[PATCH 11/12] M68K Linux: Define regset structures.

Andreas Arnez
2014-05-26T16:37:03Z

gdb/
* m68klinux-tdep.c: Include "regset.h".
(m68k_linux_gregmap, m68k_linux_fpregmap): New register maps.
(M68K_LINUX_GREGS_SIZE, M68K_LINUX_FPREGS_SIZE): New macros.
(m68k_linux_gregset, m68k_linux_fpregset): New regsets.
(m68k_linux_regset_from_core_section): New function.
(m68k_linux_init_abi): Set regset_from_core_section gdbarch
method.
---
gdb/m68klinux-tdep.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 65 insertions(+)

diff --git a/gdb/m68klinux-tdep.c b/gdb/m68klinux-tdep.c
index f6fed38..8967d28 100644
--- a/gdb/m68klinux-tdep.c
+++ b/gdb/m68klinux-tdep.c
@@ -38,6 +38,7 @@
#include "observer.h"
#include "elf/common.h"
#include "linux-tdep.h"
+#include "regset.h"
\f
/* Offsets (in target ints) into jmp_buf. */

@@ -327,6 +328,66 @@ static const struct frame_unwind m68k_linux_sigtramp_frame_unwind =
m68k_linux_sigtramp_frame_sniffer
};

+/* Register maps for supply/collect regset functions. */
+
+static const struct regcache_map_entry m68k_linux_gregmap[] =
+ {
+ { 7, M68K_D1_REGNUM }, /* d1 ... d7 */
+ { 7, M68K_A0_REGNUM }, /* a0 ... a6 */
+ { 1, M68K_D0_REGNUM },
+ { 1, M68K_SP_REGNUM },
+ { 4, REGCACHE_MAP_SKIP_BYTES }, /* orig_d0 (skip) */
+ { 1, M68K_PS_REGNUM },
+ { 1, M68K_PC_REGNUM },
+ { 0 }
+ };
+
+#define M68K_LINUX_GREGS_SIZE (19 * 4)
+
+static const struct regcache_map_entry m68k_linux_fpregmap[] =
+ {
+ { 8, M68K_FP0_REGNUM }, /* fp0 ... fp7 */
+ { 1, M68K_FPC_REGNUM },
+ { 1, M68K_FPS_REGNUM },
+ { 1, M68K_FPI_REGNUM },
+ { 0 }
+ };
+
+#define M68K_LINUX_FPREGS_SIZE (27 * 4)
+
+/* Register sets. */
+
+static const struct regset m68k_linux_gregset =
+ {
+ m68k_linux_gregmap,
+ regcache_supply_regset, regcache_collect_regset
+ };
+
+static const struct regset m68k_linux_fpregset =
+ {
+ m68k_linux_fpregmap,
+ regcache_supply_regset, regcache_collect_regset
+ };
+
+/* Return the appropriate register set for the core section identified
+ by SECT_NAME and SECT_SIZE. */
+
+static const struct regset *
+m68k_linux_regset_from_core_section (struct gdbarch *gdbarch,
+ const char *sect_name,
+ size_t sect_size)
+{
+ if (strcmp (sect_name, ".reg") == 0
+ && sect_size >= M68K_LINUX_GREGS_SIZE)
+ return &m68k_linux_gregset;
+
+ if (strcmp (sect_name, ".reg2") == 0
+ && sect_size >= M68K_LINUX_FPREGS_SIZE)
+ return &m68k_linux_fpregset;
+
+ return NULL;
+}
+
static void
m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
@@ -361,6 +422,10 @@ m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)

set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);

+ /* Core file support. */
+ set_gdbarch_regset_from_core_section
+ (gdbarch, m68k_linux_regset_from_core_section);
+
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
--
1.8.4.2