diff options
Diffstat (limited to 'libgloss/rx/gcrt0.S')
| -rw-r--r-- | libgloss/rx/gcrt0.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/libgloss/rx/gcrt0.S b/libgloss/rx/gcrt0.S new file mode 100644 index 000000000..911927c6b --- /dev/null +++ b/libgloss/rx/gcrt0.S @@ -0,0 +1,25 @@ +#define PROFILE_SUPPORT 1 + +#include "crt0.S" + + .global __mcount +__mcount: + ;; When a function is compiled for profiling, gcc creates code + ;; like this at the start of each profiled function: + ;; + ;; .global <func_name> + ;; <func_name>: + ;; bsr __mcount + ;; <...function's prologue...> + ;; <...function's body...> + ;; + ;; We must save all of the argument registers, extract the + ;; address of <func_name>, call _mcount_internal to do the + ;; real work and then restore the argument registers before + ;; returning. + + pushm r1-r4 + mov.l 16[r0], r1 + bsr __mcount_internal + rtsd #16, r1-r4 + |