--- /dev/null
+/* Ravenscar x86-64 target support.
+
+ Copyright (C) 2020 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "gdbarch.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "amd64-tdep.h"
+#include "inferior.h"
+#include "ravenscar-thread.h"
+#include "amd64-ravenscar-thread.h"
+
+struct amd64_ravenscar_ops : public ravenscar_arch_ops
+{
+ void fetch_registers (struct regcache *regcache, int regnum) override;
+ void store_registers (struct regcache *regcache, int regnum) override;
+
+private:
+
+ /* Return the offset of the register in the context buffer. */
+ int register_offset (struct gdbarch *arch, int regnum);
+};
+
+/* x86-64 Ravenscar stores registers as:
+
+ type Context_Buffer is record
+ RIP : System.Address;
+ RFLAGS : EFLAGS;
+ RSP : System.Address;
+
+ RBX : System.Address;
+ RBP : System.Address;
+ R12 : System.Address;
+ R13 : System.Address;
+ R14 : System.Address;
+ R15 : System.Address;
+ end record;
+*/
+static const int register_layout[] =
+{
+ AMD64_RIP_REGNUM,
+ AMD64_EFLAGS_REGNUM,
+ AMD64_RSP_REGNUM,
+ AMD64_RBX_REGNUM,
+ AMD64_RBP_REGNUM,
+ AMD64_R12_REGNUM,
+ AMD64_R13_REGNUM,
+ AMD64_R14_REGNUM,
+ AMD64_R15_REGNUM,
+};
+
+int
+amd64_ravenscar_ops::register_offset (struct gdbarch *arch, int regnum)
+{
+ for (int i = 0; i < ARRAY_SIZE (register_layout); ++i)
+ if (register_layout[i] == regnum)
+ return i * 8;
+ /* Not saved. */
+ return -1;
+}
+
+/* Supply register REGNUM, which has been saved at REGISTER_ADDR, to
+ the regcache. */
+
+static void
+supply_register_at_address (struct regcache *regcache, int regnum,
+ CORE_ADDR register_addr)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ int buf_size = register_size (gdbarch, regnum);
+ gdb_byte *buf;
+
+ buf = (gdb_byte *) alloca (buf_size);
+ read_memory (register_addr, buf, buf_size);
+ regcache->raw_supply (regnum, buf);
+}
+
+void
+amd64_ravenscar_ops::fetch_registers (struct regcache *regcache, int regnum)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ const int num_regs = gdbarch_num_regs (gdbarch);
+ int current_regnum;
+ CORE_ADDR current_address;
+ CORE_ADDR thread_descriptor_address;
+
+ /* The tid is the thread_id field, which is a pointer to the thread. */
+ thread_descriptor_address = (CORE_ADDR) inferior_ptid.tid ();
+
+ /* Read registers. */
+ for (current_regnum = 0; current_regnum < num_regs; current_regnum++)
+ {
+ int offset = register_offset (gdbarch, current_regnum);
+
+ if (offset != -1)
+ {
+ current_address = thread_descriptor_address + offset;
+ supply_register_at_address (regcache, current_regnum,
+ current_address);
+ }
+ }
+}
+
+void
+amd64_ravenscar_ops::store_registers (struct regcache *regcache, int regnum)
+{
+ struct gdbarch *gdbarch = regcache->arch ();
+ int buf_size = register_size (gdbarch, regnum);
+ gdb_byte buf[buf_size];
+ CORE_ADDR register_address;
+
+ int offset = register_offset (gdbarch, regnum);
+ if (offset != -1)
+ {
+ register_address = inferior_ptid.tid () + offset;
+
+ regcache->raw_collect (regnum, buf);
+ write_memory (register_address,
+ buf,
+ buf_size);
+ }
+}
+
+/* The ravenscar_arch_ops vector for AMD64 targets. */
+
+static struct amd64_ravenscar_ops amd64_ravenscar_ops;
+
+/* Register amd64_ravenscar_ops in GDBARCH. */
+
+void
+register_amd64_ravenscar_ops (struct gdbarch *gdbarch)
+{
+ set_gdbarch_ravenscar_ops (gdbarch, &amd64_ravenscar_ops);
+}
--- /dev/null
+/* Ravenscar x86-64 target support.
+
+ Copyright (C) 2020 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program 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 a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef AMD64_RAVENSCAR_THREAD_H
+#define AMD64_RAVENSCAR_THREAD_H
+
+struct gdbarch;
+
+extern void register_amd64_ravenscar_ops (struct gdbarch *gdbarch);
+
+#endif /* AMD64_RAVENSCAR_THREAD_H */
projects / binutils-gdb.git / commitdiff