| /* |
| * QuickThreads -- Threads-building toolkit. |
| * Copyright (c) 1993 by David Keppel |
| * |
| * Permission to use, copy, modify and distribute this software and |
| * its documentation for any purpose and without fee is hereby |
| * granted, provided that the above copyright notice and this notice |
| * appear in all copies. This software is provided as a |
| * proof-of-concept and for demonstration purposes; there is no |
| * representation about the suitability of this software for any |
| * purpose. |
| */ |
| |
| #ifndef QUICKTHREADS_X86_64_H |
| #define QUICKTHREADS_X86_64_H |
| |
| typedef unsigned long qt_word_t; |
| |
| /* Thread's initial stack layout on the iX86_64: |
| |
| non-varargs: |
| |
| +--- |
| | arg[2] === `userf' on startup |
| | arg[1] === `pt' on startup |
| | arg[0] === `pu' on startup |
| +--- |
| | ret pc === qt_error |
| +--- |
| | ret pc === `only' on startup |
| +--- |
| | %ebp |
| | %esi |
| | %edi |
| | %ebx <--- qt_t.sp |
| +--- |
| |
| When a non-varargs thread is started, it ``returns'' directly to |
| the client's `only' function. |
| |
| varargs: |
| |
| +--- |
| | arg[n-1] |
| | .. |
| | arg[0] |
| +--- |
| | ret pc === `qt_vstart' |
| +--- |
| | %ebp === `startup' |
| | %esi === `cleanup' |
| | %edi === `pt' |
| | %ebx === `vuserf' <--- qt_t.sp |
| +--- |
| |
| When a varargs thread is started, it ``returns'' to the `qt_vstart' |
| startup code. The startup code calls the appropriate functions. */ |
| |
| |
| /* What to do to start a varargs thread running. */ |
| extern void qt_vstart (void); |
| |
| |
| /* Hold four return pcs (qt_error, qt_start and twice qt_align) |
| plus ten args and two qt_word_t's for correct alignment. */ |
| #define QUICKTHREADS_STKBASE (16 * sizeof(long)) |
| |
| /* Hold 4 saved regs plus one return pc (qt_vstart). */ |
| #define QUICKTHREADS_VSTKBASE (5 * sizeof(long)) |
| |
| |
| /* Stack must be 16-byte aligned at function call instr. (SSE data support) */ |
| #define QUICKTHREADS_STKALIGN (16) |
| |
| |
| /* Where to place various arguments. */ |
| #define QUICKTHREADS_ONLY_INDEX (QUICKTHREADS_PC) |
| #define QUICKTHREADS_USER_INDEX (QUICKTHREADS_ARG2) |
| #define QUICKTHREADS_ARGT_INDEX (QUICKTHREADS_ARG1) |
| #define QUICKTHREADS_ARGU_INDEX (QUICKTHREADS_ARG0) |
| |
| #define QUICKTHREADS_VSTARTUP_INDEX (QUICKTHREADS_EBP) |
| #define QUICKTHREADS_VUSERF_INDEX (QUICKTHREADS_EBX) |
| #define QUICKTHREADS_VCLEANUP_INDEX (QUICKTHREADS_ESI) |
| #define QUICKTHREADS_VARGT_INDEX (QUICKTHREADS_EDI) |
| |
| |
| /* Stack layout offsets relative to stack at initial stack setup. */ |
| |
| /* Stack alignment 15 */ |
| #define QUICKTHREADS_RPC 14 |
| #define QUICKTHREADS_POP0 13 |
| #define QUICKTHREADS_PC 12 |
| #define QUICKTHREADS_POP1 11 |
| #define QUICKTHREADS_RBP 10 |
| /* Stack alignment 9 */ |
| #define QUICKTHREADS_R12 8 |
| #define QUICKTHREADS_R13 7 |
| #define QUICKTHREADS_R14 6 |
| #define QUICKTHREADS_R15 5 |
| #define QUICKTHREADS_RBX 4 |
| #define QUICKTHREADS_RCX 3 |
| #define QUICKTHREADS_RDX 2 |
| #define QUICKTHREADS_RDI 1 |
| #define QUICKTHREADS_RSI 0 |
| |
| |
| /* Arguments to save stack function. */ |
| |
| #define QUICKTHREADS_ARG0 QUICKTHREADS_RDI |
| #define QUICKTHREADS_ARG1 QUICKTHREADS_RSI |
| #define QUICKTHREADS_ARG2 QUICKTHREADS_RDX |
| |
| |
| /* Stack grows down. The top of the stack is the first thing to |
| pop off (preincrement, postdecrement). */ |
| #define QUICKTHREADS_GROW_DOWN |
| |
| extern void qt_error (void); |
| extern void qt_align (void); /* For correct stack alignment */ |
| |
| /* Push on the error return address, force Frame Pointer to 0 and |
| push stack alignment trampoline function. */ |
| #define QUICKTHREADS_ARGS_MD(sto) \ |
| (QUICKTHREADS_SPUT (sto, QUICKTHREADS_RBP, 0), \ |
| QUICKTHREADS_SPUT (sto, QUICKTHREADS_POP0, qt_align), \ |
| QUICKTHREADS_SPUT (sto, QUICKTHREADS_POP1, qt_align), \ |
| QUICKTHREADS_SPUT (sto, QUICKTHREADS_RPC, qt_error)) |
| |
| |
| /* When varargs are pushed, allocate space for all the args. */ |
| #define QUICKTHREADS_VARGS_MD0(sto, nbytes) \ |
| ((qt_t *)(((char *)(sto)) - QUICKTHREADS_STKROUNDUP(nbytes))) |
| |
| #define QUICKTHREADS_VARGS_MD1(sto) \ |
| (QUICKTHREADS_SPUT (sto, QUICKTHREADS_PC, qt_vstart)) |
| |
| #define QUICKTHREADS_VARGS_DEFAULT |
| |
| #endif /* QUICKTHREADS_X86_64_H */ |