gdb/linux-tdep.c: Add Perms to the 'info proc mappings' output

[binutils-gdb.git] / gdb / arch / aarch64-mte-linux.c

diff --git a/gdb/arch/aarch64-mte-linux.c b/gdb/arch/aarch64-mte-linux.c
index 3d72b8db308ac6547471d9200fcdd3823f19e42c..fc7a8cc00f70d705fb66662039808cf080db7b6b 100644 (file)
--- a/gdb/arch/aarch64-mte-linux.c
+++ b/gdb/arch/aarch64-mte-linux.c
@@ -1,6 +1,6 @@
 /* Common Linux target-dependent functionality for AArch64 MTE
 
-   Copyright (C) 2021 Free Software Foundation, Inc.
+   Copyright (C) 2021-2022 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -31,8 +31,47 @@ aarch64_mte_get_tag_granules (CORE_ADDR addr, size_t len, size_t granule_size)
   /* Start address */
   CORE_ADDR s_addr = align_down (addr, granule_size);
   /* End address */
-  CORE_ADDR e_addr = align_down (addr + len, granule_size);
+  CORE_ADDR e_addr = align_down (addr + len - 1, granule_size);
 
-  /* We always have at least 1 granule.  */
+  /* We always have at least 1 granule because len is non-zero at this
+     point.  */
   return 1 + (e_addr - s_addr) / granule_size;
 }
+
+/* See arch/aarch64-mte-linux.h */
+
+CORE_ADDR
+aarch64_mte_make_ltag_bits (CORE_ADDR value)
+{
+  return value & AARCH64_MTE_LOGICAL_MAX_VALUE;
+}
+
+/* See arch/aarch64-mte-linux.h */
+
+CORE_ADDR
+aarch64_mte_make_ltag (CORE_ADDR value)
+{
+  return (aarch64_mte_make_ltag_bits (value)
+         << AARCH64_MTE_LOGICAL_TAG_START_BIT);
+}
+
+/* See arch/aarch64-mte-linux.h */
+
+CORE_ADDR
+aarch64_mte_set_ltag (CORE_ADDR address, CORE_ADDR tag)
+{
+  /* Remove the existing tag.  */
+  address &= ~aarch64_mte_make_ltag (AARCH64_MTE_LOGICAL_MAX_VALUE);
+
+  /* Return the new tagged address.  */
+  return address | aarch64_mte_make_ltag (tag);
+}
+
+/* See arch/aarch64-mte-linux.h */
+
+CORE_ADDR
+aarch64_mte_get_ltag (CORE_ADDR address)
+{
+  CORE_ADDR ltag_addr = address >> AARCH64_MTE_LOGICAL_TAG_START_BIT;
+  return aarch64_mte_make_ltag_bits (ltag_addr);
+}