47cc1490e0
This hook is useful for any arch-specific functionality that should be done on loaded objects. For the tile architecture, the hook is already provided (though we switch to using the new macro name with this commit) and implements a simulator notifier so that the simulator can load Elf symbols to match the object and generate better error messages for PC's. Also, remove a spurious definition of DL_UNMAP in dl-runtime.c
78 lines
2.7 KiB
C
78 lines
2.7 KiB
C
/* Copyright (C) 2011 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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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, see
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<http://www.gnu.org/licenses/>. */
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/* Like x86_64, we pass the index of the relocation and not its offset.
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In _dl_profile_fixup and _dl_call_pltexit we also use the index.
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Therefore it is wasteful to compute the offset in the trampoline
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just to reverse the operation immediately afterwards. */
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#define reloc_offset reloc_arg * sizeof (PLTREL)
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#define reloc_index reloc_arg
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#include <elf/dl-runtime.c>
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#include <sys/mman.h>
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#include <arch/sim.h>
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/* Support notifying the simulator about new objects. */
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void internal_function
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_dl_after_load (struct link_map *l)
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{
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int shift;
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#define DLPUTC(c) __insn_mtspr(SPR_SIM_CONTROL, \
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(SIM_CONTROL_DLOPEN \
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| ((c) << _SIM_CONTROL_OPERATOR_BITS)))
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/* Write the library address in hex. */
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DLPUTC ('0');
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DLPUTC ('x');
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for (shift = (int) sizeof (unsigned long) * 8 - 4; shift >= 0; shift -= 4)
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DLPUTC ("0123456789abcdef"[(l->l_map_start >> shift) & 0xF]);
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DLPUTC (':');
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/* Write the library path, including the terminating '\0'. */
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for (size_t i = 0;; i++)
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{
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DLPUTC (l->l_name[i]);
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if (l->l_name[i] == '\0')
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break;
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}
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#undef DLPUTC
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}
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/* Support notifying the simulator about removed objects prior to munmap(). */
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void internal_function
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_dl_unmap (struct link_map *l)
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{
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int shift;
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#define DLPUTC(c) __insn_mtspr(SPR_SIM_CONTROL, \
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(SIM_CONTROL_DLCLOSE \
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| ((c) << _SIM_CONTROL_OPERATOR_BITS)))
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/* Write the library address in hex. */
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DLPUTC ('0');
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DLPUTC ('x');
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for (shift = (int) sizeof (unsigned long) * 8 - 4; shift >= 0; shift -= 4)
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DLPUTC ("0123456789abcdef"[(l->l_map_start >> shift) & 0xF]);
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DLPUTC ('\0');
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#undef DLPUTC
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__munmap ((void *) l->l_map_start, l->l_map_end - l->l_map_start);
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}
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