mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-04 19:17:47 +00:00
Ayke van Laethem
ebd4969cde
This adds support for building with `-tags=llvm13` and switches to LLVM
13 for tinygo binaries that are statically linked against LLVM.
Some notes on this commit:
* Added `-mfloat-abi=soft` to all Cortex-M targets because otherwise
nrfx would complain that floating point was enabled on Cortex-M0.
That's not the case, but with `-mfloat-abi=soft` the `__SOFTFP__`
macro is defined which silences this warning.
See: https://reviews.llvm.org/D100372
* Changed from `--sysroot=<root>` to `-nostdlib -isystem <root>` for
musl because with Clang 13, even with `--sysroot` some system
libraries are used which we don't want.
* Changed all `-Xclang -internal-isystem -Xclang` to simply
`-isystem`, for consistency with the above change. It appears to
have the same effect.
* Moved WebAssembly function declarations to the top of the file in
task_asyncify_wasm.S because (apparently) the assembler has become
more strict.
103 lines
3.2 KiB
ArmAsm
103 lines
3.2 KiB
ArmAsm
.globaltype __stack_pointer, i32
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.functype start_unwind (i32) -> ()
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.import_module start_unwind, asyncify
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.functype stop_unwind () -> ()
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.import_module stop_unwind, asyncify
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.functype start_rewind (i32) -> ()
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.import_module start_rewind, asyncify
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.functype stop_rewind () -> ()
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.import_module stop_rewind, asyncify
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.global tinygo_unwind
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.hidden tinygo_unwind
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.type tinygo_unwind,@function
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tinygo_unwind: // func (state *stackState) unwind()
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.functype tinygo_unwind (i32) -> ()
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// Check if we are rewinding.
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i32.const 0
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i32.load8_u tinygo_rewinding
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if // if tinygo_rewinding {
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// Stop rewinding.
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call stop_rewind
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i32.const 0
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i32.const 0
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i32.store8 tinygo_rewinding // tinygo_rewinding = false;
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else
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// Save the C stack pointer (destination structure pointer is in local 0).
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local.get 0
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global.get __stack_pointer
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i32.store 4 // state.csp = getCurrentStackPointer()
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// Ask asyncify to unwind.
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// When resuming, asyncify will return this function with tinygo_rewinding set to true.
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local.get 0
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call start_unwind // asyncify.start_unwind(state)
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end_if
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return
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end_function
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.global tinygo_launch
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.hidden tinygo_launch
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.type tinygo_launch,@function
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tinygo_launch: // func (state *state) launch()
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.functype tinygo_launch (i32) -> ()
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// Switch to the goroutine's C stack.
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global.get __stack_pointer // prev := getCurrentStackPointer()
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local.get 0
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i32.load 12
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global.set __stack_pointer // setStackPointer(state.csp)
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// Get the argument pack and entry pointer.
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local.get 0
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i32.load 4 // args := state.args
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local.get 0
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i32.load 0 // fn := state.entry
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// Launch the entry function.
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call_indirect (i32) -> () // fn(args)
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// Stop unwinding.
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call stop_unwind
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// Restore the C stack.
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global.set __stack_pointer // setStackPointer(prev)
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return
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end_function
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.global tinygo_rewind
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.hidden tinygo_rewind
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.type tinygo_rewind,@function
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tinygo_rewind: // func (state *state) rewind()
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.functype tinygo_rewind (i32) -> ()
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// Switch to the goroutine's C stack.
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global.get __stack_pointer // prev := getCurrentStackPointer()
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local.get 0
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i32.load 12
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global.set __stack_pointer // setStackPointer(state.csp)
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// Get the argument pack and entry pointer.
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local.get 0
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i32.load 4 // args := state.args
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local.get 0
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i32.load 0 // fn := state.entry
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// Prepare to rewind.
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i32.const 0
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i32.const 1
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i32.store8 tinygo_rewinding // tinygo_rewinding = true;
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local.get 0
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i32.const 8
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i32.add
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call start_rewind // asyncify.start_rewind(&state.stackState)
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// Launch the entry function.
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// This will actually rewind the call stack.
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call_indirect (i32) -> () // fn(args)
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// Stop unwinding.
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call stop_unwind
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// Restore the C stack.
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global.set __stack_pointer // setStackPointer(prev)
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return
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end_function
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.hidden tinygo_rewinding # @tinygo_rewinding
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.type tinygo_rewinding,@object
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.section .bss.tinygo_rewinding,"",@
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.globl tinygo_rewinding
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tinygo_rewinding:
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.int8 0 # 0x0
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.size tinygo_rewinding, 1
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