#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBKIR
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBKIR
+/* REAL_CODE: declare a fragment of code that executes in real mode */
+#define REAL_CODE( asm_code_str ) \
+ ".code16\n\t" \
+ "pushw %%gs\n\t" \
+ "pushw %%fs\n\t" \
+ "pushw %%es\n\t" \
+ "pushw %%ds\n\t" \
+ asm_code_str \
+ "popw %%ds\n\t" \
+ "popw %%es\n\t" \
+ "popw %%fs\n\t" \
+ "popw %%gs\n\t" \
+ ".code16gcc\n\t"
+
/* REAL_EXEC: execute some inline assembly code in a way that matches
* the interface of librm
*/
#define OUT_CONSTRAINTS(...) __VA_ARGS__
#define IN_CONSTRAINTS(...) __VA_ARGS__
#define CLOBBER(...) __VA_ARGS__
-#define REAL_EXEC( name, asm_code_str, num_out_constraints, out_constraints, \
- in_constraints, clobber ) \
- __asm__ __volatile__ ( \
- ".code16\n\t" \
- "pushw %%gs\n\t" \
- "pushw %%fs\n\t" \
- "pushw %%es\n\t" \
- "pushw %%ds\n\t" \
- "\n" #name ":\n\t" \
- asm_code_str \
- "popw %%ds\n\t" \
- "popw %%es\n\t" \
- "popw %%fs\n\t" \
- "popw %%gs\n\t" \
- ".code16gcc\n\t" \
- : out_constraints \
- : in_constraints \
- : clobber \
- );
+#define REAL_EXEC( name, asm_code_str, num_out_constraints, \
+ out_constraints, in_constraints, clobber ) do { \
+ __asm__ __volatile__ ( \
+ REAL_CODE ( asm_code_str ) \
+ : out_constraints : in_constraints : clobber ); \
+ } while ( 0 )
#endif /* ASSEMBLY */
#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBRM
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBRM
+/* REAL_CODE: declare a fragment of code that executes in real mode */
+#define REAL_CODE( asm_code_str ) \
+ "pushl $1f\n\t" \
+ "call real_call\n\t" \
+ "addl $4, %%esp\n\t" \
+ ".section \".text16\", \"ax\", @progbits\n\t" \
+ ".code16\n\t" \
+ ".arch i386\n\t" \
+ "\n1:\n\t" \
+ asm_code_str "\n\t" \
+ "ret\n\t" \
+ ".code32\n\t" \
+ ".previous\n\t"
+
/* REAL_EXEC: execute a fragment of code in real mode */
#define OUT_CONSTRAINTS(...) __VA_ARGS__
#define IN_CONSTRAINTS(...) __VA_ARGS__
#define REAL_EXEC( name, asm_code_str, num_out_constraints, \
out_constraints, in_constraints, clobber ) do { \
__asm__ __volatile__ ( \
- ".section \".text16\", \"ax\", @progbits\n\t" \
- ".code16\n\t" \
- ".arch i386\n\t" \
- #name ":\n\t" \
- asm_code_str "\n\t" \
- "ret\n\t" \
- ".size " #name ", . - " #name "\n\t" \
- ".code32\n\t" \
- ".previous\n\t" \
- "pushl $" #name "\n\t" \
- "call real_call\n\t" \
- "addl $4, %%esp\n\t" \
+ REAL_CODE ( asm_code_str ) \
: out_constraints : in_constraints : clobber ); \
} while ( 0 )