Chris Metcalf 81711cee93 arch/tile: handle rt_sigreturn() more cleanly ... The current tile rt_sigreturn() syscall pattern uses the common idiom of loading up pt_regs with all the saved registers from the time of the signal, then anticipating the fact that we will clobber the ABI "return value" register (r0) as we return from the syscall by setting the rt_sigreturn return value to whatever random value was in the pt_regs for r0. However, this breaks in our 64-bit kernel when running "compat" tasks, since we always sign-extend the "return value" register to properly handle returned pointers that are in the upper 2GB of the 32-bit compat address space. Doing this to the sigreturn path then causes occasional random corruption of the 64-bit r0 register. Instead, we stop doing the crazy "load the return-value register" hack in sigreturn. We already have some sigreturn-specific assembly code that we use to pass the pt_regs pointer to C code. We extend that code to also set the link register to point to a spot a few instructions after the usual syscall return address so we don't clobber the saved r0. Now it no longer matters what the rt_sigreturn syscall returns, and the pt_regs structure can be cleanly and completely reloaded. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>		2010-12-17 16:59:29 -05:00
..
asm-offsets.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
atomic_32.h	arch/tile: Various cleanups.	2010-08-13 08:52:19 -04:00
atomic.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
auxvec.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
backtrace.h	arch/tile: support new info op generated by compiler	2010-10-15 15:39:25 -04:00
bitops_32.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
bitops.h	bitops: make asm-generic/bitops/find.h more generic	2010-10-09 21:51:44 +02:00
bitsperlong.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
bug.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
bugs.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
byteorder.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
cache.h	arch/tile: rename ARCH_KMALLOC_MINALIGN to ARCH_DMA_MINALIGN	2010-08-15 11:05:33 -04:00
cacheflush.h	drivers/net/tile/: on-chip network drivers for the tile architecture	2010-11-24 13:11:18 -05:00
checksum.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
compat.h	arch/tile: Use <asm-generic/syscalls.h>	2010-10-14 14:34:33 -04:00
cputime.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
current.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
delay.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
device.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
div64.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
dma-mapping.h	dma-mapping: remove dma_is_consistent API	2010-08-11 08:59:21 -07:00
dma.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
elf.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
emergency-restart.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
errno.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
fcntl.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
fixmap.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
ftrace.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
futex.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
hardirq.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
hardwall.h	arch/tile: Add driver to enable access to the user dynamic network.	2010-07-06 13:34:15 -04:00
highmem.h	arch/tile: complete migration to new kmap_atomic scheme	2010-11-01 15:30:36 -04:00
homecache.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
hugetlb.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
hv_driver.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
hw_irq.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
ide.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
io.h	pci root complex: support for tile architecture	2010-11-24 13:13:49 -05:00
ioctl.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
ioctls.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
ipc.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
ipcbuf.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
irq_regs.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
irq.h	arch/tile: Enable more sophisticated IRQ model for 32-bit chips.	2010-07-06 13:34:01 -04:00
irqflags.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2010-10-26 17:25:38 -07:00
Kbuild	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
kdebug.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
kexec.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
kmap_types.h	arch/tile: complete migration to new kmap_atomic scheme	2010-11-01 15:30:36 -04:00
linkage.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
local.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
memprof.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
mman.h	arch/tile: provide a definition of MAP_STACK	2010-10-14 15:09:02 -04:00
mmu_context.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
mmu.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
mmzone.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
module.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
msgbuf.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
mutex.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
opcode_constants_32.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
opcode_constants_64.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
opcode_constants.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
opcode-tile_32.h	arch/tile: Shrink the tile-opcode files considerably.	2010-07-06 13:40:56 -04:00
opcode-tile_64.h	arch/tile: Shrink the tile-opcode files considerably.	2010-07-06 13:40:56 -04:00
opcode-tile.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
page.h	arch/tile: parameterize system PLs to support KVM port	2010-10-15 15:38:09 -04:00
param.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
pci.h	pci root complex: support for tile architecture	2010-11-24 13:13:49 -05:00
percpu.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
pgalloc.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
pgtable_32.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
pgtable.h	arch/tile: complete migration to new kmap_atomic scheme	2010-11-01 15:30:36 -04:00
poll.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
posix_types.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
processor.h	drivers/net/tile/: on-chip network drivers for the tile architecture	2010-11-24 13:11:18 -05:00
ptrace.h	arch/tile: parameterize system PLs to support KVM port	2010-10-15 15:38:09 -04:00
resource.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
scatterlist.h	tile: remove unused ISA_DMA_THRESHOLD define	2010-08-11 10:38:06 -04:00
sections.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
sembuf.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
setup.h	arch/tile: export only COMMAND_LINE_SIZE to userspace.	2010-08-15 12:14:41 -04:00
shmbuf.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
shmparam.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
sigcontext.h	arch/tile: Change struct sigcontext to be more useful	2010-09-15 11:16:08 -04:00
sigframe.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
siginfo.h	arch/tile: Fix a couple of issues with the COMPAT code for TILE-Gx.	2010-08-13 08:32:21 -04:00
signal.h	arch/tile: handle rt_sigreturn() more cleanly	2010-12-17 16:59:29 -05:00
smp.h	arch/tile: Enable more sophisticated IRQ model for 32-bit chips.	2010-07-06 13:34:01 -04:00
socket.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
sockios.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
spinlock_32.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
spinlock_types.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
spinlock.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
stack.h	arch/tile: Miscellaneous cleanup changes.	2010-07-06 13:41:51 -04:00
stat.h	asm-generic/stat.h: support 64-bit file time_t for stat()	2010-11-01 15:31:29 -04:00
statfs.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
string.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
swab.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
syscall.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
syscalls.h	arch/tile: Use <asm-generic/syscalls.h>	2010-10-14 14:34:33 -04:00
system.h	arch/tile: parameterize system PLs to support KVM port	2010-10-15 15:38:09 -04:00
termbits.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
termios.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
thread_info.h	arch/tile: catch up on various minor cleanups.	2010-07-06 13:42:15 -04:00
timex.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
tlb.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
tlbflush.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
topology.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
traps.h	arch/tile: enable single-step support for TILE-Gx	2010-10-15 15:38:26 -04:00
types.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
uaccess.h	arch/tile: Various cleanups.	2010-08-13 08:52:19 -04:00
ucontext.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
unaligned.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
unistd.h	asm-generic/stat.h: support 64-bit file time_t for stat()	2010-11-01 15:31:29 -04:00
user.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00
xor.h	arch/tile: core support for Tilera 32-bit chips.	2010-06-04 17:11:18 -04:00