diff options
| -rw-r--r-- | gdb/ChangeLog | 4 | ||||
| -rw-r--r-- | gdb/frame.c | 18 |
2 files changed, 22 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 65f60a9..b88390d 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,7 @@ +2008-09-19 Andrew Stubbs <ams@codesourcery.com> + + * frame.c (get_frame_register_bytes): Detect bad debug info. + 2008-09-17 Jan Kratochvil <jan.kratochvil@redhat.com> Fix a crash on uninitialized ECS->EVENT_THREAD for a newly found thread. diff --git a/gdb/frame.c b/gdb/frame.c index 55ded7168..88d51f7 100644 --- a/gdb/frame.c +++ b/gdb/frame.c @@ -796,6 +796,8 @@ get_frame_register_bytes (struct frame_info *frame, int regnum, CORE_ADDR offset, int len, gdb_byte *myaddr) { struct gdbarch *gdbarch = get_frame_arch (frame); + int i; + int maxsize; /* Skip registers wholly inside of OFFSET. */ while (offset >= register_size (gdbarch, regnum)) @@ -804,6 +806,22 @@ get_frame_register_bytes (struct frame_info *frame, int regnum, regnum++; } + /* Detect bad debug info. */ + maxsize = -offset; + for (i = regnum; i < gdbarch_num_regs (gdbarch); i++) + { + int thissize = register_size (gdbarch, i); + if (thissize == 0) + break; + maxsize += thissize; + } + if (len > maxsize) + { + warning (_("Bad debug information detected: " + "Attempt to read %d bytes from registers."), len); + return 0; + } + /* Copy the data. */ while (len > 0) { |