-/* Target-dependent code for SPARC systems running NetBSD.
- Copyright 2002, 2003 Free Software Foundation, Inc.
+/* Target-dependent code for NetBSD/sparc.
+
+ Copyright (C) 2002, 2003, 2004, 2006, 2007 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
+ 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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "frame.h"
+#include "frame-unwind.h"
#include "gdbcore.h"
-#include "regcache.h"
-#include "target.h"
-#include "value.h"
+#include "gdbtypes.h"
#include "osabi.h"
+#include "regcache.h"
+#include "regset.h"
+#include "solib-svr4.h"
+#include "symtab.h"
+#include "trad-frame.h"
+#include "gdb_assert.h"
#include "gdb_string.h"
-#include "sparcnbsd-tdep.h"
+#include "sparc-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)
+/* Macros to extract fields from SPARC instructions. */
+#define X_RS1(i) (((i) >> 14) & 0x1f)
+#define X_RS2(i) ((i) & 0x1f)
+#define X_I(i) (((i) >> 13) & 1)
-#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)
+const struct sparc_gregset sparc32nbsd_gregset =
{
- 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));
- }
- }
+ 0 * 4, /* %psr */
+ 1 * 4, /* %pc */
+ 2 * 4, /* %npc */
+ 3 * 4, /* %y */
+ -1, /* %wim */
+ -1, /* %tbr */
+ 5 * 4, /* %g1 */
+ -1 /* %l0 */
+};
- /* 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);
- }
- }
- }
+static void
+sparc32nbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ sparc32_supply_gregset (&sparc32nbsd_gregset, regcache, regnum, gregs);
- /* 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);
+ /* Traditional NetBSD core files don't use multiple register sets.
+ Instead, the general-purpose and floating-point registers are
+ lumped together in a single section. */
+ if (len >= 212)
+ sparc32_supply_fpregset (regcache, regnum, (const char *) gregs + 80);
}
-void
-sparcnbsd_supply_reg64 (char *regs, int regno)
+static void
+sparc32nbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
{
- 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);
+ sparc32_supply_fpregset (regcache, regnum, fpregs);
+}
- if (regno == NPC_REGNUM || regno == -1)
- supply_register (NPC_REGNUM, regs + REG64_OFFSET_NPC);
+\f
+/* Signal trampolines. */
- if (regno == Y_REGNUM || regno == -1)
- {
- memset (buf, 0, sizeof (buf));
- memcpy (&buf[4], regs + REG64_OFFSET_Y, 4);
- supply_register (Y_REGNUM, buf);
- }
+/* The following variables describe the location of an on-stack signal
+ trampoline. The current values correspond to the memory layout for
+ NetBSD 1.3 and up. These shouldn't be necessary for NetBSD 2.0 and
+ up, since NetBSD uses signal trampolines provided by libc now. */
- 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));
- }
- }
+static const CORE_ADDR sparc32nbsd_sigtramp_start = 0xeffffef0;
+static const CORE_ADDR sparc32nbsd_sigtramp_end = 0xeffffff0;
- 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);
- }
- }
- }
- }
+static int
+sparc32nbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ if (pc >= sparc32nbsd_sigtramp_start && pc < sparc32nbsd_sigtramp_end)
+ return 1;
- /* 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);
+ return nbsd_pc_in_sigtramp (pc, name);
}
-void
-sparcnbsd_fill_reg32 (char *regs, int regno)
+struct trad_frame_saved_reg *
+sparc32nbsd_sigcontext_saved_regs (struct frame_info *next_frame)
{
- 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)
+ struct trad_frame_saved_reg *saved_regs;
+ CORE_ADDR addr, sigcontext_addr;
+ int regnum, delta;
+ ULONGEST psr;
+
+ saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ /* We find the appropriate instance of `struct sigcontext' at a
+ fixed offset in the signal frame. */
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ sigcontext_addr = addr + 64 + 16;
+
+ /* The registers are saved in bits and pieces scattered all over the
+ place. The code below records their location on the assumption
+ that the part of the signal trampoline that saves the state has
+ been executed. */
+
+ saved_regs[SPARC_SP_REGNUM].addr = sigcontext_addr + 8;
+ saved_regs[SPARC32_PC_REGNUM].addr = sigcontext_addr + 12;
+ saved_regs[SPARC32_NPC_REGNUM].addr = sigcontext_addr + 16;
+ saved_regs[SPARC32_PSR_REGNUM].addr = sigcontext_addr + 20;
+ saved_regs[SPARC_G1_REGNUM].addr = sigcontext_addr + 24;
+ saved_regs[SPARC_O0_REGNUM].addr = sigcontext_addr + 28;
+
+ /* The remaining `global' registers and %y are saved in the `local'
+ registers. */
+ delta = SPARC_L0_REGNUM - SPARC_G0_REGNUM;
+ for (regnum = SPARC_G2_REGNUM; regnum <= SPARC_G7_REGNUM; regnum++)
+ saved_regs[regnum].realreg = regnum + delta;
+ saved_regs[SPARC32_Y_REGNUM].realreg = SPARC_L1_REGNUM;
+
+ /* The remaining `out' registers can be found in the current frame's
+ `in' registers. */
+ delta = SPARC_I0_REGNUM - SPARC_O0_REGNUM;
+ for (regnum = SPARC_O1_REGNUM; regnum <= SPARC_O5_REGNUM; regnum++)
+ saved_regs[regnum].realreg = regnum + delta;
+ saved_regs[SPARC_O7_REGNUM].realreg = SPARC_I7_REGNUM;
+
+ /* The `local' and `in' registers have been saved in the register
+ save area. */
+ addr = saved_regs[SPARC_SP_REGNUM].addr;
+ addr = get_frame_memory_unsigned (next_frame, addr, 4);
+ for (regnum = SPARC_L0_REGNUM;
+ regnum <= SPARC_I7_REGNUM; regnum++, addr += 4)
+ saved_regs[regnum].addr = addr;
+
+ /* Handle StackGhost. */
+ {
+ ULONGEST wcookie = sparc_fetch_wcookie ();
+
+ if (wcookie != 0)
+ {
+ ULONGEST i7;
+
+ addr = saved_regs[SPARC_I7_REGNUM].addr;
+ i7 = get_frame_memory_unsigned (next_frame, addr, 4);
+ trad_frame_set_value (saved_regs, SPARC_I7_REGNUM, i7 ^ wcookie);
+ }
+ }
+
+ /* The floating-point registers are only saved if the EF bit in %prs
+ has been set. */
+
+#define PSR_EF 0x00001000
+
+ addr = saved_regs[SPARC32_PSR_REGNUM].addr;
+ psr = get_frame_memory_unsigned (next_frame, addr, 4);
+ if (psr & PSR_EF)
{
- /* %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));
- }
- }
+ CORE_ADDR sp;
- 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));
- }
+ sp = frame_unwind_register_unsigned (next_frame, SPARC_SP_REGNUM);
+ saved_regs[SPARC32_FSR_REGNUM].addr = sp + 96;
+ for (regnum = SPARC_F0_REGNUM, addr = sp + 96 + 8;
+ regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
+ saved_regs[regnum].addr = addr;
}
- /* Responsibility for the stack regs is pushed off onto the caller. */
+ return saved_regs;
}
-void
-sparcnbsd_fill_reg64 (char *regs, int regno)
+static struct sparc_frame_cache *
+sparc32nbsd_sigcontext_frame_cache (struct frame_info *next_frame,
+ void **this_cache)
{
- int i;
-
- if (regno == TSTATE_REGNUM || regno == -1)
- regcache_collect (TSTATE_REGNUM, regs + REG64_OFFSET_TSTATE);
+ struct sparc_frame_cache *cache;
+ CORE_ADDR addr;
- if (regno == PC_REGNUM || regno == -1)
- regcache_collect (PC_REGNUM, regs + REG64_OFFSET_PC);
+ if (*this_cache)
+ return *this_cache;
- if (regno == NPC_REGNUM || regno == -1)
- regcache_collect (NPC_REGNUM, regs + REG64_OFFSET_NPC);
+ cache = sparc_frame_cache (next_frame, this_cache);
+ gdb_assert (cache == *this_cache);
- if (regno == Y_REGNUM || regno == -1)
- regcache_collect (Y_REGNUM, regs + REG64_OFFSET_Y);
-
- if ((regno >= G0_REGNUM && regno <= G7_REGNUM) || regno == -1)
+ /* If we couldn't find the frame's function, we're probably dealing
+ with an on-stack signal trampoline. */
+ if (cache->pc == 0)
{
- /* %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));
- }
- }
+ cache->pc = sparc32nbsd_sigtramp_start;
- 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));
- }
+ /* Since we couldn't find the frame's function, the cache was
+ initialized under the assumption that we're frameless. */
+ cache->frameless_p = 0;
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_FP_REGNUM);
+ cache->base = addr;
}
- /* Responsibility for the stack regs is pushed off onto the caller. */
-}
+ cache->saved_regs = sparc32nbsd_sigcontext_saved_regs (next_frame);
-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));
+ return cache;
}
-void
-sparcnbsd_supply_fpreg64 (char *fpregs, int regno)
+static void
+sparc32nbsd_sigcontext_frame_this_id (struct frame_info *next_frame,
+ void **this_cache,
+ struct frame_id *this_id)
{
- int i;
+ struct sparc_frame_cache *cache =
+ sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache);
- 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 */
+ (*this_id) = frame_id_build (cache->base, cache->pc);
}
-void
-sparcnbsd_fill_fpreg32 (char *fpregs, int regno)
+static void
+sparc32nbsd_sigcontext_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp,
+ CORE_ADDR *addrp,
+ int *realnump, gdb_byte *valuep)
{
- int i;
+ struct sparc_frame_cache *cache =
+ sparc32nbsd_sigcontext_frame_cache (next_frame, this_cache);
- 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));
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
-void
-sparcnbsd_fill_fpreg64 (char *fpregs, int regno)
+static const struct frame_unwind sparc32nbsd_sigcontext_frame_unwind =
{
- int i;
+ SIGTRAMP_FRAME,
+ sparc32nbsd_sigcontext_frame_this_id,
+ sparc32nbsd_sigcontext_frame_prev_register
+};
- for (i = 0; i <= 31; i++)
- {
- if (regno == (FP0_REGNUM + i) || regno == -1)
- regcache_collect (FP0_REGNUM + i, fpregs + (i * 4));
- }
+static const struct frame_unwind *
+sparc32nbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
- for (; i <= 47; i++)
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (sparc32nbsd_pc_in_sigtramp (pc, name))
{
- if (regno == (FP0_REGNUM + i) || regno == -1)
- regcache_collect (FP0_REGNUM + i, fpregs + (32 * 4) + (i * 8));
+ if (name == NULL || strncmp (name, "__sigtramp_sigcontext", 21))
+ return &sparc32nbsd_sigcontext_frame_unwind;
}
- if (regno == FPS_REGNUM || regno == -1)
- regcache_collect (FPS_REGNUM, fpregs + (32 * 4) + (16 * 8));
-
- /* XXX %gsr */
+ return NULL;
}
+\f
+/* Return the address of a system call's alternative return
+ address. */
-/* 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)
+CORE_ADDR
+sparcnbsd_step_trap (struct frame_info *frame, unsigned long insn)
{
- int reg_size, fpreg_size;
-
- if (gdbarch_ptr_bit (current_gdbarch) == 32)
- {
- reg_size = (20 * 4);
- fpreg_size = (33 * 4);
- }
- else
+ if ((X_I (insn) == 0 && X_RS1 (insn) == 0 && X_RS2 (insn) == 0)
+ || (X_I (insn) == 1 && X_RS1 (insn) == 0 && (insn & 0x7f) == 0))
{
- reg_size = (20 * 8);
- fpreg_size = (64 * 4)
- + 8 /* fsr */
- + 4 /* gsr */
- + 4; /* pad */
- }
+ /* "New" system call. */
+ ULONGEST number = get_frame_register_unsigned (frame, SPARC_G1_REGNUM);
- 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;
+ if (number & 0x400)
+ return get_frame_register_unsigned (frame, SPARC_G2_REGNUM);
+ if (number & 0x800)
+ return get_frame_register_unsigned (frame, SPARC_G7_REGNUM);
}
-}
-
-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_unsigned_integer (buf, sizeof (buf));
-
- return 1;
+ return 0;
}
+\f
-static int
-sparcnbsd_get_longjmp_target_64 (CORE_ADDR *pc)
+static void
+sparc32nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- CORE_ADDR jb_addr;
- char buf[8];
-
- jb_addr = read_register (O0_REGNUM);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- if (target_read_memory (jb_addr + 16, buf, sizeof (buf)))
- return 0;
+ /* NetBSD doesn't support the 128-bit `long double' from the psABI. */
+ set_gdbarch_long_double_bit (gdbarch, 64);
+ set_gdbarch_long_double_format (gdbarch, floatformats_ieee_double);
- *pc = extract_unsigned_integer (buf, sizeof (buf));
+ tdep->gregset = regset_alloc (gdbarch, sparc32nbsd_supply_gregset, NULL);
+ tdep->sizeof_gregset = 20 * 4;
- return 1;
-}
+ tdep->fpregset = regset_alloc (gdbarch, sparc32nbsd_supply_fpregset, NULL);
+ tdep->sizeof_fpregset = 33 * 4;
-static int
-sparcnbsd_aout_in_solib_call_trampoline (CORE_ADDR pc, char *name)
-{
- if (strcmp (name, "_DYNAMIC") == 0)
- return 1;
+ /* Make sure we can single-step "new" syscalls. */
+ tdep->step_trap = sparcnbsd_step_trap;
- return 0;
+ frame_unwind_append_sniffer (gdbarch, sparc32nbsd_sigtramp_frame_sniffer);
}
static void
-sparcnbsd_init_abi_common (struct gdbarch_info info,
- struct gdbarch *gdbarch)
+sparc32nbsd_aout_init_abi (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);
+ sparc32nbsd_init_abi (info, gdbarch);
}
-static void
-sparcnbsd_init_abi_aout (struct gdbarch_info info,
- struct gdbarch *gdbarch)
+void
+sparc32nbsd_elf_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- sparcnbsd_init_abi_common (info, gdbarch);
+ sparc32nbsd_init_abi (info, gdbarch);
- set_gdbarch_in_solib_call_trampoline (gdbarch,
- sparcnbsd_aout_in_solib_call_trampoline);
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
-static void
-sparcnbsd_init_abi_elf (struct gdbarch_info info,
- struct gdbarch *gdbarch)
+static enum gdb_osabi
+sparcnbsd_aout_osabi_sniffer (bfd *abfd)
{
- sparcnbsd_init_abi_common (info, gdbarch);
-
- set_gdbarch_pc_in_sigtramp (gdbarch, nbsd_pc_in_sigtramp);
+ if (strcmp (bfd_get_target (abfd), "a.out-sparc-netbsd") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
- 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);
+ return GDB_OSABI_UNKNOWN;
}
+/* OpenBSD uses the traditional NetBSD core file format, even for
+ ports that use ELF. Therefore, if the default OS ABI is OpenBSD
+ ELF, we return that instead of NetBSD a.out. This is mainly for
+ the benfit of OpenBSD/sparc64, which inherits the sniffer below
+ since we include this file for an OpenBSD/sparc64 target. For
+ OpenBSD/sparc, the NetBSD a.out OS ABI is probably similar enough
+ to both the OpenBSD a.out and the OpenBSD ELF OS ABI. */
+#if defined (GDB_OSABI_DEFAULT) && (GDB_OSABI_DEFAULT == GDB_OSABI_OPENBSD_ELF)
+#define GDB_OSABI_NETBSD_CORE GDB_OSABI_OPENBSD_ELF
+#else
+#define GDB_OSABI_NETBSD_CORE GDB_OSABI_NETBSD_AOUT
+#endif
+
static enum gdb_osabi
-sparcnbsd_aout_osabi_sniffer (bfd *abfd)
+sparcnbsd_core_osabi_sniffer (bfd *abfd)
{
- if (strcmp (bfd_get_target (abfd), "a.out-sparc-netbsd") == 0)
- return GDB_OSABI_NETBSD_AOUT;
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_CORE;
return GDB_OSABI_UNKNOWN;
}
+\f
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_sparcnbsd_tdep (void);
+
void
_initialize_sparnbsd_tdep (void)
{
gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_aout_flavour,
sparcnbsd_aout_osabi_sniffer);
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_sparc, bfd_target_unknown_flavour,
+ sparcnbsd_core_osabi_sniffer);
+
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_AOUT,
- sparcnbsd_init_abi_aout);
+ sparc32nbsd_aout_init_abi);
gdbarch_register_osabi (bfd_arch_sparc, 0, GDB_OSABI_NETBSD_ELF,
- sparcnbsd_init_abi_elf);
-
- add_core_fns (&sparcnbsd_core_fns);
- add_core_fns (&sparcnbsd_elfcore_fns);
+ sparc32nbsd_elf_init_abi);
}
projects / deliverable / binutils-gdb.git / blobdiff