backends: Add core_note callback for LoongArch

Signed-off-by: Youling Tang <tangyouling@loongson.cn>

4 files changed, 122 insertions, 1 deletions

diff --git a/backends/ChangeLog b/backends/ChangeLog
index f1613d80..c60d6cdb 100644
--- a/backends/ChangeLog
+++ b/backends/ChangeLog
@@ -1,5 +1,11 @@
 2023-04-07  Youling Tang  <tangyouling@loongson.cn>
 
+	* Makefile.am (loongarch_SRCS): Add loongarch_corenote.c.
+	* loongarch_init.c (loongarch_init): Hook core_note.
+	* loongarch_corenote.c: New file.
+
+2023-04-07  Youling Tang  <tangyouling@loongson.cn>
+
 	* Makefile.am (loongarch_SRCS): Add loongarch_unwind.c.
 	* loongarch_init.c (loongarch_init): Hook unwind.
 	* loongarch_unwind.c: New file.
diff --git a/backends/Makefile.am b/backends/Makefile.am
index 1261f5c6..c7a953a1 100644
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -98,7 +98,7 @@ csky_SRCS = csky_attrs.c csky_init.c csky_symbol.c csky_cfi.c \
 
 loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
 	    loongarch_regs.c loongarch_retval.c \
-	    loongarch_unwind.c
+	    loongarch_unwind.c loongarch_corenote.c
 
 arc_SRCS = arc_init.c arc_symbol.c
 
diff --git a/backends/loongarch_corenote.c b/backends/loongarch_corenote.c
new file mode 100644
index 00000000..b549edc0
--- /dev/null
+++ b/backends/loongarch_corenote.c
@@ -0,0 +1,114 @@
+/* LoongArch specific core note handling.
+   Copyright (C) 2023 Loongson Technology Corporation Limited.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <elf.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/time.h>
+
+#define BACKEND loongarch_
+#include "libebl_CPU.h"
+
+#define	ULONG			uint64_t
+#define PID_T			int32_t
+#define	UID_T			uint32_t
+#define	GID_T			uint32_t
+#define ALIGN_ULONG		8
+#define ALIGN_PID_T		4
+#define ALIGN_UID_T		4
+#define ALIGN_GID_T		4
+#define TYPE_ULONG		ELF_T_XWORD
+#define TYPE_PID_T		ELF_T_SWORD
+#define TYPE_UID_T		ELF_T_WORD
+#define TYPE_GID_T		ELF_T_WORD
+
+#define PRSTATUS_REGS_SIZE	(45 * 8)
+
+static const Ebl_Register_Location prstatus_regs[] =
+  {
+    { .offset = 0, .regno = 0, .count = 32, .bits = 64 }, /* r0..r31 */
+  };
+
+#define PRSTATUS_REGSET_ITEMS						\
+  {									\
+    .name = "orig_a0", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 32 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_era", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 33 * 8),						\
+    .group = "register",						\
+    .pc_register = true							\
+  },									\
+  {									\
+    .name = "csr_badvaddr", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 34 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_crmd", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 35 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_prmd", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 36 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_euen", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 37 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_ecfg", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 38 * 8),						\
+    .group = "register"							\
+  },									\
+  {									\
+    .name = "csr_estat", .type = ELF_T_XWORD, .format = 'x',		\
+    .offset = (offsetof (struct EBLHOOK(prstatus), pr_reg)		\
+	       + 39 * 8),						\
+    .group = "register"							\
+  }
+  /* 40 ~ 44 reserved */
+
+#include "linux-core-note.c"
diff --git a/backends/loongarch_init.c b/backends/loongarch_init.c
index 1e8846a8..0b99d113 100644
--- a/backends/loongarch_init.c
+++ b/backends/loongarch_init.c
@@ -49,6 +49,7 @@ loongarch_init (Elf *elf __attribute__ ((unused)),
   HOOK (eh, reloc_simple_type);
   HOOK (eh, machine_flag_check);
   HOOK (eh, register_info);
+  HOOK (eh, core_note);
   HOOK (eh, abi_cfi);
   /* gcc/config/ #define DWARF_FRAME_REGISTERS.  */
   eh->frame_nregs = 74;