| /* 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 || defined IS_IN_libpthread || defined 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) |
| |
| # ifdef IS_IN_libpthread |
| # define CENABLE jal __pthread_enable_asynccancel |
| # define CDISABLE jal __pthread_disable_asynccancel |
| # elif defined 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 |