From 695f9bf8d0a7d0a871b8ab75270ceb29715d9be3 Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Thu, 25 Jul 2019 00:08:23 -0700 Subject: 5468 --- html/subx/068error-byte.subx.html | 200 +++++++++++++++++--------------------- 1 file changed, 91 insertions(+), 109 deletions(-) (limited to 'html/subx/068error-byte.subx.html') diff --git a/html/subx/068error-byte.subx.html b/html/subx/068error-byte.subx.html index 2fdb0eb5..a8d70d8c 100644 --- a/html/subx/068error-byte.subx.html +++ b/html/subx/068error-byte.subx.html @@ -58,115 +58,97 @@ if ('onhashchange' in window) { https://github.com/akkartik/mu/blob/master/subx/068error-byte.subx
-  1 # Print an error message followed by the text representation of a byte. Then exit.
-  2 
-  3 == code
-  4 #   instruction                     effective address                                                   register    displacement    immediate
-  5 # . op          subop               mod             rm32          base        index         scale       r32
-  6 # . 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
-  7 
-  8 #? Entry:  # manual test
-  9 #?     # . var ed/EAX : exit-descriptor
- 10 #?     81          5/subop/subtract    3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # subtract from ESP
- 11 #?     89/copy                         3/mod/direct    0/rm32/EAX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EAX
- 12 #?     # . configure ed to really exit()
- 13 #?     # . . ed->target = 0
- 14 #?     c7          0/subop/copy        0/mod/direct    0/rm32/EAX    .           .             .           .           .               0/imm32           # copy to *EAX
- 15 #?     # . error-byte(ed, Stdout, msg, 34)
- 16 #?     68/push  0x34/imm32
- 17 #?     68/push  "abc"/imm32
- 18 #?     68/push  Stderr/imm32
- 19 #?     50/push-EAX
- 20 #?     e8/call  error-byte/disp32
- 21 #?     # . syscall(exit, Num-test-failures)
- 22 #?     8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/EBX   Num-test-failures/disp32          # copy *Num-test-failures to EBX
- 23 #?     b8/copy-to-EAX  1/imm32/exit
- 24 #?     cd/syscall  0x80/imm8
- 25 
- 26 # write(out, "Error: "+msg+": "+byte) then stop(ed, 1)
- 27 error-byte:  # ed : (address exit-descriptor), out : (address buffered-file), msg : (address array byte), n : byte -> <void>
- 28     # . prolog
- 29     55/push-EBP
- 30     89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
- 31     # write-buffered(out, "Error: ")
- 32     # . . push args
- 33     68/push  "Error: "/imm32
- 34     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 35     # . . call
- 36     e8/call  write-buffered/disp32
- 37     # . . discard args
- 38     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
- 39     # write-buffered(out, msg)
- 40     # . . push args
- 41     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
- 42     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 43     # . . call
- 44     e8/call  write-buffered/disp32
- 45     # . . discard args
- 46     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
- 47     # write-buffered(out, ": ")
- 48     # . . push args
- 49     68/push  ": "/imm32
- 50     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 51     # . . call
- 52     e8/call  write-buffered/disp32
- 53     # . . discard args
- 54     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
- 55     # print-byte-buffered(out, byte)
- 56     # . . push args
- 57     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x14/disp8      .                 # push *(EBP+20)
- 58     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 59     # . . call
- 60     e8/call  print-byte-buffered/disp32
- 61     # . . discard args
- 62     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
- 63     # write-buffered(out, Newline)
- 64     # . . push args
- 65     68/push  Newline/imm32
- 66     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 67     # . . call
- 68     e8/call  write-buffered/disp32
- 69     # . . discard args
- 70     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
- 71     # . flush(out)
- 72     # . . push args
- 73     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
- 74     # . . call
- 75     e8/call  flush/disp32
- 76     # . . discard args
- 77     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
- 78     # stop(ed, 1)
- 79     # . . push args
- 80     68/push  1/imm32
- 81     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
- 82     # . . call
- 83     e8/call  stop/disp32
- 84     # should never get past this point
- 85 $error-byte:dead-end:
- 86     # . epilog
- 87     89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
- 88     5d/pop-to-EBP
- 89     c3/return
- 90 
- 91 == data
- 92 
- 93 # The buffered file for standard error.
- 94 Stderr:
- 95     # file descriptor or (address stream)
- 96     2/imm32  # standard error
- 97     # current write index
- 98     0/imm32
- 99     # current read index
-100     0/imm32
-101     # length
-102     8/imm32
-103     # data
-104     00 00 00 00 00 00 00 00  # 8 bytes
-105 
-106 # TODO: 8 bytes is too small. We'll need to grow the buffer for efficiency. But
-107 # I don't want to type in 1024 bytes here.
-108 
-109 # . . vim:nowrap:textwidth=0
+ 1 # Print an error message followed by the text representation of a byte. Then exit.
+ 2 
+ 3 == code
+ 4 #   instruction                     effective address                                                   register    displacement    immediate
+ 5 # . op          subop               mod             rm32          base        index         scale       r32
+ 6 # . 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
+ 7 
+ 8 #? Entry:  # manual test
+ 9 #?     # . var ed/EAX : exit-descriptor
+10 #?     81          5/subop/subtract    3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # subtract from ESP
+11 #?     89/copy                         3/mod/direct    0/rm32/EAX    .           .             .           4/r32/ESP   .               .                 # copy ESP to EAX
+12 #?     # . configure ed to really exit()
+13 #?     # . . ed->target = 0
+14 #?     c7          0/subop/copy        0/mod/direct    0/rm32/EAX    .           .             .           .           .               0/imm32           # copy to *EAX
+15 #?     # . error-byte(ed, Stdout, msg, 34)
+16 #?     68/push  0x34/imm32
+17 #?     68/push  "abc"/imm32
+18 #?     68/push  Stderr/imm32
+19 #?     50/push-EAX
+20 #?     e8/call  error-byte/disp32
+21 #?     # . syscall(exit, Num-test-failures)
+22 #?     8b/copy                         0/mod/indirect  5/rm32/.disp32            .             .           3/r32/EBX   Num-test-failures/disp32          # copy *Num-test-failures to EBX
+23 #?     b8/copy-to-EAX  1/imm32/exit
+24 #?     cd/syscall  0x80/imm8
+25 
+26 # write(out, "Error: "+msg+": "+byte) then stop(ed, 1)
+27 error-byte:  # ed : (address exit-descriptor), out : (address buffered-file), msg : (address array byte), n : byte -> <void>
+28     # . prolog
+29     55/push-EBP
+30     89/copy                         3/mod/direct    5/rm32/EBP    .           .             .           4/r32/ESP   .               .                 # copy ESP to EBP
+31     # write-buffered(out, "Error: ")
+32     # . . push args
+33     68/push  "Error: "/imm32
+34     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+35     # . . call
+36     e8/call  write-buffered/disp32
+37     # . . discard args
+38     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+39     # write-buffered(out, msg)
+40     # . . push args
+41     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x10/disp8      .                 # push *(EBP+16)
+42     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+43     # . . call
+44     e8/call  write-buffered/disp32
+45     # . . discard args
+46     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+47     # write-buffered(out, ": ")
+48     # . . push args
+49     68/push  ": "/imm32
+50     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+51     # . . call
+52     e8/call  write-buffered/disp32
+53     # . . discard args
+54     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+55     # print-byte-buffered(out, byte)
+56     # . . push args
+57     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0x14/disp8      .                 # push *(EBP+20)
+58     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+59     # . . call
+60     e8/call  print-byte-buffered/disp32
+61     # . . discard args
+62     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+63     # write-buffered(out, Newline)
+64     # . . push args
+65     68/push  Newline/imm32
+66     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+67     # . . call
+68     e8/call  write-buffered/disp32
+69     # . . discard args
+70     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               8/imm32           # add to ESP
+71     # . flush(out)
+72     # . . push args
+73     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           0xc/disp8       .                 # push *(EBP+12)
+74     # . . call
+75     e8/call  flush/disp32
+76     # . . discard args
+77     81          0/subop/add         3/mod/direct    4/rm32/ESP    .           .             .           .           .               4/imm32           # add to ESP
+78     # stop(ed, 1)
+79     # . . push args
+80     68/push  1/imm32
+81     ff          6/subop/push        1/mod/*+disp8   5/rm32/EBP    .           .             .           .           8/disp8         .                 # push *(EBP+8)
+82     # . . call
+83     e8/call  stop/disp32
+84     # should never get past this point
+85 $error-byte:dead-end:
+86     # . epilog
+87     89/copy                         3/mod/direct    4/rm32/ESP    .           .             .           5/r32/EBP   .               .                 # copy EBP to ESP
+88     5d/pop-to-EBP
+89     c3/return
+90 
+91 # . . vim:nowrap:textwidth=0
-- cgit 1.4.1-2-gfad0