diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep.h b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep.h new file mode 100644 index 000000000..546a21231 --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/sh/sysdep.h @@ -0,0 +1,224 @@ +/* Copyright (C) 1992,1993,1995,1996,1997,1998,1999,2000,2002,2003,2004 + Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>, August 1995. + Changed by Kaz Kojima, <kkojima@rr.iij4u.or.jp>. + + 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. */ + +#ifndef _LINUX_SH_SYSDEP_H +#define _LINUX_SH_SYSDEP_H 1 + +/* There is some commonality. */ +#include <sysdeps/unix/sh/sysdep.h> + +/* 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__ + +/* 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 R0 + 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. */ + +#define _IMM1 #-1 +#define _IMM12 #-12 +#undef PSEUDO +#define PSEUDO(name, syscall_name, args) \ + .text; \ + ENTRY (name); \ + DO_CALL (syscall_name, args); \ + mov r0,r1; \ + mov _IMM12,r2; \ + shad r2,r1; \ + not r1,r1; \ + tst r1,r1; \ + bf .Lpseudo_end; \ + SYSCALL_ERROR_HANDLER; \ + .Lpseudo_end: + +#undef PSEUDO_END +#define PSEUDO_END(name) \ + 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) + +#define ret_NOERRNO ret + +#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_ERRVAL ret + +#ifndef PIC +# define SYSCALL_ERROR_HANDLER \ + mov.l 0f,r1; \ + jmp @r1; \ + mov r0,r4; \ + .align 2; \ + 0: .long __syscall_error + +#include <libc/sysdeps/linux/sh/syscall_error.S> +#else +# ifdef RTLD_PRIVATE_ERRNO + +# define SYSCALL_ERROR_HANDLER \ + neg r0,r1; \ + mov.l 0f,r12; \ + mova 0f,r0; \ + add r0,r12; \ + mov.l 1f,r0; \ + mov.l r1,@(r0,r12) + bra .Lpseudo_end; \ + mov _IMM1,r0; \ + .align 2; \ + 0: .long _GLOBAL_OFFSET_TABLE_; \ + 1: .long rtld_errno@GOTOFF + +# elif defined _LIBC_REENTRANT + +# if USE___THREAD + +# ifndef NOT_IN_libc +# define SYSCALL_ERROR_ERRNO __libc_errno +# else +# define SYSCALL_ERROR_ERRNO errno +# endif +# define SYSCALL_ERROR_HANDLER \ + neg r0,r1; \ + mov r12,r2; \ + mov.l 0f,r12; \ + mova 0f,r0; \ + add r0,r12; \ + mov.l 1f,r0; \ + stc gbr, r4; \ + mov.l @(r0,r12),r0; \ + bra .Lskip; \ + add r4,r0; \ + .align 2; \ + 1: .long SYSCALL_ERROR_ERRNO@GOTTPOFF; \ + .Lskip: \ + mov r2,r12; \ + mov.l r1,@r0; \ + bra .Lpseudo_end; \ + mov _IMM1,r0; \ + .align 2; \ + 0: .long _GLOBAL_OFFSET_TABLE_ +# else + +# define SYSCALL_ERROR_HANDLER \ + neg r0,r1; \ + mov.l r14,@-r15; \ + mov.l r12,@-r15; \ + mov.l r1,@-r15; \ + mov.l 0f,r12; \ + mova 0f,r0; \ + add r0,r12; \ + sts.l pr,@-r15; \ + mov r15,r14; \ + mov.l 1f,r1; \ + bsrf r1; \ + nop; \ + 2: mov r14,r15; \ + lds.l @r15+,pr; \ + mov.l @r15+,r1; \ + mov.l r1,@r0; \ + mov.l @r15+,r12; \ + mov.l @r15+,r14; \ + bra .Lpseudo_end; \ + mov _IMM1,r0; \ + .align 2; \ + 0: .long _GLOBAL_OFFSET_TABLE_; \ + 1: .long PLTJMP(C_SYMBOL_NAME(__errno_location))-(2b-.) +/* A quick note: it is assumed that the call to `__errno_location' does + not modify the stack! */ +# endif +# else + +/* Store (-r0) into errno through the GOT. */ +# define SYSCALL_ERROR_HANDLER \ + neg r0,r1; \ + mov r12,r2; \ + mov.l 0f,r12; \ + mova 0f,r0; \ + add r0,r12; \ + mov.l 1f,r0; \ + mov.l @(r0,r12),r0; \ + mov r2,r12; \ + mov.l r1,@r0; \ + bra .Lpseudo_end; \ + mov _IMM1,r0; \ + .align 2; \ + 0: .long _GLOBAL_OFFSET_TABLE_; \ + 1: .long errno@GOT +# endif /* _LIBC_REENTRANT */ +#endif /* PIC */ + +# ifdef NEED_SYSCALL_INST_PAD +# define SYSCALL_INST_PAD \ + or r0,r0; or r0,r0; or r0,r0; or r0,r0; or r0,r0 +# else +# define SYSCALL_INST_PAD +# endif + +#define SYSCALL_INST0 trapa #0x10 +#define SYSCALL_INST1 trapa #0x11 +#define SYSCALL_INST2 trapa #0x12 +#define SYSCALL_INST3 trapa #0x13 +#define SYSCALL_INST4 trapa #0x14 +#define SYSCALL_INST5 mov.l @(0,r15),r0; trapa #0x15 +#define SYSCALL_INST6 mov.l @(0,r15),r0; mov.l @(4,r15),r1; trapa #0x16 + +#undef DO_CALL +#define DO_CALL(syscall_name, args) \ + mov.l 1f,r3; \ + SYSCALL_INST##args; \ + SYSCALL_INST_PAD; \ + bra 2f; \ + nop; \ + .align 2; \ + 1: .long SYS_ify (syscall_name); \ + 2: + +#endif /* __ASSEMBLER__ */ + +#endif /* linux/sh/sysdep.h */ |