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| author |   David S. Miller <davem@sunset.davemloft.net> | 2005-09-29 18:50:34 -0700 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2005-09-29 18:50:34 -0700 |
| commit | 717463d806a53380a691eeb0136a4b750a9f9ae0 (patch) | |
| tree | a9c76e59662916d133362a5266bb61dc2586344b | |
| parent | [SPARC64]: Kill arch/sparc64/prom/memory.c (diff) | |
| download | linux-dev-717463d806a53380a691eeb0136a4b750a9f9ae0.tar.xz linux-dev-717463d806a53380a691eeb0136a4b750a9f9ae0.zip | |
[SPARC64]: Fix several bugs in flush_ptrace_access().
1) Use cpudata cache line sizes, not magic constants.
2) Align start address in cheetah case so we do not get
unaligned address traps. (pgrep was good at triggering
this, via /proc/${pid}/cmdline accesses)
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | arch/sparc64/kernel/ptrace.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/arch/sparc64/kernel/ptrace.c b/arch/sparc64/kernel/ptrace.c index 5efbff90d668..774ecbb8a031 100644 --- a/arch/sparc64/kernel/ptrace.c +++ b/arch/sparc64/kernel/ptrace.c @@ -31,6 +31,7 @@ #include <asm/visasm.h> #include <asm/spitfire.h> #include <asm/page.h> +#include <asm/cpudata.h> /* Returning from ptrace is a bit tricky because the syscall return * low level code assumes any value returned which is negative and @@ -132,12 +133,16 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, if ((uaddr ^ (unsigned long) kaddr) & (1UL << 13)) { unsigned long start = __pa(kaddr); unsigned long end = start + len; + unsigned long dcache_line_size; + + dcache_line_size = local_cpu_data().dcache_line_size; if (tlb_type == spitfire) { - for (; start < end; start += 32) + for (; start < end; start += dcache_line_size) spitfire_put_dcache_tag(start & 0x3fe0, 0x0); } else { - for (; start < end; start += 32) + start &= ~(dcache_line_size - 1); + for (; start < end; start += dcache_line_size) __asm__ __volatile__( "stxa %%g0, [%0] %1\n\t" "membar #Sync" @@ -150,8 +155,11 @@ void flush_ptrace_access(struct vm_area_struct *vma, struct page *page, if (write && tlb_type == spitfire) { unsigned long start = (unsigned long) kaddr; unsigned long end = start + len; + unsigned long icache_line_size; + + icache_line_size = local_cpu_data().icache_line_size; - for (; start < end; start += 32) + for (; start < end; start += icache_line_size) flushi(start); } } |