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/* Copyright (C) 2011-2017 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 IS_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
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