aboutsummaryrefslogtreecommitdiff
path: root/gdbserver/linux-sparc-low.cc
diff options
context:
space:
mode:
authorSimon Marchi <simon.marchi@efficios.com>2020-02-13 16:27:51 -0500
committerSimon Marchi <simon.marchi@efficios.com>2020-02-13 16:27:51 -0500
commitfeacfcacaac9f7e62f467a33c4ae54c56501ed18 (patch)
tree0e083366350e9fd279bec8c7b12413c90b9f255d /gdbserver/linux-sparc-low.cc
parent06b3c5bdb018262d7c09cda9d4637015c7ebe779 (diff)
downloadgdb-feacfcacaac9f7e62f467a33c4ae54c56501ed18.zip
gdb-feacfcacaac9f7e62f467a33c4ae54c56501ed18.tar.gz
gdb-feacfcacaac9f7e62f467a33c4ae54c56501ed18.tar.bz2
gdbserver: rename source files to .cc
For the same reasons outlined in the previous patch, this patch renames gdbserver source files to .cc. I have moved the "-x c++" switch to only those rules that require it. gdbserver/ChangeLog: * Makefile.in: Rename source files from .c to .cc. * %.c: Rename to %.cc. * configure.ac: Rename server.c to server.cc. * configure: Re-generate.
Diffstat (limited to 'gdbserver/linux-sparc-low.cc')
-rw-r--r--gdbserver/linux-sparc-low.cc326
1 files changed, 326 insertions, 0 deletions
diff --git a/gdbserver/linux-sparc-low.cc b/gdbserver/linux-sparc-low.cc
new file mode 100644
index 0000000..cfa76c0
--- /dev/null
+++ b/gdbserver/linux-sparc-low.cc
@@ -0,0 +1,326 @@
+/* Low level interface to ptrace, for the remote server for GDB.
+ Copyright (C) 1995-2020 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 "server.h"
+#include "linux-low.h"
+
+#include "nat/gdb_ptrace.h"
+
+#include "gdb_proc_service.h"
+
+/* The stack pointer is offset from the stack frame by a BIAS of 2047
+ (0x7ff) for 64-bit code. BIAS is likely to be defined on SPARC
+ hosts, so undefine it first. */
+#undef BIAS
+#define BIAS 2047
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#define INSN_SIZE 4
+
+#define SPARC_R_REGS_NUM 32
+#define SPARC_F_REGS_NUM 48
+#define SPARC_CONTROL_REGS_NUM 6
+
+#define sparc_num_regs \
+ (SPARC_R_REGS_NUM + SPARC_F_REGS_NUM + SPARC_CONTROL_REGS_NUM)
+
+/* Each offset is multiplied by 8, because of the register size.
+ These offsets apply to the buffer sent/filled by ptrace.
+ Additionally, the array elements order corresponds to the .dat file, and the
+ gdb's registers enumeration order. */
+
+static int sparc_regmap[] = {
+ /* These offsets correspond to GET/SETREGSET. */
+ -1, 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, /* g0 .. g7 */
+ 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8, 14*8, /* o0 .. o5, sp, o7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* l0 .. l7 */
+ -1, -1, -1, -1, -1, -1, -1, -1, /* i0 .. i5, fp, i7 */
+
+ /* Floating point registers offsets correspond to GET/SETFPREGSET. */
+ 0*4, 1*4, 2*4, 3*4, 4*4, 5*4, 6*4, 7*4, /* f0 .. f7 */
+ 8*4, 9*4, 10*4, 11*4, 12*4, 13*4, 14*4, 15*4, /* f8 .. f15 */
+ 16*4, 17*4, 18*4, 19*4, 20*4, 21*4, 22*4, 23*4, /* f16 .. f23 */
+ 24*4, 25*4, 26*4, 27*4, 28*4, 29*4, 30*4, 31*4, /* f24 .. f31 */
+
+ /* F32 offset starts next to f31: 31*4+4 = 16 * 8. */
+ 16*8, 17*8, 18*8, 19*8, 20*8, 21*8, 22*8, 23*8, /* f32 .. f46 */
+ 24*8, 25*8, 26*8, 27*8, 28*8, 29*8, 30*8, 31*8, /* f48 .. f62 */
+
+ 17 *8, /* pc */
+ 18 *8, /* npc */
+ 16 *8, /* state */
+ /* FSR offset also corresponds to GET/SETFPREGSET, ans is placed
+ next to f62. */
+ 32 *8, /* fsr */
+ -1, /* fprs */
+ /* Y register is 32-bits length, but gdb takes care of that. */
+ 19 *8, /* y */
+
+};
+
+
+struct regs_range_t
+{
+ int regno_start;
+ int regno_end;
+};
+
+static const struct regs_range_t gregs_ranges[] = {
+ { 0, 31 }, /* g0 .. i7 */
+ { 80, 82 }, /* pc .. state */
+ { 84, 85 } /* fprs .. y */
+};
+
+#define N_GREGS_RANGES (sizeof (gregs_ranges) / sizeof (struct regs_range_t))
+
+static const struct regs_range_t fpregs_ranges[] = {
+ { 32, 79 }, /* f0 .. f62 */
+ { 83, 83 } /* fsr */
+};
+
+#define N_FPREGS_RANGES (sizeof (fpregs_ranges) / sizeof (struct regs_range_t))
+
+/* Defined in auto-generated file reg-sparc64.c. */
+void init_registers_sparc64 (void);
+extern const struct target_desc *tdesc_sparc64;
+
+static int
+sparc_cannot_store_register (int regno)
+{
+ return (regno >= sparc_num_regs || sparc_regmap[regno] == -1);
+}
+
+static int
+sparc_cannot_fetch_register (int regno)
+{
+ return (regno >= sparc_num_regs || sparc_regmap[regno] == -1);
+}
+
+static void
+sparc_fill_gregset_to_stack (struct regcache *regcache, const void *buf)
+{
+ int i;
+ CORE_ADDR addr = 0;
+ unsigned char tmp_reg_buf[8];
+ const int l0_regno = find_regno (regcache->tdesc, "l0");
+ const int i7_regno = l0_regno + 15;
+
+ /* These registers have to be stored in the stack. */
+ memcpy (&addr,
+ ((char *) buf) + sparc_regmap[find_regno (regcache->tdesc, "sp")],
+ sizeof (addr));
+
+ addr += BIAS;
+
+ for (i = l0_regno; i <= i7_regno; i++)
+ {
+ collect_register (regcache, i, tmp_reg_buf);
+ (*the_target->write_memory) (addr, tmp_reg_buf, sizeof (tmp_reg_buf));
+ addr += sizeof (tmp_reg_buf);
+ }
+}
+
+static void
+sparc_fill_gregset (struct regcache *regcache, void *buf)
+{
+ int i;
+ int range;
+
+ for (range = 0; range < N_GREGS_RANGES; range++)
+ for (i = gregs_ranges[range].regno_start;
+ i <= gregs_ranges[range].regno_end; i++)
+ if (sparc_regmap[i] != -1)
+ collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
+
+ sparc_fill_gregset_to_stack (regcache, buf);
+}
+
+static void
+sparc_fill_fpregset (struct regcache *regcache, void *buf)
+{
+ int i;
+ int range;
+
+ for (range = 0; range < N_FPREGS_RANGES; range++)
+ for (i = fpregs_ranges[range].regno_start;
+ i <= fpregs_ranges[range].regno_end; i++)
+ collect_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
+
+}
+
+static void
+sparc_store_gregset_from_stack (struct regcache *regcache, const void *buf)
+{
+ int i;
+ CORE_ADDR addr = 0;
+ unsigned char tmp_reg_buf[8];
+ const int l0_regno = find_regno (regcache->tdesc, "l0");
+ const int i7_regno = l0_regno + 15;
+
+ /* These registers have to be obtained from the stack. */
+ memcpy (&addr,
+ ((char *) buf) + sparc_regmap[find_regno (regcache->tdesc, "sp")],
+ sizeof (addr));
+
+ addr += BIAS;
+
+ for (i = l0_regno; i <= i7_regno; i++)
+ {
+ (*the_target->read_memory) (addr, tmp_reg_buf, sizeof (tmp_reg_buf));
+ supply_register (regcache, i, tmp_reg_buf);
+ addr += sizeof (tmp_reg_buf);
+ }
+}
+
+static void
+sparc_store_gregset (struct regcache *regcache, const void *buf)
+{
+ int i;
+ char zerobuf[8];
+ int range;
+
+ memset (zerobuf, 0, sizeof (zerobuf));
+
+ for (range = 0; range < N_GREGS_RANGES; range++)
+ for (i = gregs_ranges[range].regno_start;
+ i <= gregs_ranges[range].regno_end; i++)
+ if (sparc_regmap[i] != -1)
+ supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
+ else
+ supply_register (regcache, i, zerobuf);
+
+ sparc_store_gregset_from_stack (regcache, buf);
+}
+
+static void
+sparc_store_fpregset (struct regcache *regcache, const void *buf)
+{
+ int i;
+ int range;
+
+ for (range = 0; range < N_FPREGS_RANGES; range++)
+ for (i = fpregs_ranges[range].regno_start;
+ i <= fpregs_ranges[range].regno_end;
+ i++)
+ supply_register (regcache, i, ((char *) buf) + sparc_regmap[i]);
+}
+
+static const gdb_byte sparc_breakpoint[INSN_SIZE] = {
+ 0x91, 0xd0, 0x20, 0x01
+};
+#define sparc_breakpoint_len INSN_SIZE
+
+/* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */
+
+static const unsigned char *
+sparc_sw_breakpoint_from_kind (int kind, int *size)
+{
+ *size = sparc_breakpoint_len;
+ return sparc_breakpoint;
+}
+
+static int
+sparc_breakpoint_at (CORE_ADDR where)
+{
+ unsigned char insn[INSN_SIZE];
+
+ (*the_target->read_memory) (where, (unsigned char *) insn, sizeof (insn));
+
+ if (memcmp (sparc_breakpoint, insn, sizeof (insn)) == 0)
+ return 1;
+
+ /* If necessary, recognize more trap instructions here. GDB only
+ uses TRAP Always. */
+
+ return 0;
+}
+
+static void
+sparc_arch_setup (void)
+{
+ current_process ()->tdesc = tdesc_sparc64;
+}
+
+static struct regset_info sparc_regsets[] = {
+ { PTRACE_GETREGS, PTRACE_SETREGS, 0, sizeof (elf_gregset_t),
+ GENERAL_REGS,
+ sparc_fill_gregset, sparc_store_gregset },
+ { PTRACE_GETFPREGS, PTRACE_SETFPREGS, 0, sizeof (fpregset_t),
+ FP_REGS,
+ sparc_fill_fpregset, sparc_store_fpregset },
+ NULL_REGSET
+};
+
+static struct regsets_info sparc_regsets_info =
+ {
+ sparc_regsets, /* regsets */
+ 0, /* num_regsets */
+ NULL, /* disabled_regsets */
+ };
+
+static struct usrregs_info sparc_usrregs_info =
+ {
+ sparc_num_regs,
+ /* No regmap needs to be provided since this impl. doesn't use
+ USRREGS. */
+ NULL
+ };
+
+static struct regs_info regs_info =
+ {
+ NULL, /* regset_bitmap */
+ &sparc_usrregs_info,
+ &sparc_regsets_info
+ };
+
+static const struct regs_info *
+sparc_regs_info (void)
+{
+ return &regs_info;
+}
+
+struct linux_target_ops the_low_target = {
+ sparc_arch_setup,
+ sparc_regs_info,
+ sparc_cannot_fetch_register,
+ sparc_cannot_store_register,
+ NULL, /* fetch_register */
+ linux_get_pc_64bit,
+ /* No sparc_set_pc is needed. */
+ NULL,
+ NULL, /* breakpoint_kind_from_pc */
+ sparc_sw_breakpoint_from_kind,
+ NULL, /* get_next_pcs */
+ 0,
+ sparc_breakpoint_at,
+ NULL, /* supports_z_point_type */
+ NULL, NULL, NULL, NULL,
+ NULL, NULL
+};
+
+void
+initialize_low_arch (void)
+{
+ /* Initialize the Linux target descriptions. */
+ init_registers_sparc64 ();
+
+ initialize_regsets_info (&sparc_regsets_info);
+}