pthread_md.h revision 1.10
1 /* $NetBSD: pthread_md.h,v 1.10 2007/09/24 12:19:40 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2001, 2007 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, and by Andrew Doran. 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 #include <sys/ucontext.h> 43 #include <ucontext.h> 44 45 extern int (*_md_getcontext_u)(ucontext_t *); 46 extern int (*_md_setcontext_u)(const ucontext_t *); 47 extern int (*_md_swapcontext_u)(ucontext_t *, const ucontext_t *); 48 49 #define _getcontext_u(uc) (*_md_getcontext_u)((uc)) 50 #define _setcontext_u(uc) (*_md_setcontext_u)((uc)) 51 #define _swapcontext_u(ouc, nuc) (*_md_swapcontext_u)((ouc), (nuc)) 52 53 int _getcontext_u_s87(ucontext_t *); 54 int _setcontext_u_s87(const ucontext_t *); 55 int _swapcontext_u_s87(ucontext_t *, const ucontext_t *); 56 int _getcontext_u_xmm(ucontext_t *); 57 int _setcontext_u_xmm(const ucontext_t *); 58 int _swapcontext_u_xmm(ucontext_t *, const ucontext_t *); 59 60 void pthread__i386_init(void); 61 62 #define PTHREAD_MD_INIT pthread__i386_init(); 63 64 static inline long 65 pthread__sp(void) 66 { 67 long ret; 68 __asm("movl %%esp, %0" : "=g" (ret)); 69 70 return ret; 71 } 72 73 #define pthread__uc_sp(ucp) ((ucp)->uc_mcontext.__gregs[_REG_UESP]) 74 #define pthread__uc_pc(ucp) ((ucp)->uc_mcontext.__gregs[_REG_EIP]) 75 76 /* 77 * Set initial, sane values for registers whose values aren't just 78 * "don't care". 79 * 80 * We use the current context instead of a guessed one because we cannot 81 * assume how the GDT entries are ordered: what is true on i386 is not 82 * true anymore on amd64. 83 */ 84 #define _INITCONTEXT_U_MD(ucp) \ 85 do { \ 86 ucontext_t ucur; \ 87 (void)getcontext(&ucur); \ 88 (ucp)->uc_mcontext.__gregs[_REG_GS] = \ 89 ucur.uc_mcontext.__gregs[_REG_GS], \ 90 (ucp)->uc_mcontext.__gregs[_REG_FS] = \ 91 ucur.uc_mcontext.__gregs[_REG_FS], \ 92 (ucp)->uc_mcontext.__gregs[_REG_ES] = \ 93 ucur.uc_mcontext.__gregs[_REG_ES], \ 94 (ucp)->uc_mcontext.__gregs[_REG_DS] = \ 95 ucur.uc_mcontext.__gregs[_REG_DS], \ 96 (ucp)->uc_mcontext.__gregs[_REG_CS] = \ 97 ucur.uc_mcontext.__gregs[_REG_CS], \ 98 (ucp)->uc_mcontext.__gregs[_REG_SS] = \ 99 ucur.uc_mcontext.__gregs[_REG_SS], \ 100 (ucp)->uc_mcontext.__gregs[_REG_EFL] = \ 101 ucur.uc_mcontext.__gregs[_REG_EFL]; \ 102 } while (/*CONSTCOND*/0); 103 104 /* 105 * Usable stack space below the ucontext_t. 106 * See comment in pthread_switch.S about STACK_SWITCH. 107 */ 108 #define STACKSPACE 32 /* room for 8 integer values */ 109 110 /* 111 * Conversions between struct reg and struct mcontext. Used by 112 * libpthread_dbg. 113 */ 114 115 #define PTHREAD_UCONTEXT_TO_REG(reg, uc) do { \ 116 (reg)->r_gs = (uc)->uc_mcontext.__gregs[_REG_GS]; \ 117 (reg)->r_fs = (uc)->uc_mcontext.__gregs[_REG_FS]; \ 118 (reg)->r_es = (uc)->uc_mcontext.__gregs[_REG_ES]; \ 119 (reg)->r_ds = (uc)->uc_mcontext.__gregs[_REG_DS]; \ 120 (reg)->r_edi = (uc)->uc_mcontext.__gregs[_REG_EDI]; \ 121 (reg)->r_esi = (uc)->uc_mcontext.__gregs[_REG_ESI]; \ 122 (reg)->r_ebp = (uc)->uc_mcontext.__gregs[_REG_EBP]; \ 123 (reg)->r_ebx = (uc)->uc_mcontext.__gregs[_REG_EBX]; \ 124 (reg)->r_edx = (uc)->uc_mcontext.__gregs[_REG_EDX]; \ 125 (reg)->r_ecx = (uc)->uc_mcontext.__gregs[_REG_ECX]; \ 126 (reg)->r_eax = (uc)->uc_mcontext.__gregs[_REG_EAX]; \ 127 (reg)->r_eip = (uc)->uc_mcontext.__gregs[_REG_EIP]; \ 128 (reg)->r_cs = (uc)->uc_mcontext.__gregs[_REG_CS]; \ 129 (reg)->r_eflags = (uc)->uc_mcontext.__gregs[_REG_EFL]; \ 130 (reg)->r_esp = (uc)->uc_mcontext.__gregs[_REG_UESP]; \ 131 (reg)->r_ss = (uc)->uc_mcontext.__gregs[_REG_SS]; \ 132 } while (/*CONSTCOND*/0) 133 134 #define PTHREAD_REG_TO_UCONTEXT(uc, reg) do { \ 135 (uc)->uc_mcontext.__gregs[_REG_GS] = (reg)->r_gs; \ 136 (uc)->uc_mcontext.__gregs[_REG_FS] = (reg)->r_fs; \ 137 (uc)->uc_mcontext.__gregs[_REG_ES] = (reg)->r_es; \ 138 (uc)->uc_mcontext.__gregs[_REG_DS] = (reg)->r_ds; \ 139 (uc)->uc_mcontext.__gregs[_REG_EDI] = (reg)->r_edi; \ 140 (uc)->uc_mcontext.__gregs[_REG_ESI] = (reg)->r_esi; \ 141 (uc)->uc_mcontext.__gregs[_REG_EBP] = (reg)->r_ebp; \ 142 (uc)->uc_mcontext.__gregs[_REG_EBX] = (reg)->r_ebx; \ 143 (uc)->uc_mcontext.__gregs[_REG_EDX] = (reg)->r_edx; \ 144 (uc)->uc_mcontext.__gregs[_REG_ECX] = (reg)->r_ecx; \ 145 (uc)->uc_mcontext.__gregs[_REG_EAX] = (reg)->r_eax; \ 146 (uc)->uc_mcontext.__gregs[_REG_EIP] = (reg)->r_eip; \ 147 (uc)->uc_mcontext.__gregs[_REG_CS] = (reg)->r_cs; \ 148 (uc)->uc_mcontext.__gregs[_REG_EFL] = (reg)->r_eflags; \ 149 (uc)->uc_mcontext.__gregs[_REG_UESP]= (reg)->r_esp; \ 150 (uc)->uc_mcontext.__gregs[_REG_SS] = (reg)->r_ss; \ 151 /*LINTED precision loss */ \ 152 (uc)->uc_flags = ((uc)->uc_flags | _UC_CPU) & ~_UC_USER; \ 153 } while (/*CONSTCOND*/0) 154 155 156 #define PTHREAD_UCONTEXT_TO_FPREG(freg, uc) \ 157 (void)memcpy((freg)->__data, \ 158 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fpchip_state.__fp_state, \ 159 sizeof(struct fpreg)) 160 161 #define PTHREAD_FPREG_TO_UCONTEXT(uc, freg) do { \ 162 (void)memcpy( \ 163 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fpchip_state.__fp_state, \ 164 (freg)->__data, sizeof(struct fpreg)); \ 165 /*LINTED precision loss */ \ 166 (uc)->uc_flags = ((uc)->uc_flags | _UC_FPU) & ~_UC_USER; \ 167 } while (/*CONSTCOND*/0) 168 169 #define PTHREAD_UCONTEXT_XREG_FLAG _UC_FXSAVE 170 171 #define PTHREAD_UCONTEXT_TO_XREG(xreg, uc) \ 172 (void)memcpy((xreg), \ 173 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fp_xmm_state.__fp_xmm, \ 174 sizeof(struct xmmregs)) 175 176 #define PTHREAD_XREG_TO_UCONTEXT(uc, xreg) do { \ 177 (void)memcpy( \ 178 (uc)->uc_mcontext.__fpregs.__fp_reg_set.__fp_xmm_state.__fp_xmm, \ 179 (xreg), \ 180 sizeof(struct xmmregs)); \ 181 (uc)->uc_flags = ((uc)->uc_flags | _UC_FXSAVE) & ~_UC_USER; \ 182 } while (/*CONSTCOND*/0) 183 184 #define pthread__smt_pause() __asm __volatile("rep; nop" ::: "memory") 185 #define PTHREAD__HAVE_ATOMIC 186 187 #endif /* _LIB_PTHREAD_I386_MD_H */ 188
Indexes created Thu Oct 23 22:10:10 GMT 2025