On Thu, Apr 25, 2024 at 06:30:52PM +0100, Alex Bennée wrote: > > Continuing to debug on QEMU it seems there is an incompatibility with > the images and the peloader (which overrides the normal efi loader): > > Thread 1 hit Breakpoint 3.2, grub_load_normal_mode () at > ../../../grub-core/kern/main.c:241 > 241 in ../../../grub-core/kern/main.c > > > (grub gdb) hbreak do_load_image > > > Hardware assisted breakpoint 4 at 0x23bdf0e00: do_load_image. (2 locations) > > > (grub gdb) c > > > Continuing. > > > add symbol table from file "bli.module" at > > > .text_addr = 0x23ba772e0 > > > .bss_addr = 0x0 > > > .module_license_addr = 0x23ba7764a > .data_addr = 0x0 > > > .rodata.str1.1_addr = 0x23ba77560 > > > .rodata_addr = 0x23ba77550 > > > add symbol table from file "xen_boot.module" at > > > .text_addr = 0x23bcef3c0 > > > .bss_addr = 0x23bcf0370 > > > .module_license_addr = 0x23bcf035e > > .data_addr = 0x0 > > .rodata.str1.1_addr = 0x23bcefff8 > > Thread 1 hit Breakpoint 4.1, do_load_image (boot_policy=0 '\000', > parent_image_handle=0x23e889f18, file_path=0x237d1bce0, > source_buffer=0x239f00000, source_size=1081352, > image_handle=0x4766c498) at ../../../grub-core/loader/efi/peimage.c:745 > warning: 745 ../../../grub-core/loader/efi/peimage.c: No such file or > directory > (grub gdb) hbreak grub_error > Hardware assisted breakpoint 5 at 0x6db0: grub_error. (2 locations) > (grub gdb) c > Continuing. > > Thread 1 hit Breakpoint 4.2, 0x000000023bdf0e4c in do_load_image > (boot_policy=<optimized out>, parent_image_handle=<optimized out>, > image_handle=<optimized out>, > source_size=<optimized out>, source_buffer=<optimized out>, > file_path=<optimized out>) at ../../../grub-core/loader/efi/peimage.c:751 > 751 in ../../../grub-core/loader/efi/peimage.c > (grub gdb) c > Continuing. > > Thread 1 hit Breakpoint 5.2, grub_error (n=GRUB_ERR_BAD_OS, fmt=0x23bdf1703 > "section inside header") at ../../../grub-core/kern/err.c:41 > warning: 41 ../../../grub-core/kern/err.c: No such file or directory > (grub gdb) bt > #0 grub_error (n=GRUB_ERR_BAD_OS, fmt=0x23bdf1703 "section inside header") > at ../../../grub-core/kern/err.c:41 > #1 0x000000023bdf0e34 in do_load_image (boot_policy=<optimized out>, > parent_image_handle=<optimized out>, file_path=<optimized out>, > source_buffer=<optimized out>, > source_size=<optimized out>, image_handle=<optimized out>) at > ../../../grub-core/loader/efi/peimage.c:747 > #2 0x000000023bedabdc in grub_arch_efi_linux_boot_image (addr=9561964544, > size=1081352, > args=0x23bbb8b00 "placeholder dom0_mem=4G,max:4G loglvl=all > guest_loglvl=all no-real-mode edd=off") at > ../../../grub-core/loader/efi/linux.c:210 > #3 0x000000023bff41bc in grub_loader_boot () at > ../../../grub-core/commands/boot.c:211 > #4 grub_loader_boot () at ../../../grub-core/commands/boot.c:190 > #5 0x000000023bf42158 in grub_command_execute (name=0x23bf4e72c "boot", > argc=0, argv=0x0 <_start>) at ../../../include/grub/command.h:126 > #6 grub_menu_execute_entry (entry=entry@entry=0x23bd17660, > auto_boot=auto_boot@entry=0) at ../../../grub-core/normal/menu.c:306 > #7 0x000000023bf41e2c in show_menu (autobooted=<optimized out>, > nested=<optimized out>, menu=<optimized out>) at > ../../../grub-core/normal/menu.c:925 > #8 grub_show_menu (menu=menu@entry=0x23bd1a940, nested=nested@entry=1, > autoboot=autoboot@entry=0) at ../../../grub-core/normal/menu.c:940 > #9 0x000000023bf408a8 in grub_normal_execute (config=<optimized out>, > nested=nested@entry=1, batch=batch@entry=0) at > ../../../grub-core/normal/main.c:291 > #10 0x000000023bf32260 in grub_cmd_source (cmd=<optimized out>, argc=1, > args=0x23bd1fcc8) at ../../../grub-core/commands/configfile.c:48 > #11 grub_cmd_source (cmd=<optimized out>, argc=<optimized out>, > args=0x23bd1fcc8) at ../../../grub-core/commands/configfile.c:30 > #12 0x000000023bf48d0c in grub_script_execute_cmdline (cmd=<optimized out>) > at ../../../grub-core/script/execute.c:1034 > #13 0x000000023bf478c0 in grub_script_execute_cmd > (cmd=cmd@entry=0x23bd190c8) at ../../../grub-core/script/execute.c:819 > #14 0x000000023bf4874c in grub_script_execute_cmdlist (list=<optimized > out>) at ../../../grub-core/script/execute.c:1079 > #15 0x000000023bf478c0 in grub_script_execute_cmd (cmd=<optimized out>) at > ../../../grub-core/script/execute.c:819 > #16 0x000000023bf489b4 in grub_script_execute (script=<optimized out>) at > ../../../grub-core/script/execute.c:1191 > #17 0x000000023bf497fc in grub_normal_parse_line > (line=line@entry=0x23bd20060 "configfile $prefix/grub.cfg", > getline=getline@entry=0x23bf40430 <read_config_file_getline>, > getline_data=getline_data@entry=0x23bd20380) at > ../../../grub-core/script/main.c:36 > #18 0x000000023bf409a0 in read_config_file (config=0x23bd20780 > "(hd0,gpt1)/EFI/debian/grub.cfg") at ../../../grub-core/normal/main.c:179 > #19 grub_normal_execute (config=config@entry=0x23bd20780 > "(hd0,gpt1)/EFI/debian/grub.cfg", nested=nested@entry=0, batch=batch@entry=0) > at ../../../grub-core/normal/main.c:277 > #20 0x000000023bf40ca4 in grub_enter_normal_mode > (config=config@entry=0x23bd20780 "(hd0,gpt1)/EFI/debian/grub.cfg") at > ../../../grub-core/normal/main.c:304 > #21 0x000000023bf40da0 in grub_try_normal_prefix (prefix=0x23bd209a0 > "(hd0,gpt1)/EFI/debian") at ../../../grub-core/normal/main.c:356 > #22 0x000000023bf40ea0 in grub_try_normal (variable=0x23bf4e492 "fw_path") > at ../../../grub-core/normal/main.c:407 > #23 grub_cmd_normal (cmd=<optimized out>, argc=0, argv=<optimized out>) at > ../../../grub-core/normal/main.c:421 > #24 grub_cmd_normal (cmd=<optimized out>, argc=<optimized out>, > argv=<optimized out>) at ../../../grub-core/normal/main.c:412 > #25 0x000000023c018fb8 in grub_command_execute (name=0x23c01ec6e ")", > argc=0, argv=0x0 <_start>) at ../../../include/grub/command.h:126 > #26 grub_load_normal_mode () at ../../../grub-core/kern/main.c:247 > #27 grub_main () at ../../../grub-core/kern/main.c:339 > #28 0x000000023c5c02c8 in ?? () > #29 0x000000023c62a000 in ?? () > #30 0xafafafaf6c617470 in ?? () > Backtrace stopped: previous frame identical to this frame (corrupt stack?) > > Is it possible to override the peloader or does the Xen image need to be > prepared a certain way?
Well it needs to be a proper UEFI binary. The loader works for Linux and for chainloading the Windows boot loader, we haven't tested other binaries (except some small test binaries I suppose). Personally, I'm surprised Xen still exists in 2024, so don't expect me to be very helpful here. In the error case you can see though, that one of the section addresses in the Xen binary to be relocated points into the (PE) header of the binary, which obviously seems wrong. So go check your PE sections and check which one is wrong? -- debian developer - deb.li/jak | jak-linux.org - free software dev ubuntu core developer i speak de, en
