[PATCH] D14921: [sanitizer] Don't use ARM_VFPREGS_SIZE for old kernels.

[Maxim Ostapenko via llvm-commits]

m.ostepenko updated this revision to Diff 40928.
m.ostepenko added a comment.

Ugh, just noticed, that PTRACE_SETVFPREGS and PTRACE_GETVFPREGS were introduced in Linux 2.6.30 and ARM_VFPREGS_SIZE only in 3.0. So, struct_user_vfpregs_struct_sz = 0 is not safe for 2.6.30 - 2.6.39. Fix by defining ARM_VFPREGS_SIZE as 32 * 8 /*fpregs*/ + 4 /*fpscr*/ for these kernels.


Repository:
  rL LLVM

http://reviews.llvm.org/D14921

Files:
  lib/sanitizer_common/sanitizer_platform_limits_posix.cc

Index: lib/sanitizer_common/sanitizer_platform_limits_posix.cc
===================================================================
--- lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -123,6 +123,9 @@
 #  include <asm/ptrace.h>
 #  ifdef __arm__
 typedef struct user_fpregs elf_fpregset_t;
+#   if !defined(ARM_VFPREGS_SIZE)
+#     define ARM_VFPREGS_SIZE (32 * 8 /*fpregs*/ + 4 /*fpscr*/)
+#   endif
 #  endif
 # endif
 # include <semaphore.h>


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