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 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 ``` ``````/** * @file rtems/asm.h * * @brief Addresses Incompatible Flavors Problems * * This include file attempts to address the problems * caused by incompatible flavors of assemblers and * toolsets. It primarily addresses variations in the * use of leading underscores on symbols and the requirement * that register names be preceded by a %. * * NOTE: The spacing in the use of these macros * is critical to them working as advertised. */ /* * COPYRIGHT: * * This file is based on similar code found in newlib available * from ftp.cygnus.com. The file which was used had no copyright * notice. This file is freely distributable as long as the source * of the file is noted. This file is: * * COPYRIGHT (c) 2018. * Amaan Cheval * * COPYRIGHT (c) 1994-2006. * On-Line Applications Research Corporation (OAR). */ #ifndef _RTEMS_ASM_H #define _RTEMS_ASM_H /* * Indicate we are in an assembly file and get the basic CPU definitions. */ #ifndef ASM #define ASM #endif #include #include #ifndef __USER_LABEL_PREFIX__ /** * Recent versions of GNU cpp define variables which indicate the * need for underscores and percents. If not using GNU cpp or * the version does not support this, then you will obviously * have to define these as appropriate. * * This symbol is prefixed to all C program symbols. */ #define __USER_LABEL_PREFIX__ _ #endif #undef __REGISTER_PREFIX__ #define __REGISTER_PREFIX__ % #include /** Use the right prefix for global labels. */ #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) /** Use the right prefix for registers. */ #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) /* * define macros for all of the registers on this CPU */ #define rax REG (rax) #define rbx REG (rbx) #define rcx REG (rcx) #define rdx REG (rdx) #define rdi REG (rdi) #define rsi REG (rsi) #define rbp REG (rbp) #define rsp REG (rsp) #define r8 REG (r8) #define r9 REG (r9) #define r10 REG (r10) #define r11 REG (r11) #define r12 REG (r12) #define r13 REG (r13) #define r14 REG (r14) #define r15 REG (r15) // XXX: eax, ax, etc., segment registers /* * Define macros to handle section beginning and ends. */ /** This macro is used to denote the beginning of a code declaration. */ #define BEGIN_CODE_DCL .text /** This macro is used to denote the end of a code declaration. */ #define END_CODE_DCL /** This macro is used to denote the beginning of a data declaration section. */ #define BEGIN_DATA_DCL .data /** This macro is used to denote the end of a data declaration section. */ #define END_DATA_DCL /** This macro is used to denote the beginning of a code section. */ #define BEGIN_CODE .text /** This macro is used to denote the end of a code section. */ #define END_CODE /** This macro is used to denote the beginning of a data section. */ #define BEGIN_DATA /** This macro is used to denote the end of a data section. */ #define END_DATA /** This macro is used to denote the beginning of the * unitialized data section. */ #define BEGIN_BSS /** This macro is used to denote the end of the unitialized data section. */ #define END_BSS /** This macro is used to denote the end of the assembly file. */ #define END /** * This macro is used to declare a public global symbol. * * @note This must be tailored for a particular flavor of the C compiler. * They may need to put underscores in front of the symbols. */ #define PUBLIC(sym) .globl SYM (sym) /** * This macro is used to prototype a public global symbol. * * @note This must be tailored for a particular flavor of the C compiler. * They may need to put underscores in front of the symbols. */ #define EXTERN(sym) .globl SYM (sym) #endif ``````