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ARM: 8594/1: enable binfmt_flat on systems with an MMU 

Now that the generic changes are in place, this can be enabled on ARM
with the use of proper user space accessors in the flat_get_addr_from_rp()
and flat_put_addr_at_rp() handlers as rp actually holds a user space
address.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Nicolas Pitre 2016-08-05 06:03:41 +01:00 committed by Russell King
parent 55604b7ab1
commit d782e426b8
2 changed files with 4 additions and 3 deletions
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5
arch/arm/include/asm/flat.h
View File

@ -8,8 +8,9 @@
#define flat_argvp_envp_on_stack() 1
#define flat_old_ram_flag(flags) (flags)
#define flat_reloc_valid(reloc, size) ((reloc) <= (size))
#define flat_get_addr_from_rp(rp, relval, flags, persistent) ((void)persistent,get_unaligned(rp))
#define flat_put_addr_at_rp(rp, val, relval) put_unaligned(val,rp)
#define flat_get_addr_from_rp(rp, relval, flags, persistent) \
({ unsigned long __val; __get_user_unaligned(__val, rp); __val; })
#define flat_put_addr_at_rp(rp, val, relval) __put_user_unaligned(val, rp)
#define flat_get_relocate_addr(rel) (rel)
#define flat_set_persistent(relval, p) 0

2
fs/Kconfig.binfmt
View File

@ -89,7 +89,7 @@ config BINFMT_SCRIPT
config BINFMT_FLAT
bool "Kernel support for flat binaries"
depends on !MMU || M68K
depends on !MMU || ARM || M68K
depends on !FRV || BROKEN
help
Support uClinux FLAT format binaries.