diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/microblaze/sysdep.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/microblaze/sysdep.h | 313 |
1 files changed, 0 insertions, 313 deletions
diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep.h b/sysdeps/unix/sysv/linux/microblaze/sysdep.h deleted file mode 100644 index 1fbbc55de1..0000000000 --- a/sysdeps/unix/sysv/linux/microblaze/sysdep.h +++ /dev/null @@ -1,313 +0,0 @@ -/* Copyright (C) 2000-2017 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/>. */ - -#ifndef _LINUX_MICROBLAZE_SYSDEP_H -#define _LINUX_MICROBLAZE_SYSDEP_H 1 - -#include <sysdeps/unix/sysdep.h> -#include <sysdeps/unix/sysv/linux/sysdep.h> -#include <sysdeps/microblaze/sysdep.h> - -/* Defines RTLD_PRIVATE_ERRNO. */ -#include <dl-sysdep.h> - -/* In order to get __set_errno() definition in INLINE_SYSCALL. */ -#ifndef __ASSEMBLER__ -# include <errno.h> -#endif - -/* For Linux we can use the system call table in the header file - /usr/include/asm/unistd.h - of the kernel. But these symbols do not follow the SYS_* syntax - so we have to redefine the `SYS_ify' macro here. */ -#undef SYS_ify -#define SYS_ify(syscall_name) __NR_##syscall_name - -#ifdef __ASSEMBLER__ - -/* In microblaze ABI function call arguments are passed in registers - r5...r10. The return value is stored in r3 (or r3:r4 regiters pair). - Linux syscall uses the same convention with the addition that the - syscall number is passed in r12. To enter the kernel "brki r14,8" - instruction is used. - None of the abovementioned registers are presumed across function call - or syscall. -*/ -/* Linux uses a negative return value to indicate syscall errors, unlike - most Unices, which use the condition codes' carry flag. - - Since version 2.1 the return value of a system call might be negative - even if the call succeeded. E.g., the `lseek' system call might return - a large offset. Therefore we must not anymore test for < 0, but test - for a real error by making sure the value in %d0 is a real error - number. Linus said he will make sure the no syscall returns a value - in -1 .. -4095 as a valid result so we can savely test with -4095. */ - -/* 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 - -# 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) - -# undef PSEUDO_NOERRNO -# define PSEUDO_NOERRNO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); - -# undef PSEUDO_END_NOERRNO -# define PSEUDO_END_NOERRNO(name) \ - END (name) - -/* The function has to return the error code. */ -# undef PSEUDO_ERRVAL -# define PSEUDO_ERRVAL(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - -# undef PSEUDO_END_ERRVAL -# define PSEUDO_END_ERRVAL(name) \ - END (name) - -# define ret_NOERRNO \ - rtsd r15,8; addk r0,r0,r0; - -# define ret_ERRVAL \ - rtsd r15,8; rsubk r3,r3,r0; - -# ifdef PIC -# define SYSCALL_ERROR_LABEL_DCL 0 -# if RTLD_PRIVATE_ERRNO -# define SYSCALL_ERROR_HANDLER \ -SYSCALL_ERROR_LABEL_DCL: \ - mfs r12,rpc; \ - addik r12,r12,_GLOBAL_OFFSET_TABLE_+8; \ - lwi r12,r12,rtld_errno@GOT; \ - rsubk r3,r3,r0; \ - swi r3,r12,0; \ - rtsd r15,8; \ - addik r3,r0,-1; -# else /* !RTLD_PRIVATE_ERRNO. */ -/* Store (-r3) into errno through the GOT. */ -# 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. */ -# endif /* RTLD_PRIVATE_ERRNO. */ -# else -# define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -# endif /* PIC. */ - -# define DO_CALL(syscall_name, args) \ - addik r12,r0,SYS_ify (syscall_name); \ - brki r14,8; \ - addk r0,r0,r0; - -#else /* not __ASSEMBLER__ */ - -/* Define a macro which expands into the inline wrapper code for a system - call. */ -# undef INLINE_SYSCALL -# define INLINE_SYSCALL(name, nr, args...) \ -({ INTERNAL_SYSCALL_DECL(err); \ - unsigned long resultvar = INTERNAL_SYSCALL(name, err, nr, args); \ - if (INTERNAL_SYSCALL_ERROR_P (resultvar, err)) \ - { \ - __set_errno (INTERNAL_SYSCALL_ERRNO (resultvar, err)); \ - resultvar = (unsigned long) -1; \ - } \ - (long) resultvar; \ -}) - -# undef INTERNAL_SYSCALL_DECL -# define INTERNAL_SYSCALL_DECL(err) do { } while (0) - -/* Define a macro which expands inline into the wrapper code for a system - call. This use is for internal calls that do not need to handle errors - normally. It will never touch errno. This returns just what the kernel - gave back. */ -# undef INTERNAL_SYSCALL -# define INTERNAL_SYSCALL(name, err, nr, args...) \ - inline_syscall##nr(SYS_ify(name), args) - -# undef INTERNAL_SYSCALL_NCS -# define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ - inline_syscall##nr(name, args) - -# undef INTERNAL_SYSCALL_ERROR_P -# define INTERNAL_SYSCALL_ERROR_P(val, err) \ - ((unsigned int) (val) >= -4095U) - -# undef INTERNAL_SYSCALL_ERRNO -# define INTERNAL_SYSCALL_ERRNO(val, err) (-(val)) - -# define SYSCALL_CLOBBERS_6 "r11", "r4", "memory" -# define SYSCALL_CLOBBERS_5 "r10", SYSCALL_CLOBBERS_6 -# define SYSCALL_CLOBBERS_4 "r9", SYSCALL_CLOBBERS_5 -# define SYSCALL_CLOBBERS_3 "r8", SYSCALL_CLOBBERS_4 -# define SYSCALL_CLOBBERS_2 "r7", SYSCALL_CLOBBERS_3 -# define SYSCALL_CLOBBERS_1 "r6", SYSCALL_CLOBBERS_2 -# define SYSCALL_CLOBBERS_0 "r5", SYSCALL_CLOBBERS_1 - -# define inline_syscall0(name,dummy) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r12) \ - : SYSCALL_CLOBBERS_0 ); __ret; \ - }) - -# define inline_syscall1(name,arg1) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r12) \ - : SYSCALL_CLOBBERS_1 ); __ret; \ - }) - -# define inline_syscall2(name,arg1,arg2) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - register long __r6 __asm__("r6") = (long)(arg2); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r6), "r"(__r12) \ - : SYSCALL_CLOBBERS_2 ); __ret; \ - }) - - -# define inline_syscall3(name,arg1,arg2,arg3) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - register long __r6 __asm__("r6") = (long)(arg2); \ - register long __r7 __asm__("r7") = (long)(arg3); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r6), "r"(__r7), "r"(__r12) \ - : SYSCALL_CLOBBERS_3 ); __ret; \ - }) - - -# define inline_syscall4(name,arg1,arg2,arg3,arg4) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - register long __r6 __asm__("r6") = (long)(arg2); \ - register long __r7 __asm__("r7") = (long)(arg3); \ - register long __r8 __asm__("r8") = (long)(arg4); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r6), "r"(__r7), "r"(__r8),"r"(__r12) \ - : SYSCALL_CLOBBERS_4 ); __ret; \ - }) - - -# define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - register long __r6 __asm__("r6") = (long)(arg2); \ - register long __r7 __asm__("r7") = (long)(arg3); \ - register long __r8 __asm__("r8") = (long)(arg4); \ - register long __r9 __asm__("r9") = (long)(arg5); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r6), "r"(__r7), "r"(__r8),"r"(__r9), "r"(__r12) \ - : SYSCALL_CLOBBERS_5 ); __ret; \ - }) - - -# define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \ - ({ \ - register long __ret __asm__("r3"); \ - register long __r12 __asm__("r12") = name; \ - register long __r5 __asm__("r5") = (long)(arg1); \ - register long __r6 __asm__("r6") = (long)(arg2); \ - register long __r7 __asm__("r7") = (long)(arg3); \ - register long __r8 __asm__("r8") = (long)(arg4); \ - register long __r9 __asm__("r9") = (long)(arg5); \ - register long __r10 __asm__("r10") = (long)(arg6); \ - __asm__ __volatile__( "brki r14,8; nop;" \ - : "=r"(__ret) \ - : "r"(__r5), "r"(__r6), "r"(__r7), "r"(__r8),"r"(__r9), "r"(__r10), \ - "r"(__r12) \ - : SYSCALL_CLOBBERS_6 ); __ret; \ - }) - - -/* Pointer mangling is not yet supported for Microblaze. */ -# define PTR_MANGLE(var) (void) (var) -# define PTR_DEMANGLE(var) (void) (var) - -#endif /* not __ASSEMBLER__ */ - -#endif /* _LINUX_MICROBLAZE_SYSDEP_H */ |