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Re: 64bit startup

From: Luca
Subject: Re: 64bit startup
Date: Fri, 26 May 2023 13:18:08 +0200

Il 26/05/23 12:56, Samuel Thibault ha scritto:
Luca, le ven. 26 mai 2023 12:55:32 +0200, a ecrit:
read_exec() it seems that there is something wrong with the elf parsing, as
the size parameters look like kernel addresses:

(gdb) p/x file_size
$1 = 0xffffffff8106f4d3

Perhaps a spurious signedness bit extension?

Could be, the elf header seems ok when calling read_exec:

(gdb) frame 1
#1 0xffffffff8107a712 in exec_load (read=0xffffffff8106f45c <boot_read>, read_exec=0xffffffff8106f4e5 <read_exec>, handle=0xffffffffbd8faea0, out_info=0xffffffffbd8f0f70)
    at ../kern/elf-load.c:87
87                              result = (*read_exec)(handle,
(gdb) p/x *ph
$9 = {
  p_type = 0x1,
  p_flags = 0x5,
  p_offset = 0x0,
  p_vaddr = 0x400000,
  p_paddr = 0x400000,
  p_filesz = 0x1cfd58,
  p_memsz = 0x1cfd58,
  p_align = 0x1000

but I can't explain why I don't see the same issue with my build. I 've now configured gnumach just with

../configure --enable-silent-rules MIG=/path_to_my/mig --disable-user32 --enable-kdb

and I'm building on Debian/Linux stable.


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