Multi-target support

[deliverable/binutils-gdb.git] / gdb / riscv-fbsd-tdep.c

diff --git a/gdb/riscv-fbsd-tdep.c b/gdb/riscv-fbsd-tdep.c
index 6914efb6c179cdc783bf3d01e659394547b50fee..157907373c4e16d3a9a433000588451238851c3c 100644 (file)
--- a/gdb/riscv-fbsd-tdep.c
+++ b/gdb/riscv-fbsd-tdep.c
@@ -1,5 +1,5 @@
 /* Target-dependent code for FreeBSD on RISC-V processors.
-   Copyright (C) 2018 Free Software Foundation, Inc.
+   Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -25,6 +25,8 @@
 #include "target.h"
 #include "trad-frame.h"
 #include "tramp-frame.h"
+#include "gdbarch.h"
+#include "inferior.h"
 
 /* Register maps.  */
 
@@ -174,6 +176,29 @@ static const struct tramp_frame riscv_fbsd_sigframe =
   riscv_fbsd_sigframe_init
 };
 
+/* Implement the "get_thread_local_address" gdbarch method.  */
+
+static CORE_ADDR
+riscv_fbsd_get_thread_local_address (struct gdbarch *gdbarch, ptid_t ptid,
+                                    CORE_ADDR lm_addr, CORE_ADDR offset)
+{
+  struct regcache *regcache;
+
+  regcache = get_thread_arch_regcache (current_inferior ()->process_target (),
+                                      ptid, gdbarch);
+
+  target_fetch_registers (regcache, RISCV_TP_REGNUM);
+
+  ULONGEST tp;
+  if (regcache->cooked_read (RISCV_TP_REGNUM, &tp) != REG_VALID)
+    error (_("Unable to fetch %%tp"));
+
+  /* %tp points to the end of the TCB which contains two pointers.
+      The first pointer in the TCB points to the DTV array.  */
+  CORE_ADDR dtv_addr = tp - (gdbarch_ptr_bit (gdbarch) / 8) * 2;
+  return fbsd_get_thread_local_address (gdbarch, dtv_addr, lm_addr, offset);
+}
+
 /* Implement the 'init_osabi' method of struct gdb_osabi_handler.  */
 
 static void
@@ -193,6 +218,11 @@ riscv_fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
 
   set_gdbarch_iterate_over_regset_sections
     (gdbarch, riscv_fbsd_iterate_over_regset_sections);
+
+  set_gdbarch_fetch_tls_load_module_address (gdbarch,
+                                            svr4_fetch_objfile_link_map);
+  set_gdbarch_get_thread_local_address (gdbarch,
+                                       riscv_fbsd_get_thread_local_address);
 }
 
 void