Hello Matt,
On Tue, 14 Apr 2015 14:07:18 -0400, Matt Porter mporter@konsulko.com wrote:
On ARM v7M, the processor will return to ARM mode when executing a blx instruction with bit 0 of the address == 0. Always set it to 1 to stay in thumb mode.
This should be done for all targets which build with Thumb instruction set, not only ARMv7M, should it not?
Signed-off-by: Matt Porter mporter@konsulko.com
common/cmd_boot.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/common/cmd_boot.c b/common/cmd_boot.c index 8f2e070..20ce652 100644 --- a/common/cmd_boot.c +++ b/common/cmd_boot.c @@ -38,6 +38,10 @@ static int do_go(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) * pass address parameter as argv[0] (aka command name), * and all remaining args */ +#ifdef CONFIG_CPU_V7M
- /* For ARM V7M, set bit zero to stay in Thumb mode */
- addr++;
+#endif rc = do_go_exec ((void *)addr, argc - 1, argv + 1); if (rc != 0) rcode = 1;
-- 2.1.0
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Amicalement,