49e22fe678
This is a small change to make it easier to support architectures that need to restore more than just the sp and pc registers. In particular, it is needed for the AVR architecture that needs to restore the frame pointer (Y register).
50 строки
1,2 КиБ
ArmAsm
50 строки
1,2 КиБ
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 set to a non-zero value if we
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// jump from here, so we use rax as the temporary value for jumpPC.
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movq 0(%rdi), %rsp // jumpSP
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movq 8(%rdi), %rax // jumpPC
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jmpq *%rax
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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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