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* [newlib-cygwin/main] libgloss: pru: Trim crt0-minrt.o
@ 2024-01-23 8:51 Corinna Vinschen
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From: Corinna Vinschen @ 2024-01-23 8:51 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=276dd12f69b1cf113a009da331d3bcfc4783fdce
commit 276dd12f69b1cf113a009da331d3bcfc4783fdce
Author: Dimitar Dimitrov <dimitar@dinux.eu>
AuthorDate: Mon Jan 22 18:11:36 2024 +0200
Commit: Corinna Vinschen <corinna@vinschen.de>
CommitDate: Tue Jan 23 09:49:02 2024 +0100
libgloss: pru: Trim crt0-minrt.o
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>
Diff:
---
libgloss/pru/crt0-minrt.S | 15 +--------------
1 file changed, 1 insertion(+), 14 deletions(-)
diff --git a/libgloss/pru/crt0-minrt.S b/libgloss/pru/crt0-minrt.S
index 60647d372e55..fa5e80af4802 100644
--- a/libgloss/pru/crt0-minrt.S
+++ b/libgloss/pru/crt0-minrt.S
@@ -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
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