diff options
Diffstat (limited to 'gdb/sparc64fbsd-tdep.c')
| -rw-r--r-- | gdb/sparc64fbsd-tdep.c | 316 |
1 files changed, 152 insertions, 164 deletions
diff --git a/gdb/sparc64fbsd-tdep.c b/gdb/sparc64fbsd-tdep.c index 2b910c1b33d..3c1335df431 100644 --- a/gdb/sparc64fbsd-tdep.c +++ b/gdb/sparc64fbsd-tdep.c @@ -1,6 +1,6 @@ /* 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. @@ -20,208 +20,198 @@ 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) */ +}; + - 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 (regset->descr, 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); +} + - 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); } - 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_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; +} static void sparc64fbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { - /* Nothing yet. */ + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + tdep->gregset = XMALLOC (struct regset); + tdep->gregset->descr = &sparc64fbsd_gregset; + tdep->gregset->supply_regset = sparc64fbsd_supply_gregset; + tdep->sizeof_gregset = 256; + + tdep->fpregset = XMALLOC (struct regset); + tdep->fpregset->supply_regset = sparc64fbsd_supply_fpregset; + tdep->sizeof_fpregset = 272; + + set_gdbarch_pc_in_sigtramp (gdbarch, sparc64fbsd_pc_in_sigtramp); + frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); + + sparc64_init_abi (info, gdbarch); } /* Provide a prototype to silence -Wmissing-prototypes. */ @@ -232,6 +222,4 @@ _initialize_sparc64fbsd_tdep (void) { gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9, GDB_OSABI_FREEBSD_ELF, sparc64fbsd_init_abi); - - add_core_fns (&sparc64fbsd_core_fns); } |