1 /* $NetBSD: mcontext.h,v 1.18 2018/02/15 15:53:56 kamil Exp $ */ 2 3 /*- 4 * Copyright (c) 2001 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Klaus Klein. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #ifndef _POWERPC_MCONTEXT_H_ 33 #define _POWERPC_MCONTEXT_H_ 34 35 /* 36 * Layout of mcontext_t based on the System V Application Binary Interface, 37 * Edition 4.1, PowerPC Processor ABI Supplement - September 1995, and 38 * extended for the AltiVec Register File. Note that due to the increased 39 * alignment requirements of the latter, the offset of mcontext_t within 40 * an ucontext_t is different from System V. 41 */ 42 43 #define _NGREG 39 /* GR0-31, CR, LR, SRR0, SRR1, CTR, XER, MQ */ 44 45 typedef long __greg_t; 46 typedef __greg_t __gregset_t[_NGREG]; 47 48 #define _REG_R0 0 49 #define _REG_R1 1 50 #define _REG_R2 2 51 #define _REG_R3 3 52 #define _REG_R4 4 53 #define _REG_R5 5 54 #define _REG_R6 6 55 #define _REG_R7 7 56 #define _REG_R8 8 57 #define _REG_R9 9 58 #define _REG_R10 10 59 #define _REG_R11 11 60 #define _REG_R12 12 61 #define _REG_R13 13 62 #define _REG_R14 14 63 #define _REG_R15 15 64 #define _REG_R16 16 65 #define _REG_R17 17 66 #define _REG_R18 18 67 #define _REG_R19 19 68 #define _REG_R20 20 69 #define _REG_R21 21 70 #define _REG_R22 22 71 #define _REG_R23 23 72 #define _REG_R24 24 73 #define _REG_R25 25 74 #define _REG_R26 26 75 #define _REG_R27 27 76 #define _REG_R28 28 77 #define _REG_R29 29 78 #define _REG_R30 30 79 #define _REG_R31 31 80 #define _REG_CR 32 /* Condition Register */ 81 #define _REG_LR 33 /* Link Register */ 82 #define _REG_PC 34 /* PC (copy of SRR0) */ 83 #define _REG_MSR 35 /* MSR (copy of SRR1) */ 84 #define _REG_CTR 36 /* Count Register */ 85 #define _REG_XER 37 /* Integer Exception Register */ 86 #define _REG_MQ 38 /* MQ Register (POWER only) */ 87 88 typedef struct { 89 #ifdef _KERNEL 90 unsigned long long __fpu_regs[32]; /* FP0-31 */ 91 #else 92 double __fpu_regs[32]; /* FP0-31 */ 93 #endif 94 unsigned int __fpu_fpscr; /* FP Status and Control Register */ 95 unsigned int __fpu_valid; /* Set together with _UC_FPU */ 96 } __fpregset_t; 97 98 #define _NVR 32 /* Number of Vector registers */ 99 100 typedef struct { 101 union __vr { 102 unsigned char __vr8[16]; 103 unsigned short __vr16[8]; 104 unsigned int __vr32[4]; 105 unsigned char __spe8[8]; 106 unsigned short __spe16[4]; 107 unsigned int __spe32[2]; 108 } __vrs[_NVR] __aligned(16); 109 unsigned int __vscr; /* VSCR */ 110 unsigned int __vrsave; /* VRSAVE */ 111 } __vrf_t; 112 113 typedef struct { 114 __gregset_t __gregs; /* General Purpose Register set */ 115 __fpregset_t __fpregs; /* Floating Point Register set */ 116 __vrf_t __vrf; /* Vector Register File */ 117 } mcontext_t; 118 119 #if defined(_LP64) 120 typedef int __greg32_t; 121 typedef __greg32_t __gregset32_t[_NGREG]; 122 123 typedef struct { 124 __gregset32_t __gregs; /* General Purpose Register set */ 125 __fpregset_t __fpregs; /* Floating Point Register set */ 126 __vrf_t __vrf; /* Vector Register File */ 127 } mcontext32_t; 128 #endif 129 130 /* Machine-dependent uc_flags */ 131 #define _UC_POWERPC_VEC 0x00010000 /* Vector Register File valid */ 132 #define _UC_POWERPC_SPE 0x00020000 /* Vector Register File valid */ 133 #define _UC_TLSBASE 0x00080000 /* thread context valid in R2 */ 134 135 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_R1]) 136 #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_R31]) 137 #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_PC]) 138 #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_R3]) 139 140 #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) 141 142 #if defined(_RTLD_SOURCE) || defined(_LIBC_SOURCE) || defined(__LIBPTHREAD_SOURCE__) 143 #include <sys/tls.h> 144 145 /* 146 * On PowerPC, since displacements are signed 16-bit values, the TCB Pointer 147 * is biased by 0x7000 + sizeof(tcb) so that first thread datum can be 148 * addressed by -28672 thereby leaving 60KB available for use as thread data. 149 */ 150 #define TLS_TP_OFFSET 0x7000 151 #define TLS_DTV_OFFSET 0x8000 152 __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000); 153 154 static __inline void * 155 __lwp_gettcb_fast(void) 156 { 157 void *__tcb; 158 159 __asm __volatile( 160 "addi %[__tcb],%%r2,%[__offset]" 161 : [__tcb] "=r" (__tcb) 162 : [__offset] "n" (-(TLS_TP_OFFSET + sizeof(struct tls_tcb)))); 163 164 return __tcb; 165 } 166 167 static __inline void 168 __lwp_settcb(void *__tcb) 169 { 170 __asm __volatile( 171 "addi %%r2,%[__tcb],%[__offset]" 172 : 173 : [__tcb] "r" (__tcb), 174 [__offset] "n" (TLS_TP_OFFSET + sizeof(struct tls_tcb))); 175 } 176 #endif /* _RTLD_SOURCE || _LIBC_SOURCE || __LIBPTHREAD_SOURCE__ */ 177 178 #endif /* !_POWERPC_MCONTEXT_H_ */ 179