1/* 2 * QuickThreads -- Threads-building toolkit. 3 * Copyright (c) 1993 by David Keppel 4 * 5 * Permission to use, copy, modify and distribute this software and 6 * its documentation for any purpose and without fee is hereby 7 * granted, provided that the above copyright notice and this notice 8 * appear in all copies. This software is provided as a 9 * proof-of-concept and for demonstration purposes; there is no 10 * representation about the suitability of this software for any 11 * purpose. 12 */ 13 14#ifndef QUICKTHREADS_X86_64_H 15#define QUICKTHREADS_X86_64_H 16 17typedef unsigned long qt_word_t; 18 19/* Thread's initial stack layout on the iX86_64: 20 21 non-varargs: 22 23 +--- 24 | arg[2] === `userf' on startup 25 | arg[1] === `pt' on startup 26 | arg[0] === `pu' on startup 27 +--- 28 | ret pc === qt_error 29 +--- 30 | ret pc === `only' on startup 31 +--- 32 | %ebp 33 | %esi 34 | %edi 35 | %ebx <--- qt_t.sp 36 +--- 37 38 When a non-varargs thread is started, it ``returns'' directly to 39 the client's `only' function. 40 41 varargs: 42 43 +--- 44 | arg[n-1] 45 | .. 46 | arg[0] 47 +--- 48 | ret pc === `qt_vstart' 49 +--- 50 | %ebp === `startup' 51 | %esi === `cleanup' 52 | %edi === `pt' 53 | %ebx === `vuserf' <--- qt_t.sp 54 +--- 55 56 When a varargs thread is started, it ``returns'' to the `qt_vstart' 57 startup code. The startup code calls the appropriate functions. */ 58 59 60/* What to do to start a varargs thread running. */ 61extern void qt_vstart (void); 62 63 64/* Hold four return pcs (qt_error, qt_start and twice qt_align) 65 plus ten args and two qt_word_t's for correct alignment. */ 66#define QUICKTHREADS_STKBASE (16 * sizeof(long)) 67 68/* Hold 4 saved regs plus one return pc (qt_vstart). */ 69#define QUICKTHREADS_VSTKBASE (5 * sizeof(long)) 70 71 72/* Stack must be 16-byte aligned at function call instr. (SSE data support) */ 73#define QUICKTHREADS_STKALIGN (16) 74 75 76/* Where to place various arguments. */ 77#define QUICKTHREADS_ONLY_INDEX (QUICKTHREADS_PC) 78#define QUICKTHREADS_USER_INDEX (QUICKTHREADS_ARG2) 79#define QUICKTHREADS_ARGT_INDEX (QUICKTHREADS_ARG1) 80#define QUICKTHREADS_ARGU_INDEX (QUICKTHREADS_ARG0) 81 82#define QUICKTHREADS_VSTARTUP_INDEX (QUICKTHREADS_EBP) 83#define QUICKTHREADS_VUSERF_INDEX (QUICKTHREADS_EBX) 84#define QUICKTHREADS_VCLEANUP_INDEX (QUICKTHREADS_ESI) 85#define QUICKTHREADS_VARGT_INDEX (QUICKTHREADS_EDI) 86 87 88/* Stack layout offsets relative to stack at initial stack setup. */ 89 90/* Stack alignment 15 */ 91#define QUICKTHREADS_RPC 14 92#define QUICKTHREADS_POP0 13 93#define QUICKTHREADS_PC 12 94#define QUICKTHREADS_POP1 11 95#define QUICKTHREADS_RBP 10 96/* Stack alignment 9 */ 97#define QUICKTHREADS_R12 8 98#define QUICKTHREADS_R13 7 99#define QUICKTHREADS_R14 6 100#define QUICKTHREADS_R15 5 101#define QUICKTHREADS_RBX 4 102#define QUICKTHREADS_RCX 3 103#define QUICKTHREADS_RDX 2 104#define QUICKTHREADS_RDI 1 105#define QUICKTHREADS_RSI 0 106 107 108/* Arguments to save stack function. */ 109 110#define QUICKTHREADS_ARG0 QUICKTHREADS_RDI 111#define QUICKTHREADS_ARG1 QUICKTHREADS_RSI 112#define QUICKTHREADS_ARG2 QUICKTHREADS_RDX 113 114 115/* Stack grows down. The top of the stack is the first thing to 116 pop off (preincrement, postdecrement). */ 117#define QUICKTHREADS_GROW_DOWN 118 119extern void qt_error (void); 120extern void qt_align (void); /* For correct stack alignment */ 121 122/* Push on the error return address, force Frame Pointer to 0 and 123 push stack alignment trampoline function. */ 124#define QUICKTHREADS_ARGS_MD(sto) \ 125 (QUICKTHREADS_SPUT (sto, QUICKTHREADS_RBP, 0), \ 126 QUICKTHREADS_SPUT (sto, QUICKTHREADS_POP0, qt_align), \ 127 QUICKTHREADS_SPUT (sto, QUICKTHREADS_POP1, qt_align), \ 128 QUICKTHREADS_SPUT (sto, QUICKTHREADS_RPC, qt_error)) 129 130 131/* When varargs are pushed, allocate space for all the args. */ 132#define QUICKTHREADS_VARGS_MD0(sto, nbytes) \ 133 ((qt_t *)(((char *)(sto)) - QUICKTHREADS_STKROUNDUP(nbytes))) 134 135#define QUICKTHREADS_VARGS_MD1(sto) \ 136 (QUICKTHREADS_SPUT (sto, QUICKTHREADS_PC, qt_vstart)) 137 138#define QUICKTHREADS_VARGS_DEFAULT 139 140#endif /* QUICKTHREADS_X86_64_H */ 141