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tinygo/targets/gameboy-advance.json

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targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
{
targets: match LLVM triple to the one Clang uses The target triples have to match mostly to be able to link LLVM modules. Linking LLVM modules is already possible (the triples already match), but testing becomes much easier when they match exactly. For macOS, I picked "macosx10.12.0". That's an old and unsupported version, but I had to pick _something_. Clang by default uses "macos10.4.0", which is much older.
3 years ago
"llvm-target": "armv4t-unknown-unknown-eabi",
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
"cpu": "arm7tdmi",
all: update to LLVM 14 Switch over to LLVM 14 for static builds. Keep using LLVM 13 for regular builds for now. This uses a branch of the upstream Espressif branch to fix an issue, see: https://github.com/espressif/llvm-project/pull/59
3 years ago
"features": "+armv4t,+strict-align,-aes,-bf16,-cdecp0,-cdecp1,-cdecp2,-cdecp3,-cdecp4,-cdecp5,-cdecp6,-cdecp7,-crc,-crypto,-d32,-dotprod,-dsp,-fp-armv8,-fp-armv8d16,-fp-armv8d16sp,-fp-armv8sp,-fp16,-fp16fml,-fp64,-fpregs,-fullfp16,-hwdiv,-hwdiv-arm,-i8mm,-lob,-mve,-mve.fp,-neon,-pacbti,-ras,-sb,-sha2,-thumb-mode,-vfp2,-vfp2sp,-vfp3,-vfp3d16,-vfp3d16sp,-vfp3sp,-vfp4,-vfp4d16,-vfp4d16sp,-vfp4sp",
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
"build-tags": ["gameboyadvance", "arm7tdmi", "baremetal", "linux", "arm"],
"goos": "linux",
"goarch": "arm",
"linker": "ld.lld",
gameboy-advance: include compiler-rt in build This avoids errors like the following: ld.lld-9: error: undefined symbol: __umodsi3 ld.lld-9: error: undefined symbol: __aeabi_uidivmod
5 years ago
"rtlib": "compiler-rt",
all: include picolibc for bare metal targets This is necessary for better CGo support on bare metal. Existing libraries expect to be able to include parts of libc and expect to be able to link to those symbols. Because with this all targets have a working libc, it is now possible to add tests to check that a libc in fact works basically. Not all parts of picolibc are included, such as the math or stdio parts. These should be added later, when needed. This commit also avoids the need for the custom memcpy/memset/memcmp symbols that are sometimes emitted by LLVM. The C library will take care of that.
5 years ago
"libc": "picolibc",
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
"cflags": [
"-Werror",
"-fshort-enums",
arm: use -fomit-frame-pointer The frame pointer was already omitted in the object files that TinyGo emits, but wasn't yet omitted in the C files it compiles. Omitting the frame pointer is good for code size (and perhaps performance). The frame pointer was originally used for printing stack traces in a debugger. However, advances in DWARF debug info have made it largely unnecessary (debug info contains enough information now to recover the frame pointer even without an explicit frame pointer register). In fact, GDB has been able to produce backtraces in TinyGo compiled code for a while now while it didn't include a frame pointer.
5 years ago
"-fomit-frame-pointer",
Also disable asynchronous unwind tables These seem to be enabled in LLVM 14, and cause undefined symbol errors.
3 years ago
"-fno-exceptions", "-fno-unwind-tables", "-fno-asynchronous-unwind-tables",
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
"-ffunction-sections", "-fdata-sections"
],
"ldflags": [
compileopts: add linkerscript key Setting the linker script as one property (instead of as part of the generic ldflags property) allows it to be overriden. This is important for the SoftDevice on Nordic chips, because the SoftDevice takes up a fixed part of the flash/RAM and the application must be flashed at a different position. With this linkerscript option, it is possible to create (for example) a pca10040-s132v6 that overrides the default linker script.
5 years ago
"--gc-sections"
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
],
compileopts: add linkerscript key Setting the linker script as one property (instead of as part of the generic ldflags property) allows it to be overriden. This is important for the SoftDevice on Nordic chips, because the SoftDevice takes up a fixed part of the flash/RAM and the application must be flashed at a different position. With this linkerscript option, it is possible to create (for example) a pca10040-s132v6 that overrides the default linker script.
5 years ago
"linkerscript": "targets/gameboy-advance.ld",
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
"extra-files": [
runtime: copy stack scan assembly for GBA The GC stack scanning code was implemented in the Cortex-M assembly, which meant that it was not available on the GBA which is pre-cortex. This change adds a copy of the relevant code into a new asembly file which is used on the GBA.
5 years ago
"targets/gameboy-advance.s",
compiler: implement recover() built-in function
3 years ago
"src/runtime/asm_arm.S"
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
],
gdb: enable to specify multiple candidates for gdb
4 years ago
"gdb": ["gdb-multiarch"],
all: make emulator command a string instead of a []string This matches the flash-command and is generally a bit easier to work with. This commit also prepares for allowing multiple formats to be used in the emulator command, which is necessary for the esp32.
3 years ago
"emulator": "mgba -3 {}"
targets: add support for GameBoy Advance Only tested in an emulator (mGBA). Almost nothing is supported, but drawing to the screen works.
5 years ago
}