mu/linux/ex2.subx

# Add 3 and 4, and return the result in the exit code.
#
# To run:
#   $ bootstrap/bootstrap translate ex2.subx -o ex2
#   $ bootstrap/bootstrap run ex2
# Expected result:
#   $ echo $?
#   2

== code

Entry:
# ebx = 3
bb/copy-to-ebx  3/imm32
# add 4 to ebx
81 0/subop/add 3/mod/direct 3/rm32/ebx 4/imm32
# exit(ebx)
e8/call  syscall_exit/disp32

# . . vim:nowrap:textwidth=0
6618 - new docs 2020-07-05 22:28:37 +00:00			`# Add 3 and 4, and return the result in the exit code.`
4392 2018-07-24 18:53:45 +00:00			`#`
5521 2019-08-20 06:45:04 +00:00			`# To run:`
. 2021-03-30 01:47:52 +00:00			`# $ bootstrap/bootstrap translate ex2.subx -o ex2`
7847 2021-03-04 08:24:24 +00:00			`# $ bootstrap/bootstrap run ex2`
4396 Fix ex4 binary, which has been corrupted in the repo since commit 4356. In this time it hasn't changed further. The correct version added here is also the file that should have been committed then. 2018-07-25 03:39:59 +00:00			`# Expected result:`
			`# $ echo $?`
			`# 2`
4317 - example program: simple addition 2018-07-07 06:34:10 +00:00
5647 - experimental support for swapping OS 2019-09-12 02:04:49 +00:00			`== code`
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:`
6618 - new docs 2020-07-05 22:28:37 +00:00			`# ebx = 3`
			`bb/copy-to-ebx 3/imm32`
			`# add 4 to ebx`
			`81 0/subop/add 3/mod/direct 3/rm32/ebx 4/imm32`
5647 - experimental support for swapping OS 2019-09-12 02:04:49 +00:00			`# exit(ebx)`
			`e8/call syscall_exit/disp32`
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
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`