1694 lines
91 KiB
Plaintext
1694 lines
91 KiB
Plaintext
# A table is a stream of (key, value) rows.
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#
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# Each row consists of a 4-byte key -- a 'string_key' which is (addr array
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# byte) -- and a variable-size value.
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#
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# Accessing the table performs a linear scan for a key string, and always
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# requires passing in the row size.
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#
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# Table primitives have the form <variant>(stream, <arg>, row-size, ...) -> address/eax
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#
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# The following table shows available options for <variant>:
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# if not found: | arg=string arg=slice
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# ------------------------+---------------------------------------------------
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# abort | get get-slice
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# insert key | get-or-insert leaky-get-or-insert-slice
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# stop | get-or-stop get-slice-or-stop
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# return null | maybe-get maybe-get-slice
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# Some variants may take extra args.
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== code
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# instruction effective address register displacement immediate
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# . op subop mod rm32 base index scale r32
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# . 1-3 bytes 3 bits 2 bits 3 bits 3 bits 3 bits 2 bits 2 bits 0/1/2/4 bytes 0/1/2/4 bytes
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# if no row is found, abort
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# type string_key = (addr array byte)
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get: # table : (addr stream {string_key, T}), key : string_key, row-size : int, abort-message-prefix : (addr array byte) -> eax : (addr T)
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# pseudocode:
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# curr = table->data
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# max = &table->data[table->write]
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# while curr < max
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# if string-equal?(key, *curr)
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# return curr+4
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# curr += row-size
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# abort
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#
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# . save registers
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51/push-ecx
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52/push-edx
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56/push-esi
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# esi = table
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
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# var curr/ecx : (addr string_key) = table->data
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8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
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# var max/edx : (addr byte) = &table->data[table->write]
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8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
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8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
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$get:search-loop:
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# if (curr >= max) abort
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39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
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73/jump-if-greater-or-equal-unsigned $get:abort/disp8
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# if (string-equal?(key, *curr)) return curr+4
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# . eax = string-equal?(key, *curr)
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# . . push args
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ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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# . . call
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e8/call string-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . if (eax != false) return eax = curr+4
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3d/compare-eax-and 0/imm32/false
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74/jump-if-equal $get:mismatch/disp8
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8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
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eb/jump $get:end/disp8
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$get:mismatch:
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# curr += row-size
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03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
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# loop
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eb/jump $get:search-loop/disp8
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$get:end:
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# . restore registers
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5e/pop-to-esi
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5a/pop-to-edx
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59/pop-to-ecx
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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$get:abort:
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# . _write(2/stderr, abort-message-prefix)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20)
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . _write(2/stderr, error)
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# . . push args
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68/push ": get: key not found: "/imm32
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . _write(2/stderr, key)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . _write(2/stderr, "\n")
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# . . push args
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68/push Newline/imm32
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . syscall(exit, 1)
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bb/copy-to-ebx 1/imm32
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b8/copy-to-eax 1/imm32/exit
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cd/syscall 0x80/imm8
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# never gets here
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test-get:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# - setup: create a table with a couple of keys
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# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
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81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
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68/push 0x10/imm32/length
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68/push 0/imm32/read
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68/push 0/imm32/write
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# insert(table, "code", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "code"/imm32
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51/push-ecx
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# . . call
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e8/call get-or-insert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# insert(table, "data", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "data"/imm32
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51/push-ecx
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# . . call
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e8/call get-or-insert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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$test-get:check1:
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# eax = get(table, "code", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "code"/imm32
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51/push-ecx
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# . . call
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e8/call get/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(eax - table->data, 4, msg)
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# . check-ints-equal(eax - table, 16, msg)
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# . . push args
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68/push "F - test-get/0"/imm32
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68/push 0x10/imm32
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29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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$test-get:check2:
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# eax = get(table, "data", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "data"/imm32
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51/push-ecx
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# . . call
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e8/call get/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(eax - table->data, 12, msg)
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# . check-ints-equal(eax - table, 24, msg)
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# . . push args
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68/push "F - test-get/1"/imm32
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68/push 0x18/imm32
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29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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$test-get:end:
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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# if no row is found, abort
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get-slice: # table : (addr stream {string_key, T}), key : (addr slice), row-size : int, abort-message-prefix : (addr array byte) -> eax : (addr T)
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# pseudocode:
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# curr = table->data
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# max = &table->data[table->write]
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# while curr < max
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# if slice-equal?(key, *curr)
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# return curr+4
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# curr += row-size
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# abort
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#
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# . save registers
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51/push-ecx
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52/push-edx
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56/push-esi
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# esi = table
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8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
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# var curr/ecx : (addr string_key) = table->data
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8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
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# var max/edx : (addr byte) = &table->data[table->write]
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8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
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8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
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$get-slice:search-loop:
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# if (curr >= max) abort
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39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
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73/jump-if-greater-or-equal-unsigned $get-slice:abort/disp8
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# if (slice-equal?(key, *curr)) return curr+4
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# . eax = slice-equal?(key, *curr)
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# . . push args
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ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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# . . call
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e8/call slice-equal?/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . if (eax != false) return eax = curr+4
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3d/compare-eax-and 0/imm32/false
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74/jump-if-equal $get-slice:mismatch/disp8
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8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
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eb/jump $get-slice:end/disp8
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$get-slice:mismatch:
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# curr += row-size
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03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
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# loop
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eb/jump $get-slice:search-loop/disp8
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$get-slice:end:
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# . restore registers
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5e/pop-to-esi
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5a/pop-to-edx
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59/pop-to-ecx
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# . epilogue
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89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
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5d/pop-to-ebp
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c3/return
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$get-slice:abort:
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# . _write(2/stderr, abort-message-prefix)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20)
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . _write(2/stderr, error)
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# . . push args
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68/push ": get-slice: key not found: "/imm32
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . write-slice-buffered(Stderr, key)
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# . . push args
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ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
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68/push Stderr/imm32
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# . . call
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e8/call write-slice-buffered/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . flush(Stderr)
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# . . push args
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68/push Stderr/imm32
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# . . call
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e8/call flush/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
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# . _write(2/stderr, "\n")
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# . . push args
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68/push Newline/imm32
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68/push 2/imm32/stderr
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# . . call
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e8/call _write/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
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# . syscall(exit, 1)
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bb/copy-to-ebx 1/imm32
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b8/copy-to-eax 1/imm32/exit
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cd/syscall 0x80/imm8
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# never gets here
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test-get-slice:
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# . prologue
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55/push-ebp
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89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
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# - setup: create a table with a couple of keys
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# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
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81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
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68/push 0x10/imm32/length
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68/push 0/imm32/read
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68/push 0/imm32/write
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89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
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# insert(table, "code", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "code"/imm32
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51/push-ecx
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# . . call
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e8/call get-or-insert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# insert(table, "data", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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68/push "data"/imm32
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51/push-ecx
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# . . call
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e8/call get-or-insert/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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$test-get-slice:check1:
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# (eax..edx) = "code"
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b8/copy-to-eax "code"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
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05/add-to-eax 4/imm32
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# var slice/edx : (ref slice) = {eax, edx}
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52/push-edx
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50/push-eax
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89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
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# eax = get-slice(table, "code", 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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52/push-edx
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51/push-ecx
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# . . call
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e8/call get-slice/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(eax - table->data, 4, msg) # first row's value slot returned
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# . check-ints-equal(eax - table, 16, msg)
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# . . push args
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68/push "F - test-get-slice/0"/imm32
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68/push 0x10/imm32
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29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
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50/push-eax
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# . . call
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e8/call check-ints-equal/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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$test-get-slice:check2:
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# (eax..edx) = "data"
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b8/copy-to-eax "data"/imm32
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8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
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8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
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05/add-to-eax 4/imm32
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# var slice/edx : (ref slice) = {eax, edx}
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52/push-edx
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50/push-eax
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89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
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# eax = get-slice(table, "data" slice, 8 bytes per row)
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# . . push args
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68/push 8/imm32/row-size
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52/push-edx
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51/push-ecx
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# . . call
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e8/call get-slice/disp32
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# . . discard args
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81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
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# check-ints-equal(eax - table->data, 12, msg)
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# . check-ints-equal(eax - table, 24, msg)
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# . . push args
|
|
68/push "F - test-get-slice/1"/imm32
|
|
68/push 0x18/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-slice:end:
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, save 'key' to the next available row
|
|
# if there are no rows free, abort
|
|
# return the address of the value
|
|
# Beware: assume keys are immutable; they're inserted by reference
|
|
# TODO: pass in an allocation descriptor
|
|
get-or-insert: # table : (addr stream {string_key, T}), key : string_key, row-size : int -> eax : (addr T)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if string-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# if table->write >= table->length
|
|
# abort
|
|
# zero-out(max, row-size)
|
|
# *max = key
|
|
# table->write += row-size
|
|
# return max+4
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr string_key) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$get-or-insert:search-loop:
|
|
# if (curr >= max) break
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $get-or-insert:not-found/disp8
|
|
# if (string-equal?(key, *curr)) return curr+4
|
|
# . eax = string-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call string-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $get-or-insert:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $get-or-insert:end/disp8
|
|
$get-or-insert:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $get-or-insert:search-loop/disp8
|
|
$get-or-insert:not-found:
|
|
# result/eax = 0
|
|
31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
|
|
# if (table->write >= table->length) abort
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx
|
|
3b/compare 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 8/disp8 . # compare ecx with *(esi+8)
|
|
73/jump-if-greater-or-equal-unsigned $get-or-insert:abort/disp8
|
|
# zero-out(max, row-size)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16)
|
|
52/push-edx
|
|
# . . call
|
|
e8/call zero-out/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# *max = key
|
|
# . eax = key
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0xc/disp8 . # copy *(ebp+12) to eax
|
|
# . *max = eax
|
|
89/copy 0/mod/indirect 2/rm32/edx . . . 0/r32/eax . . # copy eax to *edx
|
|
# table->write += row-size
|
|
# . eax = row-size
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
|
|
# . table->write += eax
|
|
01/add 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # add eax to *esi
|
|
# return max+4
|
|
# . eax = max
|
|
89/copy 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # copy edx to eax
|
|
# . eax += 4
|
|
05/add-to-eax 4/imm32
|
|
$get-or-insert:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
$get-or-insert:abort:
|
|
# . _write(2/stderr, error)
|
|
# . . push args
|
|
68/push "get-or-insert: table is full\n"/imm32
|
|
68/push 2/imm32/stderr
|
|
# . . call
|
|
e8/call _write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . syscall(exit, 1)
|
|
bb/copy-to-ebx 1/imm32
|
|
b8/copy-to-eax 1/imm32/exit
|
|
cd/syscall 0x80/imm8
|
|
# never gets here
|
|
|
|
test-get-or-insert:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
$test-get-or-insert:first-call:
|
|
# - start with an empty table, insert one key, verify that it was inserted
|
|
# eax = get-or-insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg) # first row's value slot returned
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-insert:check2:
|
|
# check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/1"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/2"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-insert:second-call:
|
|
# - insert the same key again, verify that it was reused
|
|
# eax = get-or-insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg)
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/3"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# no new row inserted
|
|
# . check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/4"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/5"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-insert:third-call:
|
|
# - insert a new key, verify that it was inserted
|
|
# eax = get-or-insert(table, "data", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "data"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# table gets a new row
|
|
# check-ints-equal(eax - table->data, 12, msg) # second row's value slot returned
|
|
# . check-ints-equal(eax - table, 24, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/6"/imm32
|
|
68/push 0x18/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(table->write, 2 rows = 16, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/7"/imm32
|
|
68/push 0x10/imm32/two-rows
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data+8, "data", msg)
|
|
# check-strings-equal(*(table+20), "data", msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-insert/8"/imm32
|
|
68/push "data"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0x14/disp8 . # push *(ecx+20)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-insert:end:
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, save 'key' in the next available row
|
|
# if there are no rows free, abort
|
|
# WARNING: leaks memory
|
|
# TODO: pass in an allocation descriptor
|
|
leaky-get-or-insert-slice: # table : (addr stream {string_key, T}), key : (addr slice), row-size : int -> eax : (addr T)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if slice-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# if table->write >= table->length
|
|
# abort
|
|
# zero-out(max, row-size)
|
|
# *max = slice-to-string(Heap, key)
|
|
# table->write += row-size
|
|
# return max+4
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr string_key) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$leaky-get-or-insert-slice:search-loop:
|
|
# if (curr >= max) break
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $leaky-get-or-insert-slice:not-found/disp8
|
|
# if (slice-equal?(key, *curr)) return curr+4
|
|
# . eax = slice-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call slice-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $leaky-get-or-insert-slice:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $leaky-get-or-insert-slice:end/disp8
|
|
$leaky-get-or-insert-slice:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $leaky-get-or-insert-slice:search-loop/disp8
|
|
$leaky-get-or-insert-slice:not-found:
|
|
# result/eax = 0
|
|
31/xor 3/mod/direct 0/rm32/eax . . . 0/r32/eax . . # clear eax
|
|
# if (table->write >= table->length) abort
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 1/r32/ecx . . # copy *esi to ecx
|
|
3b/compare 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 8/disp8 . # compare ecx with *(esi+8)
|
|
7d/jump-if-greater-or-equal $leaky-get-or-insert-slice:abort/disp8
|
|
# zero-out(max, row-size)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x10/disp8 . # push *(ebp+16)
|
|
52/push-edx
|
|
# . . call
|
|
e8/call zero-out/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# *max = slice-to-string(Heap, key)
|
|
# . eax = slice-to-string(Heap, key)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
68/push Heap/imm32
|
|
# . . call
|
|
e8/call slice-to-string/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . *max = eax
|
|
89/copy 0/mod/indirect 2/rm32/edx . . . 0/r32/eax . . # copy eax to *edx
|
|
# table->write += row-size
|
|
# . eax = row-size
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 0/r32/eax 0x10/disp8 . # copy *(ebp+16) to eax
|
|
# . table->write += eax
|
|
01/add 0/mod/indirect 6/rm32/esi . . . 0/r32/eax . . # add eax to *esi
|
|
# return max+4
|
|
# . eax = max
|
|
89/copy 3/mod/direct 0/rm32/eax . . . 2/r32/edx . . # copy edx to eax
|
|
# . eax += 4
|
|
05/add-to-eax 4/imm32
|
|
$leaky-get-or-insert-slice:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
$leaky-get-or-insert-slice:abort:
|
|
# . _write(2/stderr, error)
|
|
# . . push args
|
|
68/push "leaky-get-or-insert-slice: table is full\n"/imm32
|
|
68/push 2/imm32/stderr
|
|
# . . call
|
|
e8/call _write/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . syscall(exit, 1)
|
|
bb/copy-to-ebx 1/imm32
|
|
b8/copy-to-eax 1/imm32/exit
|
|
cd/syscall 0x80/imm8
|
|
# never gets here
|
|
|
|
test-leaky-get-or-insert-slice:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# (eax..edx) = "code"
|
|
b8/copy-to-eax "code"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/edx : (ref slice) = {eax, edx}
|
|
52/push-edx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
$test-leaky-get-or-insert-slice:first-call:
|
|
# - start with an empty table, insert one key, verify that it was inserted
|
|
# eax = leaky-get-or-insert-slice(table, "code" slice, 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-edx
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call leaky-get-or-insert-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg) # first row's value slot returned
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-leaky-get-or-insert-slice:check2:
|
|
# check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/1"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/2"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-leaky-get-or-insert-slice:second-call:
|
|
# - insert the same key again, verify that it was reused
|
|
# eax = leaky-get-or-insert-slice(table, "code" slice, 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-edx
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call leaky-get-or-insert-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg)
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/3"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# no new row inserted
|
|
# . check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/4"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/5"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-leaky-get-or-insert-slice:third-call:
|
|
# - insert a new key, verify that it was inserted
|
|
# (eax..edx) = "data"
|
|
b8/copy-to-eax "data"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/edx : (ref slice) = {eax, edx}
|
|
52/push-edx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
# eax = leaky-get-or-insert-slice(table, "data" slice, 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-edx
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call leaky-get-or-insert-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# table gets a new row
|
|
# check-ints-equal(eax - table->data, 12, msg) # second row's value slot returned
|
|
# . check-ints-equal(eax - table, 24, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/6"/imm32
|
|
68/push 0x18/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(table->write, 2 rows = 16, msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/7"/imm32
|
|
68/push 0x10/imm32/two-rows
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data+8, "data", msg)
|
|
# check-strings-equal(*(table+20), "data", msg)
|
|
# . . push args
|
|
68/push "F - test-leaky-get-or-insert-slice/8"/imm32
|
|
68/push "data"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0x14/disp8 . # push *(ecx+20)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-leaky-get-or-insert-slice:end:
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, stop(ed)
|
|
get-or-stop: # table : (addr stream {string_key, T}), key : string_key, row-size : int,
|
|
# abort-message-prefix : (addr array byte), err : (addr buffered-file), ed : (addr exit-descriptor)
|
|
# -> eax : (addr T)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if string-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# write-buffered(err, msg)
|
|
# stop(ed)
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr byte) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$get-or-stop:search-loop:
|
|
# if (curr >= max) stop(ed)
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $get-or-stop:stop/disp8
|
|
# if (string-equal?(key, *curr)) return curr+4
|
|
# . eax = string-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call string-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $get-or-stop:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $get-or-stop:end/disp8
|
|
$get-or-stop:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $get-or-stop:search-loop/disp8
|
|
$get-or-stop:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
$get-or-stop:stop:
|
|
# . write-buffered(err, abort-message-prefix)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20)
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-buffered(err, error)
|
|
# . . push args
|
|
68/push ": get-or-stop: key not found: "/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-buffered(err, key)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-buffered(err, "\n")
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . stop(ed, 1)
|
|
# . . push args
|
|
68/push 1/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x1c/disp8 . # push *(ebp+28)
|
|
# . . call
|
|
e8/call stop/disp32
|
|
# never gets here
|
|
$get-or-stop:terminus:
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# syscall(exit, 1)
|
|
b8/copy-to-eax 1/imm32/exit
|
|
cd/syscall 0x80/imm8
|
|
|
|
test-get-or-stop:
|
|
# This test uses exit-descriptors. Use ebp for setting up local variables.
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# setup
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-stream/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# . clear-stream($_test-error-buffered-file->buffer)
|
|
# . . push args
|
|
68/push $_test-error-buffered-file->buffer/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# var ed/edx : (ref exit-descriptor)
|
|
68/push 0/imm32
|
|
68/push 0/imm32
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
# size 'ed' for the calls to 'get-or-stop'
|
|
# . tailor-exit-descriptor(ed, 24)
|
|
# . . push args
|
|
68/push 0x18/imm32/nbytes-of-args-for-get-or-stop
|
|
52/push-edx
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-stop:success:
|
|
# eax = get-or-stop(table, "code", row-size=8, msg, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
52/push-edx/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push "foo"/imm32/abort-prefix
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-stop/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x18/imm32 # add to esp
|
|
$test-get-or-stop:success-assertion:
|
|
# check-ints-equal(eax - table->data, 4, msg)
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-stop/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-stop:failure:
|
|
# eax = get-or-stop(table, "data", row-size=8, msg, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
52/push-edx/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push "foo"/imm32/abort-prefix
|
|
68/push 8/imm32/row-size
|
|
68/push "data"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-stop/disp32
|
|
# registers except esp may be clobbered at this point
|
|
# restore register args, discard others
|
|
59/pop-to-ecx
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # add to esp
|
|
5a/pop-to-edx
|
|
$test-get-or-stop:failure-assertion:
|
|
# check that get-or-stop tried to call stop(1)
|
|
# . check-ints-equal(ed->value, 2, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-stop/1"/imm32
|
|
68/push 2/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-or-stop:end:
|
|
# . epilogue
|
|
# don't restore esp from ebp; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x24/imm32 # add to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, stop(ed)
|
|
get-slice-or-stop: # table : (addr stream {string_key, _}), key : (addr slice), row-size : int,
|
|
# abort-message-prefix : (addr string), err : (addr buffered-file), ed : (addr exit-descriptor)
|
|
# -> eax : (addr _)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if slice-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# write-buffered(err, msg)
|
|
# stop(ed)
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr byte) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$get-slice-or-stop:search-loop:
|
|
# if (curr >= max) stop(ed)
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $get-slice-or-stop:stop/disp8
|
|
# if (slice-equal?(key, *curr)) return curr+4
|
|
# . eax = slice-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call slice-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $get-slice-or-stop:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $get-slice-or-stop:end/disp8
|
|
$get-slice-or-stop:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $get-slice-or-stop:search-loop/disp8
|
|
$get-slice-or-stop:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
$get-slice-or-stop:stop:
|
|
# . write-buffered(err, abort-message-prefix)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x14/disp8 . # push *(ebp+20)
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-buffered(err, error)
|
|
# . . push args
|
|
68/push ": get-slice-or-stop: key not found: "/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-slice-buffered(err, key)
|
|
# . . push args
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-slice-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . write-buffered(err, "\n")
|
|
# . . push args
|
|
68/push Newline/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x18/disp8 . # push *(ebp+24)
|
|
# . . call
|
|
e8/call write-buffered/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . stop(ed, 1)
|
|
# . . push args
|
|
68/push 1/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0x1c/disp8 . # push *(ebp+28)
|
|
# . . call
|
|
e8/call stop/disp32
|
|
# never gets here
|
|
$get-slice-or-stop:terminus:
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# syscall(exit, 1)
|
|
b8/copy-to-eax 1/imm32/exit
|
|
cd/syscall 0x80/imm8
|
|
|
|
test-get-slice-or-stop:
|
|
# This test uses exit-descriptors. Use ebp for setting up local variables.
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# setup
|
|
# . clear-stream(_test-error-stream)
|
|
# . . push args
|
|
68/push _test-error-stream/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# . clear-stream($_test-error-buffered-file->buffer)
|
|
# . . push args
|
|
68/push $_test-error-buffered-file->buffer/imm32
|
|
# . . call
|
|
e8/call clear-stream/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # add to esp
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# var ed/edx : (ref exit-descriptor)
|
|
68/push 0/imm32
|
|
68/push 0/imm32
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
# var slice/ebx : (ref slice) = "code"
|
|
# . (eax..ebx) = "code"
|
|
b8/copy-to-eax "code"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 3/r32/ebx . . # copy *eax to ebx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 3/index/ebx . 3/r32/ebx 4/disp8 . # copy eax+ebx+4 to ebx
|
|
05/add-to-eax 4/imm32
|
|
# . ebx = {eax, ebx}
|
|
53/push-ebx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 3/rm32/ebx . . . 4/r32/esp . . # copy esp to ebx
|
|
# size 'ed' for the calls to 'get-or-stop' (define no locals past this point)
|
|
# . tailor-exit-descriptor(ed, 24)
|
|
# . . push args
|
|
68/push 0x18/imm32/nbytes-of-args-for-get-or-stop
|
|
52/push-edx
|
|
# . . call
|
|
e8/call tailor-exit-descriptor/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-slice-or-stop:success:
|
|
# eax = get-slice-or-stop(table, slice, row-size=8, msg, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
52/push-edx/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push "foo"/imm32/abort-prefix
|
|
68/push 8/imm32/row-size
|
|
53/push-ebx/slice
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-slice-or-stop/disp32
|
|
# registers except esp may be clobbered at this point
|
|
# restore register args, discard others
|
|
59/pop-to-ecx
|
|
5b/pop-to-ebx
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
5a/pop-to-edx
|
|
$test-get-slice-or-stop:success-assertion:
|
|
# check-ints-equal(eax - table->data, 4, msg) # first row's value slot returned
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-get-slice-or-stop/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-slice-or-stop:failure:
|
|
# slice = "segment2"
|
|
# . *ebx = "segment2"->data
|
|
b8/copy-to-eax "segment2"/imm32
|
|
05/add-to-eax 4/imm32
|
|
89/copy 0/mod/indirect 3/rm32/ebx . . . 0/r32/eax . . # copy eax to *ebx
|
|
# . *(ebx+4) = "segment2"->data + len("segment2")
|
|
05/add-to-eax 8/imm32/strlen
|
|
89/copy 1/mod/*+disp8 3/rm32/ebx . . . 0/r32/eax 4/disp8 . # copy eax to *(ebx+4)
|
|
# eax = get-slice-or-stop(table, slice, row-size=8, msg, _test-error-buffered-file, ed)
|
|
# . . push args
|
|
52/push-edx/ed
|
|
68/push _test-error-buffered-file/imm32
|
|
68/push "foo"/imm32/abort-prefix
|
|
68/push 8/imm32/row-size
|
|
53/push-ebx/slice
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-slice-or-stop/disp32
|
|
# registers except esp may be clobbered at this point
|
|
# restore register args, discard others
|
|
59/pop-to-ecx
|
|
5b/pop-to-ebx
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
5a/pop-to-edx
|
|
$test-get-slice-or-stop:failure-assertion:
|
|
# check that get-or-stop tried to call stop(1)
|
|
# . check-ints-equal(ed->value, 2, msg)
|
|
# . . push args
|
|
68/push "F - test-get-or-stop/1"/imm32
|
|
68/push 2/imm32
|
|
# . . push ed->value
|
|
ff 6/subop/push 1/mod/*+disp8 2/rm32/edx . . . . 4/disp8 . # push *(edx+4)
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-get-slice-or-stop:end:
|
|
# . epilogue
|
|
# don't restore esp from ebp; manually reclaim locals
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0x2c/imm32 # add to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, return null (0)
|
|
maybe-get: # table : (addr stream {string_key, T}), key : string_key, row-size : int -> eax : (addr T)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if string-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# return 0
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr byte) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$maybe-get:search-loop:
|
|
# if (curr >= max) return null
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $maybe-get:null/disp8
|
|
# if (string-equal?(key, *curr)) return curr+4
|
|
# . eax = string-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call string-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $maybe-get:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $maybe-get:end/disp8
|
|
$maybe-get:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $maybe-get:search-loop/disp8
|
|
$maybe-get:null:
|
|
b8/copy-to-eax 0/imm32
|
|
$maybe-get:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
test-maybe-get:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# - setup: create a table with one row
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# eax = get-or-insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get:success:
|
|
# - check for the same key, verify that it was reused
|
|
# eax = maybe-get(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call maybe-get/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg)
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# no new row inserted
|
|
# . check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get/1"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get/2"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get:failure:
|
|
# - search for a new key
|
|
# eax = maybe-get(table, "data", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "data"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call maybe-get/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get/3"/imm32
|
|
68/push 0/imm32
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get:end:
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# if no row is found, return null (0)
|
|
maybe-get-slice: # table : (addr stream {string_key, T}), key : (addr slice), row-size : int -> eax : (addr T)
|
|
# pseudocode:
|
|
# curr = table->data
|
|
# max = &table->data[table->write]
|
|
# while curr < max
|
|
# if slice-equal?(key, *curr)
|
|
# return curr+4
|
|
# curr += row-size
|
|
# return 0
|
|
#
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# . save registers
|
|
51/push-ecx
|
|
52/push-edx
|
|
56/push-esi
|
|
# esi = table
|
|
8b/copy 1/mod/*+disp8 5/rm32/ebp . . . 6/r32/esi 8/disp8 . # copy *(ebp+8) to esi
|
|
# var curr/ecx : (addr string_key) = table->data
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/esi . . . 1/r32/ecx 0xc/disp8 . # copy esi+12 to ecx
|
|
# var max/edx : (addr byte) = &table->data[table->write]
|
|
8b/copy 0/mod/indirect 6/rm32/esi . . . 2/r32/edx . . # copy *esi to edx
|
|
8d/copy-address 0/mod/indirect 4/rm32/sib 1/base/ecx 2/index/edx . 2/r32/edx . . # copy ecx+edx to edx
|
|
$maybe-get-slice:search-loop:
|
|
# if (curr >= max) return null
|
|
39/compare 3/mod/direct 1/rm32/ecx . . . 2/r32/edx . . # compare ecx with edx
|
|
73/jump-if-greater-or-equal-unsigned $maybe-get-slice:null/disp8
|
|
# if (slice-equal?(key, *curr)) return curr+4
|
|
# . eax = slice-equal?(key, *curr)
|
|
# . . push args
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
|
|
# . . call
|
|
e8/call slice-equal?/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
|
|
# . if (eax != false) return eax = curr+4
|
|
3d/compare-eax-and 0/imm32/false
|
|
74/jump-if-equal $maybe-get-slice:mismatch/disp8
|
|
8d/copy-address 1/mod/*+disp8 1/rm32/ecx . . . 0/r32/eax 4/disp8 . # copy ecx+4 to eax
|
|
eb/jump $maybe-get-slice:end/disp8
|
|
$maybe-get-slice:mismatch:
|
|
# curr += row-size
|
|
03/add 1/mod/*+disp8 5/rm32/ebp . . . 1/r32/ecx 0x10/disp8 . # add *(ebp+16) to ecx
|
|
# loop
|
|
eb/jump $maybe-get-slice:search-loop/disp8
|
|
$maybe-get-slice:null:
|
|
b8/copy-to-eax 0/imm32
|
|
$maybe-get-slice:end:
|
|
# . restore registers
|
|
5e/pop-to-esi
|
|
5a/pop-to-edx
|
|
59/pop-to-ecx
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
test-maybe-get-slice:
|
|
# . prologue
|
|
55/push-ebp
|
|
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
|
|
# - setup: create a table with one row
|
|
# var table/ecx : (ref stream {string, number} 16) # 2 rows * 8 bytes/row
|
|
81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 0x10/imm32 # subtract from esp
|
|
68/push 0x10/imm32/length
|
|
68/push 0/imm32/read
|
|
68/push 0/imm32/write
|
|
89/copy 3/mod/direct 1/rm32/ecx . . . 4/r32/esp . . # copy esp to ecx
|
|
# insert(table, "code", 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
68/push "code"/imm32
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call get-or-insert/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get-slice:success:
|
|
# - check for the same key, verify that it was reused
|
|
# (eax..edx) = "code"
|
|
b8/copy-to-eax "code"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/edx : (ref slice) = {eax, edx}
|
|
52/push-edx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
# eax = maybe-get-slice(table, "code" slice, 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-edx
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call maybe-get-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax - table->data, 4, msg)
|
|
# . check-ints-equal(eax - table, 16, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get-slice/0"/imm32
|
|
68/push 0x10/imm32
|
|
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# no new row inserted
|
|
# . check-ints-equal(table->write, row-size = 8, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get-slice/1"/imm32
|
|
68/push 8/imm32/row-size
|
|
ff 6/subop/push 0/mod/indirect 1/rm32/ecx . . . . . . # push *ecx
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-strings-equal(*table->data, "code", msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get-slice/2"/imm32
|
|
68/push "code"/imm32
|
|
ff 6/subop/push 1/mod/*+disp8 1/rm32/ecx . . . . 0xc/disp8 . # push *(ecx+12)
|
|
# . . call
|
|
e8/call check-strings-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get-slice:failure:
|
|
# - search for a new key
|
|
# (eax..edx) = "data"
|
|
b8/copy-to-eax "data"/imm32
|
|
8b/copy 0/mod/indirect 0/rm32/eax . . . 2/r32/edx . . # copy *eax to edx
|
|
8d/copy-address 1/mod/*+disp8 4/rm32/sib 0/base/eax 2/index/edx . 2/r32/edx 4/disp8 . # copy eax+edx+4 to edx
|
|
05/add-to-eax 4/imm32
|
|
# var slice/edx : (ref slice) = {eax, edx}
|
|
52/push-edx
|
|
50/push-eax
|
|
89/copy 3/mod/direct 2/rm32/edx . . . 4/r32/esp . . # copy esp to edx
|
|
# eax = maybe-get-slice(table, "data" slice, 8 bytes per row)
|
|
# . . push args
|
|
68/push 8/imm32/row-size
|
|
52/push-edx
|
|
51/push-ecx
|
|
# . . call
|
|
e8/call maybe-get-slice/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
# check-ints-equal(eax, 0, msg)
|
|
# . . push args
|
|
68/push "F - test-maybe-get-slice/3"/imm32
|
|
68/push 0/imm32
|
|
50/push-eax
|
|
# . . call
|
|
e8/call check-ints-equal/disp32
|
|
# . . discard args
|
|
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 0xc/imm32 # add to esp
|
|
$test-maybe-get-slice:end:
|
|
# . epilogue
|
|
89/copy 3/mod/direct 4/rm32/esp . . . 5/r32/ebp . . # copy ebp to esp
|
|
5d/pop-to-ebp
|
|
c3/return
|
|
|
|
# . . vim:nowrap:textwidth=0
|