Use static page table for boot, mapping first 4Mbyte; no more segment trick
Allocate proper kernel page table immediately in main using boot allocator Remove pginit Simplify address space layout a tiny bit More to come (e.g., superpages to simplify static table)
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3a03810643
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66ba8079c7
9 changed files with 1101 additions and 103 deletions
5
Makefile
5
Makefile
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@ -72,7 +72,8 @@ AS = $(TOOLPREFIX)gas
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LD = $(TOOLPREFIX)ld
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OBJCOPY = $(TOOLPREFIX)objcopy
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OBJDUMP = $(TOOLPREFIX)objdump
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CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer
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#CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -O2 -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer
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CFLAGS = -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer
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CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
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ASFLAGS = -m32 -gdwarf-2 -Wa,-divide
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# FreeBSD ld wants ``elf_i386_fbsd''
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@ -198,7 +199,7 @@ QEMUGDB = $(shell if $(QEMU) -help | grep -q '^-gdb'; \
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then echo "-gdb tcp::$(GDBPORT)"; \
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else echo "-s -p $(GDBPORT)"; fi)
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ifndef CPUS
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CPUS := 2
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CPUS := 1
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endif
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QEMUOPTS = -hdb fs.img xv6.img -smp $(CPUS) -m 512
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