/* Copyright (C) 2000, 2002, 2003, 2004, 2005 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. */ /* NPTL - start sysdeps/unix/mips32/sysdep.h */ /* NPTL - start sysdeps/unix/mips/sysdep.h */ #include /* NPTL - start sysdeps/unix/sysdep.h */ /* NPTL - start sysdeps/generic/sysdep.h */ /* Define a macro we can use to construct the asm name for a C symbol. */ #ifdef NO_UNDERSCORES #ifdef __STDC__ #define C_LABEL(name) name##: #else #define C_LABEL(name) name/**/: #endif #else #ifdef __STDC__ #define C_LABEL(name) _##name##: #else #define C_LABEL(name) _/**/name/**/: #endif #endif #ifdef __ASSEMBLER__ /* Mark the end of function named SYM. This is used on some platforms to generate correct debugging information. */ #ifndef END #define END(sym) #endif #ifndef JUMPTARGET #define JUMPTARGET(sym) sym #endif /* Makros to generate eh_frame unwind information. */ # ifdef HAVE_ASM_CFI_DIRECTIVES # define cfi_startproc .cfi_startproc # define cfi_endproc .cfi_endproc # define cfi_def_cfa(reg, off) .cfi_def_cfa reg, off # define cfi_def_cfa_register(reg) .cfi_def_cfa_register reg # define cfi_def_cfa_offset(off) .cfi_def_cfa_offset off # define cfi_adjust_cfa_offset(off) .cfi_adjust_cfa_offset off # define cfi_offset(reg, off) .cfi_offset reg, off # define cfi_rel_offset(reg, off) .cfi_rel_offset reg, off # define cfi_register(r1, r2) .cfi_register r1, r2 # define cfi_return_column(reg) .cfi_return_column reg # define cfi_restore(reg) .cfi_restore reg # define cfi_undefined(reg) .cfi_undefined reg # define cfi_remember_state .cfi_remember_state # define cfi_restore_state .cfi_restore_state # define cfi_window_save .cfi_window_save # else # define cfi_startproc # define cfi_endproc # define cfi_def_cfa(reg, off) # define cfi_def_cfa_register(reg) # define cfi_def_cfa_offset(off) # define cfi_adjust_cfa_offset(off) # define cfi_offset(reg, off) # define cfi_rel_offset(reg, off) # define cfi_register(r1, r2) # define cfi_return_column(reg) # define cfi_restore(reg) # define cfi_undefined(reg) # define cfi_remember_state # define cfi_restore_state # define cfi_window_save # endif #else /* ! ASSEMBLER */ # ifdef HAVE_ASM_CFI_DIRECTIVES # define CFI_STRINGIFY(Name) CFI_STRINGIFY2 (Name) # define CFI_STRINGIFY2(Name) #Name # define CFI_STARTPROC ".cfi_startproc" # define CFI_ENDPROC ".cfi_endproc" # define CFI_DEF_CFA(reg, off) \ ".cfi_def_cfa " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off) # define CFI_DEF_CFA_REGISTER(reg) \ ".cfi_def_cfa_register " CFI_STRINGIFY(reg) # define CFI_DEF_CFA_OFFSET(off) \ ".cfi_def_cfa_offset " CFI_STRINGIFY(off) # define CFI_ADJUST_CFA_OFFSET(off) \ ".cfi_adjust_cfa_offset " CFI_STRINGIFY(off) # define CFI_OFFSET(reg, off) \ ".cfi_offset " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off) # define CFI_REL_OFFSET(reg, off) \ ".cfi_rel_offset " CFI_STRINGIFY(reg) "," CFI_STRINGIFY(off) # define CFI_REGISTER(r1, r2) \ ".cfi_register " CFI_STRINGIFY(r1) "," CFI_STRINGIFY(r2) # define CFI_RETURN_COLUMN(reg) \ ".cfi_return_column " CFI_STRINGIFY(reg) # define CFI_RESTORE(reg) \ ".cfi_restore " CFI_STRINGIFY(reg) # define CFI_UNDEFINED(reg) \ ".cfi_undefined " CFI_STRINGIFY(reg) # define CFI_REMEMBER_STATE \ ".cfi_remember_state" # define CFI_RESTORE_STATE \ ".cfi_restore_state" # define CFI_WINDOW_SAVE \ ".cfi_window_save" # else # define CFI_STARTPROC # define CFI_ENDPROC # define CFI_DEF_CFA(reg, off) # define CFI_DEF_CFA_REGISTER(reg) # define CFI_DEF_CFA_OFFSET(off) # define CFI_ADJUST_CFA_OFFSET(off) # define CFI_OFFSET(reg, off) # define CFI_REL_OFFSET(reg, off) # define CFI_REGISTER(r1, r2) # define CFI_RETURN_COLUMN(reg) # define CFI_RESTORE(reg) # define CFI_UNDEFINED(reg) # define CFI_REMEMBER_STATE # define CFI_RESTORE_STATE # define CFI_WINDOW_SAVE # endif #endif /* __ASSEMBLER__ */ /* NPTL - end sysdeps/generic/sysdep.h */ #include #define HAVE_SYSCALLS #if 0 /* Note that using a `PASTE' macro loses. */ #ifdef __STDC__ #define SYSCALL__(name, args) PSEUDO (__##name, name, args) #else #define SYSCALL__(name, args) PSEUDO (__/**/name, name, args) #endif #define SYSCALL(name, args) PSEUDO (name, name, args) #endif /* Machine-dependent sysdep.h files are expected to define the macro PSEUDO (function_name, syscall_name) to emit assembly code to define the C-callable function FUNCTION_NAME to do system call SYSCALL_NAME. r0 and r1 are the system call outputs. MOVE(x, y) should be defined as an instruction such that "MOVE(r1, r0)" works. ret should be defined as the return instruction. */ #if 0 /* * NPTL - these are defined in 'include/bits/syscalls.h' and * 'include/bits/sysnum.h'. */ #ifdef __STDC__ #define SYS_ify(syscall_name) SYS_##syscall_name #else #define SYS_ify(syscall_name) SYS_/**/syscall_name #endif #endif /* Terminate a system call named SYM. This is used on some platforms to generate correct debugging information. */ #ifndef PSEUDO_END #define PSEUDO_END(sym) #endif #ifndef PSEUDO_END_NOERRNO #define PSEUDO_END_NOERRNO(sym) PSEUDO_END(sym) #endif #ifndef PSEUDO_END_ERRVAL #define PSEUDO_END_ERRVAL(sym) PSEUDO_END(sym) #endif /* Wrappers around system calls should normally inline the system call code. But sometimes it is not possible or implemented and we use this code. */ #define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args) /* NPTL - end sysdeps/unix/sysdep.h */ #ifdef __ASSEMBLER__ #include #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 #endif /* NPTL - end sysdeps/unix/mips/sysdep.h */ /* 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: 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: j __syscall_error; \ nop; \ ENTRY(name) \ .set noreorder; \ li v0, SYS_ify(syscall_name); \ syscall; \ .set reorder; \ bne a3, zero, 99b; \ L(syse1): #endif /* NPTL - end sysdeps/unix/mips32/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__ /* 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) ) \ { \ 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", "memory" #endif /* __ASSEMBLER__ */ #endif /* linux/mips/mips32/sysdep.h */