diff options
Diffstat (limited to 'gdb/alpha-tdep.c')
| -rw-r--r-- | gdb/alpha-tdep.c | 88 |
1 files changed, 49 insertions, 39 deletions
diff --git a/gdb/alpha-tdep.c b/gdb/alpha-tdep.c index 92a6411..d655c13 100644 --- a/gdb/alpha-tdep.c +++ b/gdb/alpha-tdep.c @@ -43,6 +43,9 @@ #include "alpha-tdep.h" #include <algorithm> +#include "target-descriptions.h" +#include "features/alpha.c" + /* Instruction decoding. The notations for registers, immediates and opcodes are the same as the one used in Compaq's Alpha architecture handbook. */ @@ -75,60 +78,38 @@ static const int subq_opcode = 0x10; static const int subq_function = 0x29; -/* Return the name of the REGNO register. +/* Alpha registers using their software names. An empty name corresponds to a register number that used to be used for a virtual register. That virtual register has been removed, but the index is still reserved to maintain compatibility with existing remote alpha targets. */ -static const char * -alpha_register_name (struct gdbarch *gdbarch, int regno) +static const char * const alpha_register_names[] = { - static const char * const register_names[] = - { - "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6", - "t7", "s0", "s1", "s2", "s3", "s4", "s5", "fp", - "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9", - "t10", "t11", "ra", "t12", "at", "gp", "sp", "zero", - "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", - "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", - "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", - "f24", "f25", "f26", "f27", "f28", "f29", "f30", "fpcr", - "pc", "", "unique" - }; - - static_assert (ALPHA_NUM_REGS == ARRAY_SIZE (register_names)); - return register_names[regno]; -} + "v0", "t0", "t1", "t2", "t3", "t4", "t5", "t6", + "t7", "s0", "s1", "s2", "s3", "s4", "s5", "fp", + "a0", "a1", "a2", "a3", "a4", "a5", "t8", "t9", + "t10", "t11", "ra", "t12", "at", "gp", "sp", "zero", + "f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", + "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", + "f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23", + "f24", "f25", "f26", "f27", "f28", "f29", "f30", "fpcr", + "pc", "", "unique" +}; +static_assert (ALPHA_NUM_REGS == ARRAY_SIZE (alpha_register_names)); static int alpha_cannot_fetch_register (struct gdbarch *gdbarch, int regno) { - return (strlen (alpha_register_name (gdbarch, regno)) == 0); + return (strlen (alpha_register_names[regno]) == 0); } static int alpha_cannot_store_register (struct gdbarch *gdbarch, int regno) { return (regno == ALPHA_ZERO_REGNUM - || strlen (alpha_register_name (gdbarch, regno)) == 0); -} - -static struct type * -alpha_register_type (struct gdbarch *gdbarch, int regno) -{ - if (regno == ALPHA_SP_REGNUM || regno == ALPHA_GP_REGNUM) - return builtin_type (gdbarch)->builtin_data_ptr; - if (regno == ALPHA_PC_REGNUM) - return builtin_type (gdbarch)->builtin_func_ptr; - - /* Don't need to worry about little vs big endian until - some jerk tries to port to alpha-unicosmk. */ - if (regno >= ALPHA_FP0_REGNUM && regno < ALPHA_FP0_REGNUM + 31) - return builtin_type (gdbarch)->builtin_double; - - return builtin_type (gdbarch)->builtin_int64; + || strlen (alpha_register_names[regno]) == 0); } /* Is REGNUM a member of REGGROUP? */ @@ -1715,11 +1696,39 @@ alpha_software_single_step (struct regcache *regcache) static struct gdbarch * alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) { + tdesc_arch_data_up tdesc_data; + const struct target_desc *tdesc = info.target_desc; + /* Find a candidate among extant architectures. */ arches = gdbarch_list_lookup_by_info (arches, &info); if (arches != NULL) return arches->gdbarch; + if (tdesc == nullptr) + tdesc = tdesc_alpha; + + /* Validate target description. */ + if (tdesc_has_registers (tdesc)) + { + const struct tdesc_feature *feature; + bool valid_p; + + feature = tdesc_find_feature (tdesc, "org.gnu.gdb.alpha.core"); + if (feature == nullptr) + return nullptr; + + tdesc_data = tdesc_data_alloc (); + valid_p = true; + for (int i = 0; i < ALPHA_NUM_REGS; ++i) + valid_p &= tdesc_numbered_register (feature, tdesc_data.get (), i, + alpha_register_names[i]); + + if (!valid_p) + return nullptr; + } + + gdb_assert (tdesc_data != nullptr); + gdbarch *gdbarch = gdbarch_alloc (&info, gdbarch_tdep_up (new alpha_gdbarch_tdep)); alpha_gdbarch_tdep *tdep = gdbarch_tdep<alpha_gdbarch_tdep> (gdbarch); @@ -1756,8 +1765,7 @@ alpha_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) set_gdbarch_pc_regnum (gdbarch, ALPHA_PC_REGNUM); set_gdbarch_fp0_regnum (gdbarch, ALPHA_FP0_REGNUM); - set_gdbarch_register_name (gdbarch, alpha_register_name); - set_gdbarch_register_type (gdbarch, alpha_register_type); + tdesc_use_registers (gdbarch, tdesc, std::move (tdesc_data)); set_gdbarch_cannot_fetch_register (gdbarch, alpha_cannot_fetch_register); set_gdbarch_cannot_store_register (gdbarch, alpha_cannot_store_register); @@ -1820,6 +1828,8 @@ INIT_GDB_FILE (alpha_tdep) gdbarch_register (bfd_arch_alpha, alpha_gdbarch_init, NULL); + initialize_tdesc_alpha (); + /* Let the user set the fence post for heuristic_proc_start. */ /* We really would like to have both "0" and "unlimited" work, but |