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| author | grehan <grehan@FreeBSD.org> | 2006-12-05 04:01:52 +0000 |
|---|---|---|
| committer | grehan <grehan@FreeBSD.org> | 2006-12-05 04:01:52 +0000 |
| commit | 8d87f5baaa75c2a2b7056fbb972938279cee88f7 (patch) | |
| tree | 3403144535091ef5fcdb4c1243c91d984e07d700 /sys/powerpc/include | |
| parent | 4fdcb8965edb8a590b44f829b781bf01588c1b1e (diff) | |
| download | FreeBSD-src-8d87f5baaa75c2a2b7056fbb972938279cee88f7.zip FreeBSD-src-8d87f5baaa75c2a2b7056fbb972938279cee88f7.tar.gz | |
Fix gdb issue where the i-cache was not being updated when a breakpoint
was written into a user's address space. The fix is to modify uiomove_fromphys
to sync the icache when an executable user-space page is written into.
Alan Cox suggested that there should probably be a higher-level interface
to this in the ptrace code, but agreed that this is an OK short-term solution.
Files changed:
pmap.h - declaration of pmap_page_executable()
pmap_dispatch.c - pass through the page_executable call to the mmu object
mmu_oea.c - implement the page_executable method by examining the PTE_EXEC
field in the vm_page_t
uio_machdep.c - in uiomove_fromphys(), if the op was a UIO_WRITE to user-space,
and if the page is executable, sync the icache since this is at the least
a breakpoint-write from gdb.
Reported by: marcel
Tested by: marcel, grehan on g3+g4
Discussed with: alc
MFC after: 2 weeks
Diffstat (limited to 'sys/powerpc/include')
| -rw-r--r-- | sys/powerpc/include/pmap.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/powerpc/include/pmap.h b/sys/powerpc/include/pmap.h index 213d211..d02f8d6 100644 --- a/sys/powerpc/include/pmap.h +++ b/sys/powerpc/include/pmap.h @@ -95,7 +95,7 @@ void pmap_unmapdev(vm_offset_t, vm_size_t); void pmap_deactivate(struct thread *); vm_offset_t pmap_kextract(vm_offset_t); int pmap_dev_direct_mapped(vm_offset_t, vm_size_t); - +boolean_t pmap_page_executable(vm_page_t); boolean_t pmap_mmu_install(char *name, int prio); #define vtophys(va) pmap_kextract((vm_offset_t)(va)) |
