/* $NetBSD: mcontext.h,v 1.21.10.3 2018/03/21 10:08:02 martin Exp $ */ /*- * Copyright (c) 1999, 2002 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Klaus Klein, and by Jason R. Thorpe of Wasabi Systems, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _MIPS_MCONTEXT_H_ #define _MIPS_MCONTEXT_H_ /* * General register state */ #define _NGREG 37 /* R0-R31, MDLO, MDHI, CAUSE, PC, SR */ #define _REG_R0 0 #define _REG_AT 1 #define _REG_V0 2 #define _REG_V1 3 #define _REG_A0 4 #define _REG_A1 5 #define _REG_A2 6 #define _REG_A3 7 #define _REG_T0 8 #define _REG_T1 9 #define _REG_T2 10 #define _REG_T3 11 #define _REG_T4 12 #define _REG_T5 13 #define _REG_T6 14 #define _REG_T7 15 #define _REG_S0 16 #define _REG_S1 17 #define _REG_S2 18 #define _REG_S3 19 #define _REG_S4 20 #define _REG_S5 21 #define _REG_S6 22 #define _REG_S7 23 #define _REG_T8 24 #define _REG_T9 25 #define _REG_K0 26 #define _REG_K1 27 #define _REG_GP 28 #define _REG_SP 29 #define _REG_S8 30 #define _REG_RA 31 /* XXX: The following conflict with */ #define _REG_MDLO 32 #define _REG_MDHI 33 #define _REG_CAUSE 34 #define _REG_EPC 35 #define _REG_SR 36 #ifndef __ASSEMBLER__ /* Make sure this is signed; we need pointers to be sign-extended. */ #if defined(__mips_n32) typedef long long __greg_t; #else typedef long __greg_t; #endif /* __mips_n32 */ typedef __greg_t __gregset_t[_NGREG]; /* * For the O32/O64 ABI, there are 16 doubles, one at each even FP reg * number. The FP registers themselves are 32-bits. * * For 64-bit ABIs (include N32), each FP register is a 64-bit double. */ typedef __greg_t __freg_t; /* * Floating point register state */ struct __fpregset_nabi { union { double __fp64_dregs[32]; __freg_t __fp_regs[32]; } __fp_r; __greg_t __fp_csr; }; struct __fpregset_oabi { union { double __fp_dregs[16]; float __fp_fregs[32]; __int32_t __fp_regs[32]; } __fp_r; unsigned int __fp_csr; unsigned int __fp_pad; }; #if __mips_n32 || __mips_n64 typedef struct __fpregset_nabi __fpregset_t; #else typedef struct __fpregset_oabi __fpregset_t; #endif typedef struct { __gregset_t __gregs; __fpregset_t __fpregs; __greg_t _mc_tlsbase; #if !__mips_n32 __greg_t __mc_unused; #endif } mcontext_t; #if defined(_KERNEL) && !defined(__mips_o32) typedef __int32_t __greg32_t; typedef __greg32_t __gregset32_t[_NGREG]; typedef struct { __gregset32_t __gregs; struct __fpregset_oabi __fpregs; __greg32_t _mc_tlsbase; __greg32_t __mc_unused; } mcontext_o32_t; typedef struct { __gregset_t __gregs; struct __fpregset_nabi __fpregs; __greg_t _mc_tlsbase; } mcontext32_t; #endif /* _KERNEL && _LP64 */ #endif /* !__ASSEMBLER__ */ #define _UC_MACHINE_PAD 14 /* Padding appended to ucontext_t */ #define _UC_SETSTACK 0x00010000 #define _UC_CLRSTACK 0x00020000 #define _UC_TLSBASE 0x00040000 #define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_SP]) #define _UC_MACHINE_FP(uc) ((uc)->uc_mcontext.__gregs[_REG_S8]) #define _UC_MACHINE_PC(uc) ((uc)->uc_mcontext.__gregs[_REG_EPC]) #define _UC_MACHINE_INTRV(uc) ((uc)->uc_mcontext.__gregs[_REG_V0]) #define _UC_MACHINE_SET_PC(uc, pc) _UC_MACHINE_PC(uc) = (pc) #define _UC_MACHINE32_SP(uc) _UC_MACHINE_SP(uc) #define _UC_MACHINE32_PC(uc) _UC_MACHINE_PC(uc) #define _UC_MACHINE32_INTRV(uc) _UC_MACHINE_INTRV(uc) #define _UC_MACHINE32_PAD 14 /* Padding appended to ucontext32_t */ #define _UC_MACHINE32_SET_PC(uc, pc) _UC_MACHINE_PC((uc), (pc)) #define __UCONTEXT_SIZE_O32 (40 + 296 + 56) /* 392 */ #define __UCONTEXT_SIZE_N32 (40 + 568 + 56) /* 664 */ #define __UCONTEXT_SIZE_N64 (56 + 576 + 112) /* 774 */ #ifdef __mips_o32 #define __UCONTEXT_SIZE __UCONTEXT_SIZE_O32 #elif __mips_n32 #define __UCONTEXT_SIZE __UCONTEXT_SIZE_N32 #elif __mips_n64 #define __UCONTEXT_SIZE __UCONTEXT_SIZE_N64 #define __UCONTEXT32_SIZE __UCONTEXT_SIZE_N32 #else #error O64 is not supported #endif #if defined(_LIBC_SOURCE) || defined(_RTLD_SOURCE) || defined(__LIBPTHREAD_SOURCE__) #define TLS_TP_OFFSET 0x7000 #define TLS_DTV_OFFSET 0x8000 #include __CTASSERT(TLS_TP_OFFSET + sizeof(struct tls_tcb) < 0x8000); __CTASSERT(TLS_TP_OFFSET % sizeof(struct tls_tcb) == 0); static __inline struct tls_tcb * __lwp_gettcb_fast(void) { struct tls_tcb *__tcb; /* * Only emit a rdhwr $3, $29 so the kernel can quickly emulate it. */ __asm __volatile( #if 1 // For some reason the syscall is much faster than // emulating rdhwr $3,$29 on a CN50xx "addiu $2,$0,316; syscall; nop; move %[__tcb],$2" #else ".set push" ";.set mips32r2" ";.p2align 4" ";ssnop" ";rdhwr $3,$29" ";ssnop" ";move %0,$3" ";.set pop" #endif : [__tcb]"=r"(__tcb) : : "v0", "v1", "a3"); return __tcb - (TLS_TP_OFFSET / sizeof(*__tcb) + 1); } void _lwp_setprivate(void *); static inline void __lwp_settcb(struct tls_tcb *__tcb) { __tcb += TLS_TP_OFFSET / sizeof(*__tcb) + 1; _lwp_setprivate(__tcb); } #endif #endif /* _MIPS_MCONTEXT_H_ */