/* Copyright (C) 2000, 2002, 2003, 2004, 2005, 2009 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _LINUX_MIPS_MIPS32_SYSDEP_H #define _LINUX_MIPS_MIPS32_SYSDEP_H 1 /* There is some commonality. */ #include #include /* In order to get __set_errno() definition in INLINE_SYSCALL. */ #ifndef __ASSEMBLER__ #include #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 #ifdef __STDC__ # define SYS_ify(syscall_name) __NR_##syscall_name #else # define SYS_ify(syscall_name) __NR_/**/syscall_name #endif #ifndef __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); \ long result_var = INTERNAL_SYSCALL (name, err, nr, args); \ if ( INTERNAL_SYSCALL_ERROR_P (result_var, err) ) \ { \ __set_errno (INTERNAL_SYSCALL_ERRNO (result_var, err)); \ result_var = -1L; \ } \ result_var; }) #undef INTERNAL_SYSCALL_DECL #define INTERNAL_SYSCALL_DECL(err) long err #undef INTERNAL_SYSCALL_ERROR_P #define INTERNAL_SYSCALL_ERROR_P(val, err) ((long) (err)) #undef INTERNAL_SYSCALL_ERRNO #define INTERNAL_SYSCALL_ERRNO(val, err) (val) #undef INTERNAL_SYSCALL #define INTERNAL_SYSCALL(name, err, nr, args...) \ internal_syscall##nr (, "li\t$2, %2\t\t\t# " #name "\n\t", \ "i" (SYS_ify (name)), err, args) #undef INTERNAL_SYSCALL_NCS #define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \ internal_syscall##nr (= number, , "r" (__v0), err, args) #define internal_syscall0(ncs_init, cs_init, input, err, dummy...) \ ({ \ long _sys_result; \ \ { \ register long __v0 asm("$2") ncs_init; \ register long __a3 asm("$7"); \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ cs_init \ "syscall\n\t" \ ".set reorder" \ : "=r" (__v0), "=r" (__a3) \ : input \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall1(ncs_init, cs_init, input, err, arg1) \ ({ \ long _sys_result; \ \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a3 asm("$7"); \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ cs_init \ "syscall\n\t" \ ".set reorder" \ : "=r" (__v0), "=r" (__a3) \ : input, "r" (__a0) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall2(ncs_init, cs_init, input, err, arg1, arg2) \ ({ \ long _sys_result; \ \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a3 asm("$7"); \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ cs_init \ "syscall\n\t" \ ".set\treorder" \ : "=r" (__v0), "=r" (__a3) \ : input, "r" (__a0), "r" (__a1) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall3(ncs_init, cs_init, input, err, arg1, arg2, arg3)\ ({ \ long _sys_result; \ \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a2 asm("$6") = (long) arg3; \ register long __a3 asm("$7"); \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ cs_init \ "syscall\n\t" \ ".set\treorder" \ : "=r" (__v0), "=r" (__a3) \ : input, "r" (__a0), "r" (__a1), "r" (__a2) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall4(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4)\ ({ \ long _sys_result; \ \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a2 asm("$6") = (long) arg3; \ register long __a3 asm("$7") = (long) arg4; \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ cs_init \ "syscall\n\t" \ ".set\treorder" \ : "=r" (__v0), "+r" (__a3) \ : input, "r" (__a0), "r" (__a1), "r" (__a2) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) /* We need to use a frame pointer for the functions in which we adjust $sp around the syscall, or debug information and unwind information will be $sp relative and thus wrong during the syscall. As of GCC 3.4.3, this is sufficient. */ #define FORCE_FRAME_POINTER alloca (4) #define internal_syscall5(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5)\ ({ \ long _sys_result; \ \ FORCE_FRAME_POINTER; \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a2 asm("$6") = (long) arg3; \ register long __a3 asm("$7") = (long) arg4; \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ "subu\t$29, 32\n\t" \ "sw\t%6, 16($29)\n\t" \ cs_init \ "syscall\n\t" \ "addiu\t$29, 32\n\t" \ ".set\treorder" \ : "=r" (__v0), "+r" (__a3) \ : input, "r" (__a0), "r" (__a1), "r" (__a2), \ "r" ((long)arg5) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall6(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6)\ ({ \ long _sys_result; \ \ FORCE_FRAME_POINTER; \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a2 asm("$6") = (long) arg3; \ register long __a3 asm("$7") = (long) arg4; \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ "subu\t$29, 32\n\t" \ "sw\t%6, 16($29)\n\t" \ "sw\t%7, 20($29)\n\t" \ cs_init \ "syscall\n\t" \ "addiu\t$29, 32\n\t" \ ".set\treorder" \ : "=r" (__v0), "+r" (__a3) \ : input, "r" (__a0), "r" (__a1), "r" (__a2), \ "r" ((long)arg5), "r" ((long)arg6) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define internal_syscall7(ncs_init, cs_init, input, err, arg1, arg2, arg3, arg4, arg5, arg6, arg7)\ ({ \ long _sys_result; \ \ FORCE_FRAME_POINTER; \ { \ register long __v0 asm("$2") ncs_init; \ register long __a0 asm("$4") = (long) arg1; \ register long __a1 asm("$5") = (long) arg2; \ register long __a2 asm("$6") = (long) arg3; \ register long __a3 asm("$7") = (long) arg4; \ __asm__ volatile ( \ ".set\tnoreorder\n\t" \ "subu\t$29, 32\n\t" \ "sw\t%6, 16($29)\n\t" \ "sw\t%7, 20($29)\n\t" \ "sw\t%8, 24($29)\n\t" \ cs_init \ "syscall\n\t" \ "addiu\t$29, 32\n\t" \ ".set\treorder" \ : "=r" (__v0), "+r" (__a3) \ : input, "r" (__a0), "r" (__a1), "r" (__a2), \ "r" ((long)arg5), "r" ((long)arg6), "r" ((long)arg7) \ : __SYSCALL_CLOBBERS); \ err = __a3; \ _sys_result = __v0; \ } \ _sys_result; \ }) #define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ "$14", "$15", "$24", "$25", "hi", "lo", "memory" #endif /* __ASSEMBLER__ */ /* Pointer mangling is not yet supported for MIPS. */ #define PTR_MANGLE(var) (void) (var) #define PTR_DEMANGLE(var) (void) (var) #endif /* linux/mips/mips32/sysdep.h */