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hktechn0 / newlib-xv6

Newlib C library port for xv6 operating system
GNU General Public License v2.0
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panic: loaduvm: addr must be page aligned #1

Closed lqf96 closed 8 years ago

lqf96 commented 8 years ago

I encountered some problems when running newlib-linked programs in xv6. I used this toolchain to compile the newlib, and followed README-xv6 to generate Makefile. There aren't any problems in compiling and I do get libc.a, libm.a and other library files. Then I wrote a hello world program and linked it statically against newlib. But the executable generated is too big for the xv6 filesystem (also pointed out in README), so I stripped it. After stripping the file size is 53k so it's now ok to put it in fs. When I run "make qemu" I was able to go into the system, and other programs works fine. But when I run my test program, it stuck for a few second and then it says "panic: loaduvm: addr must be page aligned". Is it because I stripped my program, or there are patches or modifications I have to apply to xv6 source code, or some other reasons? P.S. I'm using up-to-date version of xv6 from their Github repo, and below is the flags I used to compile my test programs: cc -fno-pic -static -fno-strict-aliasing -fvar-tracking -fvar-tracking-assignments -static-libgcc -nostartfiles -nostdlib -ffreestanding -nodefaultlibs -fno-builtin -m32 -Wall -MD -gdwarf-2 -fno-omit-frame-pointer -fno-stack-protector -I../include/newlib -o build/_test test.c -L../lib/newlib/ -L../lib/libnosys -e main -Ttext 0 -lc -lm -lnosys

lqf96 commented 8 years ago

No problems now, I just forget to add "-N" flag when linking.