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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1126 | savelij | 1 | /* asmlabel.c */ |
| 2 | /*****************************************************************************/ |
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| 3 | /* SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only */ |
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| 4 | /* */ |
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| 5 | /* AS Port */ |
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| 6 | /* */ |
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| 7 | /* Handle Label on Source Line */ |
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| 8 | /* */ |
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| 9 | /*****************************************************************************/ |
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| 10 | |||
| 11 | /* ------------------------------------------------------------------------ |
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| 12 | * Includes |
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| 13 | * ------------------------------------------------------------------------ */ |
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| 14 | |||
| 15 | #include "stdinc.h" |
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| 16 | #include <string.h> |
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| 17 | |||
| 18 | #include "asmdef.h" |
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| 19 | #include "asmsub.h" |
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| 20 | #include "asmpars.h" |
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| 21 | #include "asmstructs.h" |
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| 22 | #include "strcomp.h" |
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| 23 | |||
| 24 | #include "asmlabel.h" |
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| 25 | |||
| 26 | /* ------------------------------------------------------------------------ |
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| 27 | * Local Variables |
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| 28 | * ------------------------------------------------------------------------ */ |
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| 29 | |||
| 30 | static PStructElem pLabelElement; |
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| 31 | static struct sSymbolEntry *pLabelEntry; |
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| 32 | static LargeWord LabelValue; |
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| 33 | |||
| 34 | /* ------------------------------------------------------------------------ |
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| 35 | * Global Functions |
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| 36 | * ------------------------------------------------------------------------ */ |
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| 37 | |||
| 38 | /*!------------------------------------------------------------------------ |
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| 39 | * \fn LabelReset(void) |
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| 40 | * \brief reset state about most recent label |
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| 41 | * ------------------------------------------------------------------------ */ |
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| 42 | |||
| 43 | void LabelReset(void) |
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| 44 | { |
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| 45 | pLabelElement = NULL; |
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| 46 | pLabelEntry = NULL; |
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| 47 | LabelValue = (LargeWord)-1; |
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| 48 | } |
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| 49 | |||
| 50 | /*!------------------------------------------------------------------------ |
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| 51 | * \fn LabelPresent(void) |
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| 52 | * \brief check whether line contains a label |
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| 53 | * \return True if label is present |
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| 54 | * ------------------------------------------------------------------------ */ |
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| 55 | |||
| 56 | Boolean LabelPresent(void) |
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| 57 | { |
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| 58 | if (!*LabPart.str.p_str) |
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| 59 | return False; |
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| 60 | if (IsDef()) |
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| 61 | return False; |
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| 62 | |||
| 63 | switch (*OpPart.str.p_str) |
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| 64 | { |
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| 65 | case '=': |
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| 66 | return !Memo("="); |
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| 67 | case ':': |
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| 68 | return !Memo(":="); |
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| 69 | case '.': |
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| 70 | return !Memo(".SET") && !Memo(".EQU"); |
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| 71 | case 'M': |
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| 72 | return !Memo("MACRO"); |
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| 73 | case 'F': |
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| 74 | return !Memo("FUNCTION"); |
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| 75 | case 'L': |
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| 76 | return !Memo("LABEL"); |
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| 77 | case 'S': |
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| 78 | return !memo_set_pseudo() && (!(Memo("STRUCT") || Memo("STRUC"))); |
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| 79 | case 'E': |
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| 80 | if (Memo("EQU") || Memo("ENDSTRUCT") || Memo("ENDS") || Memo("ENDSTRUC") || Memo("ENDUNION")) |
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| 81 | return False; |
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| 82 | return !Memo("EVAL"); |
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| 83 | case 'U': |
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| 84 | return !Memo("UNION"); |
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| 85 | default: |
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| 86 | return True; |
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| 87 | } |
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| 88 | } |
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| 89 | |||
| 90 | /*!------------------------------------------------------------------------ |
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| 91 | * \fn LabelHandle(const tStrComp *pName, LargeWord Value, Boolean ForceGlobal) |
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| 92 | * \brief process new label |
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| 93 | * \param pName label's name |
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| 94 | * \param Value label's value |
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| 95 | * \param ForceGlobal force visibility outside macro body |
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| 96 | * ------------------------------------------------------------------------ */ |
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| 97 | |||
| 98 | void LabelHandle(const tStrComp *pName, LargeWord Value, Boolean ForceGlobal) |
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| 99 | { |
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| 100 | pLabelElement = NULL; |
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| 101 | pLabelEntry = NULL; |
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| 102 | |||
| 103 | /* structure element ? */ |
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| 104 | |||
| 105 | if (pInnermostNamedStruct) |
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| 106 | { |
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| 107 | pLabelElement = CreateStructElem(pName); |
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| 108 | if (!pLabelElement) |
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| 109 | return; |
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| 110 | |||
| 111 | pLabelElement->Offset = Value; |
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| 112 | if (AddStructElem(pInnermostNamedStruct->StructRec, pLabelElement)) |
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| 113 | AddStructSymbol(pLabelElement->pElemName, Value); |
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| 114 | } |
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| 115 | |||
| 116 | /* normal label */ |
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| 117 | |||
| 118 | else |
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| 119 | { |
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| 120 | if (ForceGlobal) |
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| 121 | PushLocHandle(-1); |
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| 122 | if (RelSegs) |
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| 123 | pLabelEntry = EnterRelSymbol(pName, Value, (as_addrspace_t)ActPC, False); |
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| 124 | else |
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| 125 | { |
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| 126 | pLabelEntry = EnterIntSymbolWithFlags(pName, Value, (as_addrspace_t)ActPC, False, |
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| 127 | eSymbolFlag_Label | |
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| 128 | (Value == AfterBSRAddr ? eSymbolFlag_NextLabelAfterBSR : eSymbolFlag_None)); |
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| 129 | } |
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| 130 | if (ForceGlobal) |
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| 131 | PopLocHandle(); |
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| 132 | } |
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| 133 | LabelValue = Value; |
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| 134 | } |
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| 135 | |||
| 136 | /*!------------------------------------------------------------------------ |
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| 137 | * \fn LabelModify(LargeWord OldValue, LargeWord NewValue) |
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| 138 | * \brief change value of current label |
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| 139 | * \param OldValue current value to check consistency |
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| 140 | * \param NewValue new value to assign |
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| 141 | * ------------------------------------------------------------------------ */ |
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| 142 | |||
| 143 | void LabelModify(LargeWord OldValue, LargeWord NewValue) |
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| 144 | { |
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| 145 | if (OldValue == LabelValue) |
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| 146 | { |
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| 147 | if (pLabelElement) |
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| 148 | pLabelElement->Offset = NewValue; |
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| 149 | if (pLabelEntry) |
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| 150 | ChangeSymbol(pLabelEntry, NewValue); |
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| 151 | LabelValue = NewValue; |
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| 152 | } |
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| 153 | } |
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| 154 | |||
| 155 | /*!------------------------------------------------------------------------ |
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| 156 | * \fn AsmLabelPassInit(void) |
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| 157 | * \brief Initializations before passing through sources |
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| 158 | * ------------------------------------------------------------------------ */ |
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| 159 | |||
| 160 | void AsmLabelPassInit(void) |
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| 161 | { |
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| 162 | LabelReset(); |
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| 163 | } |
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| 164 | |||
| 165 | /*!------------------------------------------------------------------------ |
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| 166 | * \fn asmlabel_init(void) |
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| 167 | * \brief Initializations once at startup |
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| 168 | * ------------------------------------------------------------------------ */ |
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| 169 | |||
| 170 | void asmlabel_init(void) |
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| 171 | { |
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| 172 | LabelReset(); |
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| 173 | } |