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ba00d787f3
Now that the signal code no longer accesses it, the only real user of it was mig-reply.c, so move the logic for managing the port there. If we're in SHARED and outside of rtld, we know that __LIBC_NO_TLS () always evaluates to 0, and a TLS reply port will always be used, not __hurd_reply_port0. Still, the compiler does not see that __hurd_reply_port0 is never used due to its address being taken. To deal with this, explicitly compile out __hurd_reply_port0 when we know we won't use it. Also, instead of accessing the port via THREAD_SELF->reply_port, this uses THREAD_GETMEM and THREAD_SETMEM directly, avoiding possible miscompilations. Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
80 lines
2.6 KiB
C++
80 lines
2.6 KiB
C++
/* Copyright (C) 1994-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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<https://www.gnu.org/licenses/>. */
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#ifdef __ASSEMBLER__
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/* Get the Mach definitions of ENTRY and kernel_trap. */
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#include <mach/machine/syscall_sw.h>
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/* The Mach definitions assume underscores should be prepended to
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symbol names. Redefine them to do so only when appropriate. */
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#undef EXT
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#undef LEXT
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#define EXT(x) C_SYMBOL_NAME(x)
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#define LEXT(x) C_SYMBOL_NAME(x##:)
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/* For ELF we need to add the `.type' directive to make shared libraries
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work right. */
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#undef ENTRY
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#undef ENTRY2
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#define ENTRY(name) \
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.globl name; \
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.align ALIGN; \
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.type name,@function; \
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name:
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#endif
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/* This is invoked by things run when there is random lossage, before they
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try to do anything else. Just to be safe, deallocate the reply port so
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bogons arriving on it don't foul up future RPCs. */
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#ifndef __ASSEMBLER__
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#define FATAL_PREPARE_INCLUDE <mach/mig_support.h>
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#define FATAL_PREPARE __mig_dealloc_reply_port (__mig_get_reply_port ())
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#endif
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/* sysdeps/mach/MACHINE/sysdep.h should define the following macros. */
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/* Produce a text assembler label for the C global symbol NAME. */
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#ifndef ENTRY
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#define ENTRY(name) .error ENTRY not defined by sysdeps/mach/MACHINE/sysdep.h
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/* This is not used on all machines. */
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#endif
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/* Set variables ARGC, ARGV, and ENVP for the arguments
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left on the stack by the microkernel. */
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#ifndef SNARF_ARGS
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#define SNARF_ARGS(argc, argv, envp)
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#error SNARF_ARGS not defined by sysdeps/mach/MACHINE/sysdep.h
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#endif
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/* LOSE can be defined as the `halt' instruction or something
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similar which will cause the process to die in a characteristic
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way suggesting a bug. */
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#ifndef LOSE
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#define LOSE ({ volatile int zero = 0; zero / zero; })
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#endif
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/* One of these should be defined to specify the stack direction. */
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#if !defined (STACK_GROWTH_UP) && !defined (STACK_GROWTH_DOWN)
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#error stack direction unspecified
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#endif
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/* Used by some assembly code. */
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#define C_SYMBOL_NAME(name) name
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