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[release-branch.go1.24] cmd/internal/obj/wasm: use i64 for large return addr

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Use i64 to avoid overflow when getting PC_F from the return addr.

For #73246.
Fixes #73281.

Change-Id: I5683dccf7eada4b8536edf53e2e83116a2f6d943
GitHub-Last-Rev: 267d9a1a031868430d0af530de14229ee1ae8609
GitHub-Pull-Request: golang/go#73277
Reviewed-on: https://go-review.googlesource.com/c/go/+/663995
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
(cherry picked from commit d60a684c87104ed7836403eab74eb2be1e4a97cb)
Reviewed-on: https://go-review.googlesource.com/c/go/+/668615
Reviewed-by: Carlos Amedee <carlos@golang.org>
This commit is contained in:
Zxilly 2025-04-09 12:17:21 +00:00 committed by Carlos Amedee
parent c1f9c2c7b0
commit f66ab6521c
1 changed files with 4 additions and 3 deletions
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7
src/cmd/internal/obj/wasm/wasmobj.go
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@ -1006,9 +1006,10 @@ func genWasmExportWrapper(s *obj.LSym, appendp func(p *obj.Prog, as obj.As, args
// In the unwinding case, we call wasm_pc_f_loop_export to handle stack switch and rewinding,
// until a normal return (non-unwinding) back to this function.
p = appendp(p, AIf)
p = appendp(p, AI32Const, retAddr)
p = appendp(p, AI32Const, constAddr(16))
p = appendp(p, AI32ShrU)
p = appendp(p, AI64Const, retAddr)
p = appendp(p, AI64Const, constAddr(16))
p = appendp(p, AI64ShrU)
p = appendp(p, AI32WrapI64)
p = appendp(p, ACall, obj.Addr{Type: obj.TYPE_MEM, Name: obj.NAME_EXTERN, Sym: wasm_pc_f_loop_export})
p = appendp(p, AEnd)