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Allow access to variables in .text16 as well as .data16. Chained
interrupt vectors, for example, will be easiest to handle if placed in .text16.
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@ -10,9 +10,11 @@
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*
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*/
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/* Access to variables in .data16, in a way compatible with librm */
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/* Access to variables in .data16 and .text16 in a way compatible with librm */
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#define __data16( variable ) variable
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#define __text16( variable ) variable
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#define __use_data16( variable ) variable
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#define __use_text16( variable ) variable
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/* Copy to/from base memory */
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@ -15,17 +15,26 @@
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*
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*/
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/* Access to variables in .data16 */
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/* Access to variables in .data16 and .text16 */
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extern char *data16;
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extern char *text16;
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#define __data16( variable ) \
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_data16_ ## variable __asm__ ( #variable ) \
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__attribute__ (( section ( ".data16" ) ))
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#define __text16( variable ) \
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_text16_ ## variable __asm__ ( #variable ) \
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__attribute__ (( section ( ".text16" ) ))
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#define __use_data16( variable ) \
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( * ( ( typeof ( _data16_ ## variable ) * ) \
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& ( data16 [ ( size_t ) & ( _data16_ ## variable ) ] ) ) )
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#define __use_text16( variable ) \
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( * ( ( typeof ( _text16_ ## variable ) * ) \
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& ( text16 [ ( size_t ) & ( _text16_ ## variable ) ] ) ) )
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/* Variables in librm.S, present in the normal data segment */
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extern uint16_t rm_sp;
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extern uint16_t rm_ss;
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@ -80,6 +80,9 @@ typedef struct {
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* return foo;
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* }
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*
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* Variables may also be placed in .text16 using __text16 and
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* __use_text16. Some variables (e.g. chained interrupt vectors) fit
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* most naturally in .text16; most should be in .data16.
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*/
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/*
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