* [PATCH] gdb/hppa: guess g packet size
@ 2024-02-28 20:20 Sven Schnelle
2024-03-18 17:30 ` Sven Schnelle
0 siblings, 1 reply; 2+ messages in thread
From: Sven Schnelle @ 2024-02-28 20:20 UTC (permalink / raw)
To: gdb-patches; +Cc: deller, Richard Henderson, Sven Schnelle
With qemu supporting 64 bit now, add some code to determine the
register size of a hppa remote target. This first checks the
PROPERTY_GP32/PROPERTY_GP64 flags in target_desc, and uses
bfd_arch_info as fallback.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
---
gdb/hppa-tdep.c | 47 ++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 42 insertions(+), 5 deletions(-)
diff --git a/gdb/hppa-tdep.c b/gdb/hppa-tdep.c
index 30128bafac4..d501e8470b6 100644
--- a/gdb/hppa-tdep.c
+++ b/gdb/hppa-tdep.c
@@ -34,6 +34,8 @@
#include "frame-unwind.h"
#include "frame-base.h"
+#include "remote.h"
+#include "target-descriptions.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "gdbtypes.h"
@@ -43,6 +45,14 @@
static bool hppa_debug = false;
+/* Properties (for struct target_desc) describing the g/G packet
+ layout. */
+#define PROPERTY_GP32 "internal: transfers-32bit-registers"
+#define PROPERTY_GP64 "internal: transfers-64bit-registers"
+
+struct target_desc *hppa_tdesc32;
+struct target_desc *hppa_tdesc64;
+
/* Some local constants. */
static const int hppa32_num_regs = 128;
static const int hppa64_num_regs = 96;
@@ -2978,6 +2988,17 @@ hppa_skip_trampoline_code (const frame_info_ptr &frame, CORE_ADDR pc)
-- chastain 2003-12-18 */
+static void
+hppa_register_g_packet_guesses (struct gdbarch *gdbarch)
+{
+ /* If the size matches the set of 32-bit or 64-bit integer registers,
+ assume that's what we've got. */
+ register_remote_g_packet_guess (gdbarch, hppa32_num_regs * 4, hppa_tdesc32);
+ register_remote_g_packet_guess (gdbarch, hppa64_num_regs * 8, hppa_tdesc64);
+
+ /* Otherwise we don't have a useful guess. */
+}
+
static struct gdbarch *
hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
@@ -2991,14 +3012,24 @@ hppa_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
= gdbarch_alloc (&info, gdbarch_tdep_up (new hppa_gdbarch_tdep));
hppa_gdbarch_tdep *tdep = gdbarch_tdep<hppa_gdbarch_tdep> (gdbarch);
- /* Determine from the bfd_arch_info structure if we are dealing with
- a 32 or 64 bits architecture. If the bfd_arch_info is not available,
- then default to a 32bit machine. */
- if (info.bfd_arch_info != NULL)
+ /* Determine from the target description if we are dealing with
+ a 32 or 64 bits architecture. If the target description is not
+ available, then check whether bfd_arch_info could be used.
+ Otherwise default to a 32bit machine.
+ */
+ if (info.target_desc != NULL) {
+ if (tdesc_property (info.target_desc, PROPERTY_GP64) != NULL)
+ tdep->bytes_per_address = 8;
+ else if (tdesc_property (info.target_desc, PROPERTY_GP32) != NULL)
+ tdep->bytes_per_address = 4;
+ } else if (info.bfd_arch_info != NULL) {
tdep->bytes_per_address =
info.bfd_arch_info->bits_per_address / info.bfd_arch_info->bits_per_byte;
- else
+ } else {
tdep->bytes_per_address = 4;
+ }
+
+ hppa_register_g_packet_guesses (gdbarch);
tdep->find_global_pointer = hppa_find_global_pointer;
@@ -3125,6 +3156,12 @@ _initialize_hppa_tdep ()
{
gdbarch_register (bfd_arch_hppa, hppa_gdbarch_init, hppa_dump_tdep);
+ hppa_tdesc32 = allocate_target_description ().release ();
+ set_tdesc_property (hppa_tdesc32, PROPERTY_GP32, "");
+
+ hppa_tdesc64 = allocate_target_description ().release ();
+ set_tdesc_property (hppa_tdesc64, PROPERTY_GP64, "");
+
add_cmd ("unwind", class_maintenance, unwind_command,
_("Print unwind table entry at given address."),
&maintenanceprintlist);
--
2.43.2
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] gdb/hppa: guess g packet size
2024-02-28 20:20 [PATCH] gdb/hppa: guess g packet size Sven Schnelle
@ 2024-03-18 17:30 ` Sven Schnelle
0 siblings, 0 replies; 2+ messages in thread
From: Sven Schnelle @ 2024-03-18 17:30 UTC (permalink / raw)
To: gdb-patches; +Cc: svens
svens@stackframe.org (Sven Schnelle) writes:
> With qemu supporting 64 bit now, add some code to determine the
> register size of a hppa remote target. This first checks the
> PROPERTY_GP32/PROPERTY_GP64 flags in target_desc, and uses
> bfd_arch_info as fallback.
>
> Signed-off-by: Sven Schnelle <svens@stackframe.org>
> ---
> gdb/hppa-tdep.c | 47 ++++++++++++++++++++++++++++++++++++++++++-----
> 1 file changed, 42 insertions(+), 5 deletions(-)
Gentle ping?
Thanks!
Sven
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2024-03-18 17:30 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2024-02-28 20:20 [PATCH] gdb/hppa: guess g packet size Sven Schnelle
2024-03-18 17:30 ` Sven Schnelle
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox