target/stm8: add support for multi-architecture gdb

GDB can be built for multi-architecture through the command
	./configure --enable-targets=all && make
Such multi-architecture GDB requires the target's architecture to
be selected either manually by the user through the GDB command
"set architecture" or automatically by the target description sent
by the remote target (i.e. OpenOCD).

Commit e65acd889c61a424c7bd72fdee5d6a3aee1d8504 ("gdb_server: add
support for architecture element") already provides the required
infrastructure to support multi-architecture gdb.

The gdb patches for stm8 are still not merged in the official
repository and are temporarily hosted in
	https://stm8-binutils-gdb.sourceforge.io/
The latest patch set
	stm8-binutils-gdb-sources-2018-03-04.tar.gz
define only one possible value ("stm8") for this architecture; it
can be displayed typing "set architecture " followed by a TAB for
autocompletion in gdb for stm8.

Set the gdb architecture value for stm8 to "stm8".

Change-Id: I643ceba662de46cecf061d1dc672b9178a077f1b
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: http://openocd.zylin.com/4753
Tested-by: jenkins
Reviewed-by: Ake Rehnman <ake.rehnman@gmail.com>
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/target/stm8.c b/src/target/stm8.c
index 5a3438a6407b927e6e9e1a4164a8ba11f03004a2..9a57e44908404ed6eeac192f0437bc09cef1bc5f 100644 (file)
--- a/src/target/stm8.c
+++ b/src/target/stm8.c
@@ -1189,6 +1189,11 @@ static int stm8_write_core_reg(struct target *target, unsigned int num)
        return ERROR_OK;
 }
 
+static const char *stm8_get_gdb_arch(struct target *target)
+{
+       return "stm8";
+}
+
 static int stm8_get_gdb_reg_list(struct target *target, struct reg **reg_list[],
                int *reg_list_size, enum target_register_class reg_class)
 {
@@ -2199,6 +2204,7 @@ struct target_type stm8_target = {
        .assert_reset = stm8_reset_assert,
        .deassert_reset = stm8_reset_deassert,
 
+       .get_gdb_arch = stm8_get_gdb_arch,
        .get_gdb_reg_list = stm8_get_gdb_reg_list,
 
        .read_memory = stm8_read_memory,