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authorH.J. Lu <hjl.tools@gmail.com>2012-05-11 14:33:12 -0700
committerH.J. Lu <hjl.tools@gmail.com>2012-05-11 14:33:12 -0700
commit60d45b36a5cf5befde06d44424c720edf1f88244 (patch)
tree72d93364109a284ee53c3c8e90bcf2aeefc20283 /nptl
parent842b81d6113b45c9a10a93dd8415639c414df946 (diff)
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Add sysdeps/x86_64/x32/tls.h
Diffstat (limited to 'nptl')
-rw-r--r--nptl/ChangeLog4
-rw-r--r--nptl/sysdeps/x86_64/x32/tls.h46
2 files changed, 50 insertions, 0 deletions
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index bf648a3037..49e42efc44 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,5 +1,9 @@
2012-05-11 H.J. Lu <hongjiu.lu@intel.com>
+ * sysdeps/x86_64/x32/tls.h: New file.
+
+2012-05-11 H.J. Lu <hongjiu.lu@intel.com>
+
* sysdeps/x86_64/tls.h (THREAD_SETMEM): Use uint64_t on 64-bit
integer.
(THREAD_SETMEM_NC): Likewise.
diff --git a/nptl/sysdeps/x86_64/x32/tls.h b/nptl/sysdeps/x86_64/x32/tls.h
new file mode 100644
index 0000000000..6cc0ea73ee
--- /dev/null
+++ b/nptl/sysdeps/x86_64/x32/tls.h
@@ -0,0 +1,46 @@
+/* Definition for thread-local data handling. nptl/x32 version.
+ Copyright (C) 2012 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 _X32_TLS_H
+#define _X32_TLS_H 1
+
+#include <sysdeps/x86_64/tls.h>
+
+#ifndef __ASSEMBLER__
+
+/* X32 doesn't support 32-bit indirect call via memory. Instead, we
+ load 32-bit address from memory into the lower 32bits of return
+ register, which will automatically zero-extend the uppper 32-bits
+ of return register. We then do the indirect call via 64-bit return
+ register. */
+# undef CALL_THREAD_FCT
+# define CALL_THREAD_FCT(descr) \
+ ({ void *__res; \
+ asm volatile ("movl %%fs:%P2, %%edi\n\t" \
+ "movl %%fs:%P1, %k0\n\t" \
+ "callq *%q0" \
+ : "=a" (__res) \
+ : "i" (offsetof (struct pthread, start_routine)), \
+ "i" (offsetof (struct pthread, arg)) \
+ : "di", "si", "cx", "dx", "r8", "r9", "r10", "r11", \
+ "memory", "cc"); \
+ __res; })
+
+#endif /* __ASSEMBLER__ */
+
+#endif /* x32/tls.h */