These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / tools / perf / arch / powerpc / util / sym-handling.c

diff --git a/kernel/tools/perf/arch/powerpc/util/sym-handling.c b/kernel/tools/perf/arch/powerpc/util/sym-handling.c
new file mode 100644 (file)
index 0000000..bbc1a50
--- /dev/null
+++ b/kernel/tools/perf/arch/powerpc/util/sym-handling.c
@@ -0,0 +1,82 @@
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ *
+ * Copyright (C) 2015 Naveen N. Rao, IBM Corporation
+ */
+
+#include "debug.h"
+#include "symbol.h"
+#include "map.h"
+#include "probe-event.h"
+
+#ifdef HAVE_LIBELF_SUPPORT
+bool elf__needs_adjust_symbols(GElf_Ehdr ehdr)
+{
+       return ehdr.e_type == ET_EXEC ||
+              ehdr.e_type == ET_REL ||
+              ehdr.e_type == ET_DYN;
+}
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+void arch__elf_sym_adjust(GElf_Sym *sym)
+{
+       sym->st_value += PPC64_LOCAL_ENTRY_OFFSET(sym->st_other);
+}
+#endif
+#endif
+
+#if !defined(_CALL_ELF) || _CALL_ELF != 2
+int arch__choose_best_symbol(struct symbol *syma,
+                            struct symbol *symb __maybe_unused)
+{
+       char *sym = syma->name;
+
+       /* Skip over any initial dot */
+       if (*sym == '.')
+               sym++;
+
+       /* Avoid "SyS" kernel syscall aliases */
+       if (strlen(sym) >= 3 && !strncmp(sym, "SyS", 3))
+               return SYMBOL_B;
+       if (strlen(sym) >= 10 && !strncmp(sym, "compat_SyS", 10))
+               return SYMBOL_B;
+
+       return SYMBOL_A;
+}
+
+/* Allow matching against dot variants */
+int arch__compare_symbol_names(const char *namea, const char *nameb)
+{
+       /* Skip over initial dot */
+       if (*namea == '.')
+               namea++;
+       if (*nameb == '.')
+               nameb++;
+
+       return strcmp(namea, nameb);
+}
+#endif
+
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+bool arch__prefers_symtab(void)
+{
+       return true;
+}
+
+#define PPC64LE_LEP_OFFSET     8
+
+void arch__fix_tev_from_maps(struct perf_probe_event *pev,
+                            struct probe_trace_event *tev, struct map *map)
+{
+       /*
+        * ppc64 ABIv2 local entry point is currently always 2 instructions
+        * (8 bytes) after the global entry point.
+        */
+       if (!pev->uprobes && map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
+               tev->point.address += PPC64LE_LEP_OFFSET;
+               tev->point.offset += PPC64LE_LEP_OFFSET;
+       }
+}
+#endif