diff options
Diffstat (limited to 'gdb/i386-cygwin-tdep.c')
| -rw-r--r-- | gdb/i386-cygwin-tdep.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/gdb/i386-cygwin-tdep.c b/gdb/i386-cygwin-tdep.c index b07911b..5911ec9 100644 --- a/gdb/i386-cygwin-tdep.c +++ b/gdb/i386-cygwin-tdep.c @@ -20,8 +20,37 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "gdb_string.h" +#include "gdbcore.h" #include "i386-tdep.h" #include "osabi.h" +#include "frame.h" +#include "dummy-frame.h" + +static int +i386_cygwin_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe) +{ + /* In the context where this is used, we get the saved PC before we've + successfully unwound far enough to be sure what we've got (it may + be a signal handler caller). If we're dealing with a signal + handler caller, this will return valid, which is fine. If not, + it'll make the correct test. */ + return ((get_frame_type (thisframe) == SIGTRAMP_FRAME) || chain != 0); +} +/* Return the chain-pointer for FRAME. In the case of the i386, the + frame's nominal address is the address of a 4-byte word containing + the calling frame's address. */ +static CORE_ADDR +i386_cygwin_frame_chain (struct frame_info *frame) +{ + if (pc_in_dummy_frame (get_frame_pc (frame))) + return get_frame_base (frame); + + if (get_frame_type (frame) == SIGTRAMP_FRAME + || i386_frameless_signal_p (frame)) + return get_frame_base (frame); + + return read_memory_unsigned_integer (get_frame_base (frame), 4); +} static void i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) @@ -29,6 +58,8 @@ i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); tdep->struct_return = reg_struct_return; + set_gdbarch_deprecated_frame_chain (gdbarch, i386_cygwin_frame_chain); + set_gdbarch_deprecated_frame_chain_valid (gdbarch, i386_cygwin_frame_chain_valid); } static enum gdb_osabi |