pthread_md.h revision 1.1.2.9
1 /* $NetBSD: pthread_md.h,v 1.1.2.9 2002/12/06 21:22:39 nathanw 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 Nathan J. Williams. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #ifndef _LIB_PTHREAD_I386_MD_H 40 #define _LIB_PTHREAD_I386_MD_H 41 42 extern int (*_md_getcontext_u)(ucontext_t *); 43 extern int (*_md_setcontext_u)(const ucontext_t *); 44 extern int (*_md_swapcontext_u)(ucontext_t *, const ucontext_t *); 45 46 #define _getcontext_u(uc) (*_md_getcontext_u)((uc)) 47 #define _setcontext_u(uc) (*_md_setcontext_u)((uc)) 48 #define _swapcontext_u(ouc, nuc) (*_md_swapcontext_u)((ouc), (nuc)) 49 50 int _getcontext_u_s87(ucontext_t *); 51 int _setcontext_u_s87(const ucontext_t *); 52 int _swapcontext_u_s87(ucontext_t *, const ucontext_t *); 53 int _getcontext_u_xmm(ucontext_t *); 54 int _setcontext_u_xmm(const ucontext_t *); 55 int _swapcontext_u_xmm(ucontext_t *, const ucontext_t *); 56 57 void pthread__i386_init(void); 58 59 #define PTHREAD_MD_INIT pthread__i386_init(); 60 61 static __inline long 62 pthread__sp(void) 63 { 64 long ret; 65 __asm("movl %%esp, %0" : "=g" (ret)); 66 67 return ret; 68 } 69 70 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_UESP]) 71 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_EIP]) 72 73 /* 74 * Set initial, sane values for registers whose values aren't just 75 * "don't care". 76 * 0x2b is GSEL(GUDATA_SEL, SEL_UPL), and 77 * 0x23 is GSEL(GUCODE_SEL, SEL_UPL), from arch/i386/include/segments.h. 78 * 0x202 is PSL_USERSET from arch/i386/include/psl.h 79 */ 80 #define _INITCONTEXT_U_MD(ucp) \ 81 (ucp)->uc_mcontext.__gregs[_REG_GS] = 0x2b; \ 82 (ucp)->uc_mcontext.__gregs[_REG_FS] = 0x2b; \ 83 (ucp)->uc_mcontext.__gregs[_REG_ES] = 0x2b; \ 84 (ucp)->uc_mcontext.__gregs[_REG_DS] = 0x2b; \ 85 (ucp)->uc_mcontext.__gregs[_REG_CS] = 0x23; \ 86 (ucp)->uc_mcontext.__gregs[_REG_SS] = 0x2b; \ 87 (ucp)->uc_mcontext.__gregs[_REG_EFL] = 0x202; 88 89 /* 90 * Usable stack space below the ucontext_t. 91 * See comment in pthread_switch.S about STACK_SWITCH. 92 */ 93 #define STACKSPACE 32 /* room for 8 integer values */ 94 95 /* 96 * Conversions between struct reg and struct mcontext. Used by 97 * libpthread_dbg. 98 */ 99 100 #define PTHREAD_UCONTEXT_TO_REG(reg, uc) do { \ 101 (reg)->r_gs = (uc)->uc_mcontext.__gregs[_REG_GS]; \ 102 (reg)->r_fs = (uc)->uc_mcontext.__gregs[_REG_FS]; \ 103 (reg)->r_es = (uc)->uc_mcontext.__gregs[_REG_ES]; \ 104 (reg)->r_ds = (uc)->uc_mcontext.__gregs[_REG_DS]; \ 105 (reg)->r_edi = (uc)->uc_mcontext.__gregs[_REG_EDI]; \ 106 (reg)->r_esi = (uc)->uc_mcontext.__gregs[_REG_ESI]; \ 107 (reg)->r_ebp = (uc)->uc_mcontext.__gregs[_REG_EBP]; \ 108 (reg)->r_ebx = (uc)->uc_mcontext.__gregs[_REG_EBX]; \ 109 (reg)->r_edx = (uc)->uc_mcontext.__gregs[_REG_EDX]; \ 110 (reg)->r_ecx = (uc)->uc_mcontext.__gregs[_REG_ECX]; \ 111 (reg)->r_eax = (uc)->uc_mcontext.__gregs[_REG_EAX]; \ 112 (reg)->r_eip = (uc)->uc_mcontext.__gregs[_REG_EIP]; \ 113 (reg)->r_cs = (uc)->uc_mcontext.__gregs[_REG_CS]; \ 114 (reg)->r_eflags = (uc)->uc_mcontext.__gregs[_REG_EFL]; \ 115 (reg)->r_esp = (uc)->uc_mcontext.__gregs[_REG_UESP]; \ 116 (reg)->r_ss = (uc)->uc_mcontext.__gregs[_REG_SS]; \ 117 } while (/*CONSTCOND*/0) 118 119 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do { \ 120 (uc)->uc_mcontext.__gregs[_REG_GS] = (reg)->r_gs; \ 121 (uc)->uc_mcontext.__gregs[_REG_FS] = (reg)->r_fs; \ 122 (uc)->uc_mcontext.__gregs[_REG_ES] = (reg)->r_es; \ 123 (uc)->uc_mcontext.__gregs[_REG_DS] = (reg)->r_ds; \ 124 (uc)->uc_mcontext.__gregs[_REG_EDI] = (reg)->r_edi; \ 125 (uc)->uc_mcontext.__gregs[_REG_ESI] = (reg)->r_esi; \ 126 (uc)->uc_mcontext.__gregs[_REG_EBP] = (reg)->r_ebp; \ 127 (uc)->uc_mcontext.__gregs[_REG_EBX] = (reg)->r_ebx; \ 128 (uc)->uc_mcontext.__gregs[_REG_EDX] = (reg)->r_edx; \ 129 (uc)->uc_mcontext.__gregs[_REG_ECX] = (reg)->r_ecx; \ 130 (uc)->uc_mcontext.__gregs[_REG_EAX] = (reg)->r_eax; \ 131 (uc)->uc_mcontext.__gregs[_REG_EIP] = (reg)->r_eip; \ 132 (uc)->uc_mcontext.__gregs[_REG_CS] = (reg)->r_cs; \ 133 (uc)->uc_mcontext.__gregs[_REG_EFL] = (reg)->r_eflags; \ 134 (uc)->uc_mcontext.__gregs[_REG_UESP]= (reg)->r_esp; \ 135 (uc)->uc_mcontext.__gregs[_REG_SS] = (reg)->r_ss; \ 136 (uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER; \ 137 } while (/*CONSTCOND*/0) 138 139 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) \ 140 memcpy((freg)->__data, \ 141 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fpchip_state.__fp_state, \ 142 sizeof(struct fpreg)) 143 144 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do { \ 145 memcpy( \ 146 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fpchip_state.__fp_state, \ 147 (freg)->__data, sizeof(struct fpreg)); \ 148 (uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER; \ 149 } while (/*CONSTCOND*/0) 150 151 152 #define PTHREAD_UCONTEXT_TO_SIGCONTEXT(uc, sc) do { \ 153 memcpy((sc), &(uc)->uc_mcontext.__gregs, 7 * sizeof (int)); \ 154 memcpy(&(sc)->sc_ebx, &(uc)->uc_mcontext.__gregs[_REG_EBX], \ 155 4 * sizeof (int)); \ 156 (sc)->sc_eip = (uc)->uc_mcontext.__gregs[_REG_EIP]; \ 157 (sc)->sc_cs = (uc)->uc_mcontext.__gregs[_REG_CS]; \ 158 (sc)->sc_eflags = (uc)->uc_mcontext.__gregs[_REG_EFL]; \ 159 (sc)->sc_esp = (uc)->uc_mcontext.__gregs[_REG_UESP]; \ 160 (sc)->sc_ss = (uc)->uc_mcontext.__gregs[_REG_SS]; \ 161 (sc)->sc_trapno = (uc)->uc_mcontext.__gregs[_REG_TRAPNO]; \ 162 (sc)->sc_err = (uc)->uc_mcontext.__gregs[_REG_ERR]; \ 163 } while (/*CONSTCOND*/0) 164 165 #define PTHREAD_SIGCONTEXT_TO_UCONTEXT(uc, sc) do { \ 166 memcpy(&(uc)->uc_mcontext.__gregs, (sc), 7 * sizeof (int)); \ 167 memcpy(&(uc)->uc_mcontext.__gregs[_REG_EBX], &(sc)->sc_ebx, \ 168 4 * sizeof (int)); \ 169 (uc)->uc_mcontext.__gregs[_REG_EIP] = (sc)->sc_eip; \ 170 (uc)->uc_mcontext.__gregs[_REG_CS] = (sc)->sc_cs; \ 171 (uc)->uc_mcontext.__gregs[_REG_EFL] = (sc)->sc_eflags; \ 172 (uc)->uc_mcontext.__gregs[_REG_UESP] = (sc)->sc_esp; \ 173 (uc)->uc_mcontext.__gregs[_REG_SS] = (sc)->sc_ss; \ 174 (uc)->uc_mcontext.__gregs[_REG_TRAPNO] = (sc)->sc_trapno; \ 175 (uc)->uc_mcontext.__gregs[_REG_ERR] = (sc)->sc_err; \ 176 (uc)->uc_flags &= ~_UC_USER; \ 177 } while (/*CONSTCOND*/0) 178 179 #endif /* _LIB_PTHREAD_I386_MD_H */ 180
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