/* Target-dependent code for FreeBSD/sparc64.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright 2003, 2004 Free Software Foundation, Inc.
This file is part of GDB.
Boston, MA 02111-1307, USA. */
#include "defs.h"
+#include "frame.h"
+#include "frame-unwind.h"
#include "gdbcore.h"
#include "osabi.h"
#include "regcache.h"
+#include "regset.h"
#include "target.h"
+#include "trad-frame.h"
+#include "gdb_assert.h"
#include "gdb_string.h"
#include "sparc64-tdep.h"
/* From <machine/reg.h>. */
-
-/* Offset of registers in `struct reg'. */
-int sparc64fbsd_r_global_offset = (0 * 8);
-int sparc64fbsd_r_out_offset = (8 * 8);
-int sparc64fbsd_r_fprs_offset = (16 * 8);
-int sparc64fbsd_r_tnpc_offset = (24 * 8);
-int sparc64fbsd_r_tpc_offset = (25 * 8);
-int sparc64fbsd_r_tstate_offset = (26 * 8);
-int sparc64fbsd_r_y_offset = (28 * 8);
-
-/* Size of `struct reg' and `struct fpreg'. */
-int sparc64fbsd_sizeof_struct_reg = 256;
-int sparc64fbsd_sizeof_struct_fpreg = 272;
-
-void
-sparc64fbsd_supply_reg (const char *regs, int regnum)
+const struct sparc_gregset sparc64fbsd_gregset =
{
- char buf[8];
- int i;
-
- if (regnum == SPARC64_PC_REGNUM || regnum == -1)
- supply_register (SPARC64_PC_REGNUM, regs + sparc64fbsd_r_tpc_offset);
-
- if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
- supply_register (SPARC64_NPC_REGNUM, regs + sparc64fbsd_r_tnpc_offset);
-
- if (regnum == SPARC64_STATE_REGNUM || regnum == -1)
- supply_register (SPARC64_STATE_REGNUM, regs + sparc64fbsd_r_tstate_offset);
-
- if (regnum == SPARC64_FPRS_REGNUM || regnum == -1)
- supply_register (SPARC64_FPRS_REGNUM, regs + sparc64fbsd_r_fprs_offset);
-
- if (regnum == SPARC64_Y_REGNUM || regnum == -1)
- supply_register (SPARC64_Y_REGNUM, regs + sparc64fbsd_r_y_offset);
-
- if ((regnum >= SPARC_G0_REGNUM && regnum <= SPARC_G7_REGNUM) || regnum == -1)
- {
- if (regnum == SPARC_G0_REGNUM || regnum == -1)
- supply_register (SPARC_G0_REGNUM, NULL); /* %g0 is always zero. */
- for (i = SPARC_G1_REGNUM; i <= SPARC_G7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- supply_register (i, (regs + sparc64fbsd_r_global_offset
- + ((i - SPARC_G0_REGNUM) * 8)));
- }
- }
-
- if ((regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1)
- {
- for (i = SPARC_O0_REGNUM; i <= SPARC_O7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- supply_register (i, (regs + sparc64fbsd_r_out_offset
- + ((i - SPARC_O0_REGNUM) * 8)));
- }
- }
-
- /* Inputs and Locals are stored onto the stack by by the kernel. */
- if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1)
- {
- ULONGEST sp;
+ 26 * 8, /* "tstate" */
+ 25 * 8, /* %pc */
+ 24 * 8, /* %npc */
+ 28 * 8, /* %y */
+ 16 * 8, /* %fprs */
+ -1,
+ 1 * 8, /* %g1 */
+ -1, /* %l0 */
+ 8 /* sizeof (%y) */
+};
+\f
- regcache_cooked_read_unsigned (current_regcache, SPARC_SP_REGNUM, &sp);
- sparc_supply_rwindow (sp, regnum);
- }
+static void
+sparc64fbsd_supply_gregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ sparc64_supply_gregset (&sparc64fbsd_gregset, regcache, regnum, gregs);
}
-void
-sparc64fbsd_fill_reg (char *regs, int regnum)
+static void
+sparc64fbsd_supply_fpregset (const struct regset *regset,
+ struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
{
- char buf[8];
- int i;
-
- if (regnum == SPARC64_PC_REGNUM || regnum == -1)
- regcache_collect (SPARC64_PC_REGNUM, regs + sparc64fbsd_r_tpc_offset);
-
- if (regnum == SPARC64_NPC_REGNUM || regnum == -1)
- regcache_collect (SPARC64_NPC_REGNUM, regs + sparc64fbsd_r_tnpc_offset);
-
- if (regnum == SPARC64_FPRS_REGNUM || regnum == -1)
- regcache_collect (SPARC64_FPRS_REGNUM, regs + sparc64fbsd_r_fprs_offset);
-
- if (regnum == SPARC64_Y_REGNUM || regnum == -1)
- regcache_collect (SPARC64_Y_REGNUM, regs + sparc64fbsd_r_y_offset);
-
- if ((regnum >= SPARC_G0_REGNUM && regnum <= SPARC_G7_REGNUM) || regnum == -1)
- {
- /* %g0 is always zero. */
- for (i = SPARC_G1_REGNUM; i <= SPARC_G7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache_collect (i, (regs + sparc64fbsd_r_global_offset
- + ((i - SPARC_G0_REGNUM) * 8)));
- }
- }
+ sparc64_supply_fpregset (regcache, regnum, fpregs);
+}
+\f
- if ((regnum >= SPARC_O0_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1)
- {
- for (i = SPARC_O0_REGNUM; i <= SPARC_O7_REGNUM; i++)
- {
- if (regnum == i || regnum == -1)
- regcache_collect (i, (regs + sparc64fbsd_r_out_offset
- + ((i - SPARC_O0_REGNUM) * 8)));
- }
- }
+/* Signal trampolines. */
- /* Responsibility for the stack regs is pushed off onto the caller. */
+static int
+sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name)
+{
+ return (name && strcmp (name, "__sigtramp") == 0);
}
-void
-sparc64fbsd_supply_fpreg (const char *fpregs, int regnum)
+static struct sparc_frame_cache *
+sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame,
+ void **this_cache)
{
- int i;
-
- for (i = 0; i < 32; i++)
+ struct sparc_frame_cache *cache;
+ CORE_ADDR addr, mcontext_addr, sp;
+ LONGEST fprs;
+ int regnum;
+
+ if (*this_cache)
+ return *this_cache;
+
+ cache = sparc_frame_cache (next_frame, this_cache);
+ gdb_assert (cache == *this_cache);
+
+ cache->saved_regs = trad_frame_alloc_saved_regs (next_frame);
+
+ /* The third argument is a pointer to an instance of `ucontext_t',
+ which has a member `uc_mcontext' that contains the saved
+ registers. */
+ addr = frame_unwind_register_unsigned (next_frame, SPARC_O2_REGNUM);
+ mcontext_addr = addr + 64;
+
+ /* The following registers travel in the `mc_local' slots of
+ `mcontext_t'. */
+ addr = mcontext_addr + 16 * 8;
+ cache->saved_regs[SPARC64_FPRS_REGNUM].addr = addr + 0 * 8;
+ cache->saved_regs[SPARC64_FSR_REGNUM].addr = addr + 1 * 8;
+
+ /* The following registers travel in the `mc_in' slots of
+ `mcontext_t'. */
+ addr = mcontext_addr + 24 * 8;
+ cache->saved_regs[SPARC64_NPC_REGNUM].addr = addr + 0 * 8;
+ cache->saved_regs[SPARC64_PC_REGNUM].addr = addr + 1 * 8;
+ cache->saved_regs[SPARC64_STATE_REGNUM].addr = addr + 2 * 8;
+ cache->saved_regs[SPARC64_Y_REGNUM].addr = addr + 4 * 8;
+
+ /* The `global' and `out' registers travel in the `mc_global' and
+ `mc_out' slots of `mcontext_t', except for %g0. Since %g0 is
+ always zero, keep the identity encoding. */
+ for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 8;
+ regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
+ cache->saved_regs[regnum].addr = addr;
+
+ /* The `local' and `in' registers have been saved in the register
+ save area. */
+ addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
+ sp = get_frame_memory_unsigned (next_frame, addr, 8);
+ for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
+ regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
+ cache->saved_regs[regnum].addr = addr;
+
+ /* The floating-point registers are only saved if the FEF bit in
+ %fprs has been set. */
+
+#define FPRS_FEF (1 << 2)
+
+ addr = cache->saved_regs[SPARC64_FPRS_REGNUM].addr;
+ fprs = get_frame_memory_unsigned (next_frame, addr, 8);
+ if (fprs & FPRS_FEF)
{
- if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1)
- supply_register (SPARC_F0_REGNUM + i, fpregs + (i * 4));
- }
+ for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8;
+ regnum <= SPARC_F31_REGNUM; regnum++, addr += 4)
+ cache->saved_regs[regnum].addr = addr;
- for (i = 0; i < 16; i++)
- {
- if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1)
- supply_register (SPARC64_F32_REGNUM + i, fpregs + (32 * 4) + (i * 8));
+ for (regnum = SPARC64_F32_REGNUM;
+ regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8)
+ cache->saved_regs[regnum].addr = addr;
}
- if (regnum == SPARC64_FSR_REGNUM || regnum == -1)
- supply_register (SPARC64_FSR_REGNUM, fpregs + (32 * 4) + (16 * 8));
+ return cache;
}
-void
-sparc64fbsd_fill_fpreg (char *fpregs, int regnum)
+static void
+sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame,
+ void **this_cache,
+ struct frame_id *this_id)
{
- int i;
-
- for (i = 0; i < 32; i++)
- {
- if (regnum == (SPARC_F0_REGNUM + i) || regnum == -1)
- regcache_collect (SPARC_F0_REGNUM + i, fpregs + (i * 4));
- }
+ struct sparc_frame_cache *cache =
+ sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache);
- for (i = 0; i < 16; i++)
- {
- if (regnum == (SPARC64_F32_REGNUM + i) || regnum == -1)
- regcache_collect (SPARC64_F32_REGNUM + i, fpregs + (32 * 4) + (i * 8));
- }
-
- if (regnum == SPARC64_FSR_REGNUM || regnum == -1)
- regcache_collect (SPARC64_FSR_REGNUM, fpregs + (32 * 4) + (16 * 8));
+ (*this_id) = frame_id_build (cache->base, cache->pc);
}
-\f
static void
-fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
- CORE_ADDR ignore)
+sparc64fbsd_sigtramp_frame_prev_register (struct frame_info *next_frame,
+ void **this_cache,
+ int regnum, int *optimizedp,
+ enum lval_type *lvalp,
+ CORE_ADDR *addrp,
+ int *realnump, void *valuep)
{
- switch (which)
- {
- case 0: /* Integer registers */
- if (core_reg_size != sparc64fbsd_sizeof_struct_reg)
- warning ("Wrong size register set in core file.");
- else
- sparc64fbsd_supply_reg (core_reg_sect, -1);
- break;
-
- case 2: /* Floating pointer registers */
- if (core_reg_size != sparc64fbsd_sizeof_struct_fpreg)
- warning ("Wrong size FP register set in core file.");
- else
- sparc64fbsd_supply_fpreg (core_reg_sect, -1);
- break;
-
- default:
- /* Don't know what kind of register request this is; just ignore it. */
- break;
- }
+ struct sparc_frame_cache *cache =
+ sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache);
+
+ trad_frame_get_prev_register (next_frame, cache->saved_regs, regnum,
+ optimizedp, lvalp, addrp, realnump, valuep);
}
-static struct core_fns sparc64fbsd_core_fns =
+static const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind =
{
- bfd_target_elf_flavour, /* core_flavour */
- default_check_format, /* check_format */
- default_core_sniffer, /* core_sniffer */
- fetch_core_registers, /* core_read_registers */
- NULL
+ SIGTRAMP_FRAME,
+ sparc64fbsd_sigtramp_frame_this_id,
+ sparc64fbsd_sigtramp_frame_prev_register
};
+
+static const struct frame_unwind *
+sparc64fbsd_sigtramp_frame_sniffer (struct frame_info *next_frame)
+{
+ CORE_ADDR pc = frame_pc_unwind (next_frame);
+ char *name;
+
+ find_pc_partial_function (pc, &name, NULL, NULL);
+ if (sparc64fbsd_pc_in_sigtramp (pc, name))
+ return &sparc64fbsd_sigtramp_frame_unwind;
+
+ return NULL;
+}
\f
static void
sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- /* Nothing yet. */
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->gregset = regset_alloc (gdbarch, sparc64fbsd_supply_gregset, NULL);
+ tdep->sizeof_gregset = 256;
+
+ tdep->fpregset = regset_alloc (gdbarch, sparc64fbsd_supply_fpregset, NULL);
+ tdep->sizeof_fpregset = 272;
+
+ frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer);
+
+ sparc64_init_abi (info, gdbarch);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
{
gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi);
-
- add_core_fns (&sparc64fbsd_core_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff