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tile: support GENERIC_KERNEL_THREAD and GENERIC_KERNEL_EXECVE

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Also provide an optimized current_pt_regs() while we're at it.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Chris Metcalf
2012-10-19 16:25:12 -04:00
committed by Al Viro
parent 733deca197
commit 0f8b983812
6 changed files with 75 additions and 76 deletions
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11
arch/tile/kernel/entry.S
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@@ -27,17 +27,6 @@ STD_ENTRY(current_text_addr)
{ move r0, lr; jrp lr }
STD_ENDPROC(current_text_addr)
/*
* Implement execve(). The i386 code has a note that forking from kernel
* space results in no copy on write until the execve, so we should be
* careful not to write to the stack here.
*/
STD_ENTRY(kernel_execve)
moveli TREG_SYSCALL_NR_NAME, __NR_execve
swint1
jrp lr
STD_ENDPROC(kernel_execve)
/*
* We don't run this function directly, but instead copy it to a page
* we map into every user process. See vdso_setup().