accel/tcg: Add debuginfo support

Add libdw-based functions for loading and querying debuginfo. Load
debuginfo from the system and the linux-user loaders.

This is useful for the upcoming perf support, which can then put
human-readable guest symbols instead of raw guest PCs into perfmap and
jitdump files.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230112152013.125680-3-iii@linux.ibm.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/hw/core/loader.c b/hw/core/loader.c
index 0548830..55dbe2e 100644
--- a/hw/core/loader.c
+++ b/hw/core/loader.c
@@ -61,6 +61,7 @@
 #include "hw/boards.h"
 #include "qemu/cutils.h"
 #include "sysemu/runstate.h"
+#include "accel/tcg/debuginfo.h"
 
 #include <zlib.h>
 
@@ -503,6 +504,10 @@ ssize_t load_elf_ram_sym(const char *filename,
                          clear_lsb, data_swab, as, load_rom, sym_cb);
     }
 
+    if (ret != ELF_LOAD_FAILED) {
+        debuginfo_report_elf(filename, fd, 0);
+    }
+
  fail:
     close(fd);
     return ret;