From: Vineet Gupta <vineet.gupta1@synopsys.com>
To: <libc-alpha@sourceware.org>
Cc: <linux-snps-arc@lists.infradead.org>,
Vineet Gupta <vineet.gupta1@synopsys.com>
Subject: [PATCH 10/21] ARC: Linux Startup and Dynamic Loading
Date: Tue, 18 Dec 2018 13:04:32 -0800 [thread overview]
Message-ID: <1545167083-16764-11-git-send-email-vgupta@synopsys.com> (raw)
In-Reply-To: <1545167083-16764-1-git-send-email-vgupta@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
---
ChangeLog | 3 ++
sysdeps/unix/sysv/linux/arc/dl-static.c | 84 +++++++++++++++++++++++++++++++++
sysdeps/unix/sysv/linux/arc/ldconfig.h | 25 ++++++++++
sysdeps/unix/sysv/linux/arc/ldsodefs.h | 32 +++++++++++++
4 files changed, 144 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/arc/dl-static.c
create mode 100644 sysdeps/unix/sysv/linux/arc/ldconfig.h
create mode 100644 sysdeps/unix/sysv/linux/arc/ldsodefs.h
diff --git a/ChangeLog b/ChangeLog
index ca010c356597..f6ad5968d7de 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -71,6 +71,9 @@
* sysdeps/unix/sysv/linux/arc/sys/user.h: New file.
* sysdeps/unix/sysv/linux/arc/ucontext-macros.h: New file.
* sysdeps/unix/sysv/linux/arc/ucontext_i.sym: New file.
+ * sysdeps/unix/sysv/linux/arc/dl-static.c: New file.
+ * sysdeps/unix/sysv/linux/arc/ldconfig.h: New file.
+ * sysdeps/unix/sysv/linux/arc/ldsodefs.h: New file.
2018-12-17 Joseph Myers <joseph@codesourcery.com>
diff --git a/sysdeps/unix/sysv/linux/arc/dl-static.c b/sysdeps/unix/sysv/linux/arc/dl-static.c
new file mode 100644
index 000000000000..2683ee5e7e2a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/dl-static.c
@@ -0,0 +1,84 @@
+/* Variable initialization. ARC version.
+ Copyright (C) 2001-2018 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <ldsodefs.h>
+
+#ifdef SHARED
+
+void
+_dl_var_init (void *array[])
+{
+ /* It has to match "variables" below. */
+ enum
+ {
+ DL_PAGESIZE = 0
+ };
+
+ GLRO(dl_pagesize) = *((size_t *) array[DL_PAGESIZE]);
+}
+
+#else
+
+static void *variables[] =
+{
+ &GLRO(dl_pagesize)
+};
+
+static void
+_dl_unprotect_relro (struct link_map *l)
+{
+ ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)
+ & ~(GLRO(dl_pagesize) - 1));
+ ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
+ & ~(GLRO(dl_pagesize) - 1));
+
+ if (start != end)
+ __mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE);
+}
+
+void
+_dl_static_init (struct link_map *l)
+{
+ struct link_map *rtld_map = l;
+ struct r_scope_elem **scope;
+ const ElfW(Sym) *ref = NULL;
+ lookup_t loadbase;
+ void (*f) (void *[]);
+ size_t i;
+
+ loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope,
+ NULL, 0, 1, NULL);
+
+ for (scope = l->l_local_scope; *scope != NULL; scope++)
+ for (i = 0; i < (*scope)->r_nlist; i++)
+ if ((*scope)->r_list[i] == loadbase)
+ {
+ rtld_map = (*scope)->r_list[i];
+ break;
+ }
+
+ if (ref != NULL)
+ {
+ f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref);
+ _dl_unprotect_relro (rtld_map);
+ f (variables);
+ _dl_protect_relro (rtld_map);
+ }
+}
+
+#endif
diff --git a/sysdeps/unix/sysv/linux/arc/ldconfig.h b/sysdeps/unix/sysv/linux/arc/ldconfig.h
new file mode 100644
index 000000000000..c38ce20edaea
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/ldconfig.h
@@ -0,0 +1,25 @@
+/* dynamic linker names for ARC
+ Copyright (C) 2001-2018 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <sysdeps/generic/ldconfig.h>
+
+#define SYSDEP_KNOWN_INTERPRETER_NAMES \
+ { "/lib/ld-linux.so.2", FLAG_ELF_LIBC6 },
+#define SYSDEP_KNOWN_LIBRARY_NAMES \
+ { "libc.so.6", FLAG_ELF_LIBC6 }, \
+ { "libm.so.6", FLAG_ELF_LIBC6 },
diff --git a/sysdeps/unix/sysv/linux/arc/ldsodefs.h b/sysdeps/unix/sysv/linux/arc/ldsodefs.h
new file mode 100644
index 000000000000..005c49a7b7cd
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/arc/ldsodefs.h
@@ -0,0 +1,32 @@
+/* Run-time dynamic linker data structures for loaded ELF shared objects. ARC
+ Copyright (C) 2001-2018 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
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _LDSODEFS_H
+
+/* Get the real definitions. */
+#include_next <ldsodefs.h>
+
+/* Now define our stuff. */
+
+/* We need special support to initialize DSO loaded for statically linked
+ binaries. */
+extern void _dl_static_init (struct link_map *map);
+#undef DL_STATIC_INIT
+#define DL_STATIC_INIT(map) _dl_static_init (map)
+
+#endif /* ldsodefs.h */
--
2.7.4
next prev parent reply other threads:[~2018-12-18 21:16 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-18 21:04 [PATCH 00/21] glibc port to ARC processors Vineet Gupta
2018-12-18 21:04 ` [PATCH 01/21] longlong.h: sync from gcc to fix ARC inline asm constraints Vineet Gupta
2018-12-18 22:56 ` Joseph Myers
2018-12-18 23:11 ` Vineet Gupta
2018-12-21 18:46 ` Joseph Myers
2018-12-21 19:07 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 02/21] ARC: add definitions to elf/elf.h Vineet Gupta
2018-12-18 21:04 ` [PATCH 03/21] ARC: ABI Implementation Vineet Gupta
2018-12-18 23:09 ` Joseph Myers
2018-12-19 2:00 ` Vineet Gupta
2018-12-19 17:40 ` Joseph Myers
2018-12-19 20:20 ` Vineet Gupta
2018-12-19 20:37 ` Joseph Myers
2019-01-28 23:03 ` ARC binutils init/fini (was Re: [PATCH 03/21] ARC: ABI Implementation) Vineet Gupta
2019-01-28 23:13 ` Joseph Myers
2019-01-28 23:42 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 04/21] ARC: startup and dynamic linking code Vineet Gupta
2018-12-18 23:24 ` Joseph Myers
2018-12-19 0:52 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 05/21] ARC: Thread Local Storage support Vineet Gupta
2018-12-18 21:04 ` [PATCH 06/21] ARC: Atomics and Locking primitives Vineet Gupta
2018-12-18 23:15 ` Joseph Myers
2019-01-15 0:40 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 07/21] ARC: math soft float support Vineet Gupta
2018-12-18 23:23 ` Joseph Myers
2018-12-19 0:01 ` Joseph Myers
2018-12-20 21:35 ` Vineet Gupta
2018-12-21 1:08 ` Vineet Gupta
2018-12-21 1:19 ` Joseph Myers
2018-12-18 21:04 ` [PATCH 08/21] ARC: Linux Syscall Interface Vineet Gupta
2018-12-18 23:30 ` Joseph Myers
2018-12-19 2:39 ` Vineet Gupta
2018-12-19 17:58 ` ARC vs. generic sigaction (was Re: [PATCH 08/21] ARC: Linux Syscall Interface) Vineet Gupta
2018-12-19 18:07 ` Joseph Myers
2018-12-19 22:00 ` Adhemerval Zanella
2018-12-19 22:23 ` Vineet Gupta
2018-12-20 11:19 ` Adhemerval Zanella
2018-12-20 12:06 ` Arnd Bergmann
2018-12-20 19:25 ` Vineet Gupta
2018-12-20 12:40 ` Florian Weimer
2018-12-20 18:48 ` Vineet Gupta
2019-01-03 13:10 ` Florian Weimer
2018-12-20 19:23 ` Vineet Gupta
2018-12-20 20:06 ` Adhemerval Zanella
2018-12-20 20:46 ` Vineet Gupta
2018-12-21 12:05 ` Adhemerval Zanella
2019-01-09 21:49 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 09/21] ARC: Linux ABI Vineet Gupta
2018-12-18 23:38 ` Joseph Myers
2018-12-19 19:57 ` Vineet Gupta
2018-12-19 20:36 ` Joseph Myers
2018-12-21 23:06 ` Vineet Gupta
2018-12-18 21:04 ` Vineet Gupta [this message]
2018-12-18 23:49 ` [PATCH 10/21] ARC: Linux Startup and Dynamic Loading Joseph Myers
2018-12-19 20:26 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 11/21] ARC: ABI lists Vineet Gupta
2018-12-18 22:31 ` Andreas Schwab
2018-12-18 22:32 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 12/21] ARC: Update syscall-names.list for ARC specific syscalls Vineet Gupta
2018-12-18 21:26 ` Florian Weimer
2018-12-18 21:29 ` Vineet Gupta
2018-12-19 8:16 ` Florian Weimer
2018-12-18 21:04 ` [PATCH 13/21] ARC: Build Infrastructure Vineet Gupta
2018-12-18 23:44 ` Joseph Myers
2018-12-19 21:58 ` Vineet Gupta
2018-12-19 22:17 ` Joseph Myers
2018-12-20 23:21 ` Vineet Gupta
2018-12-20 23:24 ` Joseph Myers
2019-01-29 23:36 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 14/21] ARC: Enable __start as entry point vs. canonical _start Vineet Gupta
2018-12-18 21:28 ` Florian Weimer
2018-12-18 21:31 ` Vineet Gupta
2018-12-18 22:59 ` Joseph Myers
2018-12-18 23:08 ` Vineet Gupta
2018-12-19 20:36 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 15/21] ARC: testsuite fix: elf/check-initfini Vineet Gupta
2018-12-18 21:04 ` [PATCH 16/21] ARC: testsuite fix: sysvipc/* Vineet Gupta
2018-12-19 22:10 ` Adhemerval Zanella
2018-12-18 21:04 ` [PATCH 17/21] ARC: testsuite fix: stdlib/tst-makecontext Vineet Gupta
2018-12-18 22:36 ` Andreas Schwab
2019-01-21 22:32 ` Vineet Gupta
2018-12-18 21:04 ` [PATCH 18/21] ARC: testsuite fix: GD TLS issue Vineet Gupta
2018-12-18 21:04 ` [PATCH 19/21] ARC: fix several unwining and cancelation tests Vineet Gupta
2018-12-18 21:04 ` [PATCH 20/21] build-many-glibcs.py: Enable ARC builds Vineet Gupta
2018-12-18 21:04 ` [PATCH 21/21] NEWS: mention ARC port Vineet Gupta
2018-12-18 23:45 ` Joseph Myers
2018-12-19 18:30 ` Vineet Gupta
2018-12-18 22:52 ` [PATCH 00/21] glibc port to ARC processors Joseph Myers
2018-12-18 23:07 ` Vineet Gupta
2018-12-18 23:52 ` Joseph Myers
2018-12-21 1:55 ` Vineet Gupta
2018-12-21 14:32 ` Joseph Myers
2018-12-21 17:36 ` Vineet Gupta
2018-12-18 23:11 ` Joseph Myers
2018-12-19 23:45 ` Vineet Gupta
2018-12-20 0:14 ` Joseph Myers
2018-12-20 0:51 ` Vineet Gupta
2018-12-20 21:22 ` test related questions (was Re: [PATCH 00/21] glibc port to ARC processors) Vineet Gupta
2018-12-20 21:59 ` Joseph Myers
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