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-rw-r--r--gdb/target.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/gdb/target.h b/gdb/target.h
index 24c803c..c425a5b 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -543,7 +543,16 @@ struct target_ops
simultaneously? */
int (*to_supports_multi_process) (void);
- /* Determine current architecture of thread PTID. */
+ /* Determine current architecture of thread PTID.
+
+ The target is supposed to determine the architecture of the code where
+ the target is currently stopped at (on Cell, if a target is in spu_run,
+ to_thread_architecture would return SPU, otherwise PPC32 or PPC64).
+ This is architecture used to perform decr_pc_after_break adjustment,
+ and also determines the frame architecture of the innermost frame.
+ ptrace operations need to operate according to target_gdbarch.
+
+ The default implementation always returns target_gdbarch. */
struct gdbarch *(*to_thread_architecture) (struct target_ops *, ptid_t);
int to_magic;
@@ -1043,7 +1052,7 @@ extern char *normal_pid_to_str (ptid_t ptid);
#define target_pid_to_exec_file(pid) \
(current_target.to_pid_to_exec_file) (pid)
-/* Determine current architecture of thread PTID. */
+/* See the to_thread_architecture description in struct target_ops. */
#define target_thread_architecture(ptid) \
(current_target.to_thread_architecture (&current_target, ptid))