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* [glibc] hurd, htl: Add some x86_64-specific code
@ 2023-02-12 15:36 Samuel Thibault
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From: Samuel Thibault @ 2023-02-12 15:36 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=d08ae9c3fbf583508c300c7fa59ce6a05a8a47b6
commit d08ae9c3fbf583508c300c7fa59ce6a05a8a47b6
Author: Sergey Bugaev <bugaevc@gmail.com>
Date: Sun Feb 12 14:10:42 2023 +0300
hurd, htl: Add some x86_64-specific code
Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230212111044.610942-12-bugaevc@gmail.com>
Diff:
---
sysdeps/mach/hurd/x86_64/static-start.S | 27 +++++++++++++++++++++++++++
sysdeps/mach/hurd/x86_64/tlsdesc.sym | 22 ++++++++++++++++++++++
sysdeps/x86_64/htl/machine-sp.h | 29 +++++++++++++++++++++++++++++
3 files changed, 78 insertions(+)
diff --git a/sysdeps/mach/hurd/x86_64/static-start.S b/sysdeps/mach/hurd/x86_64/static-start.S
new file mode 100644
index 0000000000..982d3d52e4
--- /dev/null
+++ b/sysdeps/mach/hurd/x86_64/static-start.S
@@ -0,0 +1,27 @@
+/* Startup code for statically linked Hurd/x86_64 binaries.
+ Copyright (C) 1998-2023 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
+ <https://www.gnu.org/licenses/>. */
+
+ .text
+ .globl _start
+_start:
+ call _hurd_stack_setup
+ xorq %rdx, %rdx
+ jmp _start1
+
+#define _start _start1
+#include <sysdeps/x86_64/start.S>
diff --git a/sysdeps/mach/hurd/x86_64/tlsdesc.sym b/sysdeps/mach/hurd/x86_64/tlsdesc.sym
new file mode 100644
index 0000000000..da3b96c1cc
--- /dev/null
+++ b/sysdeps/mach/hurd/x86_64/tlsdesc.sym
@@ -0,0 +1,22 @@
+#include <stddef.h>
+#include <sysdep.h>
+#include <tls.h>
+#include <link.h>
+#include <dl-tlsdesc.h>
+
+--
+
+-- We have to override sysdeps/x86_64/tlsdesc.sym to adapt to our libpthread.
+
+-- Abuse tls.h macros to derive offsets relative to the thread register.
+
+DTV_OFFSET offsetof(tcbhead_t, dtv)
+
+TLSDESC_ARG offsetof(struct tlsdesc, arg)
+
+TLSDESC_GEN_COUNT offsetof(struct tlsdesc_dynamic_arg, gen_count)
+TLSDESC_MODID offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_module)
+TLSDESC_MODOFF offsetof(struct tlsdesc_dynamic_arg, tlsinfo.ti_offset)
+
+TI_MODULE_OFFSET offsetof(tls_index, ti_module)
+TI_OFFSET_OFFSET offsetof(tls_index, ti_offset)
diff --git a/sysdeps/x86_64/htl/machine-sp.h b/sysdeps/x86_64/htl/machine-sp.h
new file mode 100644
index 0000000000..7ae1c94108
--- /dev/null
+++ b/sysdeps/x86_64/htl/machine-sp.h
@@ -0,0 +1,29 @@
+/* Machine-specific function to return the stack pointer. x86_64 version.
+ Copyright (C) 1994-2023 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
+ <https://www.gnu.org/licenses/>. */
+
+#ifndef _MACHINE_SP_H
+#define _MACHINE_SP_H
+
+/* Return the current stack pointer. */
+
+#define __thread_stack_pointer() ({ \
+ register uintptr_t __sp__ asm("rsp"); \
+ __sp__; \
+})
+
+#endif /* machine-sp.h */
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