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authorRoland McGrath <roland@hack.frob.com>2014-06-11 21:33:32 -0700
committerRoland McGrath <roland@hack.frob.com>2014-06-11 21:33:32 -0700
commit14642b8511ed1d6ecfd326de8688853118308082 (patch)
treed07bc0da0c2a988b094dbe73b6b1df5e1296447a /sysdeps/x86_64/x32
parent31c44fea314ea227356b72c3ec29616b9692e39d (diff)
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Move x86_64 code out of nptl/ subdirectory.
Diffstat (limited to 'sysdeps/x86_64/x32')
-rw-r--r--sysdeps/x86_64/x32/nptl/shlib-versions3
-rw-r--r--sysdeps/x86_64/x32/nptl/tls.h46
2 files changed, 49 insertions, 0 deletions
diff --git a/sysdeps/x86_64/x32/nptl/shlib-versions b/sysdeps/x86_64/x32/nptl/shlib-versions
new file mode 100644
index 0000000000..8fcad2e566
--- /dev/null
+++ b/sysdeps/x86_64/x32/nptl/shlib-versions
@@ -0,0 +1,3 @@
+# Configuration DEFAULT Earliest symbol set
+# ------------- --------------- ------------------------------
+x86_64-.*-linux.* libpthread=0 GLIBC_2.16
diff --git a/sysdeps/x86_64/x32/nptl/tls.h b/sysdeps/x86_64/x32/nptl/tls.h
new file mode 100644
index 0000000000..bd73d3f9a1
--- /dev/null
+++ b/sysdeps/x86_64/x32/nptl/tls.h
@@ -0,0 +1,46 @@
+/* Definition for thread-local data handling. nptl/x32 version.
+ Copyright (C) 2012-2014 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_next <tls.h>
+
+#ifndef __ASSEMBLER__
+
+/* X32 doesn't support 32-bit indirect calls via memory. Instead, we
+ load the 32-bit address from memory into the lower 32 bits of the
+ return-value register, which will automatically zero-extend the upper
+ 32 bits of the return-value register. We then do the indirect call
+ via the 64-bit return-value 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 */