m68k: switch to generic sys_execve()/kernel_execve()

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The tricky part here is that task_pt_regs() on m68k works *only* for
process inside do_signal().  However, we need something much simpler -
pt_regs of a process inside do_signal() may be at different offsets
from the stack bottom, depending on the way we'd entered the kernel,
but for a task inside sys_execve() it *is* at constant offset.
Moreover, for a kernel thread about to become a userland process the
same location is also fine - setting sp to that will leave the kernel
stack pointer at the very bottom of the kernel stack when we finally
switch to userland.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

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This commit is contained in:

Al Viro 2012-09-16 12:06:34 -04:00

parent 533e6903be

commit d878d6dace

5 changed files with 9 additions and 37 deletions

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2

arch/m68k/include/asm/ptrace.h

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2

arch/m68k/include/asm/unistd.h

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5

arch/m68k/kernel/entry.S

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20

arch/m68k/kernel/process.c

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17

arch/m68k/kernel/sys_m68k.c

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