diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h')
| -rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h b/REORG.TODO/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h new file mode 100644 index 0000000000..66d6962b80 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/alpha/sysdep-cancel.h @@ -0,0 +1,174 @@ +/* Copyright (C) 2003-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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) + +/* ??? Assumes that nothing comes between PSEUDO and PSEUDO_END + besides "ret". */ + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .globl __##syscall_name##_nocancel; \ + .type __##syscall_name##_nocancel, @function; \ + .usepv __##syscall_name##_nocancel, std; \ + .align 4; \ + cfi_startproc; \ +__LABEL(__##syscall_name##_nocancel) \ + ldgp gp, 0(pv); \ + PSEUDO_PROF; \ +__LABEL($pseudo_nocancel) \ + PSEUDO_PREPARE_ARGS; \ + lda v0, SYS_ify(syscall_name); \ + call_pal PAL_callsys; \ + bne a3, SYSCALL_ERROR_LABEL; \ +__LABEL($pseudo_ret) \ + .subsection 2; \ + .size __##syscall_name##_nocancel, .-__##syscall_name##_nocancel; \ + .globl name; \ + .type name, @function; \ + .usepv name, std; \ + .align 4; \ + cfi_startproc; \ +__LABEL(name) \ + ldgp gp, 0(pv); \ + PSEUDO_PROF; \ + SINGLE_THREAD_P(t0); \ + beq t0, $pseudo_nocancel; \ + subq sp, 64, sp; \ + cfi_def_cfa_offset(64); \ + stq ra, 0(sp); \ + cfi_offset(ra, -64); \ + SAVE_ARGS_##args; \ + CENABLE; \ + LOAD_ARGS_##args; \ + /* Save the CENABLE return value in RA. That register \ + is preserved across syscall and the real return \ + address is saved on the stack. */ \ + mov v0, ra; \ + lda v0, SYS_ify(syscall_name); \ + call_pal PAL_callsys; \ + stq v0, 8(sp); \ + mov ra, a0; \ + bne a3, $multi_error; \ + CDISABLE; \ + ldq ra, 0(sp); \ + ldq v0, 8(sp); \ + addq sp, 64, sp; \ + cfi_remember_state; \ + cfi_restore(ra); \ + cfi_def_cfa_offset(0); \ + ret; \ + cfi_restore_state; \ +__LABEL($multi_error) \ + CDISABLE; \ + ldq ra, 0(sp); \ + ldq v0, 8(sp); \ + addq sp, 64, sp; \ + cfi_restore(ra); \ + cfi_def_cfa_offset(0); \ + SYSCALL_ERROR_FALLTHRU; \ + SYSCALL_ERROR_HANDLER; \ + cfi_endproc; \ + .previous + +# undef PSEUDO_END +# define PSEUDO_END(sym) \ + cfi_endproc; \ + .subsection 2; \ + .size sym, .-sym + +# define SAVE_ARGS_0 /* Nothing. */ +# define SAVE_ARGS_1 SAVE_ARGS_0; stq a0, 8(sp) +# define SAVE_ARGS_2 SAVE_ARGS_1; stq a1, 16(sp) +# define SAVE_ARGS_3 SAVE_ARGS_2; stq a2, 24(sp) +# define SAVE_ARGS_4 SAVE_ARGS_3; stq a3, 32(sp) +# define SAVE_ARGS_5 SAVE_ARGS_4; stq a4, 40(sp) +# define SAVE_ARGS_6 SAVE_ARGS_5; stq a5, 48(sp) + +# define LOAD_ARGS_0 /* Nothing. */ +# define LOAD_ARGS_1 LOAD_ARGS_0; ldq a0, 8(sp) +# define LOAD_ARGS_2 LOAD_ARGS_1; ldq a1, 16(sp) +# define LOAD_ARGS_3 LOAD_ARGS_2; ldq a2, 24(sp) +# define LOAD_ARGS_4 LOAD_ARGS_3; ldq a3, 32(sp) +# define LOAD_ARGS_5 LOAD_ARGS_4; ldq a4, 40(sp) +# define LOAD_ARGS_6 LOAD_ARGS_5; ldq a5, 48(sp) + +# if IS_IN (libpthread) +# define __local_enable_asynccancel __pthread_enable_asynccancel +# define __local_disable_asynccancel __pthread_disable_asynccancel +# define __local_multiple_threads __pthread_multiple_threads +# elif IS_IN (libc) +# define __local_enable_asynccancel __libc_enable_asynccancel +# define __local_disable_asynccancel __libc_disable_asynccancel +# define __local_multiple_threads __libc_multiple_threads +# elif IS_IN (librt) +# define __local_enable_asynccancel __librt_enable_asynccancel +# define __local_disable_asynccancel __librt_disable_asynccancel +# else +# error Unsupported library +# endif + +# ifdef PIC +# define CENABLE bsr ra, __local_enable_asynccancel !samegp +# define CDISABLE bsr ra, __local_disable_asynccancel !samegp +# else +# define CENABLE jsr ra, __local_enable_asynccancel; ldgp ra, 0(gp) +# define CDISABLE jsr ra, __local_disable_asynccancel; ldgp ra, 0(gp) +# endif + +# if IS_IN (libpthread) || IS_IN (libc) +# ifndef __ASSEMBLER__ +extern int __local_multiple_threads attribute_hidden; +# define SINGLE_THREAD_P \ + __builtin_expect (__local_multiple_threads == 0, 1) +# elif defined(PIC) +# define SINGLE_THREAD_P(reg) ldl reg, __local_multiple_threads(gp) !gprel +# else +# define SINGLE_THREAD_P(reg) \ + ldah reg, __local_multiple_threads(gp) !gprelhigh; \ + ldl reg, __local_multiple_threads(reg) !gprellow +# endif +# else +# ifndef __ASSEMBLER__ +# define SINGLE_THREAD_P \ + __builtin_expect (THREAD_GETMEM (THREAD_SELF, \ + header.multiple_threads) == 0, 1) +# else +# define SINGLE_THREAD_P(reg) \ + call_pal PAL_rduniq; \ + ldl reg, MULTIPLE_THREADS_OFFSET($0) +# endif +# endif + +#else + +# 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 |