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Merge "crasher: add execute-only memory ("xom")."

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Treehugger Robot 2019-04-16 12:28:25 +00:00 • committed by Gerrit Code Review
commit e1d4648f46
1 changed files with 6 additions and 0 deletions
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6
debuggerd/crasher/crasher.cpp
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@ -193,6 +193,7 @@ static int usage() {
fprintf(stderr, " kuser_memory_barrier call kuser_memory_barrier\n");
fprintf(stderr, " kuser_cmpxchg64 call kuser_cmpxchg64\n");
#endif
fprintf(stderr, " xom read execute-only memory\n");
fprintf(stderr, "\n");
fprintf(stderr, " LOG_ALWAYS_FATAL call liblog LOG_ALWAYS_FATAL\n");
fprintf(stderr, " LOG_ALWAYS_FATAL_IF call liblog LOG_ALWAYS_FATAL_IF\n");
@ -314,6 +315,11 @@ noinline int do_action(const char* arg) {
} else if (!strcasecmp(arg, "seccomp")) {
set_system_seccomp_filter();
syscall(99999);
#if defined(__LP64__)
} else if (!strcasecmp(arg, "xom")) {
// Try to read part of our code, which will fail if XOM is active.
printf("*%lx = %lx\n", reinterpret_cast<long>(usage), *reinterpret_cast<long*>(usage));
#endif
#if defined(__arm__)
} else if (!strcasecmp(arg, "kuser_helper_version")) {
return __kuser_helper_version;