Browse Source

Enhancement in README

Yann Weber 1 year ago
parent
commit
576bb67fda
12 changed files with 844 additions and 2391 deletions
  1. 6
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      .gitignore
  2. 1
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      AUTHORS
  3. 674
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      COPYING
  4. BIN
      COPYING.gz
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      README
  6. 1
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      README
  7. 159
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      README.md
  8. 1
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      configure.ac
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      docs/Doxyfile.in
  10. 1
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      regen.sh
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      src/asmsh.s

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.gitignore View File

@@ -2,6 +2,8 @@
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 *.gcno
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 *.trs
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 *.log
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+*.o
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+*.a
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 Makefile
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 Makefile.in
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 tests/Makefile.am
@@ -9,7 +11,6 @@ ar-lib
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 aclocal.m4
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 config.h.in~
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 compile
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-COPYING
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 depcomp
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 INSTALL
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 install-sh
@@ -24,3 +25,7 @@ lcov.info
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 stamp-h1
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 autom4te.cache/
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 config.status
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+docs/Doxyfile
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+docs/doxyfile.stamp
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+docs/html
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+docs/man

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AUTHORS View File

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1 1
 Yann Weber <asmsh@yannweb.net>
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+

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COPYING View File

@@ -0,0 +1,674 @@
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+                    GNU GENERAL PUBLIC LICENSE
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+                       Version 3, 29 June 2007
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+not impose a license fee, royalty, or other charge for exercise of
466
+rights granted under this License, and you may not initiate litigation
467
+(including a cross-claim or counterclaim in a lawsuit) alleging that
468
+any patent claim is infringed by making, using, selling, offering for
469
+sale, or importing the Program or any portion of it.
470
+
471
+  11. Patents.
472
+
473
+  A "contributor" is a copyright holder who authorizes use under this
474
+License of the Program or a work on which the Program is based.  The
475
+work thus licensed is called the contributor's "contributor version".
476
+
477
+  A contributor's "essential patent claims" are all patent claims
478
+owned or controlled by the contributor, whether already acquired or
479
+hereafter acquired, that would be infringed by some manner, permitted
480
+by this License, of making, using, or selling its contributor version,
481
+but do not include claims that would be infringed only as a
482
+consequence of further modification of the contributor version.  For
483
+purposes of this definition, "control" includes the right to grant
484
+patent sublicenses in a manner consistent with the requirements of
485
+this License.
486
+
487
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
488
+patent license under the contributor's essential patent claims, to
489
+make, use, sell, offer for sale, import and otherwise run, modify and
490
+propagate the contents of its contributor version.
491
+
492
+  In the following three paragraphs, a "patent license" is any express
493
+agreement or commitment, however denominated, not to enforce a patent
494
+(such as an express permission to practice a patent or covenant not to
495
+sue for patent infringement).  To "grant" such a patent license to a
496
+party means to make such an agreement or commitment not to enforce a
497
+patent against the party.
498
+
499
+  If you convey a covered work, knowingly relying on a patent license,
500
+and the Corresponding Source of the work is not available for anyone
501
+to copy, free of charge and under the terms of this License, through a
502
+publicly available network server or other readily accessible means,
503
+then you must either (1) cause the Corresponding Source to be so
504
+available, or (2) arrange to deprive yourself of the benefit of the
505
+patent license for this particular work, or (3) arrange, in a manner
506
+consistent with the requirements of this License, to extend the patent
507
+license to downstream recipients.  "Knowingly relying" means you have
508
+actual knowledge that, but for the patent license, your conveying the
509
+covered work in a country, or your recipient's use of the covered work
510
+in a country, would infringe one or more identifiable patents in that
511
+country that you have reason to believe are valid.
512
+
513
+  If, pursuant to or in connection with a single transaction or
514
+arrangement, you convey, or propagate by procuring conveyance of, a
515
+covered work, and grant a patent license to some of the parties
516
+receiving the covered work authorizing them to use, propagate, modify
517
+or convey a specific copy of the covered work, then the patent license
518
+you grant is automatically extended to all recipients of the covered
519
+work and works based on it.
520
+
521
+  A patent license is "discriminatory" if it does not include within
522
+the scope of its coverage, prohibits the exercise of, or is
523
+conditioned on the non-exercise of one or more of the rights that are
524
+specifically granted under this License.  You may not convey a covered
525
+work if you are a party to an arrangement with a third party that is
526
+in the business of distributing software, under which you make payment
527
+to the third party based on the extent of your activity of conveying
528
+the work, and under which the third party grants, to any of the
529
+parties who would receive the covered work from you, a discriminatory
530
+patent license (a) in connection with copies of the covered work
531
+conveyed by you (or copies made from those copies), or (b) primarily
532
+for and in connection with specific products or compilations that
533
+contain the covered work, unless you entered into that arrangement,
534
+or that patent license was granted, prior to 28 March 2007.
535
+
536
+  Nothing in this License shall be construed as excluding or limiting
537
+any implied license or other defenses to infringement that may
538
+otherwise be available to you under applicable patent law.
539
+
540
+  12. No Surrender of Others' Freedom.
541
+
542
+  If conditions are imposed on you (whether by court order, agreement or
543
+otherwise) that contradict the conditions of this License, they do not
544
+excuse you from the conditions of this License.  If you cannot convey a
545
+covered work so as to satisfy simultaneously your obligations under this
546
+License and any other pertinent obligations, then as a consequence you may
547
+not convey it at all.  For example, if you agree to terms that obligate you
548
+to collect a royalty for further conveying from those to whom you convey
549
+the Program, the only way you could satisfy both those terms and this
550
+License would be to refrain entirely from conveying the Program.
551
+
552
+  13. Use with the GNU Affero General Public License.
553
+
554
+  Notwithstanding any other provision of this License, you have
555
+permission to link or combine any covered work with a work licensed
556
+under version 3 of the GNU Affero General Public License into a single
557
+combined work, and to convey the resulting work.  The terms of this
558
+License will continue to apply to the part which is the covered work,
559
+but the special requirements of the GNU Affero General Public License,
560
+section 13, concerning interaction through a network will apply to the
561
+combination as such.
562
+
563
+  14. Revised Versions of this License.
564
+
565
+  The Free Software Foundation may publish revised and/or new versions of
566
+the GNU General Public License from time to time.  Such new versions will
567
+be similar in spirit to the present version, but may differ in detail to
568
+address new problems or concerns.
569
+
570
+  Each version is given a distinguishing version number.  If the
571
+Program specifies that a certain numbered version of the GNU General
572
+Public License "or any later version" applies to it, you have the
573
+option of following the terms and conditions either of that numbered
574
+version or of any later version published by the Free Software
575
+Foundation.  If the Program does not specify a version number of the
576
+GNU General Public License, you may choose any version ever published
577
+by the Free Software Foundation.
578
+
579
+  If the Program specifies that a proxy can decide which future
580
+versions of the GNU General Public License can be used, that proxy's
581
+public statement of acceptance of a version permanently authorizes you
582
+to choose that version for the Program.
583
+
584
+  Later license versions may give you additional or different
585
+permissions.  However, no additional obligations are imposed on any
586
+author or copyright holder as a result of your choosing to follow a
587
+later version.
588
+
589
+  15. Disclaimer of Warranty.
590
+
591
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
592
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
593
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
594
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
595
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
596
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
597
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
598
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
599
+
600
+  16. Limitation of Liability.
601
+
602
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
603
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
604
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
605
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
606
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
607
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
608
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
609
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
610
+SUCH DAMAGES.
611
+
612
+  17. Interpretation of Sections 15 and 16.
613
+
614
+  If the disclaimer of warranty and limitation of liability provided
615
+above cannot be given local legal effect according to their terms,
616
+reviewing courts shall apply local law that most closely approximates
617
+an absolute waiver of all civil liability in connection with the
618
+Program, unless a warranty or assumption of liability accompanies a
619
+copy of the Program in return for a fee.
620
+
621
+                     END OF TERMS AND CONDITIONS
622
+
623
+            How to Apply These Terms to Your New Programs
624
+
625
+  If you develop a new program, and you want it to be of the greatest
626
+possible use to the public, the best way to achieve this is to make it
627
+free software which everyone can redistribute and change under these terms.
628
+
629
+  To do so, attach the following notices to the program.  It is safest
630
+to attach them to the start of each source file to most effectively
631
+state the exclusion of warranty; and each file should have at least
632
+the "copyright" line and a pointer to where the full notice is found.
633
+
634
+    <one line to give the program's name and a brief idea of what it does.>
635
+    Copyright (C) <year>  <name of author>
636
+
637
+    This program is free software: you can redistribute it and/or modify
638
+    it under the terms of the GNU General Public License as published by
639
+    the Free Software Foundation, either version 3 of the License, or
640
+    (at your option) any later version.
641
+
642
+    This program is distributed in the hope that it will be useful,
643
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
644
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
645
+    GNU General Public License for more details.
646
+
647
+    You should have received a copy of the GNU General Public License
648
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
649
+
650
+Also add information on how to contact you by electronic and paper mail.
651
+
652
+  If the program does terminal interaction, make it output a short
653
+notice like this when it starts in an interactive mode:
654
+
655
+    <program>  Copyright (C) <year>  <name of author>
656
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
657
+    This is free software, and you are welcome to redistribute it
658
+    under certain conditions; type `show c' for details.
659
+
660
+The hypothetical commands `show w' and `show c' should show the appropriate
661
+parts of the General Public License.  Of course, your program's commands
662
+might be different; for a GUI interface, you would use an "about box".
663
+
664
+  You should also get your employer (if you work as a programmer) or school,
665
+if any, to sign a "copyright disclaimer" for the program, if necessary.
666
+For more information on this, and how to apply and follow the GNU GPL, see
667
+<https://www.gnu.org/licenses/>.
668
+
669
+  The GNU General Public License does not permit incorporating your program
670
+into proprietary programs.  If your program is a subroutine library, you
671
+may consider it more useful to permit linking proprietary applications with
672
+the library.  If this is what you want to do, use the GNU Lesser General
673
+Public License instead of this License.  But first, please read
674
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

BIN
COPYING.gz View File


+ 0
- 7
README View File

@@ -1,7 +0,0 @@
1
-asmsh
2
-
3
-An assembly shell.
4
-
5
-Interactively run assembly into a terminal emulator.
6
-
7
-Uses ptrace syscall to achieve this.

+ 1
- 0
README View File

@@ -0,0 +1 @@
1
+README.md

+ 159
- 0
README.md View File

@@ -0,0 +1,159 @@
1
+# amsh  : a shell that runs assembly
2
+
3
+## Description
4
+
5
+A shell designed to run assembly (for the moment only x86_64 is supported).
6
+
7
+A simple program is spawned by the shell, and each instructions are runned in 
8
+the subprocess environment.
9
+
10
+### Instructions
11
+The shell uses the
12
+[GNU assembler `as` (GAS)](https://sourceware.org/binutils/docs-2.40/as/index.html)
13
+from
14
+[GNU Binutils](https://www.gnu.org/software/binutils/), consequently
15
+ instructions syntax follows GAS syntax.
16
+ 
17
+For the moment the shell can only be used in
18
+[AT&T syntax](https://sourceware.org/binutils/docs-2.40/as/i386_002dVariations.html).
19
+
20
+#### Assembly syntax
21
+
22
+Informations on x86 syntax can be found in
23
+[GAS documentation](https://sourceware.org/binutils/docs-2.40/as.html#i386_002dSyntax)
24
+
25
+#### x86_64 assembly documentation
26
+
27
+The list and names of the registers can be found in
28
+[GAS documentation](https://sourceware.org/binutils/docs-2.40/as.html#i386_002dRegs) too.
29
+
30
+The instructions list and documentation can be found in the *1st volume* of
31
+[AMD64 Architecture Programmer’s Manual](https://www.amd.com/en/support/tech-docs/amd64-architecture-programmers-manual-volumes-1-5), in *section 3.3 Instruction summary* or in the Intel's
32
+equivalent document,
33
+[Intel® 64 and IA-32 Architectures Software Developer’s Manual](https://cdrdv2-public.intel.com/774494/325462-sdm-vol-1-2abcd-3abcd.pdf).
34
+
35
+#### Relative jumps
36
+
37
+For the moment there is no way to define symbols, so jumps can only be relative
38
+to the current address. The current address is expressed with the `"."`
39
+character in an expression.
40
+
41
+Relative jumps can be expressed using the syntax :
42
+
43
+```asm
44
+jmp . - 8
45
+jnz . + 32
46
+loop . - 4
47
+```
48
+
49
+### Commands
50
+
51
+Shell commands starts with the "`.`" symbol. You can list all commands using
52
+`.help` or quit the shell using `.quit`.
53
+
54
+## Dependencies
55
+
56
+* [Linux](https://www.kernel.org/)
57
+* [GNU Binutils](https://www.gnu.org/software/binutils/) (GNU `as`)
58
+* [libreadline](https://tiswww.case.edu/php/chet/readline/rltop.html)
59
+
60
+## Compilation
61
+
62
+### Dependencies
63
+
64
+* [GCC](https://www.gnu.org/software/gcc/)
65
+* GNU "Autotools"
66
+  * [make](https://www.gnu.org/software/make/)
67
+  * [autoconf](https://www.gnu.org/software/autoconf/)
68
+  * [automake](https://www.gnu.org/software/automake/)
69
+* [GNU Binutils](https://www.gnu.org/software/binutils/) (GNU `as`)
70
+* [libreadline](https://tiswww.case.edu/php/chet/readline/rltop.html) headers
71
+  
72
+*Optionals dependencies* :
73
+* [check](https://libcheck.github.io/check/)
74
+* [lcov](https://github.com/linux-test-project/lcov.git)
75
+* [Doxygen](http://www.doxygen.nl/)
76
+
77
+### From a release tarball
78
+
79
+```sh
80
+tar -xvf asmsh*.tar.gz
81
+cd asmsh*
82
+./configure
83
+make  -j6
84
+./src/asmsh
85
+```
86
+
87
+### From the git repository
88
+
89
+```sh
90
+git clone https://git.yannweb.net/yannweb/asmsh.git
91
+cd asmsh
92
+./regen.sh
93
+./configure
94
+make -j6
95
+./src/asmsh
96
+```
97
+
98
+
99
+## Examples
100
+
101
+**Exit with a specific status**
102
+
103
+```text
104
+asmsh@0x7f55d2433000 > mov $60, %rax
105
+asmsh@0x7f55d2433005 > mov $0x2a, %rdi
106
+asmsh@0x7f55d243300a > syscall
107
+Child exited with status 42
108
+Exit with status 42
109
+```
110
+
111
+**Print a message to stdout**
112
+
113
+```text
114
+asmsh@0x7f6e312e5000 > mov $0x0a6f6c6c, %rax
115
+asmsh@0x7f6e312e5005 > shl $(8*2), %rax
116
+asmsh@0x7f6e312e5009 > or $0x6548, %rax
117
+asmsh@0x7f6e312e500f > push %rax
118
+asmsh@0x7f6e312e5010 > mov $1, %rax
119
+asmsh@0x7f6e312e5015 > mov %rax, %rdi
120
+asmsh@0x7f6e312e5018 > mov %rsp, %rsi
121
+asmsh@0x7f6e312e501b > mov $6, %rdx
122
+asmsh@0x7f6e312e5020 > syscall
123
+Hello
124
+asmsh@0x7f6e312e5022 > 
125
+```
126
+
127
+**Make a loop and use commands**
128
+
129
+```text
130
+asmsh@0x7f3020bec000 > .regs %rbx
131
+rbx: 0000000000000000
132
+asmsh@0x7f3020bec000 > mov $6, %rcx
133
+asmsh@0x7f3020bec005 > add $0xb, %rbx
134
+asmsh@0x7f3020bec009 > .breakpoint after loop . -4
135
+INFO: Set breakpoint @ 00007F3020BEC00B
136
+asmsh@0x7f3020bec005 > .run
137
+INFO: Breakpoint 00007f3020bec00b reached
138
+asmsh@0x7f3020bec00b > .regs %rbx
139
+rbx: 0000000000000042
140
+```
141
+## Tests & docs
142
+
143
+**Run tests and coverage**
144
+
145
+*Needs [`check`](https://libcheck.github.io/check/)*
146
+
147
+```
148
+make -j8 checks
149
+```
150
+
151
+If [`lcov`](https://github.com/linux-test-project/lcov.git) is installed unit-tests
152
+will generate a coverage report in `lcov_html/index.html`
153
+
154
+**Generate the documentation only**
155
+
156
+*Needs [Doxygen](http://www.doxygen.nl/)*
157
+```
158
+make doxygen
159
+```

+ 1
- 1
configure.ac View File

@@ -2,7 +2,7 @@
2 2
 # Process this file with autoconf to produce a configure script.
3 3
 
4 4
 AC_PREREQ([2.69])
5
-AC_INIT([asmsh], [0.0-dev], [yann.weber@member.fsf.org])
5
+AC_INIT([asmsh], [0.0-dev], [asmsh@yannweb.net])
6 6
 AM_INIT_AUTOMAKE([-Wall])
7 7
 
8 8
 AC_ARG_ENABLE([check],[  --disable-check disable unit test support],

+ 0
- 2321
docs/Doxyfile.in
File diff suppressed because it is too large
View File


+ 1
- 1
docs/Makefile.am View File

@@ -20,7 +20,7 @@ $(stamp): Doxyfile $(top_srcdir)/src/asmsh.h
20 20
 all-local: $(stamp) $(man)
21 21
 
22 22
 clean-local:
23
-	-rm -rf $(top_srcdir)/docs/man $(top_srcdir)/docs/html $(man)
23
+	-rm -rf $(top_srcdir)/docs/man $(top_srcdir)/docs/html
24 24
 
25 25
 CLEANFILES = $(stamp)
26 26
 

+ 1
- 0
regen.sh View File

@@ -4,6 +4,7 @@
4 4
 case $1
5 5
 in
6 6
 	--clean|-c)
7
+		make clean
7 8
 		make distclean
8 9
 		rm -v ar-lib aclocal.m4 "config.h.in~" compile depcomp \
9 10
 			INSTALL install-sh missing test-driver configure \

+ 0
- 60
src/asmsh.s View File

@@ -1,60 +0,0 @@
1
-	.file	"asmsh.c"
2
-	.text
3
-	.section	.rodata
4
-.LC0:
5
-	.string	"Unable to fork :"
6
-	.text
7
-	.globl	main
8
-	.type	main, @function
9
-main:
10
-.LFB6:
11
-	.cfi_startproc
12
-	pushq	%rbp
13
-	.cfi_def_cfa_offset 16
14
-	.cfi_offset 6, -16
15
-	movq	%rsp, %rbp
16
-	.cfi_def_cfa_register 6
17
-	subq	$32, %rsp
18
-	movl	%edi, -20(%rbp)
19
-	movq	%rsi, -32(%rbp)
20
-	call	fork@PLT
21
-	movl	%eax, -4(%rbp)
22
-	cmpl	$0, -4(%rbp)
23
-	jns	.L2
24
-	leaq	.LC0(%rip), %rdi
25
-	call	perror@PLT
26
-	movl	$1, %eax
27
-	jmp	.L3
28
-.L2:
29
-	cmpl	$0, -4(%rbp)
30
-	jne	.L4
31
-	movl	$0, %eax
32
-	call	child_process
33
-.L4:
34
-	movl	$0, %eax
35
-.L3:
36
-	leave
37
-	.cfi_def_cfa 7, 8
38
-	ret
39
-	.cfi_endproc
40
-.LFE6:
41
-	.size	main, .-main
42
-	.globl	child_process
43
-	.type	child_process, @function
44
-child_process:
45
-.LFB7:
46
-	.cfi_startproc
47
-	pushq	%rbp
48
-	.cfi_def_cfa_offset 16
49
-	.cfi_offset 6, -16
50
-	movq	%rsp, %rbp
51
-	.cfi_def_cfa_register 6
52
-	nop
53
-	popq	%rbp
54
-	.cfi_def_cfa 7, 8
55
-	ret
56
-	.cfi_endproc
57
-.LFE7:
58
-	.size	child_process, .-child_process
59
-	.ident	"GCC: (Debian 10.2.1-6) 10.2.1 20210110"
60
-	.section	.note.GNU-stack,"",@progbits

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