diff options
Diffstat (limited to 'nptl/sysdeps')
| -rw-r--r-- | nptl/sysdeps/x86_64/x32/tls.h | 46 |
1 files changed, 46 insertions, 0 deletions
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 */ |