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Towards making KEEP_IT_REAL work again.

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Fix bug that caused over-allocation of .text16 and .data16 memory areas
by a factor of 16.
This commit is contained in:
Michael Brown
2006-08-24 13:18:05 +00:00
parent cddf8df8d4
commit 6abfaa153b
7 changed files with 262 additions and 34 deletions
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9
src/arch/i386/include/libkir.h
View File

@@ -213,6 +213,15 @@ virt_to_user ( void * virtual ) {
#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBKIR
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBKIR
/* TEXT16_CODE: declare a fragment of code that resides in .text16 */
#define TEXT16_CODE( asm_code_str ) \
".section \".text16\", \"ax\", @progbits\n\t" \
".code16\n\t" \
".arch i386\n\t" \
asm_code_str "\n\t" \
".code16gcc\n\t" \
".previous\n\t"
/* REAL_CODE: declare a fragment of code that executes in real mode */
#define REAL_CODE( asm_code_str ) \
".code16\n\t" \

21
src/arch/i386/include/librm.h
View File

@@ -177,19 +177,24 @@ extern void remove_from_rm_stack ( void *data, size_t size );
#define BASEMEM_PARAMETER_INIT BASEMEM_PARAMETER_INIT_LIBRM
#define BASEMEM_PARAMETER_DONE BASEMEM_PARAMETER_DONE_LIBRM
/* TEXT16_CODE: declare a fragment of code that resides in .text16 */
#define TEXT16_CODE( asm_code_str ) \
".section \".text16\", \"ax\", @progbits\n\t" \
".code16\n\t" \
".arch i386\n\t" \
asm_code_str "\n\t" \
".code32\n\t" \
".previous\n\t"
/* 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"
TEXT16_CODE ( "\n1:\n\t" \
asm_code_str \
"\n\t" \
"ret\n\t" )
#endif /* ASSEMBLY */