The bank of a section can be requested with `BANK("Section Name")`, and
the bank of the current section with `BANK(@)`. In both cases, the bank
number is resolved by the linker.
New commands have been added to the list of RPN commands of object
files, and the rest has been moved so that new additions don't force a
new change in the number of the enumerations.
Increase object file version, as it is now incompatible with the old
format.
Update manpages to reflect the new ways of using `BANK()` and the new
format of the object files.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
Not all occurrences have been replaced, in some cases they have been
left as they were before (like in rgbgfx and when they are in the
interface of a C standard library function).
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
This warning was added in 781c90b940 as a
way of catching the following cases, which are most likely programmer
mistakes:
DB 1,, 2
DB 1, 2,
However, the warning was also triggered in the following case:
DB
It can be used as a replacement of:
DS 1
In this case, it shouldn't output a warning.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
Even though this behaviour is documented (empty elements are treated as
0), it can be misleading. By having a warning, compatibility is
maintained and potential problems in the code can be detected.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
Unions allow multiple memory allocations (using ds, etc.) to share the
same space in memory.
This allows games to use the same memory for different purposes,
depending on their state.
This also adds documentation on how to use the new UNION, NEXTU, and
ENDU keywords.
In addition, make some formatting changes, and add some extra error handling (for when ELIF, ELSE, or ENDC are encountered without a corresponding IF).
Some commands, such as `DS`, `BANK[n]`, etc, don't allow the use of
negative constants, but there wasn't any check to prohibit the code from
trying to do so.
This patch adds the `uconst` type to the parser to use when a constant
is expected, but it mustn't be negative.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
Local symbols can now be referenced outside the scope of their parent, by using the syntax “Parent.Chlid”.
- Local symbol names are now stored internally as “Parent.Child”.
- The symbol’s scope field no longer forms a linked list of the prior local symbols; it will now always contain the parent.
- Add the ability use EXPORT and GLOBAL with local symbols.
- Reduce duplication between findsymbol() and findpsymbol(), as well as between sym_AddLocalReloc() and sym_AddReloc().
`LD HL,n16` and `LD SP,n16` are handled in a different rule as
`LD r16,n16`, but they are also part of that rule.
This patch converts the `LD r16,n16` rule into two rules, one for doing
`LD BC,n16` and other one for `LD DE,n16`.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
IMPORT is simply useless, any symbol that isn't found in the current
file is automatically flagged as imported symbol.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
They work with the 16-bit registers BC, DE and HL, returning the
corresponding 8-bit register. HIGH() works with AF as well, returning A.
They also work with any kind of constant or symbol, generating a RPN
patch in the object file if the value is not defined at assembly time.
They work with macro arguments as well.
Signed-off-by: Antonio Niño Díaz <antonio_nd@outlook.com>
Replace spaces by tabs for consistency. The rest of the codebase uses
tabs, so the linkerscript parser has to change.
Removed trailing tabs in all codebase.
Signed-off-by: AntonioND <antonio_nd@outlook.com>
When calculating the difference of addresses between two labels, for it
to be defined, either:
- Both of them must have their absolute address defined.
- They belong to the same section, so their relative addresses are
compatible.
This patch adds a check to make sure that any other case is detected so
that the programmer can correct the code.
This applies to rgbasm. The difference of labels can be used, for
example, as argument of DS. The linker can't resize sections, which
means that the final value must be defined when creating the object
file.
Signed-off-by: AntonioND <antonio_nd@outlook.com>
This function produces a similar output to the other error handlers, including printing to stderr, and including a stack trace. However, ‘warning’ is displayed instead of ‘ERROR’, and the compilation does not fail.
This function is now used for the deprecation warnings, ensuring that these errors can be found.
They are still working, they just output a warning.
`jp [hl]` is confusing as it may be thought that the CPU reads the value
pointed by hl and jumps to it.
`ldi a,hl` and `ldd a,hl` are also confusing as they load from the
address pointed by `hl`, the correct mnemonic should say `[hl]`.
Signed-off-by: AntonioND <antonio_nd@outlook.com>
Ensure that IF constructs, REPT blocks, and MACRO defintions are terminated with ENDC, ENDR, or ENDM respectively. If they are not, print an error and stop assembly.
As well as aiding a forgetful programmer, this reduces the risk of memory problems if the file ends less than four bytes after the block starts.
Previously, the copyrept() and copymacro() functions would halt their
first loop (in which they determine the length of the block)
prematurely, causing an underflow when setting len, eventually causing
memory issues.
Whilst this doesn’t solve the len underflow entirely (e.g. if the file
ends immediately without an ENDR/ENDM), it should help with this exact
scenario of null bytes (as #50).
Previously, if BANK is used when defining a section that’s not ROMX,
WRMAX, SRAM or VRAM, a second error message would appear, e.g. “(null)
bank value $1 out of range $5d to $0”.
This would appear due to the usage of uninitialised variables. This
change ensures that the uninitialised variables are not accessed when
using an invalid section.
This also silences compiler warnings about usage of uninitialised
variables.
