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| author | Al Viro | 2012-09-16 18:06:34 +0200 |
|---|---|---|
| committer | Al Viro | 2012-10-01 06:44:44 +0200 |
| commit | d878d6dacee2c862f02da20f7fa3e2c0e8820e71 (patch) | |
| tree | c594e7cc3d49e2af55f6fe9706a2fc618dc3f150 /arch/m68k/include | |
| parent | m68k: split ret_from_fork(), simplify kernel_thread() (diff) | |
| download | kernel-qcow2-linux-d878d6dacee2c862f02da20f7fa3e2c0e8820e71.tar.gz kernel-qcow2-linux-d878d6dacee2c862f02da20f7fa3e2c0e8820e71.tar.xz kernel-qcow2-linux-d878d6dacee2c862f02da20f7fa3e2c0e8820e71.zip | |
m68k: switch to generic sys_execve()/kernel_execve()
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>
Diffstat (limited to 'arch/m68k/include')
| -rw-r--r-- | arch/m68k/include/asm/ptrace.h | 2 | ||||
| -rw-r--r-- | arch/m68k/include/asm/unistd.h | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/arch/m68k/include/asm/ptrace.h b/arch/m68k/include/asm/ptrace.h index 65322b17b6cf..5e08b597f012 100644 --- a/arch/m68k/include/asm/ptrace.h +++ b/arch/m68k/include/asm/ptrace.h @@ -85,6 +85,8 @@ struct switch_stack { #define user_mode(regs) (!((regs)->sr & PS_S)) #define instruction_pointer(regs) ((regs)->pc) #define profile_pc(regs) instruction_pointer(regs) +#define current_pt_regs() \ + (struct pt_regs *)((char *)current_thread_info() + THREAD_SIZE) - 1 #define arch_has_single_step() (1) diff --git a/arch/m68k/include/asm/unistd.h b/arch/m68k/include/asm/unistd.h index 045cfd6a9e31..c702ad716791 100644 --- a/arch/m68k/include/asm/unistd.h +++ b/arch/m68k/include/asm/unistd.h @@ -382,6 +382,8 @@ #define __ARCH_WANT_SYS_SIGPROCMASK #define __ARCH_WANT_SYS_RT_SIGACTION #define __ARCH_WANT_SYS_RT_SIGSUSPEND +#define __ARCH_WANT_SYS_EXECVE +#define __ARCH_WANT_KERNEL_EXECVE /* * "Conditional" syscalls |