From: Bin Meng Date: Thu, 25 Oct 2018 10:05:37 +0000 (-0700) Subject: x86: Fix car_uninit weak symbol definition X-Git-Tag: v2018.11-rc3~2^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3d2be8003c77cad350f1ec7c79f914797718c5bf;p=platform%2Fkernel%2Fu-boot.git x86: Fix car_uninit weak symbol definition Since commit 80df194f0165 ("x86: detect unsupported relocation types"), an error message is seen on QEMU x86 target during boot: do_elf_reloc_fixups32: unsupported relocation type 0x1 at fff841f0, offset = 0xfff00087 do_elf_reloc_fixups32: unsupported relocation type 0x2 at fff841f8, offset = 0xfff00091 Check offset 0xfff00087 and 0xfff00091 in the u-boot ELF image, fff00087 000df401 R_386_32 00000000 car_uninit fff00091 000df402 R_386_PC32 00000000 car_uninit we see R_386_32 and R_386_PC32 relocation type is generated for symbol car_uninit, which is declared as a weak symbol in start.S. However the actual weak symbol implementation ends up nowhere. As we can see below, it's *UND*. $ objdump -t u-boot | grep car_uninit 00000000 w *UND* 00000000 car_uninit With this fix, it is normal now. $ objdump -t u-boot | grep car_uninit fff00094 w F .text.start 00000001 car_uninit Reported-by: Hannes Schmelzer Signed-off-by: Bin Meng Tested-by: Heinrich Schuchardt Reviewed-by: Heinrich Schuchardt Tested-by: Hannes Schmelzer --- diff --git a/arch/x86/cpu/start.S b/arch/x86/cpu/start.S index e1f634f..30fa7de 100644 --- a/arch/x86/cpu/start.S +++ b/arch/x86/cpu/start.S @@ -16,6 +16,7 @@ #include #include #include +#include .section .text.start .code32 @@ -184,13 +185,8 @@ board_init_f_r_trampoline: movl %eax, %esp /* See if we need to disable CAR */ -.weak car_uninit - movl $car_uninit, %eax - cmpl $0, %eax - jz 1f - call car_uninit -1: + /* Re-enter U-Boot by calling board_init_f_r() */ call board_init_f_r @@ -199,6 +195,10 @@ die: jmp die hlt +WEAK(car_uninit) + ret +ENDPROC(car_uninit) + blank_idt_ptr: .word 0 /* limit */ .long 0 /* base */