From 46c91665f4bceba19aed56f5bd6e934c548b84ff Mon Sep 17 00:00:00 2001 From: Sergey Bugaev Date: Sat, 23 Mar 2024 17:35:13 +0300 Subject: [PATCH] libgcc: Add basic support for aarch64-gnu (GNU/Hurd on AArch64) There is currently no unwinding implementation. libgcc/ChangeLog: * config.host: Recognize aarch64*-*-gnu* hosts. * config/aarch64/gnu-unwind.h: New file. * config/aarch64/heap-trampoline.c (allocate_trampoline_page): Support GNU/Hurd. Signed-off-by: Sergey Bugaev --- libgcc/config.host | 9 +++++++ libgcc/config/aarch64/gnu-unwind.h | 36 +++++++++++++++++++++++++ libgcc/config/aarch64/heap-trampoline.c | 4 +-- 3 files changed, 47 insertions(+), 2 deletions(-) create mode 100644 libgcc/config/aarch64/gnu-unwind.h diff --git a/libgcc/config.host b/libgcc/config.host index 59a42d3a01f0..e75a7af647f6 100644 --- a/libgcc/config.host +++ b/libgcc/config.host @@ -448,6 +448,15 @@ aarch64*-*-linux*) tmake_file="${tmake_file} t-dfprules" tmake_file="${tmake_file} ${cpu_type}/t-heap-trampoline" ;; +aarch64*-*-gnu*) + extra_parts="$extra_parts crtfastmath.o" + md_unwind_header=aarch64/gnu-unwind.h + tmake_file="${tmake_file} ${cpu_type}/t-aarch64" + tmake_file="${tmake_file} ${cpu_type}/t-lse t-slibgcc-libgcc" + tmake_file="${tmake_file} ${cpu_type}/t-softfp t-softfp t-crtfm" + tmake_file="${tmake_file} t-dfprules" + tmake_file="${tmake_file} ${cpu_type}/t-heap-trampoline" + ;; aarch64*-*-vxworks7*) extra_parts="$extra_parts crtfastmath.o" md_unwind_header=aarch64/aarch64-unwind.h diff --git a/libgcc/config/aarch64/gnu-unwind.h b/libgcc/config/aarch64/gnu-unwind.h new file mode 100644 index 000000000000..d9e485a18496 --- /dev/null +++ b/libgcc/config/aarch64/gnu-unwind.h @@ -0,0 +1,36 @@ +/* DWARF2 EH unwinding support for GNU Hurd: aarch64. + Copyright (C) 2020-2024 Free Software Foundation, Inc. + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 3, or (at your option) +any later version. + +GCC 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 General Public License for more details. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +. */ + +/* Always include AArch64 unwinder header file. */ +#include "config/aarch64/aarch64-unwind.h" + +#ifndef inhibit_libc + +#include + +/* + * TODO: support for aarch64 needs to be implemented. + */ + +#endif /* ifndef inhibit_libc */ diff --git a/libgcc/config/aarch64/heap-trampoline.c b/libgcc/config/aarch64/heap-trampoline.c index 885df629da71..26957a3eef14 100644 --- a/libgcc/config/aarch64/heap-trampoline.c +++ b/libgcc/config/aarch64/heap-trampoline.c @@ -29,7 +29,7 @@ void *allocate_trampoline_page (void); void __gcc_nested_func_ptr_created (void *chain, void *func, void *dst); void __gcc_nested_func_ptr_deleted (void); -#if defined(__linux__) +#if defined(__linux__) || defined(__gnu_hurd__) static const unsigned char aarch64_trampoline_insns[6][4] = { {0x5f, 0x24, 0x03, 0xd5}, /* hint 34 */ {0xb1, 0x00, 0x00, 0x58}, /* ldr x17, .+20 */ @@ -82,7 +82,7 @@ allocate_trampoline_page (void) { void *page; -#if defined(__linux__) +#if defined(__linux__) || defined(__gnu_hurd__) page = mmap (0, getpagesize (), PROT_WRITE | PROT_EXEC, MAP_ANON | MAP_PRIVATE, 0, 0); #elif __APPLE__