diff options
Diffstat (limited to 'subx/examples/ex7.subx')
| -rw-r--r-- | subx/examples/ex7.subx | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/subx/examples/ex7.subx b/subx/examples/ex7.subx index 3650817d..e28ff89b 100644 --- a/subx/examples/ex7.subx +++ b/subx/examples/ex7.subx @@ -1,4 +1,5 @@ -## example showing file syscalls +# Example showing file syscalls. +# # Create a file, open it for writing, write a character to it, close it, open # it for reading, read a character from it, close it, delete it, and return # the character read. @@ -32,20 +33,20 @@ 89/copy 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to *EBX # syscall(write, Stream, "a", 1) - # load stream + # . load stream bb/copy-to-EBX Stream/imm32 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX - # + # . b9/copy-to-ECX A/imm32 ba/copy-to-EDX 1/imm32/size b8/copy-to-EAX 4/imm32/write cd/syscall 0x80/imm8 # syscall(close, Stream) - # load stream + # . load stream bb/copy-to-EBX Stream/imm32 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX - # + # . b8/copy-to-EAX 6/imm32/close cd/syscall 0x80/imm8 @@ -55,22 +56,22 @@ ba/copy-to-EDX 0x180/imm32/fixed-perms b8/copy-to-EAX 5/imm32/open cd/syscall 0x80/imm8 - # save Stream + # . save Stream bb/copy-to-EBX Stream/imm32 89/copy 0/mod/indirect 3/rm32/EBX . . . 0/r32/EAX . . # copy EAX to *EBX # syscall(read, Stream, B, 1) - # load stream + # . load stream bb/copy-to-EBX Stream/imm32 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX - # + # . b9/copy-to-ECX B/imm32 ba/copy-to-EDX 1/imm32/size b8/copy-to-EAX 3/imm32/read cd/syscall 0x80/imm8 # syscall(close, Stream) - # load stream + # . load stream bb/copy-to-EBX Stream/imm32 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # @@ -83,7 +84,7 @@ cd/syscall 0x80/imm8 # syscall(exit, b) - # load b + # . load b bb/copy-to-EBX B/imm32 8b/copy 0/mod/indirect 3/rm32/EBX . . . 3/r32/EBX . . # copy *EBX to EBX # |