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Paul Burton 620b155034 MIPS: fix FP mode selection in lieu of .MIPS.abiflags data 
Commit 46490b5725 ("MIPS: kernel: elf: Improve the overall ABI and FPU
mode checks") reworked the ELF FP ABI mode selection logic, but when
CONFIG_MIPS_O32_FP64_SUPPORT is enabled it breaks the use of binaries
which have no PT_MIPS_ABIFLAGS program header & associated
.MIPS.abiflags section.

A default mode is selected based upon whether the ELF contains MIPS32 or
MIPS64 code, but that selection is made in arch_elf_pt_proc.
arch_elf_pt_proc only executes when a PT_MIPS_ABIFLAGS program header is
found. If one is not found then arch_elf_pt_proc is never called, and no
default overall_fp_mode value is selected. When arch_check_elf is
called, both abi0 & abi1 are MIPS_ABI_FP_UNKNOWN which leads to both
prog_req & interp_req being set to none_req. none_req matches none of
the conditions for mode selection at the end of arch_check_elf, so
overall_fp_mode is left untouched. Finally once mips_set_personality_fp
is called the BUG() in the default case is then hit & the kernel likely
panics.

Fix this by moving the selection of a default overall mode to the start
of arch_check_elf, which runs once per ELF executed regardless of
whether it has a PT_MIPS_ABIFLAGS program header.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Matthew Fortune <matthew.fortune@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.0+
Patchwork: http://patchwork.linux-mips.org/patch/9978/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
 		2015-05-12 18:54:05 +02:00
..
.gitignore
…
8250-platform.c mips: remove needless include of module.h from core kernel files. 2011-10-31 19:30:57 -04:00
Makefile MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6 2015-02-17 15:37:37 +00:00
asm-offsets.c Merge branch 'exec_domain_rip_v2' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/misc 2015-04-15 13:53:55 -07:00
binfmt_elfn32.c MIPS: Compat: Fix cputime_to_timeval() arguments in compat binfmt_elf. 2013-06-06 16:11:26 +02:00
binfmt_elfo32.c MIPS: Remove old core dump functions 2014-08-02 00:06:37 +02:00
bmips_vec.S MIPS: BMIPS: Fix ".previous without corresponding .section" warnings 2014-11-24 07:44:05 +01:00
branch.c MIPS: LLVMLinux: Fix a 'cast to type not present in union' error. 2015-04-01 17:21:46 +02:00
cevt-bcm1480.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cevt-ds1287.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cevt-gt641xx.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
cevt-r4k.c MIPS: cevt-r4k: Cleanup c0_compare_interrupt. 2015-03-31 12:04:12 +02:00
cevt-sb1250.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00
cevt-txx9.c MIPS: cevt-txx9: Implement read_sched_clock 2015-04-01 17:21:30 +02:00
cps-vec.S MIPS: kernel: cps-vec: Replace "addi" with "addiu" 2015-02-17 15:37:28 +00:00
cpu-bugs64.c MIPS: kernel: cpu-bugs64: Do not check R6 cores for existing 64-bit bugs 2015-02-17 15:37:24 +00:00
cpu-probe.c Merge branch '4.0-fixes' into mips-for-linux-next 2015-04-13 16:03:32 +02:00
crash.c mips: fix up obsolete cpu function usage. 2015-03-05 15:25:06 +10:30
crash_dump.c mips: Convert pr_warning to pr_warn 2014-11-24 07:44:51 +01:00
csrc-bcm1480.c MIPS: csrc-bcm1480: Implement read_sched_clock 2015-04-01 17:21:27 +02:00
csrc-ioasic.c MIPS: csrc-ioasic: Implement read_sched_clock 2015-04-01 17:21:28 +02:00
csrc-r4k.c MIPS: csrc-r4k: Implement read_sched_clock 2015-04-01 17:21:27 +02:00
csrc-sb1250.c MIPS: csrc-sb1250: Implement read_sched_clock 2015-04-01 17:21:33 +02:00
early_printk.c early_printk: consolidate random copies of identical code 2013-04-29 18:28:13 -07:00
early_printk_8250.c MIPS: Add 8250/16550 serial early printk driver 2013-10-29 21:24:36 +01:00
elf.c MIPS: fix FP mode selection in lieu of .MIPS.abiflags data 2015-05-12 18:54:05 +02:00
entry.S MIPS: kernel: entry.S: Set correct ISA level for mips_ihb 2015-04-10 15:41:46 +02:00
ftrace.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-08-07 08:47:00 -07:00
genex.S Merge branch '4.1-fp' into mips-for-linux-next 2015-04-13 16:01:37 +02:00
gpio_txx9.c
…
head.S MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
i8253.c MIPS: irq: Remove IRQF_DISABLED 2011-12-07 22:03:45 +00:00
i8259.c MIPS: i8259: Use IRQ domains 2014-11-24 07:44:52 +01:00
idle.c MIPS: idle: Workaround wait + FDC problems 2015-03-31 12:04:12 +02:00
irq-gt641xx.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq-msc01.c MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region 2014-06-26 10:48:23 +01:00
irq-rm7000.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
irq.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-06-09 18:10:34 -07:00
irq_cpu.c MIPS: IRQ: Fix disable_irq on CPU IRQs 2015-01-16 14:03:17 +01:00
irq_txx9.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
jump_label.c MIPS: jump_label.c: Handle the microMIPS J instruction encoding 2014-11-19 18:22:09 +01:00
kgdb.c MIPS: kernel: {ftrace,kgdb}: Set correct address limit for cache flushes 2014-03-26 23:09:18 +01:00
kprobes.c mips: Replace __get_cpu_var uses 2014-08-26 13:45:51 -04:00
linux32.c unify compat fanotify_mark(2), switch to COMPAT_SYSCALL_DEFINE 2013-05-09 13:46:38 -04:00
machine_kexec.c MIPS: kdump: Set correct value to kexec_indirection_page variable 2014-08-25 16:33:44 +02:00
mcount.S MIPS: mcount: Adjust stack pointer for static trace in MIPS32 2014-09-26 11:41:17 +02:00
mips-cm.c MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
mips-cpc.c MIPS: Replace use of phys_t with phys_addr_t. 2014-11-24 22:47:31 +01:00
mips-mt-fpaff.c mips: fix up obsolete cpu function usage. 2015-03-05 15:25:06 +10:30
mips-mt.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
mips-r2-to-r6-emul.c MIPS: Set `si_code' for SIGFPE signals sent from emulation too 2015-04-08 01:10:19 +02:00
mips_ksyms.c Merge branch 'mipsr6-for-3.20' of git://git.linux-mips.org/pub/scm/mchandras/linux into mips-for-linux-next 2015-02-19 16:00:34 +01:00
mips_machine.c MIPS: move mips_{set,get}_machine_name() to a more generic place 2013-05-08 01:19:07 +02:00
module-rela.c MIPS: Whitespace cleanup. 2013-02-01 10:00:22 +01:00
module.c mm: vmalloc: pass additional vm_flags to __vmalloc_node_range() 2015-02-13 21:21:42 -08:00
octeon_switch.S MIPS: OCTEON: Delete unused COP2 saving code 2015-02-20 15:30:23 +01:00
perf_event.c MIPS: perf: Reorganize contents of perf support files. 2011-10-24 23:34:26 +01:00
perf_event_mipsxx.c MIPS: perf: Add hardware perf events support for Loongson-3 2015-04-01 17:22:17 +02:00
pm-cps.c MIPS: {pm,smp}-cps: use cpu_vpe_id macro 2014-07-30 20:48:42 +02:00
pm.c MIPS: PM: Implement PM helper macros 2014-05-02 16:39:10 +01:00
proc.c MIPS: Add support for XPA. 2015-03-19 17:39:49 +01:00
process.c This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
prom.c MIPS: Let __dt_register_buses accept a single bus type 2015-04-01 17:21:38 +02:00
ptrace.c Merge branch '4.1-fp' into mips-for-linux-next 2015-04-13 16:01:37 +02:00
ptrace32.c MIPS: Remove asm/user.h 2014-08-02 00:06:37 +02:00
r4k_fpu.S MIPS: Push .set mips64r* into the functions needing it 2015-03-27 19:42:42 +01:00
r4k_switch.S MIPS: Respect the ISA level in FCSR handling 2015-04-08 01:10:37 +02:00
r2300_fpu.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
r2300_switch.S MIPS: Respect the ISA level in FCSR handling 2015-04-08 01:10:37 +02:00
r6000_fpu.S MIPS: Fix build with binutils 2.24.51+ 2014-11-07 15:07:36 +01:00
relocate_kernel.S MIPS: kdump: Skip walking indirection page for crashkernels 2013-09-05 20:53:37 +02:00
reset.c MIPS: Provide fallback reboot/poweroff/halt implementations 2015-04-01 17:21:58 +02:00
rtlx-cmp.c MIPS: APRP: Fix an issue when device_create() fails. 2014-08-01 17:30:35 +02:00
rtlx-mt.c MIPS: APRP: Fix an issue when device_create() fails. 2014-08-01 17:30:35 +02:00
rtlx.c MIPS: rtlx: Remove KERN_DEBUG from pr_debug() arguments in rtlx.c 2014-11-24 07:44:04 +01:00
scall32-o32.S MIPS: Fix restart of indirect syscalls 2015-01-16 00:35:45 +01:00
scall64-64.S MIPS: Wire up execveat(2). 2015-01-13 15:53:09 +01:00
scall64-n32.S MIPS: Wire up execveat(2). 2015-01-13 15:53:09 +01:00
scall64-o32.S MIPS: Fix restart of indirect syscalls 2015-01-16 00:35:45 +01:00
segment.c MIPS: Add debugfs file to print the segmentation control registers 2014-01-22 20:19:00 +01:00
setup.c MIPS, ttyFDC: Add early FDC console support 2015-03-31 12:04:12 +02:00
signal-common.h mips: Use get_signal() signal_setup_done() 2014-08-06 13:03:08 +02:00
signal.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
signal32.c all arches, signal: move restart_block to struct task_struct 2015-02-12 18:54:12 -08:00
signal_n32.c mips: Use sigsp() 2014-08-06 13:04:30 +02:00
smp-bmips.c mips: fix up obsolete cpu function usage. 2015-03-05 15:25:06 +10:30
smp-cmp.c mips: fix up obsolete cpu function usage. 2015-03-05 15:25:06 +10:30
smp-cps.c This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
smp-gic.c MIPS: Move gic.h to include/linux/irqchip/mips-gic.h 2014-11-24 07:44:59 +01:00
smp-mt.c mips: fix up obsolete cpu function usage. 2015-03-05 15:25:06 +10:30
smp-up.c MIPS: SMP: Remove plat_smp_ops cpus_done method. 2014-05-27 11:06:42 +02:00
smp.c MIPS: SMP: Fix build error. 2015-05-12 09:13:30 +02:00
spinlock_test.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
spram.c MIPS: Add cases for CPU_QEMU_GENERIC 2015-02-16 10:01:24 +00:00
stacktrace.c mips: migrate core kernel file from module.h --> export.h 2011-10-31 19:30:56 -04:00
sync-r4k.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
syscall.c MIPS: kernel: syscall: Set the appropriate ISA level for MIPS R6 2015-02-17 15:37:29 +00:00
time.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
topology.c
…
traps.c This is the final removal (after several years!) of the obsolete cpus_* 2015-04-20 10:19:03 -07:00
unaligned.c Merge branch '4.0-fixes' into mips-for-linux-next 2015-04-13 16:03:32 +02:00
vdso.c MIPS: Enable VDSO randomization 2014-11-24 07:45:38 +01:00
vmlinux.lds.S MIPS: Discard .eh_frame sections in linker script. 2013-08-26 15:33:41 +02:00
vpe-cmp.c MIPS: APRP: Add VPE loader support for CMP platforms. 2014-01-22 20:19:02 +01:00
vpe-mt.c MIPS: MT: Remove SMTC support 2014-05-24 00:07:01 +02:00
vpe.c Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2014-01-30 17:20:32 -08:00
watch.c MIPS: Delete __cpuinit/__CPUINIT usage from MIPS code 2013-07-14 19:36:51 -04:00