akkartik
/
mu
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
mu/examples/ex9.subx

56 lines
2.9 KiB
Plaintext
Raw Normal View History

4808 - clean up comments in all subx files
2018-12-01 00:45:15 +00:00
# Example showing arg order on the stack.
#
4575 New example, just to fix in my head how arguments go on the stack. It's possible I'm still confused about the order callers push args in to the stack. But even if this violates the calling convention, it should still run.
2018-09-21 22:10:34 +00:00
# Show difference between ascii codes of first letter of first arg and first
# letter of second arg.
#
5521
2019-08-20 06:45:04 +00:00
# To run:
4893
2018-12-30 08:36:07 +00:00
# $ ./subx translate examples/ex9.subx -o examples/ex9
# $ ./subx run examples/ex9 z x
4575 New example, just to fix in my head how arguments go on the stack. It's possible I'm still confused about the order callers push args in to the stack. But even if this violates the calling convention, it should still run.
2018-09-21 22:10:34 +00:00
# Expected result:
# $ echo $?
# 2
#
# At the start of a SubX program:
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
# argc: *esp
# argv[0]: *(esp+4)
# argv[1]: *(esp+8)
4575 New example, just to fix in my head how arguments go on the stack. It's possible I'm still confused about the order callers push args in to the stack. But even if this violates the calling convention, it should still run.
2018-09-21 22:10:34 +00:00
# ...
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
# Locals start from esp-4 downwards.
4575 New example, just to fix in my head how arguments go on the stack. It's possible I'm still confused about the order callers push args in to the stack. But even if this violates the calling convention, it should still run.
2018-09-21 22:10:34 +00:00
switch to new syntax for segment headers in C++
2019-05-18 07:00:18 +00:00
== code 0x09000000
4802 Some automated commenting cleanup. Still needs more careful manual scanning. sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx sed -i 's/^# op/# . op/' *.subx */*.subx sed -i 's/# vim/# . . vim/' *.subx */*.subx sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx sed -i 's/^ # call/ # . . call/' *.subx */*.subx sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx sed -i 's/ operand / register /' *.subx */*.subx
2018-11-30 19:10:44 +00:00
# instruction effective address register displacement immediate
# . op subop mod rm32 base index scale r32
# . 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
4780
2018-11-26 08:26:20 +00:00
5410 - 4 examples passing Clean up other examples as well to satisfy the requirements in commit 5404.
2019-07-17 07:47:11 +00:00
Entry:
4802 Some automated commenting cleanup. Still needs more careful manual scanning. sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx sed -i 's/^# op/# . op/' *.subx */*.subx sed -i 's/# vim/# . . vim/' *.subx */*.subx sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx sed -i 's/^ # call/ # . . call/' *.subx */*.subx sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx sed -i 's/ operand / register /' *.subx */*.subx
2018-11-30 19:10:44 +00:00
# . prolog
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
89/copy 3/mod/direct 5/rm32/ebp . . . 4/r32/esp . . # copy esp to ebp
4808 - clean up comments in all subx files
2018-12-01 00:45:15 +00:00
# ascii-difference(argv[1], argv[2])
# . . push argv[2]
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 0xc/disp8 . # push *(ebp+12)
4808 - clean up comments in all subx files
2018-12-01 00:45:15 +00:00
# . . push argv[1]
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
ff 6/subop/push 1/mod/*+disp8 5/rm32/ebp . . . . 8/disp8 . # push *(ebp+8)
4802 Some automated commenting cleanup. Still needs more careful manual scanning. sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx sed -i 's/^# op/# . op/' *.subx */*.subx sed -i 's/# vim/# . . vim/' *.subx */*.subx sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx sed -i 's/^ # call/ # . . call/' *.subx */*.subx sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx sed -i 's/ operand / register /' *.subx */*.subx
2018-11-30 19:10:44 +00:00
# . . call
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
e8/call ascii-difference/disp32
4802 Some automated commenting cleanup. Still needs more careful manual scanning. sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx sed -i 's/^# op/# . op/' *.subx */*.subx sed -i 's/# vim/# . . vim/' *.subx */*.subx sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx sed -i 's/^ # call/ # . . call/' *.subx */*.subx sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx sed -i 's/ operand / register /' *.subx */*.subx
2018-11-30 19:10:44 +00:00
# . . discard args
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
81 0/subop/add 3/mod/direct 4/rm32/esp . . . . . 8/imm32 # add to esp
# syscall(exit, eax)
89/copy 3/mod/direct 3/rm32/ebx . . . 0/r32/eax . . # copy eax to ebx
b8/copy-to-eax 1/imm32/exit
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
cd/syscall 0x80/imm8
4575 New example, just to fix in my head how arguments go on the stack. It's possible I'm still confused about the order callers push args in to the stack. But even if this violates the calling convention, it should still run.
2018-09-21 22:10:34 +00:00
4667 Standardize on hyphens in all names. And we'll use colons for namespacing labels in functions.
2018-10-06 02:49:47 +00:00
ascii-difference: # (s1, s2) : null-terminated ascii strings
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
# a = first letter of s1 (ecx)
8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/esp 4/index/none 0/r32/eax 4/disp8 . # copy *(esp+4) to eax
8b/copy 0/mod/indirect 0/rm32/eax . . . 0/r32/eax . . # copy *eax to eax
# b = first letter of s2 (edx)
8b/copy 1/mod/*+disp8 4/rm32/sib 4/base/esp 4/index/none 1/r32/ecx 8/disp8 # copy *(esp+8) to ecx
8b/copy 0/mod/indirect 1/rm32/ecx . . . 1/r32/ecx . . # copy *ecx to ecx
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
# a-b
5592 - switch register names to lowercase
2019-08-26 18:55:26 +00:00
29/subtract 3/mod/direct 0/rm32/eax . . . 1/r32/ecx . . # subtract ecx from eax
4801 Reindent all SubX code to make some room for the new comment style.
2018-11-30 18:54:42 +00:00
c3/return
4662
2018-10-05 17:42:16 +00:00
5410 - 4 examples passing Clean up other examples as well to satisfy the requirements in commit 5404.
2019-07-17 07:47:11 +00:00
== data 0x0a000000
4802 Some automated commenting cleanup. Still needs more careful manual scanning. sed -i 's/^# 1-3/# . 1-3/' *.subx */*.subx sed -i 's/^# op/# . op/' *.subx */*.subx sed -i 's/# vim/# . . vim/' *.subx */*.subx sed -i 's/^ # push args/ # . . push args/' *.subx */*.subx sed -i 's/^ # discard args/ # . . discard args/' *.subx */*.subx sed -i 's/^ # call/ # . . call/' *.subx */*.subx sed -i 's/^ # prolog/ # . prolog/' *.subx */*.subx sed -i 's/^ # epilog/ # . epilog/' *.subx */*.subx sed -i 's/^ # save registers/ # . save registers/' *.subx */*.subx sed -i 's/^ # restore registers/ # . restore registers/' *.subx */*.subx sed -i 's/ operand / register /' *.subx */*.subx
2018-11-30 19:10:44 +00:00
# . . vim:nowrap:textwidth=0