r_type = ELF64_R_TYPE (reloc->r_info);
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|
|
if (r_type == R_ALPHA_JMP_SLOT)
|
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{
|
|
/* Perform a RELATIVE reloc on the .got entry that transfers
|
|
to the .plt. */
|
|
*reloc_addr += l_addr;
|
|
}
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else if (r_type == R_ALPHA_NONE)
|
|
return;
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else
|
|
_dl_reloc_bad_type (map, r_type, 1);
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|
}
|
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|
#endif /* RESOLVE */
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