diff options
| author | Kartik Agaram <vc@akkartik.com> | 2019-09-11 19:04:49 -0700 |
|---|---|---|
| committer | Kartik Agaram <vc@akkartik.com> | 2019-09-11 19:53:23 -0700 |
| commit | ecfbbfb5b58aaba9f9265cb13b9fb4a914bdcf37 (patch) | |
| tree | 486cd5f4ee75323b5c733912c7a58501d65b0325 /examples/ex5.subx | |
| parent | 4d53de8afa0d44e29d3caeb01ccdd02bc2e4cd70 (diff) | |
| download | mu-ecfbbfb5b58aaba9f9265cb13b9fb4a914bdcf37.tar.gz | |
5647 - experimental support for swapping OS
Diffstat (limited to 'examples/ex5.subx')
| -rw-r--r-- | examples/ex5.subx | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/examples/ex5.subx b/examples/ex5.subx index ad9ad29b..0ea9c5ee 100644 --- a/examples/ex5.subx +++ b/examples/ex5.subx @@ -4,7 +4,7 @@ # $ ./subx translate examples/ex5.subx -o examples/ex5 # $ ./subx run examples/ex5 -== code 0x09000000 +== code # 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 @@ -14,7 +14,7 @@ Entry: # allocate x on the stack 81 5/subop/subtract 3/mod/direct 4/rm32/esp . . . . . 4/imm32 # subtract from esp - # syscall(read, stdin, x, 1) + # read(stdin, x, 1) # . fd = 0 (stdin) bb/copy-to-ebx 0/imm32 # . data = x (location to write result to) @@ -22,8 +22,7 @@ Entry: # . size = 1 character ba/copy-to-edx 1/imm32 # . syscall - b8/copy-to-eax 3/imm32/read - cd/syscall 0x80/imm8 + e8/call syscall_read/disp32 # syscall(write, stdout, x, 1) # . fd = 1 (stdout) @@ -36,10 +35,7 @@ Entry: b8/copy-to-eax 4/imm32/write cd/syscall 0x80/imm8 - # syscall(exit, ebx) - b8/copy-to-eax 1/imm32/exit - cd/syscall 0x80/imm8 - -== data 0x0a000000 + # exit(ebx) + e8/call syscall_exit/disp32 # . . vim:nowrap:textwidth=0 |