On Apr 16, 2009, at 1:21 PM, Kumar Gala wrote:
Ben,
The following patch is causing me issues w/init SEGV on boot. This
is a pretty old version of init and I'm wondering what the commit
you had related to old ABI breakage:
commit 8d30c14cab30d405a05f2aaceda1e9ad57800f36
Author: Benjamin Herrenschmidt <[email protected]>
Date: Tue Feb 10 16:02:37 2009 +0000
powerpc/mm: Rework I$/D$ coherency (v3)
This patch reworks the way we do I and D cache coherency on
PowerPC.
---
/*
* Allow execution from readable areas if the MMU
does not
* provide separate controls over reading and
executing.
+ *
+ * Note: That code used to not be enabled for 4xx/
BookE.
+ * It is now as I/D cache coherency for these is
done at
+ * set_pte_at() time and I see no reason why the test
+ * below wouldn't be valid on those processors. This
-may-
+ * break programs compiled with a really old ABI
though.
*/
- k
A bit more debug info that might be helpful, I'm hitting this bad_area
fault :
if (!(vma->vm_flags & VM_EXEC) &&
(cpu_has_feature(CPU_FTR_NOEXECUTE) ||
!(vma->vm_flags & (VM_READ | VM_WRITE))))
goto bad_area;
bad_area 7 = 48024bf4 vm_flags:0810 0873
SEGV 3 address:48024bf4 trap:400 error_code:0
[root:~] cat /proc/1/maps
00100000-00103000 r-xp 00100000 00:00 0 [vdso]
0feab000-0ffbe000 r-xp 00000000 00:0d 7127086 /lib/libc-2.2.5.so
0ffbe000-0ffcb000 ---p 00113000 00:0d 7127086 /lib/libc-2.2.5.so
0ffcb000-0ffeb000 rw-p 00110000 00:0d 7127086 /lib/libc-2.2.5.so
0ffeb000-0fff0000 rw-p 0ffeb000 00:00 0
10000000-10008000 r-xp 00000000 00:0d 9093222 /sbin/init
10017000-10018000 rw-p 00007000 00:0d 9093222 /sbin/init
10018000-1001c000 rwxp 10018000 00:00 0 [heap]
48000000-48013000 r-xp 00000000 00:0d 7127082 /lib/ld-2.2.5.so
48022000-48026000 rw-p 00012000 00:0d 7127082 /lib/ld-2.2.5.so
bfd0e000-bfd23000 rwxp bffeb000 00:00 0 [stack]
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