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-rw-r--r--gdb/sparcnbsd-tdep.c531
1 files changed, 531 insertions, 0 deletions
diff --git a/gdb/sparcnbsd-tdep.c b/gdb/sparcnbsd-tdep.c
new file mode 100644
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--- /dev/null
+++ b/gdb/sparcnbsd-tdep.c
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+/* Target-dependent code for SPARC systems running NetBSD.
+ Copyright 2002 Free Software Foundation, Inc.
+ Contributed by Wasabi Systems, 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 2 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, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "target.h"
+#include "value.h"
+#include "osabi.h"
+
+#include "sparcnbsd-tdep.h"
+#include "nbsd-tdep.h"
+
+#include "solib-svr4.h"
+
+#define REG32_OFFSET_PSR (0 * 4)
+#define REG32_OFFSET_PC (1 * 4)
+#define REG32_OFFSET_NPC (2 * 4)
+#define REG32_OFFSET_Y (3 * 4)
+#define REG32_OFFSET_GLOBAL (4 * 4)
+#define REG32_OFFSET_OUT (12 * 4)
+
+#define REG64_OFFSET_TSTATE (0 * 8)
+#define REG64_OFFSET_PC (1 * 8)
+#define REG64_OFFSET_NPC (2 * 8)
+#define REG64_OFFSET_Y (3 * 8)
+#define REG64_OFFSET_GLOBAL (4 * 8)
+#define REG64_OFFSET_OUT (12 * 8)
+
+void
+sparcnbsd_supply_reg32 (char *regs, int regno)
+{
+ int i;
+
+ if (regno == PS_REGNUM || regno == -1)
+ supply_register (PS_REGNUM, regs + REG32_OFFSET_PSR);
+
+ if (regno == PC_REGNUM || regno == -1)
+ supply_register (PC_REGNUM, regs + REG32_OFFSET_PC);
+
+ if (regno == NPC_REGNUM || regno == -1)
+ supply_register (NPC_REGNUM, regs + REG32_OFFSET_NPC);
+
+ if (regno == Y_REGNUM || regno == -1)
+ supply_register (Y_REGNUM, regs + REG32_OFFSET_Y);
+
+ if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
+ {
+ if (regno == G0_REGNUM || regno == -1)
+ supply_register (G0_REGNUM, NULL); /* %g0 is always zero */
+ for (i = G1_REGNUM; i <= G7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ supply_register (i, regs + REG32_OFFSET_GLOBAL +
+ ((i - G0_REGNUM) * 4));
+ }
+ }
+
+ if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
+ {
+ for (i = O0_REGNUM; i <= O7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ supply_register (i, regs + REG32_OFFSET_OUT +
+ ((i - O0_REGNUM) * 4));
+ }
+ }
+
+ /* Inputs and Locals are stored onto the stack by by the kernel. */
+ if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1)
+ {
+ CORE_ADDR sp = read_register (SP_REGNUM);
+ char buf[4];
+
+ for (i = L0_REGNUM; i <= I7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ {
+ target_read_memory (sp + ((i - L0_REGNUM) * 4),
+ buf, sizeof (buf));
+ supply_register (i, buf);
+ }
+ }
+ }
+
+ /* FIXME: If we don't set these valid, read_register_bytes() rereads
+ all the regs every time it is called! */
+ if (regno == WIM_REGNUM || regno == -1)
+ supply_register (WIM_REGNUM, NULL);
+ if (regno == TBR_REGNUM || regno == -1)
+ supply_register (TBR_REGNUM, NULL);
+ if (regno == CPS_REGNUM || regno == -1)
+ supply_register (CPS_REGNUM, NULL);
+}
+
+void
+sparcnbsd_supply_reg64 (char *regs, int regno)
+{
+ int i;
+ char buf[8];
+
+ if (regno == TSTATE_REGNUM || regno == -1)
+ supply_register (PS_REGNUM, regs + REG64_OFFSET_TSTATE);
+
+ if (regno == PC_REGNUM || regno == -1)
+ supply_register (PC_REGNUM, regs + REG64_OFFSET_PC);
+
+ if (regno == NPC_REGNUM || regno == -1)
+ supply_register (NPC_REGNUM, regs + REG64_OFFSET_NPC);
+
+ if (regno == Y_REGNUM || regno == -1)
+ {
+ memset (buf, 0, sizeof (buf));
+ memcpy (&buf[4], regs + REG64_OFFSET_Y, 4);
+ supply_register (Y_REGNUM, buf);
+ }
+
+ if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
+ {
+ if (regno == G0_REGNUM || regno == -1)
+ supply_register (G0_REGNUM, NULL); /* %g0 is always zero */
+ for (i = G1_REGNUM; i <= G7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ supply_register (i, regs + REG64_OFFSET_GLOBAL +
+ ((i - G0_REGNUM) * 8));
+ }
+ }
+
+ if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
+ {
+ for (i = O0_REGNUM; i <= O7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ supply_register (i, regs + REG64_OFFSET_OUT +
+ ((i - O0_REGNUM) * 8));
+ }
+ }
+
+ /* Inputs and Locals are stored onto the stack by by the kernel. */
+ if ((regno >= L0_REGNUM && regno <= I7_REGNUM) || regno == -1)
+ {
+ CORE_ADDR sp = read_register (SP_REGNUM);
+ char buf[8];
+
+ if (sp & 1)
+ {
+ /* Registers are 64-bit. */
+ sp += 2047;
+
+ for (i = L0_REGNUM; i <= I7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ {
+ target_read_memory (sp + ((i - L0_REGNUM) * 8),
+ buf, sizeof (buf));
+ supply_register (i, buf);
+ }
+ }
+ }
+ else
+ {
+ /* Registers are 32-bit. Toss any sign-extension of the stack
+ pointer, clear out the top half of the temporary buffer, and
+ put the register value in the bottom half. */
+
+ sp &= 0xffffffffUL;
+ memset (buf, 0, sizeof (buf));
+ for (i = L0_REGNUM; i <= I7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ {
+ target_read_memory (sp + ((i - L0_REGNUM) * 4),
+ &buf[4], sizeof (buf));
+ supply_register (i, buf);
+ }
+ }
+ }
+ }
+
+ /* FIXME: If we don't set these valid, read_register_bytes() rereads
+ all the regs every time it is called! */
+ if (regno == WIM_REGNUM || regno == -1)
+ supply_register (WIM_REGNUM, NULL);
+ if (regno == TBR_REGNUM || regno == -1)
+ supply_register (TBR_REGNUM, NULL);
+ if (regno == CPS_REGNUM || regno == -1)
+ supply_register (CPS_REGNUM, NULL);
+}
+
+void
+sparcnbsd_fill_reg32 (char *regs, int regno)
+{
+ int i;
+
+ if (regno == PS_REGNUM || regno == -1)
+ regcache_collect (PS_REGNUM, regs + REG32_OFFSET_PSR);
+
+ if (regno == PC_REGNUM || regno == -1)
+ regcache_collect (PC_REGNUM, regs + REG32_OFFSET_PC);
+
+ if (regno == NPC_REGNUM || regno == -1)
+ regcache_collect (NPC_REGNUM, regs + REG32_OFFSET_NPC);
+
+ if (regno == Y_REGNUM || regno == -1)
+ regcache_collect (Y_REGNUM, regs + REG32_OFFSET_Y);
+
+ if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
+ {
+ /* %g0 is always zero */
+ for (i = G1_REGNUM; i <= G7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ regcache_collect (i, regs + REG32_OFFSET_GLOBAL +
+ ((i - G0_REGNUM) * 4));
+ }
+ }
+
+ if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
+ {
+ for (i = O0_REGNUM; i <= O7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ regcache_collect (i, regs + REG32_OFFSET_OUT +
+ ((i - O0_REGNUM) * 4));
+ }
+ }
+
+ /* Responsibility for the stack regs is pushed off onto the caller. */
+}
+
+void
+sparcnbsd_fill_reg64 (char *regs, int regno)
+{
+ int i;
+
+ if (regno == TSTATE_REGNUM || regno == -1)
+ regcache_collect (TSTATE_REGNUM, regs + REG64_OFFSET_TSTATE);
+
+ if (regno == PC_REGNUM || regno == -1)
+ regcache_collect (PC_REGNUM, regs + REG64_OFFSET_PC);
+
+ if (regno == NPC_REGNUM || regno == -1)
+ regcache_collect (NPC_REGNUM, regs + REG64_OFFSET_NPC);
+
+ if (regno == Y_REGNUM || regno == -1)
+ regcache_collect (Y_REGNUM, regs + REG64_OFFSET_Y);
+
+ if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
+ {
+ /* %g0 is always zero */
+ for (i = G1_REGNUM; i <= G7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ regcache_collect (i, regs + REG64_OFFSET_GLOBAL +
+ ((i - G0_REGNUM) * 4));
+ }
+ }
+
+ if ((regno >= O0_REGNUM && regno <= O7_REGNUM) || regno == -1)
+ {
+ for (i = O0_REGNUM; i <= O7_REGNUM; i++)
+ {
+ if (regno == i || regno == -1)
+ regcache_collect (i, regs + REG64_OFFSET_OUT +
+ ((i - O0_REGNUM) * 4));
+ }
+ }
+
+ /* Responsibility for the stack regs is pushed off onto the caller. */
+}
+
+void
+sparcnbsd_supply_fpreg32 (char *fpregs, int regno)
+{
+ int i;
+
+ for (i = 0; i <= 31; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ supply_register (FP0_REGNUM + i, fpregs + (i * 4));
+ }
+
+ if (regno == FPS_REGNUM || regno == -1)
+ supply_register (FPS_REGNUM, fpregs + (32 * 4));
+}
+
+void
+sparcnbsd_supply_fpreg64 (char *fpregs, int regno)
+{
+ int i;
+
+ for (i = 0; i <= 31; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ supply_register (FP0_REGNUM + i, fpregs + (i * 4));
+ }
+
+ for (; i <= 47; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ supply_register (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8));
+ }
+
+ if (regno == FPS_REGNUM || regno == -1)
+ supply_register (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8));
+
+ /* XXX %gsr */
+}
+
+void
+sparcnbsd_fill_fpreg32 (char *fpregs, int regno)
+{
+ int i;
+
+ for (i = 0; i <= 31; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ regcache_collect (FP0_REGNUM + i, fpregs + (i * 4));
+ }
+
+ if (regno == FPS_REGNUM || regno == -1)
+ regcache_collect (FPS_REGNUM, fpregs + (32 * 4));
+}
+
+void
+sparcnbsd_fill_fpreg64 (char *fpregs, int regno)
+{
+ int i;
+
+ for (i = 0; i <= 31; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ regcache_collect (FP0_REGNUM + i, fpregs + (i * 4));
+ }
+
+ for (; i <= 47; i++)
+ {
+ if (regno == (FP0_REGNUM + i) || regno == -1)
+ regcache_collect (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8));
+ }
+
+ if (regno == FPS_REGNUM || regno == -1)
+ regcache_collect (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8));
+
+ /* XXX %gsr */
+}
+
+/* Unlike other NetBSD implementations, the SPARC port historically used
+ .reg and .reg2 (see bfd/netbsd-core.c), and as such, we can share one
+ routine for a.out and ELF core files. */
+static void
+fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
+ CORE_ADDR ignore)
+{
+ int reg_size, fpreg_size;
+
+ if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ {
+ reg_size = (20 * 4);
+ fpreg_size = (33 * 4);
+ }
+ else
+ {
+ reg_size = (20 * 8);
+ fpreg_size = (64 * 4)
+ + 8 /* fsr */
+ + 4 /* gsr */
+ + 4; /* pad */
+ }
+
+ switch (which)
+ {
+ case 0: /* Integer registers */
+ if (core_reg_size != reg_size)
+ warning ("Wrong size register set in core file.");
+ else if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ sparcnbsd_supply_reg32 (core_reg_sect, -1);
+ else
+ sparcnbsd_supply_reg64 (core_reg_sect, -1);
+ break;
+
+ case 2: /* Floating pointer registers */
+ if (core_reg_size != fpreg_size)
+ warning ("Wrong size FP register set in core file.");
+ else if (gdbarch_ptr_bit (current_gdbarch) == 32)
+ sparcnbsd_supply_fpreg32 (core_reg_sect, -1);
+ else
+ sparcnbsd_supply_fpreg64 (core_reg_sect, -1);
+ break;
+
+ default:
+ /* Don't know what kind of register request this is; just ignore it. */
+ break;
+ }
+}
+
+static struct core_fns sparcnbsd_core_fns =
+{
+ bfd_target_unknown_flavour, /* core_flavour */
+ default_check_format, /* check_format */
+ default_core_sniffer, /* core_sniffer */
+ fetch_core_registers, /* core_read_registers */
+ NULL
+};
+
+static struct core_fns sparcnbsd_elfcore_fns =
+{
+ bfd_target_elf_flavour, /* core_flavour */
+ default_check_format, /* check_format */
+ default_core_sniffer, /* core_sniffer */
+ fetch_core_registers, /* core_read_registers */
+ NULL
+};
+
+/* FIXME: Need PC_IN_SIGTRAMP() support, but NetBSD/sparc signal trampolines
+ aren't easily identified. */
+
+static int
+sparcnbsd_get_longjmp_target_32 (CORE_ADDR *pc)
+{
+ CORE_ADDR jb_addr;
+ char buf[4];
+
+ jb_addr = read_register (O0_REGNUM);
+
+ if (target_read_memory (jb_addr + 12, buf, sizeof (buf)))
+ return 0;
+
+ *pc = extract_address (buf, sizeof (buf));
+
+ return 1;
+}
+
+static int
+sparcnbsd_get_longjmp_target_64 (CORE_ADDR *pc)
+{
+ CORE_ADDR jb_addr;
+ char buf[8];
+
+ jb_addr = read_register (O0_REGNUM);
+
+ if (target_read_memory (jb_addr + 16, buf, sizeof (buf)))
+ return 0;
+
+ *pc = extract_address (buf, sizeof (buf));
+
+ return 1;
+}
+
+static int
+sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
+{
+ if (strcmp (name, "_DYNAMIC") == 0)
+ return 1;
+
+ return 0;
+}
+
+static void
+sparcnbsd_init_abi_common (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ set_gdbarch_get_longjmp_target (gdbarch, gdbarch_ptr_bit (gdbarch) == 32 ?
+ sparcnbsd_get_longjmp_target_32 :
+ sparcnbsd_get_longjmp_target_64);
+}
+
+static void
+sparcnbsd_init_abi_aout (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ sparcnbsd_init_abi_common (info, gdbarch);
+
+ set_gdbarch_in_solib_call_trampoline (gdbarch,
+ sparcnbsd_aout_in_solib_call_trampoline);
+}
+
+static void
+sparcnbsd_init_abi_elf (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ sparcnbsd_init_abi_common (info, gdbarch);
+
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ gdbarch_ptr_bit (gdbarch) == 32 ?
+ nbsd_ilp32_solib_svr4_fetch_link_map_offsets :
+ nbsd_lp64_solib_svr4_fetch_link_map_offsets);
+}
+
+static enum gdb_osabi
+sparcnbsd_aout_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "a.out-sparc-netbsd") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+void
+_initialize_sparnbsd_tdep (void)
+{
+ gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour,
+ sparcnbsd_aout_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_sparc, GDB_OSABI_NETBSD_AOUT,
+ sparcnbsd_init_abi_aout);
+ gdbarch_register_osabi (bfd_arch_sparc, GDB_OSABI_NETBSD_ELF,
+ sparcnbsd_init_abi_elf);
+
+ add_core_fns (&sparcnbsd_core_fns);
+ add_core_fns (&sparcnbsd_elfcore_fns);
+}
generated by cgit v1.1 at 2024-12-25 09:28:29 +0000