Alek Ratzloff
cf9ba376aa
.string, .zstring, .u64, .u32, .u16, .u8 are used before an ImmValue to determine how the memory should be laid out for that value. Signed-off-by: Alek Ratzloff <alekratz@gmail.com>
46 lines
727 B
NASM
46 lines
727 B
NASM
data $0x1000 .. $0x1100 {
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zstr: .zstring "This is a zero-terminated string"
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.export zstr
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}
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code $0x0 {
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zstr_len:
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storeimm32 %r15, $0xFF
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storeimm32 %r16, $1
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storeimm64 %r20, zstr_next
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storeimm64 %r21, exit_zstr
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regcopy %r10, %r00
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zstr_next:
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load %r11, %r10
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and %r11, %r15
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cmpeq %r11, %null
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jnz %r21
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add %r10, %r16
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jmp %r20
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main:
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storeimm64 %r05, zstr_len
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storeimm64 %r00, zstr
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jmp %r05
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exit_zstr:
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regcopy %status, %r10
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halt
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ineg %r00
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add %r10, %r00
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regcopy %status, %r10
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end:
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halt
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.export main
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}
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meta {
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entry: main
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}
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