From: Philby John <pjohn@xxxxxxxxxx> Date: Wed, 13 Apr 2011 20:46:32 +0530 Subject: [PATCH] MIPS: Octeon: add option to ignore PT_NOTE section Some early Octeon bootloaders cannot process PT_NOTE program headers as reported in numerous sections of the web, here is an example http://www.spinics.net/lists/mips/msg37799.html Loading usually fails with such an error ... Error allocating memory for elf image! The work around usually is to strip the .notes section by using such a command $mips-gnu-strip -R .notes vmlinux -o fixed-vmlinux It is expected that the vmlinux image got after compilation be bootable. Add a Kconfig option to ignore the PT_NOTE section. Signed-off-by: Philby John <pjohn@xxxxxxxxxx> --- arch/mips/cavium-octeon/Kconfig | 8 ++++++++ arch/mips/kernel/vmlinux.lds.S | 6 ++++++ 2 files changed, 14 insertions(+), 0 deletions(-) diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig index caae228..ddecee3 100644 --- a/arch/mips/cavium-octeon/Kconfig +++ b/arch/mips/cavium-octeon/Kconfig @@ -90,6 +90,14 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY help Lock the kernel's implementation of memcpy() into L2. +config DISABLE_ELF_NOTE_HEADER + bool "Disable the creation of the ELF PT_NOTE program header in vmlinux" + depends on CPU_CAVIUM_OCTEON + help + Some early Octeon bootloaders cannot process PT_NOTE program + headers. Select y to omit these headers so that the kernel + can be loaded with older bootloaders. + config ARCH_SPARSEMEM_ENABLE def_bool y select SPARSEMEM_STATIC diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S index 832afbb..0536910 100644 --- a/arch/mips/kernel/vmlinux.lds.S +++ b/arch/mips/kernel/vmlinux.lds.S @@ -8,7 +8,9 @@ OUTPUT_ARCH(mips) ENTRY(kernel_entry) PHDRS { text PT_LOAD FLAGS(7); /* RWX */ +#ifndef CONFIG_DISABLE_ELF_NOTE_HEADER note PT_NOTE FLAGS(4); /* R__ */ +#endif } #ifdef CONFIG_32BIT @@ -62,7 +64,11 @@ SECTIONS __stop___dbe_table = .; } +#ifndef CONFIG_DISABLE_ELF_NOTE_HEADER NOTES :text :note +#else + NOTES :text +#endif .dummy : { *(.dummy) } :text RODATA -- 1.7.4
