1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_PARISC_UNISTD_H_ 3 #define _ASM_PARISC_UNISTD_H_ 4 5 #include <uapi/asm/unistd.h> 6 7 #define __NR_Linux_syscalls __NR_syscalls 8 9 #ifndef __ASSEMBLY__ 10 11 #define SYS_ify(syscall_name) __NR_##syscall_name 12 13 #define __IGNORE_select /* newselect */ 14 #define __IGNORE_fadvise64 /* fadvise64_64 */ 15 #define __IGNORE_pkey_mprotect 16 #define __IGNORE_pkey_alloc 17 #define __IGNORE_pkey_free 18 19 #ifndef ASM_LINE_SEP 20 # define ASM_LINE_SEP ; 21 #endif 22 23 /* Definition taken from glibc 2.3.3 24 * sysdeps/unix/sysv/linux/hppa/sysdep.h 25 */ 26 27 #ifdef PIC 28 /* WARNING: CANNOT BE USED IN A NOP! */ 29 # define K_STW_ASM_PIC " copy %%r19, %%r4\n" 30 # define K_LDW_ASM_PIC " copy %%r4, %%r19\n" 31 # define K_USING_GR4 "%r4", 32 #else 33 # define K_STW_ASM_PIC " \n" 34 # define K_LDW_ASM_PIC " \n" 35 # define K_USING_GR4 36 #endif 37 38 /* GCC has to be warned that a syscall may clobber all the ABI 39 registers listed as "caller-saves", see page 8, Table 2 40 in section 2.2.6 of the PA-RISC RUN-TIME architecture 41 document. However! r28 is the result and will conflict with 42 the clobber list so it is left out. Also the input arguments 43 registers r20 -> r26 will conflict with the list so they 44 are treated specially. Although r19 is clobbered by the syscall 45 we cannot say this because it would violate ABI, thus we say 46 r4 is clobbered and use that register to save/restore r19 47 across the syscall. */ 48 49 #define K_CALL_CLOB_REGS "%r1", "%r2", K_USING_GR4 \ 50 "%r20", "%r29", "%r31" 51 52 #undef K_INLINE_SYSCALL 53 #define K_INLINE_SYSCALL(name, nr, args...) ({ \ 54 long __sys_res; \ 55 { \ 56 register unsigned long __res __asm__("r28"); \ 57 K_LOAD_ARGS_##nr(args) \ 58 /* FIXME: HACK stw/ldw r19 around syscall */ \ 59 __asm__ volatile( \ 60 K_STW_ASM_PIC \ 61 " ble 0x100(%%sr2, %%r0)\n" \ 62 " ldi %1, %%r20\n" \ 63 K_LDW_ASM_PIC \ 64 : "=r" (__res) \ 65 : "i" (SYS_ify(name)) K_ASM_ARGS_##nr \ 66 : "memory", K_CALL_CLOB_REGS K_CLOB_ARGS_##nr \ 67 ); \ 68 __sys_res = (long)__res; \ 69 } \ 70 if ( (unsigned long)__sys_res >= (unsigned long)-4095 ){ \ 71 errno = -__sys_res; \ 72 __sys_res = -1; \ 73 } \ 74 __sys_res; \ 75 }) 76 77 #define K_LOAD_ARGS_0() 78 #define K_LOAD_ARGS_1(r26) \ 79 register unsigned long __r26 __asm__("r26") = (unsigned long)(r26); \ 80 K_LOAD_ARGS_0() 81 #define K_LOAD_ARGS_2(r26,r25) \ 82 register unsigned long __r25 __asm__("r25") = (unsigned long)(r25); \ 83 K_LOAD_ARGS_1(r26) 84 #define K_LOAD_ARGS_3(r26,r25,r24) \ 85 register unsigned long __r24 __asm__("r24") = (unsigned long)(r24); \ 86 K_LOAD_ARGS_2(r26,r25) 87 #define K_LOAD_ARGS_4(r26,r25,r24,r23) \ 88 register unsigned long __r23 __asm__("r23") = (unsigned long)(r23); \ 89 K_LOAD_ARGS_3(r26,r25,r24) 90 #define K_LOAD_ARGS_5(r26,r25,r24,r23,r22) \ 91 register unsigned long __r22 __asm__("r22") = (unsigned long)(r22); \ 92 K_LOAD_ARGS_4(r26,r25,r24,r23) 93 #define K_LOAD_ARGS_6(r26,r25,r24,r23,r22,r21) \ 94 register unsigned long __r21 __asm__("r21") = (unsigned long)(r21); \ 95 K_LOAD_ARGS_5(r26,r25,r24,r23,r22) 96 97 /* Even with zero args we use r20 for the syscall number */ 98 #define K_ASM_ARGS_0 99 #define K_ASM_ARGS_1 K_ASM_ARGS_0, "r" (__r26) 100 #define K_ASM_ARGS_2 K_ASM_ARGS_1, "r" (__r25) 101 #define K_ASM_ARGS_3 K_ASM_ARGS_2, "r" (__r24) 102 #define K_ASM_ARGS_4 K_ASM_ARGS_3, "r" (__r23) 103 #define K_ASM_ARGS_5 K_ASM_ARGS_4, "r" (__r22) 104 #define K_ASM_ARGS_6 K_ASM_ARGS_5, "r" (__r21) 105 106 /* The registers not listed as inputs but clobbered */ 107 #define K_CLOB_ARGS_6 108 #define K_CLOB_ARGS_5 K_CLOB_ARGS_6, "%r21" 109 #define K_CLOB_ARGS_4 K_CLOB_ARGS_5, "%r22" 110 #define K_CLOB_ARGS_3 K_CLOB_ARGS_4, "%r23" 111 #define K_CLOB_ARGS_2 K_CLOB_ARGS_3, "%r24" 112 #define K_CLOB_ARGS_1 K_CLOB_ARGS_2, "%r25" 113 #define K_CLOB_ARGS_0 K_CLOB_ARGS_1, "%r26" 114 115 #define _syscall0(type,name) \ 116 type name(void) \ 117 { \ 118 return K_INLINE_SYSCALL(name, 0); \ 119 } 120 121 #define _syscall1(type,name,type1,arg1) \ 122 type name(type1 arg1) \ 123 { \ 124 return K_INLINE_SYSCALL(name, 1, arg1); \ 125 } 126 127 #define _syscall2(type,name,type1,arg1,type2,arg2) \ 128 type name(type1 arg1, type2 arg2) \ 129 { \ 130 return K_INLINE_SYSCALL(name, 2, arg1, arg2); \ 131 } 132 133 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \ 134 type name(type1 arg1, type2 arg2, type3 arg3) \ 135 { \ 136 return K_INLINE_SYSCALL(name, 3, arg1, arg2, arg3); \ 137 } 138 139 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \ 140 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \ 141 { \ 142 return K_INLINE_SYSCALL(name, 4, arg1, arg2, arg3, arg4); \ 143 } 144 145 /* select takes 5 arguments */ 146 #define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \ 147 type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) \ 148 { \ 149 return K_INLINE_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5); \ 150 } 151 152 #define __ARCH_WANT_NEW_STAT 153 #define __ARCH_WANT_OLD_READDIR 154 #define __ARCH_WANT_STAT64 155 #define __ARCH_WANT_SYS_ALARM 156 #define __ARCH_WANT_SYS_GETHOSTNAME 157 #define __ARCH_WANT_SYS_PAUSE 158 #define __ARCH_WANT_SYS_SIGNAL 159 #define __ARCH_WANT_SYS_TIME 160 #define __ARCH_WANT_COMPAT_SYS_TIME 161 #define __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL 162 #define __ARCH_WANT_SYS_UTIME 163 #define __ARCH_WANT_SYS_UTIME32 164 #define __ARCH_WANT_SYS_WAITPID 165 #define __ARCH_WANT_SYS_SOCKETCALL 166 #define __ARCH_WANT_SYS_FADVISE64 167 #define __ARCH_WANT_SYS_GETPGRP 168 #define __ARCH_WANT_SYS_NICE 169 #define __ARCH_WANT_SYS_OLDUMOUNT 170 #define __ARCH_WANT_SYS_SIGPENDING 171 #define __ARCH_WANT_SYS_SIGPROCMASK 172 #define __ARCH_WANT_SYS_FORK 173 #define __ARCH_WANT_SYS_VFORK 174 #define __ARCH_WANT_SYS_CLONE 175 #define __ARCH_WANT_COMPAT_SYS_SENDFILE 176 177 #endif /* __ASSEMBLY__ */ 178 179 #undef STR 180 181 #endif /* _ASM_PARISC_UNISTD_H_ */ 182