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compare: xenia:f4a7e18b2803ff65eb4182a248028bef6cda7546
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xenia:main

10 Commits
bb3d709ad6 ... f4a7e18b28

Author SHA1 Message Date
xenia
f4a7e18b28 Update github workflow to use nix 2024-02-03 16:03:24 +01:00
xenia
49e9dbff85 Include .def file in out/dev, make dev-only package 2024-02-03 16:03:24 +01:00
xenia
f537f9a2d8 flakeify 2024-02-03 16:03:22 +01:00
Ry
f8e2fa453b
Merge pull request #13 from mebibytedraco/command-asm-refactor 
Refactor monitor/commands/commands.asm
 2023-12-22 20:47:56 -08:00
mebibytedraco
da4adbb916 Refactor monitor/commands/commands.asm 2023-12-22 23:16:57 -05:00
Ry
70a9006fb3
Merge pull request #12 from mebibytedraco/monitor-refactor 
Refactor system_breakpoint_handler and add 'reg' command to monitor
 2023-12-22 14:25:10 -08:00
mebibytedraco
e28e8eceb0 Move register printout into new 'reg' command 2023-12-22 17:12:22 -05:00
mebibytedraco
09c0d8c215 Remove save/restore of r0-r31 from monitor code 
Because the monitor is now only called from system_breakpoint_handler
(which already saves and restores all of the registers), it is now
unneccessary to save and restore all of the registers in the monitor.
 2023-12-22 16:34:06 -05:00
mebibytedraco
57409ecb6e Make F12 trigger breakpoint 2023-12-22 15:52:35 -05:00
mebibytedraco
b1aa77aa70 Refactor system_breakpoint_handler 
Modifies system_breakpoint_handler so that all fox32 registers are saved
on the stack in a predictable order, and they are printed using a loop.
Also comments out two seemingly unneccessary additions in the monitor's
hex printing functions.
 2023-12-22 15:20:53 -05:00
12 changed files with 342 additions and 649 deletions
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1
.envrc Normal file
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@ -0,0 +1 @@
use flake

18
.github/workflows/fox32rom-unstable.yml vendored
View File

@ -4,7 +4,7 @@ on:
branches: branches:
- main - main
name: fox32rom Unstable name: fox32rom
jobs: jobs:
fox32rom-unstable-linux: fox32rom-unstable-linux:
@ -12,27 +12,21 @@ jobs:
runs-on: ubuntu-latest runs-on: ubuntu-latest
steps: steps:
- uses: actions/checkout@v3 - uses: actions/checkout@v3
- uses: cachix/install-nix-action@v22
- name: Download latest fox32asm artifact
uses: dawidd6/action-download-artifact@v2
with: with:
repo: fox32-arch/fox32asm github_access_token: ${{ secrets.GITHUB_TOKEN }}
workflow: fox32asm-unstable-linux.yml
workflow_conclusion: success
- name: Build - name: Build
run: | run: nix build .#fox32rom
chmod +x fox32asm/fox32asm
fox32asm/fox32asm main.asm fox32.rom
- name: Upload fox32.rom - name: Upload fox32.rom
uses: actions/upload-artifact@v2 uses: actions/upload-artifact@v2
with: with:
name: fox32.rom name: fox32.rom
path: fox32.rom path: result/bin/fox32.rom
- name: Upload fox32rom.def - name: Upload fox32rom.def
uses: actions/upload-artifact@v2 uses: actions/upload-artifact@v2
with: with:
name: fox32rom.def name: fox32rom.def
path: fox32rom.def path: result/dev/fox32rom.def

509
exception.asm
View File

@ -41,12 +41,14 @@ system_page_fault_handler:
system_page_fault_str: data.str "Page fault at virtual address r1" data.8 10 data.8 0 system_page_fault_str: data.str "Page fault at virtual address r1" data.8 10 data.8 0
; called upon execution of a `brk` instruction ; called upon execution of a `brk` instruction
; ensure the stack has at least 256 bytes of free space before triggering this exception!! ; ensure the stack has at least 128 bytes of free space before triggering this exception!!
; this code is extremely ugly, but it works :P
system_breakpoint_handler: system_breakpoint_handler:
add rsp, 4 add rsp, 4
; push all registers once to save them ; push all registers once to save them
push rfp
push resp
push rsp
push r31 push r31
push r30 push r30
push r29 push r29
@ -80,471 +82,16 @@ system_breakpoint_handler:
push r1 push r1
push r0 push r0
; then push all registers again so they can be popped one by one to print to the monitor ; modify the saved rsp value to reflect the value of rsp before the
push r31 ; interrupt occured
push r30 ; resp (4) + rfp (4) + flags (1) + return address (4) = 13 bytes
push r29 add [rsp+128], 13
push r28
push r27
push r26
push r25
push r24
push r23
push r22
push r21
push r20
push r19
push r18
push r17
push r16
push r15
push r14
push r13
push r12
push r11
push r10
push r9
push r8
push r7
push r6
push r5
push r4
push r3
push r2
push r1
push r0
; print breakpoint message
mov r0, system_breakpoint_str mov r0, system_breakpoint_str
call debug_print call debug_print
call print_string_to_monitor call print_string_to_monitor
; r0
mov r0, system_breakpoint_r0_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r1
mov r0, system_breakpoint_r1_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r2
mov r0, system_breakpoint_r2_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r3
mov r0, system_breakpoint_r3_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r4
mov r0, system_breakpoint_r4_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r5
mov r0, system_breakpoint_r5_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r6
mov r0, system_breakpoint_r6_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r7
mov r0, system_breakpoint_r7_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r8
mov r0, system_breakpoint_r8_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r9
mov r0, system_breakpoint_r9_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r10
mov r0, system_breakpoint_r10_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r11
mov r0, system_breakpoint_r11_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r12
mov r0, system_breakpoint_r12_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r13
mov r0, system_breakpoint_r13_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r14
mov r0, system_breakpoint_r14_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r15
mov r0, system_breakpoint_r15_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r16
mov r0, system_breakpoint_r16_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r17
mov r0, system_breakpoint_r17_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r18
mov r0, system_breakpoint_r18_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r19
mov r0, system_breakpoint_r19_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r20
mov r0, system_breakpoint_r20_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r21
mov r0, system_breakpoint_r21_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r22
mov r0, system_breakpoint_r22_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r23
mov r0, system_breakpoint_r23_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r24
mov r0, system_breakpoint_r24_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r25
mov r0, system_breakpoint_r25_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r26
mov r0, system_breakpoint_r26_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r27
mov r0, system_breakpoint_r27_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; r28
mov r0, system_breakpoint_r28_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r29
mov r0, system_breakpoint_r29_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r30
mov r0, system_breakpoint_r30_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; r31
mov r0, system_breakpoint_r31_str
call print_string_to_monitor
pop r0
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
; rsp
mov r0, system_breakpoint_rsp_str
call print_string_to_monitor
mov r0, rsp
add r0, 133 ; account for the registers pushed above, and for the int calling convention
call print_hex_word_to_monitor
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
call print_character_to_monitor
; rip
mov r0, system_breakpoint_rip_str
call print_string_to_monitor
mov r0, rsp
add r0, 129 ; read instruction pointer from the stack
mov r0, [r0]
call print_hex_word_to_monitor
; ---
mov r0, 10
call print_character_to_monitor
; ---
call invoke_monitor call invoke_monitor
pop r0 pop r0
@ -579,39 +126,9 @@ system_breakpoint_handler:
pop r29 pop r29
pop r30 pop r30
pop r31 pop r31
; don't restore rsp and resp. not sure whether restoring a potentially
; modified resp would break things, but changing rsp definitely would.
add rsp, 8
pop rfp
reti reti
system_breakpoint_str: data.str "Breakpoint reached!" data.8 10 data.8 0 system_breakpoint_str: data.str "Breakpoint reached!" data.8 10 data.8 0
system_breakpoint_r0_str: data.strz "r0: "
system_breakpoint_r1_str: data.strz "r1: "
system_breakpoint_r2_str: data.strz "r2: "
system_breakpoint_r3_str: data.strz "r3: "
system_breakpoint_r4_str: data.strz "r4: "
system_breakpoint_r5_str: data.strz "r5: "
system_breakpoint_r6_str: data.strz "r6: "
system_breakpoint_r7_str: data.strz "r7: "
system_breakpoint_r8_str: data.strz "r8: "
system_breakpoint_r9_str: data.strz "r9: "
system_breakpoint_r10_str: data.strz "r10: "
system_breakpoint_r11_str: data.strz "r11: "
system_breakpoint_r12_str: data.strz "r12: "
system_breakpoint_r13_str: data.strz "r13: "
system_breakpoint_r14_str: data.strz "r14: "
system_breakpoint_r15_str: data.strz "r15: "
system_breakpoint_r16_str: data.strz "r16: "
system_breakpoint_r17_str: data.strz "r17: "
system_breakpoint_r18_str: data.strz "r18: "
system_breakpoint_r19_str: data.strz "r19: "
system_breakpoint_r20_str: data.strz "r20: "
system_breakpoint_r21_str: data.strz "r21: "
system_breakpoint_r22_str: data.strz "r22: "
system_breakpoint_r23_str: data.strz "r23: "
system_breakpoint_r24_str: data.strz "r24: "
system_breakpoint_r25_str: data.strz "r25: "
system_breakpoint_r26_str: data.strz "r26: "
system_breakpoint_r27_str: data.strz "r27: "
system_breakpoint_r28_str: data.strz "r28: "
system_breakpoint_r29_str: data.strz "r29: "
system_breakpoint_r30_str: data.strz "r30: "
system_breakpoint_r31_str: data.strz "r31: "
system_breakpoint_rsp_str: data.strz "rsp: "
system_breakpoint_rip_str: data.strz "rip: "

126
flake.lock Normal file
View File

@ -0,0 +1,126 @@
{
"nodes": {
"flake-utils": {
"inputs": {
"systems": "systems"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"flake-utils_2": {
"inputs": {
"systems": "systems_2"
},
"locked": {
"lastModified": 1694529238,
"narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
"owner": "numtide",
"repo": "flake-utils",
"rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
"type": "github"
},
"original": {
"owner": "numtide",
"repo": "flake-utils",
"type": "github"
}
},
"fox32asm": {
"inputs": {
"flake-utils": "flake-utils_2",
"nixpkgs": "nixpkgs"
},
"locked": {
"lastModified": 1706972401,
"narHash": "sha256-HrbsibEnxC8va3LJhA6B8fDabxFRcmTk1or2pOKxlYo=",
"ref": "refs/heads/main",
"rev": "bfd40db93b6cc5ec67517286e6c32a5bd8ecc702",
"revCount": 67,
"type": "git",
"url": "https://githug.xyz/xenia/fox32asm"
},
"original": {
"type": "git",
"url": "https://githug.xyz/xenia/fox32asm"
}
},
"nixpkgs": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"nixpkgs_2": {
"locked": {
"lastModified": 1697009197,
"narHash": "sha256-viVRhBTFT8fPJTb1N3brQIpFZnttmwo3JVKNuWRVc3s=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "01441e14af5e29c9d27ace398e6dd0b293e25a54",
"type": "github"
},
"original": {
"id": "nixpkgs",
"type": "indirect"
}
},
"root": {
"inputs": {
"flake-utils": "flake-utils",
"fox32asm": "fox32asm",
"nixpkgs": "nixpkgs_2"
}
},
"systems": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
},
"systems_2": {
"locked": {
"lastModified": 1681028828,
"narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
"owner": "nix-systems",
"repo": "default",
"rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
"type": "github"
},
"original": {
"owner": "nix-systems",
"repo": "default",
"type": "github"
}
}
},
"root": "root",
"version": 7
}

35
flake.nix Normal file
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@ -0,0 +1,35 @@
{
description = "fox32rom";
inputs = {
fox32asm.url = "git+https://githug.xyz/xenia/fox32asm";
flake-utils.url = "github:numtide/flake-utils";
};
outputs = { self, nixpkgs, fox32asm, flake-utils }:
flake-utils.lib.eachDefaultSystem (sys:
let pkgs = nixpkgs.legacyPackages.${sys};
asm = fox32asm.packages.${sys}.default;
fox32rom = pkgs.runCommand "fox32rom" {} ''
cp -r ${./.}/* ./
mkdir -p $out/{bin,dev}
${asm}/bin/fox32asm ./main.asm $out/bin/fox32.rom
cp ${./fox32rom.def} $out/dev/fox32rom.def
'';
fox32rom-dev = pkgs.runCommand "fox32rom-dev" {} ''
mkdir -p $out/dev
cp ${./fox32rom.def} $out/dev/fox32rom.def
'';
in rec {
packages.fox32rom = fox32rom;
packages.fox32rom-dev = fox32rom-dev;
packages.default = fox32rom;
devShells.default = pkgs.mkShell {
packages = [ asm ];
};
}
);
}

8
keyboard.asm
View File

@ -2,6 +2,10 @@
; add events to the event queue if a key was pressed or released ; add events to the event queue if a key was pressed or released
; this should only be called by system_vsync_handler ; this should only be called by system_vsync_handler
; inputs:
; none
; outputs:
; r0: non-zero if F12 was pressed, zero otherwise
keyboard_update: keyboard_update:
; pop a key from the keyboard queue ; pop a key from the keyboard queue
in r0, 0x80000500 in r0, 0x80000500
@ -10,7 +14,7 @@ keyboard_update:
; invoke the debug monitor if F12 was pressed ; invoke the debug monitor if F12 was pressed
cmp r0, 0x58 cmp r0, 0x58
ifz jmp invoke_monitor ifz jmp keyboard_update_end
; check if this is a make or break scancode ; check if this is a make or break scancode
bts r0, 7 bts r0, 7
@ -25,6 +29,7 @@ keyboard_update:
mov r6, 0 mov r6, 0
mov r7, 0 mov r7, 0
call new_event call new_event
mov r0, 0
jmp keyboard_update_end jmp keyboard_update_end
keyboard_update_break_scancode: keyboard_update_break_scancode:
and r0, 0x7F and r0, 0x7F
@ -37,5 +42,6 @@ keyboard_update_break_scancode:
mov r6, 0 mov r6, 0
mov r7, 0 mov r7, 0
call new_event call new_event
mov r0, 0
keyboard_update_end: keyboard_update_end:
ret ret

71
monitor/commands/commands.asm
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@ -1,48 +1,20 @@
; command parser ; command parser
; FIXME: thjs is a terrible way to do this
monitor_shell_parse_command: monitor_shell_parse_command:
mov r0, MONITOR_SHELL_TEXT_BUF_BOTTOM mov r0, MONITOR_SHELL_TEXT_BUF_BOTTOM
; exit ; loop over the table of commands
mov r1, monitor_shell_exit_command_string mov r2, monitor_shell_command_table
monitor_shell_parse_command_loop:
mov r1, [r2]
call compare_string call compare_string
ifz jmp monitor_shell_exit_command ; if the string matches, jump to the corresponding address in the table
ifz jmp [r2+4]
; help ; otherwise, move to the next entry
mov r1, monitor_shell_help_command_string add r2, 8
call compare_string ; if the entry is zero, then we have reached the end of the table
ifz jmp monitor_shell_help_command cmp [r2], 0
ifnz jmp monitor_shell_parse_command_loop
; jump
mov r1, monitor_shell_jump_command_string
call compare_string
ifz jmp monitor_shell_jump_command
; list
mov r1, monitor_shell_list_command_string
call compare_string
ifz jmp monitor_shell_list_command
; load
mov r1, monitor_shell_load_command_string
call compare_string
ifz jmp monitor_shell_load_command
; set.8
mov r1, monitor_shell_set8_command_string
call compare_string
ifz jmp monitor_shell_set8_command
; set.16
mov r1, monitor_shell_set16_command_string
call compare_string
ifz jmp monitor_shell_set16_command
; set.32
mov r1, monitor_shell_set32_command_string
call compare_string
ifz jmp monitor_shell_set32_command
; invalid command ; invalid command
mov r0, monitor_shell_invalid_command_string mov r0, monitor_shell_invalid_command_string
@ -51,6 +23,26 @@ monitor_shell_parse_command:
ret ret
monitor_shell_command_table:
data.32 monitor_shell_exit_command_string
data.32 monitor_shell_exit_command
data.32 monitor_shell_help_command_string
data.32 monitor_shell_help_command
data.32 monitor_shell_jump_command_string
data.32 monitor_shell_jump_command
data.32 monitor_shell_list_command_string
data.32 monitor_shell_list_command
data.32 monitor_shell_load_command_string
data.32 monitor_shell_load_command
data.32 monitor_shell_reg_command_string
data.32 monitor_shell_reg_command
data.32 monitor_shell_set8_command_string
data.32 monitor_shell_set8_command
data.32 monitor_shell_set16_command_string
data.32 monitor_shell_set16_command
data.32 monitor_shell_set32_command_string
data.32 monitor_shell_set32_command
data.32 0 data.32 0
monitor_shell_invalid_command_string: data.str "invalid command" data.8 10 data.8 0 monitor_shell_invalid_command_string: data.str "invalid command" data.8 10 data.8 0
; all commands ; all commands
@ -59,4 +51,5 @@ monitor_shell_invalid_command_string: data.str "invalid command" data.8 10 data.
#include "monitor/commands/jump.asm" #include "monitor/commands/jump.asm"
#include "monitor/commands/list.asm" #include "monitor/commands/list.asm"
#include "monitor/commands/load.asm" #include "monitor/commands/load.asm"
#include "monitor/commands/reg.asm"
#include "monitor/commands/set.asm" #include "monitor/commands/set.asm"

1
monitor/commands/help.asm
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@ -16,5 +16,6 @@ monitor_shell_help_text:
data.str "jump | jump to address $0" data.8 10 data.str "jump | jump to address $0" data.8 10
data.str "list | list memory contents starting at address $0" data.8 10 data.str "list | list memory contents starting at address $0" data.8 10
data.str "load | load disk $0's sector $1 to buffer at address $2 of size $3 sectors" data.8 10 data.str "load | load disk $0's sector $1 to buffer at address $2 of size $3 sectors" data.8 10
data.str "reg | list contents of all registers" data.8 10
data.str "set.SZ | set [$0] to $1; equivalent to `mov.SZ [$0], $1`" data.8 10 data.str "set.SZ | set [$0] to $1; equivalent to `mov.SZ [$0], $1`" data.8 10
data.8 0 data.8 0

102
monitor/commands/reg.asm Normal file
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@ -0,0 +1,102 @@
; reg command
monitor_shell_reg_command_string: data.strz "reg"
monitor_shell_reg_command:
push r0
push r1
push r2
push r3
; print the display containing all of the registers
; r1 - used to store a pointer to the current string
; r2 - stores the current address on the stack
; r3 - loop counter
mov r1, monitor_shell_reg_command_r0_str
mov r2, [MONITOR_OLD_RSP]
inc r2, 4
mov r3, 0
monitor_shell_reg_command_print_loop:
; print the register label
mov r0, r1
call print_string_to_monitor
; print the register value
mov r0, [r2]
call print_hex_word_to_monitor
; adjust string pointer, stack address, and loop counter
add r1, MONITOR_SHELL_COMMAND_R_STR_SIZE
inc r2, 4
inc r3
; decide whether to print a separator or a newline by checking if the loop
; counter is a multiple of 4
mov r0, r3
and r0, 0x03
ifnz jmp monitor_shell_reg_command_print_sep
monitor_shell_reg_command_print_newline:
mov r0, 10
jmp monitor_shell_reg_command_print_last_char
monitor_shell_reg_command_print_sep:
mov r0, ' '
call print_character_to_monitor
mov r0, '|'
call print_character_to_monitor
mov r0, ' '
monitor_shell_reg_command_print_last_char:
call print_character_to_monitor
; loop again if not on last register
cmp r3, 35
iflt jmp monitor_shell_reg_command_print_loop
; print rip
mov r0, monitor_shell_reg_command_rip_str
call print_string_to_monitor
mov r0, [r2+1]
call print_hex_word_to_monitor
mov r0, 10
call print_character_to_monitor
call redraw_monitor_console
pop r3
pop r2
pop r1
pop r0
ret
const MONITOR_SHELL_COMMAND_R_STR_SIZE: 7
monitor_shell_reg_command_r0_str: data.strz "r0: "
monitor_shell_reg_command_r1_str: data.strz "r1: "
monitor_shell_reg_command_r2_str: data.strz "r2: "
monitor_shell_reg_command_r3_str: data.strz "r3: "
monitor_shell_reg_command_r4_str: data.strz "r4: "
monitor_shell_reg_command_r5_str: data.strz "r5: "
monitor_shell_reg_command_r6_str: data.strz "r6: "
monitor_shell_reg_command_r7_str: data.strz "r7: "
monitor_shell_reg_command_r8_str: data.strz "r8: "
monitor_shell_reg_command_r9_str: data.strz "r9: "
monitor_shell_reg_command_r10_str: data.strz "r10: "
monitor_shell_reg_command_r11_str: data.strz "r11: "
monitor_shell_reg_command_r12_str: data.strz "r12: "
monitor_shell_reg_command_r13_str: data.strz "r13: "
monitor_shell_reg_command_r14_str: data.strz "r14: "
monitor_shell_reg_command_r15_str: data.strz "r15: "
monitor_shell_reg_command_r16_str: data.strz "r16: "
monitor_shell_reg_command_r17_str: data.strz "r17: "
monitor_shell_reg_command_r18_str: data.strz "r18: "
monitor_shell_reg_command_r19_str: data.strz "r19: "
monitor_shell_reg_command_r20_str: data.strz "r20: "
monitor_shell_reg_command_r21_str: data.strz "r21: "
monitor_shell_reg_command_r22_str: data.strz "r22: "
monitor_shell_reg_command_r23_str: data.strz "r23: "
monitor_shell_reg_command_r24_str: data.strz "r24: "
monitor_shell_reg_command_r25_str: data.strz "r25: "
monitor_shell_reg_command_r26_str: data.strz "r26: "
monitor_shell_reg_command_r27_str: data.strz "r27: "
monitor_shell_reg_command_r28_str: data.strz "r28: "
monitor_shell_reg_command_r29_str: data.strz "r29: "
monitor_shell_reg_command_r30_str: data.strz "r30: "
monitor_shell_reg_command_r31_str: data.strz "r31: "
monitor_shell_reg_command_rsp_str: data.strz "rsp: "
monitor_shell_reg_command_resp_str: data.strz "resp: "
monitor_shell_reg_command_rfp_str: data.strz "rfp: "
monitor_shell_reg_command_rip_str: data.strz "rip: "

4
monitor/console.asm
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@ -38,7 +38,7 @@ print_hex_word_to_monitor_loop:
add r12, r11 add r12, r11
movz.8 r0, [r12] movz.8 r0, [r12]
call print_character_to_monitor call print_character_to_monitor
add r1, r6 ;add r1, r6
loop print_hex_word_to_monitor_loop loop print_hex_word_to_monitor_loop
pop r31 pop r31
@ -67,7 +67,7 @@ print_hex_byte_to_monitor_loop:
add r12, r11 add r12, r11
movz.8 r0, [r12] movz.8 r0, [r12]
call print_character_to_monitor call print_character_to_monitor
add r1, r6 ;add r1, r6
loop print_hex_byte_to_monitor_loop loop print_hex_byte_to_monitor_loop
pop r31 pop r31

100
monitor/monitor.asm
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@ -1,43 +1,11 @@
; debug monitor ; debug monitor
; only call this from system_breakpoint_handler!
invoke_monitor: invoke_monitor:
; return if we're already in the monitor ; return if we're already in the monitor
cmp [0x000003FC], monitor_vsync_handler cmp [0x000003FC], monitor_vsync_handler
ifz jmp invoke_monitor_aleady_in_monitor ifz jmp invoke_monitor_aleady_in_monitor
push r31
push r30
push r29
push r28
push r27
push r26
push r25
push r24
push r23
push r22
push r21
push r20
push r19
push r18
push r17
push r16
push r15
push r14
push r13
push r12
push r11
push r10
push r9
push r8
push r7
push r6
push r5
push r4
push r3
push r2
push r1
push r0
; set the vsync handler to our own and reenable interrupts ; set the vsync handler to our own and reenable interrupts
mov [MONITOR_OLD_VSYNC_HANDLER], [0x000003FC] mov [MONITOR_OLD_VSYNC_HANDLER], [0x000003FC]
mov [0x000003FC], monitor_vsync_handler mov [0x000003FC], monitor_vsync_handler
@ -94,39 +62,6 @@ exit_monitor:
call enable_cursor call enable_cursor
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
ret ret
exit_monitor_and_jump: exit_monitor_and_jump:
@ -140,39 +75,6 @@ exit_monitor_and_jump:
; save the jump address in a temporary location ; save the jump address in a temporary location
mov [MONITOR_OLD_RSP], r0 mov [MONITOR_OLD_RSP], r0
pop r0
pop r1
pop r2
pop r3
pop r4
pop r5
pop r6
pop r7
pop r8
pop r9
pop r10
pop r11
pop r12
pop r13
pop r14
pop r15
pop r16
pop r17
pop r18
pop r19
pop r20
pop r21
pop r22
pop r23
pop r24
pop r25
pop r26
pop r27
pop r28
pop r29
pop r30
pop r31
jmp [MONITOR_OLD_RSP] jmp [MONITOR_OLD_RSP]
invoke_monitor_aleady_in_monitor: invoke_monitor_aleady_in_monitor:

16
vsync.asm
View File

@ -15,6 +15,9 @@ system_vsync_handler:
call keyboard_update call keyboard_update
cmp.8 [UPDATE_ICON], 0 cmp.8 [UPDATE_ICON], 0
ifnz call icon_update ifnz call icon_update
; check if monitor should be started
cmp r0, 0
ifnz jmp system_vsync_handler_breakpoint
pop r7 pop r7
pop r6 pop r6
@ -25,3 +28,16 @@ system_vsync_handler:
pop r1 pop r1
pop r0 pop r0
reti reti
system_vsync_handler_breakpoint:
pop r7
pop r6
pop r5
pop r4
pop r3
pop r2
pop r1
pop r0
; breakpoint handler expects that there is an extra 4 bytes on the stack
sub rsp, 4
jmp system_breakpoint_handler