8e8ff02c0b
This modification is required to fix debugging function for m32r targets with !CONFIG_ISA_DSP_LEVEL2, by unifying 'struct pt_regs' and 'struct sigcontext' size for all M32R ISA. Some m32r processor core with !CONFIG_ISA_DSP_LEVEL2 configuration has only single accumulator a0 (ex. VDEC2 core, M32102 core, etc.), the others with CONFIG_ISA_DSP_LEVEL2 has two accumulators, a0 and a1. This means there are two variations of thread context. So far, we reduced and changed stackframe size at a syscall for their context size. However, this causes a problem that a GDB for processors with CONFIG_ISA_DSP_LEVEL2 cannot be used for processors with !CONFIG_ISA_DSP_LEVEL2. From the viewpoint of GDB support, we should reduce such variation of stackframe size for simplicity. In this patch, dummy members are added to 'struct pt_regs' and 'struct sigcontext' to adjust their size for !CONFIG_ISA_DSP_LEVEL2. This modification is also a one step for a GDB update in future. Currently, on the m32r, GDB can access process's context by using ptrace functions in a simple way of register by register access. By unifying stackframe size, we have a possibility to make use of ptrace functions of not only a single register access but also block register access, PTRACE_{GETREGS,PUTREGS}. However, for this purpose, we might have to modify stackframe structure some more; for example, PSW (processor status word) register should be pre-processed before pushing to stack at a syscall, and so on. In this case, we must update carefully both kernel and GDB at a time... Signed-off-by: Hayato Fujiwara <fujiwara@linux-m32r.org> Signed-off-by: Hirokazu Takata <takata@linux-m32r.org> Cc: Kei Sakamoto <ksakamot@linux-m32r.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org> |
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m32104ut | ||
m32700ut | ||
mappi2 | ||
mappi3 | ||
opsput | ||
a.out.h | ||
addrspace.h | ||
assembler.h | ||
atomic.h | ||
auxvec.h | ||
bitops.h | ||
bug.h | ||
bugs.h | ||
byteorder.h | ||
cache.h | ||
cachectl.h | ||
cacheflush.h | ||
checksum.h | ||
cputime.h | ||
current.h | ||
delay.h | ||
div64.h | ||
dma-mapping.h | ||
dma.h | ||
elf.h | ||
emergency-restart.h | ||
errno.h | ||
fcntl.h | ||
flat.h | ||
futex.h | ||
hardirq.h | ||
hw_irq.h | ||
ide.h | ||
io.h | ||
ioctl.h | ||
ioctls.h | ||
ipc.h | ||
ipcbuf.h | ||
irq.h | ||
kmap_types.h | ||
linkage.h | ||
local.h | ||
m32r_mp_fpga.h | ||
m32r.h | ||
m32102.h | ||
mc146818rtc.h | ||
mman.h | ||
mmu_context.h | ||
mmu.h | ||
mmzone.h | ||
module.h | ||
msgbuf.h | ||
mutex.h | ||
namei.h | ||
page.h | ||
param.h | ||
pci.h | ||
percpu.h | ||
pgalloc.h | ||
pgtable-2level.h | ||
pgtable.h | ||
poll.h | ||
posix_types.h | ||
processor.h | ||
ptrace.h | ||
resource.h | ||
rtc.h | ||
s1d13806.h | ||
scatterlist.h | ||
sections.h | ||
segment.h | ||
semaphore.h | ||
sembuf.h | ||
serial.h | ||
setup.h | ||
shmbuf.h | ||
shmparam.h | ||
sigcontext.h | ||
siginfo.h | ||
signal.h | ||
smp.h | ||
socket.h | ||
sockios.h | ||
spinlock_types.h | ||
spinlock.h | ||
stat.h | ||
statfs.h | ||
string.h | ||
syscall.h | ||
system.h | ||
termbits.h | ||
termios.h | ||
thread_info.h | ||
timex.h | ||
tlb.h | ||
tlbflush.h | ||
topology.h | ||
types.h | ||
uaccess.h | ||
ucontext.h | ||
unaligned.h | ||
unistd.h | ||
user.h | ||
vga.h | ||
xor.h |