7a5d4c9537
This patch adds support for generating GOOS=darwin GOARCH=arm64 binaries. This means that it will become possible to run `go test` on recent Macs, for example.
76 строки
2,1 КиБ
ArmAsm
76 строки
2,1 КиБ
ArmAsm
#ifdef __MACH__
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.global _tinygo_startTask
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_tinygo_startTask:
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#else
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.section .text.tinygo_startTask
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.global tinygo_startTask
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.type tinygo_startTask, %function
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tinygo_startTask:
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#endif
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.cfi_startproc
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// Small assembly stub for starting a goroutine. This is already run on the
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// new stack, with the callee-saved registers already loaded.
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// Most importantly, x19 contains the pc of the to-be-started function and
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// x20 contains the only argument it is given. Multiple arguments are packed
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// into one by storing them in a new allocation.
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// Indicate to the unwinder that there is nothing to unwind, this is the
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// root frame. It avoids the following (bogus) error message in GDB:
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// Backtrace stopped: previous frame identical to this frame (corrupt stack?)
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.cfi_undefined lr
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// Set the first argument of the goroutine start wrapper, which contains all
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// the arguments.
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mov x0, x20
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// Branch to the "goroutine start" function. By using blx instead of bx,
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// we'll return here instead of tail calling.
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blr x19
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// After return, exit this goroutine. This is a tail call.
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#ifdef __MACH__
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b _tinygo_pause
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#else
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b tinygo_pause
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#endif
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.cfi_endproc
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#ifndef __MACH__
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.size tinygo_startTask, .-tinygo_startTask
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#endif
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#ifdef __MACH__
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.global _tinygo_swapTask
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_tinygo_swapTask:
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#else
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.global tinygo_swapTask
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.type tinygo_swapTask, %function
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tinygo_swapTask:
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#endif
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// This function gets the following parameters:
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// x0 = newStack uintptr
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// x1 = oldStack *uintptr
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// Save all callee-saved registers:
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stp x19, x20, [sp, #-96]!
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stp x21, x22, [sp, #16]
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stp x23, x24, [sp, #32]
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stp x25, x26, [sp, #48]
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stp x27, x28, [sp, #64]
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stp x29, x30, [sp, #80]
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// Save the current stack pointer in oldStack.
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mov x8, sp
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str x8, [x1]
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// Switch to the new stack pointer.
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mov sp, x0
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// Restore stack state and return.
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ldp x29, x30, [sp, #80]
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ldp x27, x28, [sp, #64]
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ldp x25, x26, [sp, #48]
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ldp x23, x24, [sp, #32]
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ldp x21, x22, [sp, #16]
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ldp x19, x20, [sp], #96
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ret
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