--- /dev/null
+/* Low level interface to ptrace, for the remote server for GDB.
+ Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
+ 2006, 2007, 2008 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 <sys/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);
+
+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 (const void *buf)
+{
+ int i;
+ CORE_ADDR addr = 0;
+ unsigned char tmp_reg_buf[8];
+ const int l0_regno = find_regno("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("sp")], sizeof(addr));
+
+ addr += BIAS;
+
+ for (i = l0_regno; i <= i7_regno; i++)
+ {
+ collect_register (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 (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 (i, ((char *) buf) + sparc_regmap[i]);
+
+ sparc_fill_gregset_to_stack (buf);
+}
+
+static void
+sparc_fill_fpregset (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 (i, ((char *) buf) + sparc_regmap[i]);
+
+}
+
+static void
+sparc_store_gregset_from_stack (const void *buf)
+{
+ int i;
+ CORE_ADDR addr = 0;
+ unsigned char tmp_reg_buf[8];
+ const int l0_regno = find_regno("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("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 (i, tmp_reg_buf);
+ addr += sizeof(tmp_reg_buf);
+ }
+}
+
+static void
+sparc_store_gregset (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 (i, ((char *) buf) + sparc_regmap[i]);
+ else
+ supply_register (i, zerobuf);
+
+ sparc_store_gregset_from_stack (buf);
+}
+
+static void
+sparc_store_fpregset (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 (i, ((char *) buf) + sparc_regmap[i]);
+}
+
+extern int debug_threads;
+
+static CORE_ADDR
+sparc_get_pc ()
+{
+ CORE_ADDR pc;
+ collect_register_by_name ("pc", &pc);
+ if (debug_threads)
+ fprintf (stderr, "stop pc is %08lx\n", pc);
+ return pc;
+}
+
+static const unsigned char sparc_breakpoint[INSN_SIZE] = { 0x91, 0xd0, 0x20, 0x01 };
+#define sparc_breakpoint_len INSN_SIZE
+
+
+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;
+}
+
+/* We only place breakpoints in empty marker functions, and thread locking
+ is outside of the function. So rather than importing software single-step,
+ we can just run until exit. */
+static CORE_ADDR
+sparc_reinsert_addr ()
+{
+ CORE_ADDR lr;
+ /* O7 is the equivalent to the 'lr' of other archs. */
+ collect_register_by_name ("o7", &lr);
+ return lr;
+}
+
+
+struct regset_info target_regsets[] = {
+ { PTRACE_GETREGS, PTRACE_SETREGS, sizeof (elf_gregset_t),
+ GENERAL_REGS,
+ sparc_fill_gregset, sparc_store_gregset },
+ { PTRACE_GETFPREGS, PTRACE_SETFPREGS, sizeof (fpregset_t),
+ FP_REGS,
+ sparc_fill_fpregset, sparc_store_fpregset },
+ { 0, 0, -1, -1, NULL, NULL }
+};
+
+struct linux_target_ops the_low_target = {
+ init_registers_sparc64,
+ sparc_num_regs,
+ /* No regmap needs to be provided since this impl. doesn't use USRREGS. */
+ NULL,
+ sparc_cannot_fetch_register,
+ sparc_cannot_store_register,
+ sparc_get_pc,
+ /* No sparc_set_pc is needed. */
+ NULL,
+ (const unsigned char *) sparc_breakpoint,
+ sparc_breakpoint_len,
+ sparc_reinsert_addr,
+ 0,
+ sparc_breakpoint_at,
+ NULL, NULL, NULL, NULL,
+ NULL, NULL
+};
+
projects / external / binutils.git / commitdiff