diff options
Diffstat (limited to 'gdb/sparc64fbsd-tdep.c')
| -rw-r--r-- | gdb/sparc64fbsd-tdep.c | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/gdb/sparc64fbsd-tdep.c b/gdb/sparc64fbsd-tdep.c index 6c1e0d97833..d6c3cd64fc2 100644 --- a/gdb/sparc64fbsd-tdep.c +++ b/gdb/sparc64fbsd-tdep.c @@ -20,15 +20,25 @@ 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 "target.h" +#include "trad-frame.h" +#include "gdb_assert.h" #include "gdb_string.h" #include "sparc64-tdep.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 + /* From <machine/reg.h>. */ const struct sparc_gregset sparc64fbsd_gregset = { @@ -85,9 +95,140 @@ static struct core_fns sparc64fbsd_core_fns = }; +/* Signal trampolines. */ + +static int +sparc64fbsd_pc_in_sigtramp (CORE_ADDR pc, char *name) +{ + return (name && strcmp (name, "__sigtramp") == 0); +} + +static struct sparc_frame_cache * +sparc64fbsd_sigtramp_frame_cache (struct frame_info *next_frame, + void **this_cache) +{ + 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 areas. */ + 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 & (1 << 2)) + { + for (regnum = SPARC_F0_REGNUM, addr = mcontext_addr + 32 * 8; + regnum <= SPARC_F31_REGNUM; regnum++, addr += 4) + cache->saved_regs[regnum].addr = addr; + + for (regnum = SPARC64_F32_REGNUM; + regnum <= SPARC64_F62_REGNUM; regnum++, addr += 8) + cache->saved_regs[regnum].addr = addr; + } + + return cache; +} + +static void +sparc64fbsd_sigtramp_frame_this_id (struct frame_info *next_frame, + void **this_cache, + struct frame_id *this_id) +{ + struct sparc_frame_cache *cache = + sparc64fbsd_sigtramp_frame_cache (next_frame, this_cache); + + (*this_id) = frame_id_build (cache->base, cache->pc); +} + +static void +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) +{ + 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 const struct frame_unwind sparc64fbsd_sigtramp_frame_unwind = +{ + 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) { + set_gdbarch_pc_in_sigtramp (gdbarch, sparc64fbsd_pc_in_sigtramp); + frame_unwind_append_sniffer (gdbarch, sparc64fbsd_sigtramp_frame_sniffer); + sparc64_init_abi (info, gdbarch); } |