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Removed REAL_EXEC(); there is no longer any code using it.
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@ -191,17 +191,6 @@ extern void remove_from_rm_stack ( void *data, size_t size );
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".code32\n\t" \
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".previous\n\t"
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/* REAL_EXEC: execute a fragment of code in real mode */
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#define OUT_CONSTRAINTS(...) __VA_ARGS__
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#define IN_CONSTRAINTS(...) __VA_ARGS__
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#define CLOBBER(...) __VA_ARGS__
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#define REAL_EXEC( name, asm_code_str, num_out_constraints, \
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out_constraints, in_constraints, clobber ) do { \
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__asm__ __volatile__ ( \
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REAL_CODE ( asm_code_str ) \
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: out_constraints : in_constraints : clobber ); \
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} while ( 0 )
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#endif /* ASSEMBLY */
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#endif /* LIBRM_H */
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@ -68,17 +68,16 @@ typedef struct segoff segoff_t;
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*
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* You should place variables in .data16 when they need to be accessed
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* by real-mode code. Real-mode assembly (e.g. as created by
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* REAL_EXEC()) can access these variables via the usual data segment.
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* REAL_CODE()) can access these variables via the usual data segment.
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* You can therefore write something like
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*
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* static uint16_t __data16 ( foo );
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* #define foo __use_data16 ( foo )
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*
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* int bar ( void ) {
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* REAL_EXEC ( baz,
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* "int $0xff\n\t"
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* "movw %ax, foo",
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* ... );
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* __asm__ __volatile__ ( REAL_CODE ( "int $0xff\n\t"
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* "movw %ax, foo" )
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* : : );
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* return foo;
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* }
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*
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@ -113,33 +112,15 @@ typedef struct segoff segoff_t;
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*/
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/*
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* REAL_EXEC ( name, asm_code_str, num_out_constraints, out_constraints,
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* in_constraints, clobber )
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* REAL_CODE ( asm_code_str )
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*
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* out_constraints must be of the form OUT_CONSTRAINTS(constraints),
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* and in_constraints must be of the form IN_CONSTRAINTS(constraints),
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* where "constraints" is a constraints list as would be used in an
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* inline __asm__()
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* This can be used in inline assembly to create a fragment of code
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* that will execute in real mode. For example: to write a character
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* to the BIOS console using INT 10, you would do something like:
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*
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* clobber must be of the form CLOBBER ( clobber_list ), where
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* "clobber_list" is a clobber list as would be used in an inline
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* __asm__().
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* __asm__ __volatile__ ( REAL_CODE ( "int $0x16" )
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* : "=a" ( character ) : "a" ( 0x0000 ) );
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*
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* These are best illustrated by example. To write a character to the
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* console using INT 10, you would do something like:
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*
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* REAL_EXEC ( rm_test_librm,
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* "int $0x10",
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* 1,
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* OUT_CONSTRAINTS ( "=a" ( discard ) ),
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* IN_CONSTRAINTS ( "a" ( 0x0e00 + character ),
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* "b" ( 1 ) ),
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* CLOBBER ( "ebx", "ecx", "edx", "ebp", "esi", "edi" ) );
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*
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* IMPORTANT: gcc does not automatically assume that input operands
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* get clobbered. The only way to specify that an input operand may
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* be modified is to also specify it as an output operand; hence the
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* "(discard)" in the above code.
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*/
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#endif /* ASSEMBLY */
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@ -421,7 +421,7 @@ prot_call:
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* callee to preserve. Gate A20 will be re-enabled in case the
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* real-mode routine disabled it.
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*
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* librm.h defines a convenient macro REAL_EXEC() for using real_call.
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* librm.h defines a convenient macro REAL_CODE() for using real_call.
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* See librm.h and realmode.h for details and examples.
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*
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* Parameters:
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