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| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-11-02 10:16:50 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-11-04 16:02:09 +0100 |
| commit | d2ed5cb80a241518dd71f467c884bfabbe15f68c (patch) | |
| tree | 7c4198411f5fb88151ae3a467ecfdce1d09aaebd /arch/arm/kernel/elf.c | |
| parent | Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 (diff) | |
| download | linux-d2ed5cb80a241518dd71f467c884bfabbe15f68c.tar.xz linux-d2ed5cb80a241518dd71f467c884bfabbe15f68c.zip | |
[ARM] fix VFP+softfloat binaries
2.6.28-rc tightened up the ELF architecture checks on ARM. For
non-EABI it only allows VFP if the hardware supports it. However,
the kernel fails to also inspect the soft-float flag, so it
incorrectly rejects binaries using soft-VFP.
The fix is simple: also check that EF_ARM_SOFT_FLOAT isn't set
before rejecting VFP binaries on non-VFP hardware.
Acked-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/kernel/elf.c')
| -rw-r--r-- | arch/arm/kernel/elf.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/kernel/elf.c b/arch/arm/kernel/elf.c index 513f332f040d..84849098c8e8 100644 --- a/arch/arm/kernel/elf.c +++ b/arch/arm/kernel/elf.c @@ -21,12 +21,16 @@ int elf_check_arch(const struct elf32_hdr *x) eflags = x->e_flags; if ((eflags & EF_ARM_EABI_MASK) == EF_ARM_EABI_UNKNOWN) { + unsigned int flt_fmt; + /* APCS26 is only allowed if the CPU supports it */ if ((eflags & EF_ARM_APCS_26) && !(elf_hwcap & HWCAP_26BIT)) return 0; + flt_fmt = eflags & (EF_ARM_VFP_FLOAT | EF_ARM_SOFT_FLOAT); + /* VFP requires the supporting code */ - if ((eflags & EF_ARM_VFP_FLOAT) && !(elf_hwcap & HWCAP_VFP)) + if (flt_fmt == EF_ARM_VFP_FLOAT && !(elf_hwcap & HWCAP_VFP)) return 0; } return 1; |