From: Luis Machado <luis.machado@linaro.org>
Date: Tue, 18 Aug 2020 19:21:04 +0000 (-0300)
Subject: AArch64: Add MTE register set support for core files
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=ffcc2a15499644040a4c6a80828cf1795d9bc54b;p=binutils-gdb.git

AArch64: Add MTE register set support for core files

This patch handles the tagged_addr_ctrl register that is exported when
generating a core file.

gdb/ChangeLog:

2021-03-24  Luis Machado  <luis.machado@linaro.org>

	* aarch64-linux-tdep.c
	(aarch64_linux_iterate_over_regset_sections): Handle MTE register set.
	* aarch64-linux-tdep.h (AARCH64_LINUX_SIZEOF_MTE_REGSET): Define.
---

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 52e0ddeb2b4..76e905ea497 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2021-03-24  Luis Machado  <luis.machado@linaro.org>
+
+	* aarch64-linux-tdep.c
+	(aarch64_linux_iterate_over_regset_sections): Handle MTE register set.
+	* aarch64-linux-tdep.h (AARCH64_LINUX_SIZEOF_MTE_REGSET): Define.
+
 2021-03-24  Luis Machado  <luis.machado@linaro.org>
 
 	* aarch64-linux-tdep.c
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 15bbdb253f9..9602fc4b29a 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -728,6 +728,26 @@ aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
 	  AARCH64_LINUX_SIZEOF_PAUTH, &aarch64_linux_pauth_regset,
 	  "pauth registers", cb_data);
     }
+
+  /* Handle MTE registers.  */
+  if (tdep->has_mte ())
+    {
+      /* Create this on the fly in order to handle the variable location.  */
+      const struct regcache_map_entry mte_regmap[] =
+	{
+	  { 1, tdep->mte_reg_base, 4},
+	  { 0 }
+	};
+
+      const struct regset aarch64_linux_mte_regset =
+	{
+	  mte_regmap, regcache_supply_regset, regcache_collect_regset
+	};
+
+      cb (".reg-aarch-mte", AARCH64_LINUX_SIZEOF_MTE_REGSET,
+	  AARCH64_LINUX_SIZEOF_MTE_REGSET, &aarch64_linux_mte_regset,
+	  "MTE registers", cb_data);
+    }
 }
 
 /* Implement the "core_read_description" gdbarch method.  */
diff --git a/gdb/aarch64-linux-tdep.h b/gdb/aarch64-linux-tdep.h
index 84c25172a9b..62a6da83494 100644
--- a/gdb/aarch64-linux-tdep.h
+++ b/gdb/aarch64-linux-tdep.h
@@ -36,6 +36,9 @@
 /* The pauth regset consists of 2 X sized registers.  */
 #define AARCH64_LINUX_SIZEOF_PAUTH (2 * X_REGISTER_SIZE)
 
+/* The MTE regset consists of a 32-bit register.  */
+#define AARCH64_LINUX_SIZEOF_MTE_REGSET (4)
+
 extern const struct regset aarch64_linux_gregset;
 extern const struct regset aarch64_linux_fpregset;