Hi! Samuel Thibault <samuel.thiba...@gnu.org> skribis:
> At last I got it working: in the latest git master, the bootstrap code > can cope with VM_MIN_KERNEL_ADDRESS != 0 by using segmentation before > switching to C code. This means we can make the kernel live at high > virtual addresses, which means that the debugger trace & such can > properly know how to separate user and kernel addresses. Excellent, thank you! > It works for me on kvm, but I'd prefer to see more tests before enbling > it by default. The attached patch is all that is needed to enable it. It works for me with QEMU/KVM with the cross-built image. I get nice stack traces from KDB: db> trace/tu 0xc011eae9(c027c819,f4d5fc60,17,f4d7a548,f4d83ef8) 0xc014ee59(f4d5cdc0,17,f4d83ef8,128bc70,a) 0xc01529dc(1,17,f4d83ef8,f4d60d20,fe5729c8) 0xc0106d40(128fdbc,2000,a,800,0) >>>>> user space <<<<< 0x103ac23(9cb9ffda,e90128fd,ffdaadf0,804cd48,28ae0) no memory is assigned to address 28fd9cbd There might still be something wrong with the user-space stack trace though, but it could be due to something else: $ addr2line -pfa -e /nix/store/dsw2yh0sxidmijg2y3vjps1mqjvx6q5w-hurd-0-i586-pc-gnu/hurd/auth 0x103ac23 0x0103ac23: ?? ??:0 (The Hurd above is compiled with -O1.) Thanks again, you’re my hero! ;-) Ludo’.
