minor changes, redoing makefile, meminfo program
This commit is contained in:
parent
73bb0e4864
commit
b8284137d4
16 changed files with 192 additions and 98 deletions
17
doc/ints.txt
17
doc/ints.txt
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@ -11,6 +11,7 @@ args in ebx, ecx, edx, esi, edi
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result in eax
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note: do not assume eax is unmodified if there is no value to be returned
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modifies ecx, edx
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see table 1
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file system calls have units of bytes unless otherwise specified
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functions returning handles or pointers use 0 to indicate error
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@ -20,6 +21,8 @@ see keys.txt for the return type of the "get key" system call
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invalid system call numbers change eax to -1, and have no other effect.
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table 1:
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function | eax | eax out | ebx | ecx | edx | esi | edi
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---------------|-----|---------------|---------------|-------------|-------|--------|-----
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open file | 0x0 | handle | drive number | path | | |
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@ -30,3 +33,17 @@ invalid system call numbers change eax to -1, and have no other effect.
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log string | 0x5 | | sz string | | | |
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get key | 0x6 | keycode | | | | |
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allocate ram | 0x7 | start pointer | pages | | | |
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memory info | 0x8 | see table 2 | see table 2 | | | |
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table 2:
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all values are in units of pages
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eax -1 indicates unrecognized ebx
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ebx | eax out
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-----|--------------------------
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0x0 | kernel dynamic area size
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0x1 | kernel dynamic area left
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0x2 | total userspace size
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0x3 | total userspace left
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0x4 | this process memory left
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@ -1 +1,2 @@
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BIN/MEMINFO.ELF
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BIN/HELLO.ELF
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115
makefile
115
makefile
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@ -1,5 +1,13 @@
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disk: kernel boot skel init hello
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mkdir -p obj out
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kgccargs = -Wall -Wsuggest-attribute=pure -Wsuggest-attribute=const -Wsuggest-attribute=malloc -m32 -Og -ffreestanding -fno-asynchronous-unwind-tables
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ugccargs = ${kgccargs} -Isrc/user/include
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nasmargs = -f elf32
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partlink = -r -m elf_i386
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out/disk.vdi: out/disk.img
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VBoxManage convertfromraw out/disk.img out/disk.vdi --uuid a61929ed-3bf2-45ff-b98a-44f87c616dba
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out/disk.img: out/kernel.bin out/boot.bin out/fs
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mkdir -p obj
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/sbin/mkfs.fat -C -f 1 -F 16 -n "PORTLAND OS" -R 65 -s 1 -S 512 obj/shadow.img 8192
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echo -n -e '\xeb\x3c' > obj/jmp.bin
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dd if=obj/jmp.bin of=obj/shadow.img obs=2 conv=notrunc
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@ -8,78 +16,59 @@ disk: kernel boot skel init hello
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mv obj/shadow.img out/disk.img
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mcopy -i out/disk.img -s out/fs/* ::/
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vdi-file: disk
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VBoxManage convertfromraw out/disk.img out/disk.vdi --uuid a61929ed-3bf2-45ff-b98a-44f87c616dba
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debug: disk
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debug: out/disk.img
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gdb -x qemu-debug.gdb
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clean:
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rm -r obj out || true
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skel:
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mkdir -p out/fs
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out/fs: obj/hello.elf obj/init.elf obj/meminfo.elf
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mkdir -p out/fs/bin
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cp -r fs-skel/* out/fs/
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kgccargs = -Wall -Wsuggest-attribute=pure -Wsuggest-attribute=const -Wsuggest-attribute=malloc -m32 -Og -ffreestanding -fno-asynchronous-unwind-tables
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ugccargs = ${kgccargs} -Isrc/user/include
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nasmargs = -f elf32
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partlink = -r -m elf_i386
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init: knob
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mkdir -p obj/init out/fs/bin
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gcc ${ugccargs} -c src/user/init/main.c -o obj/init/main.o
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ld -T src/user/elf.ld obj/init/main.o obj/knob.o -o obj/init.elf
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objcopy -S obj/init.elf out/fs/bin/init.elf
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hello: knob
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mkdir -p obj/hello out/fs/bin
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gcc ${ugccargs} -c src/user/hello/hello.c -o obj/hello/hello.o
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ld -T src/user/elf.ld obj/hello/hello.o obj/knob.o -o obj/hello.elf
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objcopy -S obj/hello.elf out/fs/bin/hello.elf
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objcopy -S obj/init.elf out/fs/bin/init.elf
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objcopy -S obj/meminfo.elf out/fs/bin/meminfo.elf
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knob:
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mkdir -p obj/knob
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obj/kernel/%.ko: src/kernel/%.c
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mkdir -p $(shell dirname $@)
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gcc ${kgccargs} -c $< -o $@
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gcc ${ugccargs} -c src/user/knob/env.c -o obj/knob/env.o
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gcc ${ugccargs} -c src/user/knob/file.c -o obj/knob/file.o
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gcc ${ugccargs} -c src/user/knob/format.c -o obj/knob/format.o
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gcc ${ugccargs} -c src/user/knob/heap.c -o obj/knob/heap.o
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gcc ${ugccargs} -c src/user/knob/quit.c -o obj/knob/quit.o
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gcc ${ugccargs} -c src/user/knob/user.c -o obj/knob/user.o
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gcc ${ugccargs} -c src/user/knob/task.c -o obj/knob/task.o
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nasm ${nasmargs} src/user/knob/entry.asm -o obj/knob/entry.o
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obj/kernel/%.kao: src/kernel/%.asm
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mkdir -p $(shell dirname $@)
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nasm ${nasmargs} $< -o $@
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ld ${partlink} obj/knob/*.o -o obj/knob.o
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kernel:
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mkdir -p obj/kernel out
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gcc ${kgccargs} -c src/kernel/drive.c -o obj/kernel/drive.o
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gcc ${kgccargs} -c src/kernel/fat.c -o obj/kernel/fat.o
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gcc ${kgccargs} -c src/kernel/ide.c -o obj/kernel/ide.o
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gcc ${kgccargs} -c src/kernel/idt.c -o obj/kernel/idt.o
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gcc ${kgccargs} -c src/kernel/log.c -o obj/kernel/log.o
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gcc ${kgccargs} -c src/kernel/main.c -o obj/kernel/main.o
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gcc ${kgccargs} -c src/kernel/main2.c -o obj/kernel/main2.o
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gcc ${kgccargs} -c src/kernel/pmap.c -o obj/kernel/pmap.o
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gcc ${kgccargs} -c src/kernel/paging.c -o obj/kernel/paging.o
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gcc ${kgccargs} -c src/kernel/panic.c -o obj/kernel/panic.o
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gcc ${kgccargs} -c src/kernel/pci.c -o obj/kernel/pci.o
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gcc ${kgccargs} -c src/kernel/elf.c -o obj/kernel/elf.o
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gcc ${kgccargs} -c src/kernel/serial.c -o obj/kernel/serial.o
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gcc ${kgccargs} -c src/kernel/task.c -o obj/kernel/task.o
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gcc ${kgccargs} -c src/kernel/util.c -o obj/kernel/util.o
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gcc ${kgccargs} -c src/kernel/vga.c -o obj/kernel/vga.o
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nasm ${nasmargs} src/kernel/isrs.asm -o obj/kernel/isrs.o
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ld -T src/kernel/elf-link.ld obj/kernel/*.o -o obj/kernel.elf
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out/kernel.bin: obj/kernel/drive.ko obj/kernel/fat.ko obj/kernel/ide.ko \
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obj/kernel/idt.ko obj/kernel/log.ko obj/kernel/main.ko \
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obj/kernel/main2.ko obj/kernel/pmap.ko obj/kernel/paging.ko \
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obj/kernel/panic.ko obj/kernel/pci.ko obj/kernel/elf.ko \
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obj/kernel/serial.ko obj/kernel/task.ko obj/kernel/util.ko \
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obj/kernel/vga.ko obj/kernel/isrs.kao
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mkdir -p out
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ld -T src/kernel/elf-link.ld obj/kernel/* -o obj/kernel.elf
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objcopy -O binary obj/kernel.elf out/kernel.bin
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boot:
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out/boot.bin: src/boot.asm
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mkdir -p out
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nasm src/boot.asm -o out/boot.bin
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obj/%.o: src/user/%.c
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mkdir -p $(shell dirname $@)
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gcc ${ugccargs} -c $< -o $@
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obj/%.ao: src/user/%.asm
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mkdir -p $(shell dirname $@)
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nasm ${nasmargs} $< -o $@
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obj/knob.so: obj/knob/env.o obj/knob/file.o obj/knob/format.o \
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obj/knob/heap.o obj/knob/quit.o obj/knob/user.o \
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obj/knob/task.o obj/knob/entry.ao
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ld ${partlink} obj/knob/* -o obj/knob.so
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obj/hello.elf: obj/hello/hello.o obj/knob.so
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ld -T src/user/elf.ld obj/hello/* obj/knob.so -o obj/hello.elf
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obj/init.elf: obj/init/init.o obj/knob.so
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ld -T src/user/elf.ld obj/init/* obj/knob.so -o obj/init.elf
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obj/meminfo.elf: obj/meminfo/meminfo.o obj/knob.so
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ld -T src/user/elf.ld obj/meminfo/* obj/knob.so -o obj/meminfo.elf
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@ -1,8 +1,8 @@
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target remote | qemu-system-i386 -m 512 -S -gdb stdio out/disk.img
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add-symbol-file obj/kernel.elf
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add-symbol-file obj/init.elf
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set disassembly-flavor intel
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layout reg
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break main
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break panic
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break _before_start_task
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cont
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@ -4,7 +4,7 @@ OUTPUT_ARCH(i386)
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SECTIONS {
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. = 0x00030000;
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.text : {
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*/main.o(.text)
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*/main.ko(.text)
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*(.text)
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}
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.rodata : {
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@ -6,6 +6,7 @@
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#include "panic.h"
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#include "task.h"
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#include "paging.h"
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#include "pmap.h"
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enum {
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IDT_PRESENT = 0x80,
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@ -73,6 +74,32 @@ static void *sc_allocate_ram(uint32_t pages) {
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return pd_user_allocate_anywhere_writable(active_task->page_directory, pages);
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}
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enum mi_arg {
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MI_KERNEL_MAX,
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MI_KERNEL_LEFT,
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MI_USER_MAX,
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MI_USER_LEFT,
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MI_TASK_LEFT
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};
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__attribute__ ((pure))
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static uint32_t sc_memory_info(enum mi_arg arg) {
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switch (arg) {
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case MI_KERNEL_MAX:
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return max_kernel_pages;
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case MI_KERNEL_LEFT:
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return kernel_pages_left;
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case MI_USER_MAX:
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return max_user_pages;
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case MI_USER_LEFT:
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return user_pages_left;
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case MI_TASK_LEFT:
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panic("TODO: this process memory left");
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default:
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return -1;
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}
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}
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void const *syscall_table[] = {
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&sc_open_file,
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&sc_close_file,
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@ -81,14 +108,17 @@ void const *syscall_table[] = {
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&sc_start_task,
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&sc_log_string,
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&sc_get_key,
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&sc_allocate_ram
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&sc_allocate_ram,
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&sc_memory_info
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};
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extern void syscall_isr;
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extern void quit_isr;
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extern void yield_isr;
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typedef void isr_t;
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static void register_int(uint8_t n, void *isr, uint8_t dpl) {
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extern isr_t syscall_isr;
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extern isr_t quit_isr;
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extern isr_t yield_isr;
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static void register_int(uint8_t n, isr_t *isr, uint8_t dpl) {
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idt[n].addr_low = (uint32_t)isr & 0xffff;
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idt[n].addr_high = (uint32_t)isr >> 16;
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idt[n].cs = 0x10;
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@ -11,7 +11,7 @@ extern active_task
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extern delete_task
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extern advance_active_task
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n_syscalls equ 8
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n_syscalls equ 0x9
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section .text
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syscall_isr:
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@ -12,6 +12,8 @@ static const uint8_t log_mode_colors[] = {
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void set_log_mode(enum log_mode mode) {
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vga_set_color(log_mode_colors[mode]);
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vga_printch('\n');
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vga_printch('\n');
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}
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void logch(char ch) {
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@ -124,30 +124,25 @@ void main() {
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logch('\n');
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}
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if (BOOT_INFO->support_flags & BIS_PAE)
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logsz("Processor supports PAE (but Portland OS does not yet).\n");
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else
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logsz("Processor does not support PAE.\n");
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logsz("Kernel dynamic area size: ");
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u32_dec(max_kernel_pages * 4, nbuf);
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logsz(nbuf);
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logsz("k\nUserspace area size: ");
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u32_dec(max_user_pages * 4, nbuf);
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logsz(nbuf);
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logsz("k\n\n");
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if (!try_elf_run(drives, "BIN/INIT.ELF"))
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panic("Failed to load init program.");
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if (BOOT_INFO->support_flags & BIS_PAE)
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logsz("Processor supports PAE (but Portland OS does not yet).\n\n");
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else
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logsz("Processor does not support PAE.\n\n");
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u32_dec(kernel_pages_left * 4, nbuf);
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logsz(nbuf);
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logsz("k / ");
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u32_dec(max_kernel_pages * 4, nbuf);
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logsz(nbuf);
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logsz("k kernel heap free.\n");
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u32_dec(user_pages_left * 4, nbuf);
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logsz(nbuf);
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logsz("k / ");
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u32_dec(max_user_pages * 4, nbuf);
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logsz(nbuf);
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logsz("k user memory free.\n");
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init_idt();
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logsz("Switching to init task.\n");
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set_log_mode(LOG_USER);
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logch('\n');
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_start_user_mode();
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}
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@ -79,9 +79,8 @@ void advance_active_task() {
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if (++active_task == tasks + MAX_TASKS)
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active_task = tasks;
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if (active_task == prev_task) {
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logch('\n');
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set_log_mode(LOG_SYSTEM);
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logsz("\nNo active tasks, halting.");
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logsz("No active tasks, halting.");
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while (1)
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asm ("hlt");
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}
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@ -1,5 +1,5 @@
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#include <knob/user.h>
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void main() {
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tell_user_sz("\nHello, world!\nThis is a userspace program that has been started by init.");
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tell_user_sz("Hello, world!\n");
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}
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@ -5,5 +5,6 @@
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#include <stdint.h>
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bool try_sntoi(const char *s, uint32_t n, uint32_t *out);
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void itosz(uint32_t i, char *out);
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#endif
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@ -7,6 +7,8 @@
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typedef uint32_t _file_handle_t;
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typedef uint32_t _task_handle_t;
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typedef uint32_t _drive_number_t;
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typedef uint32_t _pages_t;
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typedef enum {
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_KEY_BACKSPACE = '\b',
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_KEY_RETURN = '\n',
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@ -40,7 +42,8 @@ enum _scn {
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_SCN_START_TASK,
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_SCN_LOG_STRING,
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_SCN_GET_KEY,
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_SCN_ALLOCATE_RAM
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_SCN_ALLOCATE_RAM,
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_SCN_MEMORY_INFO
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};
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static inline uint32_t _sc0(enum _scn eax) {
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@ -133,8 +136,28 @@ static inline _key_code_t _get_key() {
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return _sc0(_SCN_GET_KEY);
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}
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static inline void *_allocate_ram(uint32_t pages) {
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static inline void *_allocate_ram(_pages_t pages) {
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return (void *)_sc1(_SCN_ALLOCATE_RAM, pages);
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}
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static inline _pages_t _kernel_dynamic_area_size() {
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return _sc1(_SCN_MEMORY_INFO, 0x0);
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}
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static inline _pages_t _kernel_dynamic_area_left() {
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return _sc1(_SCN_MEMORY_INFO, 0x1);
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}
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static inline _pages_t _total_userspace_size() {
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return _sc1(_SCN_MEMORY_INFO, 0x2);
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}
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static inline _pages_t _total_userspace_left() {
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return _sc1(_SCN_MEMORY_INFO, 0x3);
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}
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static inline _pages_t _this_process_memory_left() {
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return _sc1(_SCN_MEMORY_INFO, 0x4);
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}
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#endif
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@ -5,7 +5,7 @@
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void main() {
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struct file *f = open_file("SYS/STARTUP.RC");
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if (!f) {
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tell_user_sz("\nCould not open SYS/STARTUP.RC");
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tell_user_sz("Could not open SYS/STARTUP.RC\n");
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return;
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}
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@ -11,3 +11,21 @@ bool try_sntoi(const char *s, uint32_t n, uint32_t *out) {
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*out = calc;
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return true;
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}
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void itosz(uint32_t i, char *out) {
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if (!i) {
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*(uint16_t *)out = (uint16_t)'0';
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return;
|
||||
}
|
||||
bool zero = false;
|
||||
for (uint32_t m = 1000000000; m; m /= 10) {
|
||||
uint8_t d = (i / m) % 10;
|
||||
if (zero)
|
||||
*(out++) = d + '0';
|
||||
else if (d) {
|
||||
zero = true;
|
||||
*(out++) = d + '0';
|
||||
}
|
||||
}
|
||||
*out = '\0';
|
||||
}
|
||||
19
src/user/meminfo/meminfo.c
Normal file
19
src/user/meminfo/meminfo.c
Normal file
|
|
@ -0,0 +1,19 @@
|
|||
#include <pland/syscall.h>
|
||||
#include <knob/user.h>
|
||||
#include <knob/format.h>
|
||||
|
||||
void main() {
|
||||
char nbuf[11];
|
||||
|
||||
tell_user_sz("Kernel dynamic memory remaining: ");
|
||||
|
||||
itosz(_kernel_dynamic_area_left() * 4, nbuf);
|
||||
tell_user_sz(nbuf);
|
||||
tell_user_sz("k\n");
|
||||
|
||||
tell_user_sz("Userspace memory remaining: ");
|
||||
|
||||
itosz(_total_userspace_left() * 4, nbuf);
|
||||
tell_user_sz(nbuf);
|
||||
tell_user_sz("k\n");
|
||||
}
|
||||
Reference in a new issue