[v2,2/2] libgloss: pru: Trim crt0-minrt.o
Commit Message
Strip a few more instructions from crt0-minrt.S:
- Remove "halt" and rely on the infinite loop after main()'s return.
- Remove main()'s argc and argv argument initialization. Host loader
does not set them, and typical firmware does not use them, either.
- Remove the __dso_handle symbol.
This should be safe because the default crt0.S is fully standards
compliant. Whereas crt0-minrt.S has been documented from the beginning
to intentionally miss features in order to reduce firmware size, while
still enabling typical PRU firmware to operate.
Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
---
libgloss/pru/crt0-minrt.S | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
@@ -38,22 +38,9 @@ _start:
/* DATA and BSS are handled by the loader, so nothing to do here. */
- /* Just in case main() tries to access argc, argv[] and envp. */
- zero r14, 3 * 4
-
- /* Call main. */
+ /* Call main. Assume argc and argv are not used with -minrt! */
call main
/* We should never reach here. */
_crt_exit:
- halt
jmp _crt_exit
-
- /* PRU obviously has no shared libraries, but dso_handle
- helps to achieve better GCC test coverage. Besides,
- it should be free with minrt. */
- .section .data
- .global __dso_handle
- .weak __dso_handle
-__dso_handle:
- .long 0