1. 24 Sep, 2020 1 commit
    • Masahiro Yamada's avatar
      scripts/kallsyms: skip ppc compiler stub *.long_branch.* / *.plt_branch.* · 516d980f
      Masahiro Yamada authored
      PowerPC allmodconfig often fails to build as follows:
      
          LD      .tmp_vmlinux.kallsyms1
          KSYM    .tmp_vmlinux.kallsyms1.o
          LD      .tmp_vmlinux.kallsyms2
          KSYM    .tmp_vmlinux.kallsyms2.o
          LD      .tmp_vmlinux.kallsyms3
          KSYM    .tmp_vmlinux.kallsyms3.o
          LD      vmlinux
          SORTTAB vmlinux
          SYSMAP  System.map
        Inconsistent kallsyms data
        Try make KALLSYMS_EXTRA_PASS=1 as a workaround
        make[2]: *** [../Makefile:1162: vmlinux] Error 1
      
      Setting KALLSYMS_EXTRA_PASS=1 does not help.
      
      This is caused by the compiler inserting stubs such as *.long_branch.*
      and *.plt_branch.*
      
        $ powerpc-linux-nm -n .tmp_vmlinux.kallsyms2
         [ snip ]
        c00000000210c010 t 00000075.plt_branch.da9:19
        c00000000210c020 t 00000075.plt_branch.1677:5
        c00000000210c030 t 00000075.long_branch.memmove
        c00000000210c034 t 00000075.plt_branch.9e0:5
        c00000000210c044 t 00000075.plt_branch.free_initrd_mem
          ...
      
      Actually, the problem mentioned in scripts/link-vmlinux.sh comments;
      "In theory it's possible this results in even more stubs, but unlikely"
      is happening here, and ends up with another kallsyms step required.
      
      scripts/kallsyms.c already ignores various compiler stubs. Let's do
      similar to make kallsysms for PowerPC always succeed in 2 steps.
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      516d980f
  2. 20 Sep, 2020 20 commits
  3. 19 Sep, 2020 19 commits