155 lines
5.7 KiB
C
155 lines
5.7 KiB
C
/* Copyright (C) 2011-2014 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
|
|
|
|
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/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <tls.h>
|
|
#ifndef __ASSEMBLER__
|
|
# include <nptl/pthreadP.h>
|
|
#endif
|
|
|
|
#if !defined NOT_IN_libc || IS_IN (libpthread) || IS_IN (librt)
|
|
|
|
/* Allow hacking in some extra code if desired. */
|
|
#ifndef PSEUDO_EXTRA
|
|
#define PSEUDO_EXTRA
|
|
#endif
|
|
|
|
#undef PSEUDO
|
|
#define PSEUDO(name, syscall_name, args) \
|
|
ENTRY(__##syscall_name##_nocancel); \
|
|
PSEUDO_EXTRA \
|
|
moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
|
|
swint1; \
|
|
BNEZ r1, 0f; \
|
|
jrp lr; \
|
|
END(__##syscall_name##_nocancel); \
|
|
ENTRY (name) \
|
|
SINGLE_THREAD_P(r11); \
|
|
BEQZ r11, L(pseudo_cancel); \
|
|
PSEUDO_EXTRA \
|
|
moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
|
|
swint1; \
|
|
BNEZ r1, 0f; \
|
|
jrp lr; \
|
|
L(pseudo_cancel): \
|
|
{ \
|
|
move r11, sp; \
|
|
ST sp, lr; \
|
|
ADDI_PTR sp, sp, -STKSPACE; \
|
|
}; \
|
|
cfi_offset (lr, 0); \
|
|
cfi_def_cfa_offset (STKSPACE); \
|
|
{ \
|
|
ADDI_PTR r12, sp, REGSIZE; \
|
|
ADDI_PTR r13, sp, 2 * REGSIZE; /* set up for PUSHARGS_0 */ \
|
|
}; \
|
|
ST r12, r11; \
|
|
PUSHARGS_##args /* save syscall args */ \
|
|
CENABLE; \
|
|
ADDI_PTR r12, sp, 10 * REGSIZE; \
|
|
{ \
|
|
ST r12, r0; /* save mask */ \
|
|
ADDI_PTR r13, sp, 2 * REGSIZE; /* set up for POPARGS_0 */ \
|
|
}; \
|
|
POPARGS_##args /* restore syscall args */ \
|
|
PSEUDO_EXTRA \
|
|
moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
|
|
swint1; \
|
|
ADDI_PTR r12, sp, 12 * REGSIZE; \
|
|
{ \
|
|
ST r12, r1; /* save syscall result */ \
|
|
ADDI_PTR r12, sp, 11 * REGSIZE; \
|
|
}; \
|
|
{ \
|
|
ST r12, r0; \
|
|
ADDI_PTR r13, sp, 10 * REGSIZE; \
|
|
}; \
|
|
LD r0, r13; /* pass mask as arg1 */ \
|
|
CDISABLE; \
|
|
{ \
|
|
ADDI_PTR lr, sp, STKSPACE; \
|
|
ADDI_PTR r0, sp, 11 * REGSIZE; \
|
|
}; \
|
|
{ \
|
|
LD r0, r0; \
|
|
ADDI_PTR r1, sp, 12 * REGSIZE; \
|
|
}; \
|
|
LD r1, r1; \
|
|
{ \
|
|
LD lr, lr; \
|
|
ADDI_PTR sp, sp, STKSPACE; \
|
|
}; \
|
|
cfi_def_cfa_offset (0); \
|
|
BNEZ r1, 0f
|
|
|
|
# define PUSHARGS_0 /* nothing to do */
|
|
# define PUSHARGS_1 PUSHARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; ST r13, r0 };
|
|
# define PUSHARGS_2 PUSHARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; ST r14, r1 };
|
|
# define PUSHARGS_3 PUSHARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; ST r13, r2 };
|
|
# define PUSHARGS_4 PUSHARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; ST r14, r3 };
|
|
# define PUSHARGS_5 PUSHARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; ST r13, r4 };
|
|
# define PUSHARGS_6 PUSHARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; ST r14, r5 };
|
|
# define PUSHARGS_7 PUSHARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; ST r13, r6 };
|
|
|
|
# define POPARGS_0 /* nothing to do */
|
|
# define POPARGS_1 POPARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; LD r0, r13 };
|
|
# define POPARGS_2 POPARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; LD r1, r14 };
|
|
# define POPARGS_3 POPARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; LD r2, r13 };
|
|
# define POPARGS_4 POPARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; LD r3, r14 };
|
|
# define POPARGS_5 POPARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; LD r4, r13 };
|
|
# define POPARGS_6 POPARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; LD r5, r14 };
|
|
# define POPARGS_7 POPARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; LD r6, r13 };
|
|
|
|
# define STKSPACE (13 * REGSIZE)
|
|
|
|
# if IS_IN (libpthread)
|
|
# define CENABLE jal __pthread_enable_asynccancel
|
|
# define CDISABLE jal __pthread_disable_asynccancel
|
|
# elif IS_IN (librt)
|
|
# define CENABLE jal __librt_enable_asynccancel
|
|
# define CDISABLE jal __librt_disable_asynccancel
|
|
# else
|
|
# define CENABLE jal __libc_enable_asynccancel
|
|
# define CDISABLE jal __libc_disable_asynccancel
|
|
# endif
|
|
|
|
# ifndef __ASSEMBLER__
|
|
# define SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) \
|
|
== 0, 1)
|
|
# else
|
|
# define SINGLE_THREAD_P(reg) \
|
|
ADDLI_PTR reg, tp, MULTIPLE_THREADS_OFFSET; \
|
|
LD reg, reg; \
|
|
CMPEQI reg, reg, 0
|
|
#endif
|
|
|
|
#elif !defined __ASSEMBLER__
|
|
|
|
# define SINGLE_THREAD_P 1
|
|
# define NO_CANCELLATION 1
|
|
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLER__
|
|
# define RTLD_SINGLE_THREAD_P \
|
|
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
|
|
header.multiple_threads) == 0, 1)
|
|
#endif
|