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155 lines
5.7 KiB
C
155 lines
5.7 KiB
C
/* Copyright (C) 2011-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <tls.h>
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#ifndef __ASSEMBLER__
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# include <nptl/pthreadP.h>
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#endif
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#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
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/* Allow hacking in some extra code if desired. */
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#ifndef PSEUDO_EXTRA
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#define PSEUDO_EXTRA
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#endif
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#undef PSEUDO
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#define PSEUDO(name, syscall_name, args) \
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ENTRY(__##syscall_name##_nocancel); \
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PSEUDO_EXTRA \
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moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
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swint1; \
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BNEZ r1, 0f; \
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jrp lr; \
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END(__##syscall_name##_nocancel); \
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ENTRY (name) \
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SINGLE_THREAD_P(r11); \
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BEQZ r11, L(pseudo_cancel); \
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PSEUDO_EXTRA \
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moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
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swint1; \
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BNEZ r1, 0f; \
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jrp lr; \
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L(pseudo_cancel): \
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{ \
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move r11, sp; \
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ST sp, lr; \
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ADDI_PTR sp, sp, -STKSPACE; \
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}; \
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cfi_offset (lr, 0); \
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cfi_def_cfa_offset (STKSPACE); \
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{ \
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ADDI_PTR r12, sp, REGSIZE; \
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ADDI_PTR r13, sp, 2 * REGSIZE; /* set up for PUSHARGS_0 */ \
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}; \
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ST r12, r11; \
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PUSHARGS_##args /* save syscall args */ \
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CENABLE; \
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ADDI_PTR r12, sp, 10 * REGSIZE; \
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{ \
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ST r12, r0; /* save mask */ \
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ADDI_PTR r13, sp, 2 * REGSIZE; /* set up for POPARGS_0 */ \
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}; \
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POPARGS_##args /* restore syscall args */ \
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PSEUDO_EXTRA \
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moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
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swint1; \
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ADDI_PTR r12, sp, 12 * REGSIZE; \
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{ \
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ST r12, r1; /* save syscall result */ \
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ADDI_PTR r12, sp, 11 * REGSIZE; \
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}; \
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{ \
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ST r12, r0; \
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ADDI_PTR r13, sp, 10 * REGSIZE; \
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}; \
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LD r0, r13; /* pass mask as arg1 */ \
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CDISABLE; \
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{ \
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ADDI_PTR lr, sp, STKSPACE; \
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ADDI_PTR r0, sp, 11 * REGSIZE; \
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}; \
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{ \
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LD r0, r0; \
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ADDI_PTR r1, sp, 12 * REGSIZE; \
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}; \
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LD r1, r1; \
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{ \
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LD lr, lr; \
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ADDI_PTR sp, sp, STKSPACE; \
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}; \
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cfi_def_cfa_offset (0); \
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BNEZ r1, 0f
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# define PUSHARGS_0 /* nothing to do */
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# define PUSHARGS_1 PUSHARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; ST r13, r0 };
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# define PUSHARGS_2 PUSHARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; ST r14, r1 };
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# define PUSHARGS_3 PUSHARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; ST r13, r2 };
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# define PUSHARGS_4 PUSHARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; ST r14, r3 };
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# define PUSHARGS_5 PUSHARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; ST r13, r4 };
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# define PUSHARGS_6 PUSHARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; ST r14, r5 };
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# define PUSHARGS_7 PUSHARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; ST r13, r6 };
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# define POPARGS_0 /* nothing to do */
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# define POPARGS_1 POPARGS_0 { ADDI_PTR r14, sp, 3 * REGSIZE; LD r0, r13 };
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# define POPARGS_2 POPARGS_1 { ADDI_PTR r13, sp, 4 * REGSIZE; LD r1, r14 };
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# define POPARGS_3 POPARGS_2 { ADDI_PTR r14, sp, 5 * REGSIZE; LD r2, r13 };
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# define POPARGS_4 POPARGS_3 { ADDI_PTR r13, sp, 6 * REGSIZE; LD r3, r14 };
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# define POPARGS_5 POPARGS_4 { ADDI_PTR r14, sp, 7 * REGSIZE; LD r4, r13 };
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# define POPARGS_6 POPARGS_5 { ADDI_PTR r13, sp, 8 * REGSIZE; LD r5, r14 };
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# define POPARGS_7 POPARGS_6 { ADDI_PTR r14, sp, 9 * REGSIZE; LD r6, r13 };
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# define STKSPACE (13 * REGSIZE)
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# if IS_IN (libpthread)
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# define CENABLE jal __pthread_enable_asynccancel
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# define CDISABLE jal __pthread_disable_asynccancel
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# elif IS_IN (librt)
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# define CENABLE jal __librt_enable_asynccancel
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# define CDISABLE jal __librt_disable_asynccancel
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# else
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# define CENABLE jal __libc_enable_asynccancel
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# define CDISABLE jal __libc_disable_asynccancel
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# endif
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# ifndef __ASSEMBLER__
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# define SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) \
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== 0, 1)
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# else
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# define SINGLE_THREAD_P(reg) \
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ADDLI_PTR reg, tp, MULTIPLE_THREADS_OFFSET; \
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LD reg, reg; \
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CMPEQI reg, reg, 0
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#endif
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#elif !defined __ASSEMBLER__
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# define SINGLE_THREAD_P 1
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# define NO_CANCELLATION 1
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#endif
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#ifndef __ASSEMBLER__
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# define RTLD_SINGLE_THREAD_P \
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__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
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header.multiple_threads) == 0, 1)
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#endif
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