diff options
author | Damien Le Moal <damien.lemoal@wdc.com> | 2021-04-17 10:10:09 +0900 |
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committer | Greg Ungerer <gerg@linux-m68k.org> | 2021-04-23 15:33:40 +1000 |
commit | 09accc3a05f7f1a6486f4a278d209ac122289c0b (patch) | |
tree | bcc1eccf0909b07df3d27d00da0f7b31fa76edfe /arch/riscv/Kconfig | |
parent | 04d82a6d0881ef1ab1e9f66f10805177ee2fb1e8 (diff) | |
download | linux-09accc3a05f7f1a6486f4a278d209ac122289c0b.tar.bz2 |
riscv: Disable data start offset in flat binaries
uclibc/gcc combined with elf2flt riscv linker file fully resolve the
PC relative __global_pointer$ value at compile time and do not generate
a relocation entry to set a correct value of the gp register at runtime.
As a result, if the flatbin loader offsets the start of the data
section, the relative position change between the text and data sections
compared to the compile time positions results in an incorrect gp value
being used. This causes flatbin executables to crash.
Avoid this problem by enabling CONFIG_BINFMT_FLAT_NO_DATA_START_OFFSET
automatically when CONFIG_RISCV is enabled and CONFIG_MMU is disabled.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Acked-by: Palmer Dabbelt <palmerdabbelt@google.com>
Signed-off-by: Greg Ungerer <gerg@linux-m68k.org>
Diffstat (limited to 'arch/riscv/Kconfig')
-rw-r--r-- | arch/riscv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 4515a10c5d22..add528eb9235 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -33,6 +33,7 @@ config RISCV select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_HUGE_PMD_SHARE if 64BIT + select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU select CLONE_BACKWARDS select CLINT_TIMER if !MMU select COMMON_CLK |