Mu - linux/134emit-hex-array.subx

From 3350c34a74844e21ea69077e01efff3bae64bdcd Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Tue, 23 Mar 2021 17:31:08 -0700 Subject: . --- html/linux/134emit-hex-array.subx.html | 172 +++++++++++++++++++++++++++++++++ 1 file changed, 172 insertions(+) create mode 100644 html/linux/134emit-hex-array.subx.html (limited to 'html/linux/134emit-hex-array.subx.html') diff --git a/html/linux/134emit-hex-array.subx.html b/html/linux/134emit-hex-array.subx.html new file mode 100644 index 00000000..837a6d1a --- /dev/null +++ b/html/linux/134emit-hex-array.subx.html @@ -0,0 +1,172 @@ + + + + +Mu - linux/134emit-hex-array.subx + + + + + + + + + + +https://github.com/akkartik/mu/blob/main/linux/134emit-hex-array.subx +

+  1 == code
+  2 #   instruction                     effective address                                                   register    displacement    immediate
+  3 # . op          subop               mod             rm32          base        index         scale       r32
+  4 # . 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
+  5 
+  6 # print 'arr' in hex with a space after every byte
+  7 emit-hex-array:  # out: (addr buffered-file), arr: (addr array byte)
+  8     # . prologue
+  9     55/push-ebp
+ 10     89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
+ 11     # . save registers
+ 12     50/push-eax
+ 13     51/push-ecx
+ 14     52/push-edx
+ 15     57/push-edi
+ 16     # edi = out
+ 17     8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           7/r32/edi   8/disp8         .                 # copy *(ebp+8) to edi
+ 18     # edx = arr
+ 19     8b/copy                         1/mod/*+disp8   5/rm32/ebp    .           .             .           2/r32/edx   0xc/disp8       .                 # copy *(ebp+12) to edx
+ 20     # var curr/ecx: (addr byte) = arr->data
+ 21     8d/copy-address                 1/mod/*+disp8   2/rm32/edx    .           .             .           1/r32/ecx   4/disp8         .                 # copy edx+4 to ecx
+ 22     # var max/edx: (addr byte) = &arr->data[arr->size]
+ 23     8b/copy                         0/mod/indirect  2/rm32/edx    .           .             .           2/r32/edx   .               .                 # copy *edx to edx
+ 24     01/add                          3/mod/direct    2/rm32/edx    .           .             .           1/r32/ecx   .               .                 # add ecx to edx
+ 25     # var c/eax: byte = 0
+ 26     31/xor                          3/mod/direct    0/rm32/eax    .           .             .           0/r32/eax   .               .                 # clear eax
+ 27 $emit-hex-array:loop:
+ 28     # if (curr >= width) break
+ 29     39/compare                      3/mod/direct    1/rm32/ecx    .           .             .           2/r32/edx   .               .                 # compare ecx with edx
+ 30     73/jump-if-addr>=  $emit-hex-array:end/disp8
+ 31     # emit-hex(out, c = *curr, width=1)
+ 32     # . . push args
+ 33     68/push  1/imm32/width
+ 34     8a/copy-byte                    0/mod/indirect  1/rm32/ecx    .           .             .           0/r32/AL    .               .                 # copy byte at *ecx to AL
+ 35     50/push-eax
+ 36     57/push-edi
+ 37     # . . call
+ 38     e8/call  emit-hex/disp32
+ 39     # . . discard args
+ 40     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
+ 41     # ++curr
+ 42     41/increment-ecx
+ 43     eb/jump  $emit-hex-array:loop/disp8
+ 44 $emit-hex-array:end:
+ 45     # . restore registers
+ 46     5f/pop-to-edi
+ 47     5a/pop-to-edx
+ 48     59/pop-to-ecx
+ 49     58/pop-to-eax
+ 50     # . epilogue
+ 51     89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
+ 52     5d/pop-to-ebp
+ 53     c3/return
+ 54 
+ 55 test-emit-hex-array:
+ 56     # . prologue
+ 57     55/push-ebp
+ 58     89/copy                         3/mod/direct    5/rm32/ebp    .           .             .           4/r32/esp   .               .                 # copy esp to ebp
+ 59     # setup
+ 60     # . clear-stream(_test-output-stream)
+ 61     # . . push args
+ 62     68/push  _test-output-stream/imm32
+ 63     # . . call
+ 64     e8/call  clear-stream/disp32
+ 65     # . . discard args
+ 66     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
+ 67     # . clear-stream($_test-output-buffered-file->buffer)
+ 68     # . . push args
+ 69     68/push  $_test-output-buffered-file->buffer/imm32
+ 70     # . . call
+ 71     e8/call  clear-stream/disp32
+ 72     # . . discard args
+ 73     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
+ 74     # var arr/ecx (array byte) = [01, 02, 03]
+ 75     68/push  0x00030201/imm32  # bytes 01 02 03
+ 76     68/push  3/imm32/size
+ 77     89/copy                         3/mod/direct    1/rm32/ecx    .           .             .           4/r32/esp   .               .                 # copy esp to ecx
+ 78     # emit-hex-array(_test-output-buffered-file, arr)
+ 79     # . . push args
+ 80     51/push-ecx
+ 81     68/push  _test-output-buffered-file/imm32
+ 82     # . . call
+ 83     e8/call  emit-hex-array/disp32
+ 84     # . . discard args
+ 85     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               8/imm32           # add to esp
+ 86     # . flush(_test-output-buffered-file)
+ 87     # . . push args
+ 88     68/push  _test-output-buffered-file/imm32
+ 89     # . . call
+ 90     e8/call  flush/disp32
+ 91     # . . discard args
+ 92     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               4/imm32           # add to esp
+ 93 +-- 33 lines: #?     # dump output ------------------------------------------------------------------------------------------------------------------------------------------------------
+126     # check-next-stream-line-equal(_test-output-stream, "01 02 03 ", msg)
+127     # . . push args
+128     68/push  "F - test-emit-hex-array"/imm32
+129     68/push  "01 02 03 "/imm32
+130     68/push  _test-output-stream/imm32
+131     # . . call
+132     e8/call  check-next-stream-line-equal/disp32
+133     # . . discard args
+134     81          0/subop/add         3/mod/direct    4/rm32/esp    .           .             .           .           .               0xc/imm32         # add to esp
+135     # . epilogue
+136     89/copy                         3/mod/direct    4/rm32/esp    .           .             .           5/r32/ebp   .               .                 # copy ebp to esp
+137     5d/pop-to-ebp
+138     c3/return
+139 
+140 # . . vim:nowrap:textwidth=0
+

+ + + -- cgit 1.4.1-2-gfad0