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/* Definition for thread-local data handling. nptl/x32 version.
Copyright (C) 2012-2016 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 */
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