/* Copyright (C) 2011 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Chris Metcalf , 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include #include #ifndef __ASSEMBLER__ # include #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