diff options
| author | Maciej W. Rozycki <macro@imgtec.com> | 2015-11-13 00:48:29 +0000 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2016-01-20 00:39:20 +0100 |
| commit | 503943e0e52bd3fbf014aa1d838ced37adb43121 (patch) | |
| tree | c38c3f702cc313d40c27caa9531370b24943aaeb /arch/mips/include/asm/elf.h | |
| parent | 93adeaf6dadcaed943a51ad9ea2d77e24e6d70a7 (diff) | |
MIPS: Add IEEE Std 754 conformance mode selection
Add an `ieee754=' kernel parameter to control IEEE Std 754 conformance
mode.
Use separate flags copied from the respective CPU feature flags, and
adjusted according to the conformance mode selected, to make binaries
requesting individual NaN encoding modes accepted or rejected as needed.
Update the initial setting for FCSR and, in the full FPU emulation mode,
its read-only mask accordingly. Accept the mode selection requested for
legacy processors as well.
As with the EF_MIPS_NAN2008 ELF file header flag adjust both ABS2008 and
NAN2008 bits at the same time, to match the choice made for hardware
currently implemented.
Signed-off-by: Maciej W. Rozycki <macro@imgtec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Matthew Fortune <Matthew.Fortune@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/11481/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/elf.h')
| -rw-r--r-- | arch/mips/include/asm/elf.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h index 3dba5d05830c..cefb7a596878 100644 --- a/arch/mips/include/asm/elf.h +++ b/arch/mips/include/asm/elf.h @@ -447,6 +447,10 @@ struct arch_elf_state { .overall_fp_mode = -1, \ } +/* Whether to accept legacy-NaN and 2008-NaN user binaries. */ +extern bool mips_use_nan_legacy; +extern bool mips_use_nan_2008; + extern int arch_elf_pt_proc(void *ehdr, void *phdr, struct file *elf, bool is_interp, struct arch_elf_state *state); |