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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2017-12-16 21:01:39 +0100
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2017-12-31 11:12:07 +0100
commit23bb649090ff588e8642f0c581cfe7ce2d29c757 (patch)
tree4a68d696415fce9f2dd50edf27a79bacbde3fc50 /libpthread/nptl/sysdeps/m68k/dl-tls.h
parent604781391549faafc59516700d9439ab1a7ec19b (diff)
m68k: add NPTL/TLS support
Port over NPTL/TLS support from GNU C Library. In the first step only the slower syscall is used for TLS access. The uClibc-ng testsuite shows 79 errors, so their is room for bugfixes and improvements.
Diffstat (limited to 'libpthread/nptl/sysdeps/m68k/dl-tls.h')
-rw-r--r--libpthread/nptl/sysdeps/m68k/dl-tls.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/m68k/dl-tls.h b/libpthread/nptl/sysdeps/m68k/dl-tls.h
new file mode 100644
index 000000000..c0af06e1e
--- /dev/null
+++ b/libpthread/nptl/sysdeps/m68k/dl-tls.h
@@ -0,0 +1,46 @@
+/* Thread-local storage handling in the ELF dynamic linker. M68K version.
+ Copyright (C) 2010-2017 Free Software Foundation, Inc.
+ Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
+
+ 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/>. */
+
+
+/* Type used for the representation of TLS information in the GOT. */
+typedef struct
+{
+ unsigned long int ti_module;
+ unsigned long int ti_offset;
+} tls_index;
+
+/* The thread pointer points 0x7000 past the first static TLS block. */
+#define TLS_TP_OFFSET 0x7000
+
+/* Dynamic thread vector pointers point 0x8000 past the start of each
+ TLS block. */
+#define TLS_DTV_OFFSET 0x8000
+
+/* Compute the value for a TPREL reloc. */
+#define TLS_TPREL_VALUE(sym_map, sym, reloc) \
+ ((sym_map)->l_tls_offset + (sym)->st_value + (reloc)->r_addend \
+ - TLS_TP_OFFSET)
+
+/* Compute the value for a DTPREL reloc. */
+#define TLS_DTPREL_VALUE(sym, reloc) \
+ ((sym)->st_value + (reloc)->r_addend - TLS_DTV_OFFSET)
+
+extern void *__tls_get_addr (tls_index *ti);
+
+#define GET_ADDR_OFFSET (ti->ti_offset + TLS_DTV_OFFSET)
+#define __TLS_GET_ADDR(__ti) (__tls_get_addr (__ti) - TLS_DTV_OFFSET)