/* Copyright (C) 1992, 93, 95-99, 2000 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, , August 1995. Changed by Kaz Kojima, . The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. 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 /* 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 _IMM12 #-12 #undef PSEUDO #ifdef SHARED #define PSEUDO(name, syscall_name, args) \ .text; \ ENTRY (name); \ DO_CALL (args, syscall_name); \ mov r0,r1; \ mov _IMM12,r2; \ shad r2,r1; \ not r1,r1; \ tst r1,r1; \ bf 1f; \ mov r0,r4; \ mov.l r12,@-r15; \ sts.l pr,@-r15; \ mov.l 0f,r12; \ mova 0f,r0; \ add r0,r12; \ mov.l 2f,r1; \ mova 2f,r0; \ add r0,r1; \ jsr @r1; \ nop; \ lds.l @r15+,pr; \ rts; \ mov.l @r15+,r12; \ .align 2; \ 2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \ 0: .long _GLOBAL_OFFSET_TABLE_; \ 1: #else #define PSEUDO(name, syscall_name, args) \ .text; \ ENTRY (name); \ DO_CALL (args, syscall_name); \ mov r0,r1; \ mov _IMM12,r2; \ shad r2,r1; \ not r1,r1; \ tst r1,r1; \ bf 1f; \ mov.l 2f,r1; \ jmp @r1; \ mov r0, r4; \ .align 2; \ 2: .long PLTJMP(C_SYMBOL_NAME(__syscall_error)); \ 1: #endif #undef PSEUDO_END #define PSEUDO_END(name) \ SYSCALL_ERROR_HANDLER \ END (name) #define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ #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(args, syscall_name) \ mov.l 1f,r3; \ SYSCALL_INST##args; \ bra 2f; \ nop; \ .align 2; \ 1: .long SYS_ify (syscall_name); \ 2: #else /* not __ASSEMBLER__ */ #define SYSCALL_INST_STR0 "trapa #0x10\n\t" #define SYSCALL_INST_STR1 "trapa #0x11\n\t" #define SYSCALL_INST_STR2 "trapa #0x12\n\t" #define SYSCALL_INST_STR3 "trapa #0x13\n\t" #define SYSCALL_INST_STR4 "trapa #0x14\n\t" #define SYSCALL_INST_STR5 "trapa #0x15\n\t" #define SYSCALL_INST_STR6 "trapa #0x16\n\t" #define ASMFMT_0 #define ASMFMT_1 \ , "r" (r4) #define ASMFMT_2 \ , "r" (r4), "r" (r5) #define ASMFMT_3 \ , "r" (r4), "r" (r5), "r" (r6) #define ASMFMT_4 \ , "r" (r4), "r" (r5), "r" (r6), "r" (r7) #define ASMFMT_5 \ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0) #define ASMFMT_6 \ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1) #define ASMFMT_7 \ , "r" (r4), "r" (r5), "r" (r6), "r" (r7), "0" (r0), "r" (r1), "r" (r2) #define SUBSTITUTE_ARGS_0() #define SUBSTITUTE_ARGS_1(arg1) \ register long r4 asm ("%r4") = (long)(arg1) #define SUBSTITUTE_ARGS_2(arg1, arg2) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2) #define SUBSTITUTE_ARGS_3(arg1, arg2, arg3) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2); \ register long r6 asm ("%r6") = (long)(arg3) #define SUBSTITUTE_ARGS_4(arg1, arg2, arg3, arg4) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2); \ register long r6 asm ("%r6") = (long)(arg3); \ register long r7 asm ("%r7") = (long)(arg4) #define SUBSTITUTE_ARGS_5(arg1, arg2, arg3, arg4, arg5) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2); \ register long r6 asm ("%r6") = (long)(arg3); \ register long r7 asm ("%r7") = (long)(arg4); \ register long r0 asm ("%r0") = (long)(arg5) #define SUBSTITUTE_ARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2); \ register long r6 asm ("%r6") = (long)(arg3); \ register long r7 asm ("%r7") = (long)(arg4); \ register long r0 asm ("%r0") = (long)(arg5); \ register long r1 asm ("%r1") = (long)(arg6) #define SUBSTITUTE_ARGS_7(arg1, arg2, arg3, arg4, arg5, arg6, arg7) \ register long r4 asm ("%r4") = (long)(arg1); \ register long r5 asm ("%r5") = (long)(arg2); \ register long r6 asm ("%r6") = (long)(arg3); \ register long r7 asm ("%r7") = (long)(arg4); \ register long r0 asm ("%r0") = (long)(arg5) \ register long r1 asm ("%r1") = (long)(arg6); \ register long r2 asm ("%r2") = (long)(arg7) #undef INLINE_SYSCALL #define INLINE_SYSCALL(name, nr, args...) \ ({ \ unsigned long resultvar; \ register long r3 asm ("%r3") = SYS_ify (name); \ SUBSTITUTE_ARGS_##nr(args); \ \ asm volatile (SYSCALL_INST_STR##nr \ : "=z" (resultvar) \ : "r" (r3) ASMFMT_##nr \ : "memory"); \ \ if (resultvar >= 0xfffff001) \ { \ __set_errno (-resultvar); \ resultvar = 0xffffffff; \ } \ (int) resultvar; }) #endif /* __ASSEMBLER__ */ #endif /* linux/sh/sysdep.h */