diff options
Diffstat (limited to 'libc/sysdeps/linux/microblaze/sysdep.h')
| -rw-r--r-- | libc/sysdeps/linux/microblaze/sysdep.h | 83 |
1 files changed, 81 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/microblaze/sysdep.h b/libc/sysdeps/linux/microblaze/sysdep.h index 1f01a2a1d..a463d339e 100644 --- a/libc/sysdeps/linux/microblaze/sysdep.h +++ b/libc/sysdeps/linux/microblaze/sysdep.h @@ -1,9 +1,25 @@ +/* Copyright (C) 2000-2016 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 <common/sysdep.h> #ifdef __ASSEMBLER__ -/* Syntactic details of assembler. */ - # define ALIGNARG(log2) log2 # define ASM_SIZE_DIRECTIVE(name) .size name,.-name @@ -22,4 +38,67 @@ # define L(name) $L##name # endif +/* We don't want the label for the error handler to be visible in the symbol + table when we define it here. */ +# ifdef __PIC__ +# define SYSCALL_ERROR_LABEL 0f +# else +# define SYSCALL_ERROR_LABEL __syscall_error +# endif + +# define DO_CALL(syscall_name, args) \ + addik r12,r0,SYS_ify (syscall_name); \ + brki r14,8; \ + addk r0,r0,r0; + +# undef PSEUDO +# define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY (name) \ + DO_CALL (syscall_name, args); \ + addik r12,r0,-4095; \ + cmpu r12,r12,r3; \ + bgei r12,SYSCALL_ERROR_LABEL; + +# undef PSEUDO_END +# define PSEUDO_END(name) \ + SYSCALL_ERROR_HANDLER; \ + END (name) + +#ifdef __PIC__ +# define SYSCALL_ERROR_LABEL_DCL 0 +# if defined _LIBC_REENTRANT +# define SYSCALL_ERROR_HANDLER \ +SYSCALL_ERROR_LABEL_DCL: \ + addik r1,r1,-16; \ + swi r15,r1,0; \ + swi r20,r1,8; \ + rsubk r3,r3,r0; \ + swi r3,r1,12; \ + mfs r20,rpc; \ + addik r20,r20,_GLOBAL_OFFSET_TABLE_+8; \ + brlid r15,__errno_location@PLT; \ + nop; \ + lwi r4,r1,12; \ + swi r4,r3,0; \ + lwi r20,r1,8; \ + lwi r15,r1,0; \ + addik r1,r1,16; \ + rtsd r15,8; \ + addik r3,r0,-1; +# else /* !_LIBC_REENTRANT. */ +# define SYSCALL_ERROR_HANDLER \ +SYSCALL_ERROR_LABEL_DCL: \ + mfs r12,rpc; \ + addik r12,r12,_GLOBAL_OFFSET_TABLE_+8; \ + lwi r12,r12,errno@GOT; \ + rsubk r3,r3,r0; \ + swi r3,r12,0; \ + rtsd r15,8; \ + addik r3,r0,-1; +# endif /* _LIBC_REENTRANT. */ +#else +# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ +#endif /* PIC. */ + #endif |