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54 lines
1.2 KiB
Plaintext
54 lines
1.2 KiB
Plaintext
;; Copyright (C) 2024 YAMAMOTO Takashi
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;; SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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(module
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(func $fd_read (import "wasi_snapshot_preview1" "fd_read") (param i32 i32 i32 i32) (result i32))
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(func $block_forever (export "block_forever")
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;; read from FD 0
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i32.const 100 ;; iov_base
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i32.const 200 ;; buffer
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i32.store
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i32.const 104 ;; iov_len
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i32.const 1
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i32.store
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i32.const 0 ;; fd 0
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i32.const 100 ;; iov_base
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i32.const 1 ;; iov count
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i32.const 300 ;; retp (out)
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call $fd_read
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unreachable
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)
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(func (export "_start")
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call $block_forever
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)
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;; a dumb malloc/free implementation
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(func (export "malloc") (param i32) (result i32)
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local.get 0
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i32.const 65535
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i32.add
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i32.const 65536
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i32.div_u
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memory.grow
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local.set 0
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local.get 0
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i32.const -1
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i32.eq
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if
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i32.const 0
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return
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end
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local.get 0
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i32.const 65536
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i32.mul
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)
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(func (export "free") (param i32))
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(memory (export "memory") 1)
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;; fake globals to make wasm_set_aux_stack happy
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(global (export "__heap_base") i32 (i32.const 0x10000))
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(global (export "__data_end") i32 (i32.const 0x10000))
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(global (mut i32) (i32.const 0x10000))
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)
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