mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-07-26 06:38:42 +00:00
Ayke van Laethem
51 lines
1.1 KiB
ArmAsm
51 lines
1.1 KiB
ArmAsm
#ifdef __ELF__
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.section .text.tinygo_scanCurrentStack
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.global tinygo_scanCurrentStack
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tinygo_scanCurrentStack:
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#else // Darwin
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.global _tinygo_scanCurrentStack
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_tinygo_scanCurrentStack:
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#endif
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// Save callee-saved registers.
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pushq %rbx
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pushq %rbp
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pushq %r12
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pushq %r13
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pushq %r14
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pushq %r15
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// Scan the stack.
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subq $8, %rsp // adjust the stack before the call to maintain 16-byte alignment
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movq %rsp, %rdi
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#ifdef __ELF__
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callq tinygo_scanstack
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#else
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callq _tinygo_scanstack // Darwin
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#endif
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// Restore the stack pointer. Registers do not need to be restored as they
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// were only pushed to be discoverable by the GC.
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addq $56, %rsp
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retq
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#ifdef __ELF__
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.section .text.tinygo_longjmp
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.global tinygo_longjmp
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tinygo_longjmp:
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#else // Darwin
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.global _tinygo_longjmp
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_tinygo_longjmp:
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#endif
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// Note: the code we jump to assumes rax is non-zero so we have to load it
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// with some value here.
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movq $1, %rax
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movq %rdi, %rsp // jumpSP
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jmpq *%rsi // jumpPC
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#ifdef __MACH__ // Darwin
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// allow these symbols to stripped as dead code
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.subsections_via_symbols
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#endif
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