RTEMS: cpukit/score/cpu/x86_64/include/rtems/asm.h Source File

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asm.h
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1
16/*
17 * COPYRIGHT:
18 *
19 * This file is based on similar code found in newlib available
20 * from ftp.cygnus.com. The file which was used had no copyright
21 * notice. This file is freely distributable as long as the source
22 * of the file is noted. This file is:
23 *
24 * COPYRIGHT (c) 2018.
25 * Amaan Cheval <amaan.cheval@gmail.com>
26 *
27 * COPYRIGHT (c) 1994-2006.
28 * On-Line Applications Research Corporation (OAR).
29 */
30
31#ifndef _RTEMS_ASM_H
32#define _RTEMS_ASM_H
33
34/*
35 * Indicate we are in an assembly file and get the basic CPU definitions.
36 */
37
38#ifndef ASM
39#define ASM
40#endif
41#include <rtems/score/cpuopts.h>
42#include <rtems/score/x86_64.h>
43
54#ifndef __USER_LABEL_PREFIX__
63#define __USER_LABEL_PREFIX__ _
64#endif
65
66#undef __REGISTER_PREFIX__
67#define __REGISTER_PREFIX__ %
68
69#include <rtems/concat.h>
70
72#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
73
75#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
76
77/*
78 * define macros for all of the registers on this CPU
79 */
80#define rax REG (rax)
81#define rbx REG (rbx)
82#define rcx REG (rcx)
83#define rdx REG (rdx)
84#define rdi REG (rdi)
85#define rsi REG (rsi)
86#define rbp REG (rbp)
87#define rsp REG (rsp)
88#define r8 REG (r8)
89#define r9 REG (r9)
90#define r10 REG (r10)
91#define r11 REG (r11)
92#define r12 REG (r12)
93#define r13 REG (r13)
94#define r14 REG (r14)
95#define r15 REG (r15)
96
97/*
98 * Order of register usage for function arguments as per the calling convention
99 */
100#define REG_ARG0 rdi
101#define REG_ARG1 rsi
102#define REG_ARG2 rdx
103#define REG_ARG3 rcx
104#define REG_ARG4 r8
105#define REG_ARG5 r9
106
107// XXX: eax, ax, etc., segment registers
108
109/*
110 * Define macros to handle section beginning and ends.
111 */
112
114#define BEGIN_CODE_DCL .text
116#define END_CODE_DCL
118#define BEGIN_DATA_DCL .data
120#define END_DATA_DCL
122#define BEGIN_CODE .text
124#define END_CODE
126#define BEGIN_DATA
128#define END_DATA
132#define BEGIN_BSS
134#define END_BSS
136#define END
137
144#define PUBLIC(sym) .globl SYM (sym)
145
152#define EXTERN(sym) .globl SYM (sym)
153
154#endif
155
concat.h