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Add documentation about the object file format

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Copied from the HTML documentation and updated.

Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
This commit is contained in:
Antonio Niño Díaz
2017-04-16 19:54:55 +01:00
parent 26af7fcffe
commit d92c284b85
3 changed files with 202 additions and 7 deletions
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4
Makefile
View File

@@ -63,7 +63,7 @@ rgbgfx_obj = \
all: rgbasm rgblink rgbfix rgbgfx
clean:
$Q${RM} rgbds.html gbz80.html
$Q${RM} rgbds.html gbz80.html rgbds.rgbformat.html
$Q${RM} rgbasm rgbasm.exe ${rgbasm_obj} rgbasm.html rgbasm-lang.html
$Q${RM} rgblink rgblink.exe ${rgblink_obj} rgblink.html rgblink-script.html
$Q${RM} rgbfix rgbfix.exe ${rgbfix_obj} rgbfix.html
@@ -80,6 +80,7 @@ install: all
$Qmkdir -p ${DESTDIR}${mandir}/man1 ${DESTDIR}${mandir}/man5 ${DESTDIR}${mandir}/man7
$Qinstall -m ${MANMODE} src/rgbds.7 ${DESTDIR}${mandir}/man7/rgbds.7
$Qinstall -m ${MANMODE} src/gbz80.7 ${DESTDIR}${mandir}/man7/gbz80.7
$Qinstall -m ${MANMODE} src/rgbds.rgbformat.5 ${DESTDIR}${mandir}/man7/rgbds.rgbformat.5
$Qinstall -m ${MANMODE} src/asm/rgbasm.1 ${DESTDIR}${mandir}/man1/rgbasm.1
$Qinstall -m ${MANMODE} src/asm/rgbasm.5 ${DESTDIR}${mandir}/man1/rgbasm.5
$Qinstall -m ${MANMODE} src/fix/rgbfix.1 ${DESTDIR}${mandir}/man1/rgbfix.1
@@ -138,6 +139,7 @@ MANDOC = -Thtml -Ios=General -Oman=/rgbds/manual/%N/ \
wwwman:
$Qmandoc ${MANDOC} src/rgbds.7 | sed s/OpenBSD/General/ > rgbds.html
$Qmandoc ${MANDOC} src/gbz80.7 | sed s/OpenBSD/General/ > gbz80.html
$Qmandoc ${MANDOC} src/rgbds.rgbformat.5 | sed s/OpenBSD/General/ > rgbds.rgbformat.html
$Qmandoc ${MANDOC} src/asm/rgbasm.1 | sed s/OpenBSD/General/ > \
rgbasm.html
$Qmandoc ${MANDOC} src/asm/rgbasm.5 | sed s/OpenBSD/General/ > \

11
src/asm/output.c
View File

@@ -201,16 +201,15 @@ writepatch(struct Patch * pPatch, FILE * f)
void
writesection(struct Section * pSect, FILE * f)
{
fputstring(pSect->pzName, f); // RGB3 addition
fputstring(pSect->pzName, f);
fputlong(pSect->nPC, f);
fputc(pSect->nType, f);
fputlong(pSect->nOrg, f);
//RGB1 addition
fputlong(pSect->nBank, f);
//RGB1 addition
fputlong(pSect->nAlign, f); // RGB3 addition
fputlong(pSect->nAlign, f);
if ((pSect->nType == SECT_ROM0)
|| (pSect->nType == SECT_ROMX)) {

194
src/rgbds.rgbformat.5 Normal file
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@@ -0,0 +1,194 @@
.\" Copyright (c) 2017 Antonio Nino Diaz <antonio_nd@outlook.com>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd April 13, 2017
.Dt RGBDS.RGBFORMAT 5
.Os RGBDS Manual
.Sh NAME
.Nm rgbds.rgbformat
.Nd file format documentation
.Sh DESCRIPTION
This is the description of the object files used by
.Xr rgbasm 1
and
.Xr rgblink 1 .
Please, note that the specifications may change.
This toolchain is in development and new features may require adding more
information to the current format, or modifying some fields, which would break
compatibility with older versions.
.Pp
.Sh FILE STRUCTURE
The following types are used:
.Pp
.Ar LONG
is a 32‐bit integer stored in little‐endian format (Intel).
.Ar BYTE
is an 8‐bit integer.
.Ar STRING
is a 0‐terminated string of
.Ar BYTE .
.Pp
.Bd -literal
; Header
BYTE ID[4] ; "RGB4"
LONG NumberOfSymbols ; The number of symbols used in this file
LONG NumberOfSections ; The number of sections used in this file
; Symbols
REPT NumberOfSymbols ; Number of symbols defined in this object file.
STRING Name ; The name of this symbol. Local symbols are stored
; as "Scope.Symbol".
BYTE Type ; 0 = LOCAL symbol only used in this file.
; 1 = IMPORT this symbol from elsewhere (unused).
; 2 = EXPORT this symbol to other objects.
IF Type != 1 ; If symbol is defined in this object file.
LONG SectionID ; The section number (of this object file) in which
; this symbol is defined.
LONG Value ; The symbols value. It's the offset into that
; symbol's section.
ENDC
ENDR
; Sections
REPT NumberOfSections
STRING Name ; Name of the section
LONG Size ; Size in bytes of this section
BYTE Type ; 0 = WRAM0
; 1 = VRAM
; 2 = ROMX
; 3 = ROM0
; 4 = HRAM
; 5 = WRAMX
; 6 = SRAM
; 7 = OAM
LONG Org ; Address to fix this section at. -1 if the linker should
; decide (floating address).
LONG Bank ; Bank to load this section into. -1 if the linker should
; decide (floating bank). This field is only valid for ROMX,
; VRAM, WRAMX and SRAM sections.
LONG Align ; Alignment of this section (expressed as number of low bits
; to leave as 0). -1 if not defined.
IF (Type == ROMX) || (Type == ROM0) ; Sections that can contain data.
BYTE Data[Size] ; Raw data of the section.
LONG NumberOfPatches ; Number of patches to apply.
; These types of sections may have patches
REPT NumberOfPatches
STRING SourceFile ; Name of the source file (for printing error
; messages).
LONG Line ; The line of the source file.
LONG Offset ; Offset into the section where patch should
; be applied (in bytes).
BYTE Type ; 0 = BYTE patch.
; 1 = little endian WORD patch.
; 2 = little endianLONG patch.
; 3 = big endian WORD patch (unused)
; 4 = big endian LONG patch (unused)
LONG RPNSize ; Size of the buffer with the RPN.
; expression.
BYTE RPN[RPNSize] ; RPN expression. Definition below.
ENDR
ENDC
ENDR
.Ed
.Ss RPN DATA
Expressions in the object file are stored as RPN.
This is an expression of the form
.Do 2 5 + Dc .
This will first push the value
.Do 2 Dc to the stack.
Then
.Do 5 Dc .
The
.Do + Dc operator pops two arguments from the stack, adds them, and then pushes
the result on the stack, effectively replacing the two top arguments with their
sum.
In the RGB format, RPN expressions are stored as BYTEs with some bytes being
special prefixes for integers and symbols.
.Pp
.Bl -column -offset indent ".Sy String" ".Sy String"
.It Sy Value Ta Sy Meaning
.It Li $00 Ta Li + operator
.It Li $01 Ta Li - operator
.It Li $02 Ta Li * operator
.It Li $03 Ta Li / operator
.It Li $04 Ta Li % operator
.It Li $05 Ta Li unary -
.It Li $06 Ta Li | operator
.It Li $07 Ta Li & operator
.It Li $08 Ta Li ^ operator
.It Li $09 Ta Li unary ~
.It Li $0A Ta Li && comparison
.It Li $0B Ta Li || comparison
.It Li $0C Ta Li unary !
.It Li $0D Ta Li == comparison
.It Li $0E Ta Li != comparison
.It Li $0F Ta Li > comparison
.It Li $10 Ta Li < comparison
.It Li $11 Ta Li >= comparison
.It Li $12 Ta Li <= comparison
.It Li $13 Ta Li << comparison
.It Li $14 Ta Li >> comparison
.It Li $15 Ta Li BANK()
function.
A symbol ID follows.
.It Li $16 Ta Li HRAMCheck.
Check if the value is in HRAM, AND it with 0xFF.
.It Li $17 No Ta RangeCheck, LOW and HIGH signed LONGs follow.
Check a value to see if it's within the range [LOW;HIGH].
.It Li $80 Ta Ar LONG
integer follows.
.It Li $81 Ta Ar LONG
Symbol ID follows.
.El
.Pp
.Sh SEE ALSO
.Xr rgbasm 1 ,
.Xr rgblink 1 ,
.Xr rgbds 7 ,
.Xr gbz80 7
.Sh HISTORY
.Nm rgbds
was originally written by Carsten S\(/orensen as part of the ASMotor package,
and was later packaged in RGBDS by Justin Lloyd.
It is now maintained by a number of contributors at
https://github.com/rednex/rgbds.