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ia16-elf-gcc: remove some DOSDATA(.) & DOSTEXT(.) uses; replace

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with actual __far declarations which ia16-elf-gcc now supports
This commit is contained in:
Tee-Kiah Chia 2018-04-21 10:36:42 +08:00 committed by Kenneth J Davis
parent 41cb3a9dc1
commit a4e7d1bf08
4 changed files with 10 additions and 46 deletions
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2
docs/build.txt
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@ -41,7 +41,7 @@ Linux 16.04 LTS (Xenial Xerus) or Ubuntu Linux 14.04 LTS (Trusty
Tahr), there are precompiled ia16-elf-gcc packages at
https://launchpad.net/~tkchia/+archive/ubuntu/build-ia16/.
Otherwise, for now ia16-elf-gcc needs to be compiled from source.
Only releases 20171210 and later are supported.
Only releases 20180419 and later are supported.
Notes:
======

5
kernel/init-dat.h
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@ -28,9 +28,8 @@ extern __segment DosTextSeg;
#elif defined(__GNUC__)
#define DosTextSeg 0x70
/* XXX not supported yet */
#define DOSFAR
#define DOSTEXTFAR
#define DOSFAR FAR
#define DOSTEXTFAR FAR
#undef DOSDATA
#undef DOSTEXT
#define DOSDATA(x) (*(typeof(x) FAR *)MK_FP(DosDataSeg, (size_t)&(x)))

39
kernel/init-mod.h
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@ -265,38 +265,21 @@ extern char master_env[128];
extern struct lol FAR *LoL;
extern struct dhdr DOSTEXTFAR ASM blk_dev; /* Block device (Disk) driver */
#define blk_dev DOSTEXT(blk_dev)
extern struct buffer FAR *DOSFAR firstAvailableBuf; /* first 'available' buffer */
#define firstAvailableBuf DOSDATA(firstAvailableBuf)
#ifdef __GNUC__
extern struct lol ASM DATASTART;
#else
extern struct lol ASM FAR DATASTART;
#endif
#define DATASTART DOSDATA(DATASTART)
extern BYTE DOSFAR ASM _HMATextAvailable; /* first byte of available CODE area */
#ifdef __GNUC__
extern BYTE ASM _HMATextStart[]; /* first byte of HMAable CODE area */
extern BYTE ASM _HMATextEnd[];
#else
extern BYTE FAR ASM _HMATextStart[]; /* first byte of HMAable CODE area */
extern BYTE FAR ASM _HMATextEnd[];
#endif
extern BYTE DOSFAR ASM break_ena; /* break enabled flag */
#define break_ena DOSDATA(break_ena)
extern BYTE DOSFAR ASM _InitTextStart[], /* first available byte of ram */
DOSFAR ASM _InitTextEnd[],
DOSFAR ASM ReturnAnyDosVersionExpected,
DOSFAR ASM HaltCpuWhileIdle;
#define ReturnAnyDosVersionExpected DOSDATA(ReturnAnyDosVersionExpected)
#define HaltCpuWhileIdle DOSDATA(HaltCpuWhileIdle)
extern BYTE DOSFAR ASM _InitTextStart[]; /* first available byte of ram */
extern BYTE DOSFAR ASM _InitTextEnd[];
extern BYTE DOSFAR ASM ReturnAnyDosVersionExpected;
extern BYTE DOSFAR ASM HaltCpuWhileIdle;
extern BYTE DOSFAR ASM internal_data[];
#define internal_data DOSDATA(internal_data)
extern unsigned char DOSTEXTFAR ASM kbdType;
#define kbdType DOSTEXT(kbdType)
extern struct {
char ThisIsAConstantOne;
@ -305,29 +288,23 @@ extern struct {
struct CountrySpecificInfo C;
} DOSFAR ASM nlsCountryInfoHardcoded;
#define nlsCountryInfoHardcoded DOSDATA(nlsCountryInfoHardcoded)
#define nlsPackageHardcoded DOSDATA(nlsPackageHardcoded)
/*
data shared between DSK.C and INITDISK.C
*/
extern UWORD DOSFAR LBA_WRITE_VERIFY;
#define LBA_WRITE_VERIFY DOSDATA(LBA_WRITE_VERIFY)
/* original interrupt vectors, at 70:xxxx */
extern struct lowvec {
unsigned char intno;
intvec isv;
} DOSTEXTFAR ASM intvec_table[5];
#define intvec_table DOSTEXT(intvec_table)
/* floppy parameter table, at 70:xxxx */
extern unsigned char DOSTEXTFAR ASM int1e_table[0xe];
#define int1e_table DOSTEXT(int1e_table)
extern char DOSFAR DiskTransferBuffer[/*MAX_SEC_SIZE*/]; /* in dsk.c */
#define DiskTransferBuffer DOSDATA(DiskTransferBuffer)
struct RelocationTable {
UBYTE jmpFar;
@ -345,14 +322,10 @@ struct RelocatedEntry {
UWORD jmpSegment;
};
extern struct RelocationTable
DOSFAR ASM _HMARelocationTableStart[],
DOSFAR ASM _HMARelocationTableEnd[];
#define _HMARelocationTableStart DOSDATA(_HMARelocationTableStart)
#define _HMARelocationTableEnd DOSDATA(_HMARelocationTableEnd)
extern struct RelocationTable DOSFAR ASM _HMARelocationTableStart[];
extern struct RelocationTable DOSFAR ASM _HMARelocationTableEnd[];
extern void FAR *DOSFAR ASM XMSDriverAddress;
#define XMSDriverAddress DOSDATA(XMSDriverAddress)
#ifdef __GNUC__
extern VOID _EnableA20(VOID);
extern VOID _DisableA20(VOID);

10
kernel/main.c
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@ -68,12 +68,7 @@ __segment DosTextSeg = 0;
#endif
struct lol FAR *LoL
#ifndef __GNUC__
/* cannot initialize from far data with GCC */
= &DATASTART;
#endif
;
struct lol FAR *LoL = &DATASTART;
VOID ASMCFUNC FreeDOSmain(void)
{
@ -95,9 +90,6 @@ VOID ASMCFUNC FreeDOSmain(void)
at 50:e0
*/
#ifdef __GNUC__
LoL = &DATASTART;
#endif
drv = LoL->BootDrive + 1;
p = MK_FP(0, 0x5e0);
if (fmemcmp(p+2,"CONFIG",6) == 0) /* UPX */