910 lines
49 KiB
Plaintext
910 lines
49 KiB
Plaintext
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# - managing tables
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# SubX has rudimentary support for tables.
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#
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# Each table is a stream of (key, value) rows.
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#
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# Each row consists of a 4-byte key (address to a string) and a variable-size
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# 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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== 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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get: # table : (address stream {string, _}), key : (address string), row-size : int -> EAX : (address _)
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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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# . prolog
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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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# curr/ECX = 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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# max/EDX = 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 != 0) return EAX = curr+4
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3d/compare-EAX-and 0/imm32
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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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# . epilog
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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, 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 "\n"/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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# . prolog
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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 : (address stream {string, number}) = stream(2 rows * 8 bytes)
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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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# . epilog
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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 : (address stream {string, _}), key : (address slice), row-size : int -> EAX : (address _)
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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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# . prolog
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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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# curr/ECX = 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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# max/EDX = 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 != 0) return EAX = curr+4
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3d/compare-EAX-and 0/imm32
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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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# . epilog
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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, 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 "\n"/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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# . prolog
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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 : (address stream {string, number}) = stream(2 rows * 8 bytes)
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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
|
||
|
|
# 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
|
||
|
|
$test-get-slice:check1:
|
||
|
|
# (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 = {EAX, EDX}
|
||
|
|
52/push-EDX
|
||
|
|
50/push-EAX
|
||
|
|
89/copy 3/mod/direct 2/rm32/EDX . . . 4/r32/ESP . . # copy ESP to EDX
|
||
|
|
# EAX = get-slice(table, "code", 8 bytes per row)
|
||
|
|
# . . push args
|
||
|
|
68/push 8/imm32/row-size
|
||
|
|
52/push-EDX
|
||
|
|
51/push-ECX
|
||
|
|
# . . call
|
||
|
|
e8/call 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) # first row's value slot returned
|
||
|
|
# . check-ints-equal(EAX - table, 16, msg)
|
||
|
|
# . . push args
|
||
|
|
68/push "F - test-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
|
||
|
|
$test-get-slice:check2:
|
||
|
|
# (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 = {EAX, EDX}
|
||
|
|
52/push-EDX
|
||
|
|
50/push-EAX
|
||
|
|
89/copy 3/mod/direct 2/rm32/EDX . . . 4/r32/ESP . . # copy ESP to EDX
|
||
|
|
# EAX = 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 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, 12, msg)
|
||
|
|
# . check-ints-equal(EAX - table, 24, msg)
|
||
|
|
# . . 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:
|
||
|
|
# . epilog
|
||
|
|
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 : (address stream {string, _}), key : (address string), row-size : int -> EAX : (address _)
|
||
|
|
# 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
|
||
|
|
#
|
||
|
|
# . prolog
|
||
|
|
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
|
||
|
|
# curr/ECX = table->data
|
||
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 0xc/disp8 . # copy ESI+12 to ECX
|
||
|
|
# max/EDX = 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 != 0) return EAX = curr+4
|
||
|
|
3d/compare-EAX-and 0/imm32
|
||
|
|
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
|
||
|
|
# . epilog
|
||
|
|
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:
|
||
|
|
# . prolog
|
||
|
|
55/push-EBP
|
||
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
|
# var table/ECX : (address stream {string, number}) = stream(2 rows * 8 bytes)
|
||
|
|
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-string-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-string-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-string-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-string-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-string-equal(*table->data+8, "data", msg)
|
||
|
|
# check-string-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-string-equal/disp32
|
||
|
|
# . . discard args
|
||
|
|
81 0/subop/add 3/mod/direct 4/rm32/ESP . . . . . 0xc/imm32 # add to ESP
|
||
|
|
$test-get-or-insert:end:
|
||
|
|
# . epilog
|
||
|
|
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 : (address stream {string, _}), key : (address slice), row-size : int -> EAX : (address _)
|
||
|
|
# 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
|
||
|
|
#
|
||
|
|
# . prolog
|
||
|
|
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
|
||
|
|
# curr/ECX = table->data
|
||
|
|
8d/copy-address 1/mod/*+disp8 6/rm32/ESI . . . 1/r32/ECX 0xc/disp8 . # copy ESI+12 to ECX
|
||
|
|
# max/EDX = 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 != 0) return EAX = curr+4
|
||
|
|
3d/compare-EAX-and 0/imm32
|
||
|
|
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
|
||
|
|
# . epilog
|
||
|
|
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:
|
||
|
|
# . prolog
|
||
|
|
55/push-EBP
|
||
|
|
89/copy 3/mod/direct 5/rm32/EBP . . . 4/r32/ESP . . # copy ESP to EBP
|
||
|
|
# var table/ECX : (address stream {string, number}) = stream(2 rows * 8 bytes)
|
||
|
|
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 = {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-string-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-string-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-string-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-string-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 = {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
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# table gets a new row
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# check-ints-equal(EAX - table->data, 12, msg) # second row's value slot returned
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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-leaky-get-or-insert-slice/6"/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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||
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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(table->write, 2 rows = 16, msg)
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||
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# . . push args
|
||
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68/push "F - test-leaky-get-or-insert-slice/7"/imm32
|
||
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68/push 0x10/imm32/two-rows
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||
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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-string-equal(*table->data+8, "data", msg)
|
||
|
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# check-string-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-string-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:
|
||
|
|
# . epilog
|
||
|
|
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
|