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cmd/internal/obj/arm64: "AND C_MOVCON, Reg, RSP" instruction causes the assembler crash #25584

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benshi001 opened this issue May 26, 2018 · 2 comments
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cmd/internal/obj/arm64: "AND C_MOVCON, Reg, RSP" instruction causes the assembler crash #25584

benshi001 opened this issue May 26, 2018 · 2 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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Go1.11

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@benshi001
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"AND $0x22220000, R2, RSP"

"--- FAIL: TestARM64EndToEnd (0.02s)
        endtoend_test.go:186: bad opxrrr AND
                02228 (testdata/arm64.s:702)    AND     $572653568, R2, RSP
        endtoend_test.go:186: overflow in spadj: 0 + -572653568 = -572653568
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
        panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x501c37]
@benshi001 benshi001 added the NeedsFix The path to resolution is known, but the work has not been done. label May 26, 2018
@benshi001 benshi001 added this to the Go1.11 milestone May 26, 2018
@benshi001 benshi001 self-assigned this May 26, 2018
@benshi001 benshi001 changed the title cmd/internal/obj/arm64: "AND C_MOVCON, Reg, RSP" instruction causes segment fault cmd/internal/obj/arm64: "AND C_MOVCON, Reg, RSP" instruction causes the assembler crash May 26, 2018
@benshi001
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use RSP as destination in AND is only legal in "AND C_BITCON, Reg, RSP".

The attempt to emulate "AND C_MOVCON, Reg, RSP" by combination of
"MOV C_MOVCON, Rtmp"
"AND Rtmp, RSP, RSP" is illegal,

according to arm64's architecture reference manual,
"AND Reg, Reg, Reg" does not accept RSP as source or destination.

@benshi001
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Sorry, I made a mistake. close it.

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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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