From: Jim Wilson <jimw@sifive.com>
To: gdb-patches@sourceware.org
Cc: Jim Wilson <jimw@sifive.com>
Subject: [PATCH 3/5] RISC-V: Add linux target support.
Date: Wed, 08 Aug 2018 18:35:00 -0000 [thread overview]
Message-ID: <20180808183443.25570-1-jimw@sifive.com> (raw)
In-Reply-To: <CAFyWVaYfdeo56PrGf7N8VLfUpMdnRekpru7vMyHS5BLKsszscA@mail.gmail.com>
Add initial target support for riscv*-linux*.
gdb/
* riscv-linux-tdep.c: New file.
---
gdb/riscv-linux-tdep.c | 94 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 94 insertions(+)
create mode 100644 gdb/riscv-linux-tdep.c
diff --git a/gdb/riscv-linux-tdep.c b/gdb/riscv-linux-tdep.c
new file mode 100644
index 0000000000..47c2ab6d4f
--- /dev/null
+++ b/gdb/riscv-linux-tdep.c
@@ -0,0 +1,94 @@
+/* Target-dependent code for GNU/Linux on RISC-V processors.
+ Copyright (C) 2018 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 "riscv-tdep.h"
+#include "osabi.h"
+#include "glibc-tdep.h"
+#include "linux-tdep.h"
+#include "solib-svr4.h"
+#include "regset.h"
+
+/* Define the general register mapping. The kernel puts the PC at offset 0,
+ gdb puts it at offset 32. Register x0 is always 0 and can be ignored.
+ Registers x1 to x31 are in the same place. */
+
+static const struct regcache_map_entry riscv_linux_gregmap[] =
+{
+ { 1, RISCV_PC_REGNUM, 0 },
+ { 31, RISCV_RA_REGNUM, 0 }, /* x1 to x31 */
+ { 0 }
+};
+
+/* Define the general register regset. */
+
+static const struct regset riscv_linux_gregset =
+{
+ riscv_linux_gregmap, regcache_supply_regset, regcache_collect_regset
+};
+
+/* Define hook for core file support. */
+
+static void
+riscv_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", (32 * riscv_isa_xlen (gdbarch)),
+ &riscv_linux_gregset, NULL, cb_data);
+
+ /* TODO: Add FP register support. */
+}
+
+/* Initialize RISC-V Linux ABI info. */
+
+static void
+riscv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ linux_init_abi (info, gdbarch);
+
+ set_gdbarch_software_single_step (gdbarch, riscv_software_single_step);
+
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ (riscv_isa_xlen (gdbarch) == 4
+ ? svr4_ilp32_fetch_link_map_offsets
+ : svr4_lp64_fetch_link_map_offsets));
+
+ /* GNU/Linux uses SVR4-style shared libraries. */
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ /* GNU/Linux uses the dynamic linker included in the GNU C Library. */
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, riscv_linux_iterate_over_regset_sections);
+}
+
+/* Initialize RISC-V Linux target support. */
+
+void
+_initialize_riscv_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_riscv, 0, GDB_OSABI_LINUX,
+ riscv_linux_init_abi);
+}
--
2.17.1
next prev parent reply other threads:[~2018-08-08 18:35 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-08 2:12 [PATCH 0/5] RISC-V Linux native port Jim Wilson
2018-08-08 2:15 ` [PATCH 1/5] RISC-V: Make riscv_isa_xlen a global function Jim Wilson
2018-08-08 12:42 ` Andrew Burgess
2018-08-08 17:55 ` Jim Wilson
2018-08-08 19:18 ` Simon Marchi
2018-08-08 2:16 ` [PATCH 2/5] RISC-V: Add software single step support Jim Wilson
2018-08-08 12:50 ` Andrew Burgess
2018-08-08 17:55 ` Jim Wilson
2018-08-08 2:16 ` [PATCH 3/5] RISC-V: Add linux target support Jim Wilson
2018-08-08 14:41 ` Andrew Burgess
2018-08-08 18:19 ` Jim Wilson
2018-08-08 18:35 ` Jim Wilson [this message]
2018-08-09 20:40 ` Jim Wilson
2018-08-08 2:17 ` [PATCH 5/5] RISC-V: Add configure support riscv*-linux* Jim Wilson
2018-08-08 16:00 ` Andrew Burgess
2018-08-08 17:30 ` Tom Tromey
2018-08-08 18:22 ` Eli Zaretskii
2018-08-08 20:49 ` Palmer Dabbelt
2018-08-08 23:26 ` Tom Tromey
2018-08-08 23:29 ` Tom Tromey
2018-08-09 2:36 ` Eli Zaretskii
2018-08-09 3:43 ` Jim Wilson
2018-08-09 4:55 ` Tom Tromey
2018-08-09 7:05 ` Andreas Schwab
2018-08-09 12:55 ` Eli Zaretskii
2018-08-09 17:25 ` Jim Wilson
2018-08-09 0:25 ` Jim Wilson
2018-08-09 0:29 ` [PATCH 5/5] RISC-V: Add configure support for riscv*-linux* Jim Wilson
2018-08-09 2:39 ` Eli Zaretskii
2018-08-09 15:57 ` Tom Tromey
2018-08-09 20:42 ` Jim Wilson
2018-08-08 2:17 ` [PATCH 4/5] RISC-V: Add native linux support Jim Wilson
2018-08-08 15:58 ` Andrew Burgess
2018-08-08 23:36 ` Jim Wilson
2018-08-08 23:39 ` Jim Wilson
2018-08-09 8:42 ` Andrew Burgess
2018-08-09 20:41 ` Jim Wilson
2018-10-25 10:49 ` Andreas Schwab
2018-10-25 11:09 ` Andrew Burgess
2018-10-25 12:06 ` Pedro Alves
2018-10-28 11:23 ` Andrew Burgess
2018-10-25 17:55 ` John Baldwin
2018-10-25 18:17 ` Jim Wilson
2018-10-25 19:19 ` John Baldwin
2018-10-27 6:07 ` Palmer Dabbelt
2018-10-29 8:50 ` Andreas Schwab
2018-10-25 16:40 ` Jim Wilson
2018-08-08 12:41 ` [PATCH 0/5] RISC-V Linux native port Andrew Burgess
2018-08-08 17:41 ` Jim Wilson
2018-08-08 18:16 ` Andrew Burgess
2018-08-08 18:42 ` Jim Wilson
2018-08-09 3:18 ` Palmer Dabbelt
2018-08-10 18:04 ` Pedro Alves
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