| /* Copyright (C) 1992, 1995, 1997, 1999, 2000, 2002, 2003, 2004 |
| Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Brendan Kehoe (brendan@zen.org). |
| |
| 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_SYSDEP_H |
| #define _LINUX_MIPS_SYSDEP_H 1 |
| |
| #include <sgidefs.h> |
| #include <common/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 |
| #ifdef __STDC__ |
| # define SYS_ify(syscall_name) __NR_##syscall_name |
| #else |
| # define SYS_ify(syscall_name) __NR_/**/syscall_name |
| #endif |
| |
| #ifdef __ASSEMBLER__ |
| |
| #include <sys/regdef.h> |
| |
| #define ENTRY(name) \ |
| .globl name; \ |
| .align 2; \ |
| .ent name,0; \ |
| name##: |
| |
| #undef END |
| #define END(function) \ |
| .end function; \ |
| .size function,.-function |
| |
| #define ret j ra ; nop |
| |
| #undef PSEUDO_END |
| #define PSEUDO_END(sym) .end sym; .size sym,.-sym |
| |
| #define PSEUDO_NOERRNO(name, syscall_name, args) \ |
| .align 2; \ |
| ENTRY(name) \ |
| .set noreorder; \ |
| li v0, SYS_ify(syscall_name); \ |
| syscall |
| |
| #undef PSEUDO_END_NOERRNO |
| #define PSEUDO_END_NOERRNO(sym) .end sym; .size sym,.-sym |
| |
| #define ret_NOERRNO ret |
| |
| #define PSEUDO_ERRVAL(name, syscall_name, args) \ |
| .align 2; \ |
| ENTRY(name) \ |
| .set noreorder; \ |
| li v0, SYS_ify(syscall_name); \ |
| syscall |
| |
| #undef PSEUDO_END_ERRVAL |
| #define PSEUDO_END_ERRVAL(sym) .end sym; .size sym,.-sym |
| |
| #define ret_ERRVAL ret |
| |
| #define r0 v0 |
| #define r1 v1 |
| /* The mips move insn is d,s. */ |
| #define MOVE(x,y) move y , x |
| |
| #if _MIPS_SIM == _ABIO32 |
| # define L(label) $L ## label |
| #else |
| # define L(label) .L ## label |
| #endif |
| |
| /* Note that while it's better structurally, going back to call __syscall_error |
| can make things confusing if you're debugging---it looks like it's jumping |
| backwards into the previous fn. */ |
| |
| #ifdef __PIC__ |
| #define PSEUDO(name, syscall_name, args) \ |
| .align 2; \ |
| 99: move a0, v0; \ |
| la t9,__syscall_error; \ |
| jr t9; \ |
| ENTRY(name) \ |
| .set noreorder; \ |
| .cpload t9; \ |
| li v0, SYS_ify(syscall_name); \ |
| syscall; \ |
| .set reorder; \ |
| bne a3, zero, 99b; \ |
| L(syse1): |
| #else |
| #define PSEUDO(name, syscall_name, args) \ |
| .set noreorder; \ |
| .align 2; \ |
| 99: move a0, v0; \ |
| j __syscall_error; \ |
| nop; \ |
| ENTRY(name) \ |
| .set noreorder; \ |
| li v0, SYS_ify(syscall_name); \ |
| syscall; \ |
| .set reorder; \ |
| bne a3, zero, 99b; \ |
| L(syse1): |
| #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 99b |
| #endif |
| |
| #else /* ! __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) |
| #undef internal_syscall0 |
| #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; \ |
| }) |
| |
| #undef internal_syscall1 |
| #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; \ |
| }) |
| |
| #undef internal_syscall2 |
| #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; \ |
| }) |
| |
| #undef internal_syscall3 |
| #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; \ |
| }) |
| |
| #undef internal_syscall4 |
| #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) |
| |
| #undef internal_syscall5 |
| #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; \ |
| }) |
| |
| #undef internal_syscall6 |
| #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; \ |
| }) |
| |
| #undef internal_syscall7 |
| #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; \ |
| }) |
| |
| #undef __SYSCALL_CLOBBERS |
| #define __SYSCALL_CLOBBERS "$1", "$3", "$8", "$9", "$10", "$11", "$12", "$13", \ |
| "$14", "$15", "$24", "$25", "memory" |
| |
| /* Pointer mangling is not yet supported for MIPS. */ |
| #define PTR_MANGLE(var) (void) (var) |
| #define PTR_DEMANGLE(var) (void) (var) |
| |
| #endif /* __ASSEMBLER__ */ |
| #endif /* _LINUX_MIPS_SYSDEP_H */ |