diff options
Diffstat (limited to 'gdb/mips-tdep.c')
| -rw-r--r-- | gdb/mips-tdep.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c index a6f689b..97076b4 100644 --- a/gdb/mips-tdep.c +++ b/gdb/mips-tdep.c @@ -35,6 +35,9 @@ #include "target.h" #include "opcode/mips.h" +#include "elf/mips.h" +#include "elf-bfd.h" + struct frame_extra_info { @@ -70,6 +73,56 @@ static enum mips_fpu_type mips_fpu_type = MIPS_DEFAULT_FPU_TYPE; #endif +/* MIPS specific per-architecture information */ +struct gdbarch_tdep + { + /* from the elf header */ + int elf_flags; + /* mips options */ + int mips_eabi; + enum mips_fpu_type mips_fpu_type; + int mips_last_arg_regnum; + int mips_last_fp_arg_regnum; + int mips_saved_regsize; + int mips_fp_register_double; + }; + +#if GDB_MULTI_ARCH +#undef MIPS_EABI +#define MIPS_EABI (gdbarch_tdep (current_gdbarch)->mips_eabi) +#endif + +#if GDB_MULTI_ARCH +#undef MIPS_LAST_FP_ARG_REGNUM +#define MIPS_LAST_FP_ARG_REGNUM (gdbarch_tdep (current_gdbarch)->mips_last_fp_arg_regnum) +#endif + +#if GDB_MULTI_ARCH +#undef MIPS_LAST_ARG_REGNUM +#define MIPS_LAST_ARG_REGNUM (gdbarch_tdep (current_gdbarch)->mips_last_arg_regnum) +#endif + +#if GDB_MULTI_ARCH +#undef MIPS_FPU_TYPE +#define MIPS_FPU_TYPE (gdbarch_tdep (current_gdbarch)->mips_fpu_type) +#endif + +#if GDB_MULTI_ARCH +#undef MIPS_SAVED_REGSIZE +#define MIPS_SAVED_REGSIZE (gdbarch_tdep (current_gdbarch)->mips_saved_regsize) +#endif + +/* Indicate that the ABI makes use of double-precision registers + provided by the FPU (rather than combining pairs of registers to + form double-precision values). Do not use "TARGET_IS_MIPS64" to + determine if the ABI is using double-precision registers. See also + MIPS_FPU_TYPE. */ +#if GDB_MULTI_ARCH +#undef FP_REGISTER_DOUBLE +#define FP_REGISTER_DOUBLE (gdbarch_tdep (current_gdbarch)->mips_fp_register_double) +#endif + + #define VM_MIN_ADDRESS (CORE_ADDR)0x400000 #if 0 @@ -3130,6 +3183,10 @@ set_mipsfpu_single_command (args, from_tty) { mips_fpu_type = MIPS_FPU_SINGLE; mips_fpu_type_auto = 0; + if (GDB_MULTI_ARCH) + { + gdbarch_tdep (current_gdbarch)->mips_fpu_type = MIPS_FPU_SINGLE; + } } static void set_mipsfpu_double_command PARAMS ((char *, int)); @@ -3140,6 +3197,10 @@ set_mipsfpu_double_command (args, from_tty) { mips_fpu_type = MIPS_FPU_DOUBLE; mips_fpu_type_auto = 0; + if (GDB_MULTI_ARCH) + { + gdbarch_tdep (current_gdbarch)->mips_fpu_type = MIPS_FPU_DOUBLE; + } } static void set_mipsfpu_none_command PARAMS ((char *, int)); @@ -3150,6 +3211,10 @@ set_mipsfpu_none_command (args, from_tty) { mips_fpu_type = MIPS_FPU_NONE; mips_fpu_type_auto = 0; + if (GDB_MULTI_ARCH) + { + gdbarch_tdep (current_gdbarch)->mips_fpu_type = MIPS_FPU_NONE; + } } static void set_mipsfpu_auto_command PARAMS ((char *, int)); @@ -3565,12 +3630,256 @@ mips_call_dummy_address () +static gdbarch_init_ftype mips_gdbarch_init; +static struct gdbarch * +mips_gdbarch_init (info, arches) + struct gdbarch_info info; + struct gdbarch_list *arches; +{ + static LONGEST mips_call_dummy_words[] = + {0}; + struct gdbarch *gdbarch; + struct gdbarch_tdep *tdep; + int elf_flags; + char *ef_mips_abi; + int ef_mips_bitptrs; + int ef_mips_arch; + + /* Extract the elf_flags if available */ + if (info.abfd != NULL + && bfd_get_flavour (info.abfd) == bfd_target_elf_flavour) + elf_flags = elf_elfheader (info.abfd)->e_flags; + else + elf_flags = 0; + + /* try to find a pre-existing architecture */ + for (arches = gdbarch_list_lookup_by_info (arches, &info); + arches != NULL; + arches = gdbarch_list_lookup_by_info (arches->next, &info)) + { + /* MIPS needs to be pedantic about which ABI the object is + using. */ + if (gdbarch_tdep (current_gdbarch)->elf_flags != elf_flags) + continue; + return arches->gdbarch; + } + + /* Need a new architecture. Fill in a target specific vector. */ + tdep = (struct gdbarch_tdep *) xmalloc (sizeof (struct gdbarch_tdep)); + gdbarch = gdbarch_alloc (&info, tdep); + tdep->elf_flags = elf_flags; + + /* Initially set everything according to the ABI. */ + set_gdbarch_short_bit (gdbarch, 16); + set_gdbarch_int_bit (gdbarch, 32); + set_gdbarch_float_bit (gdbarch, 32); + set_gdbarch_double_bit (gdbarch, 64); + set_gdbarch_long_double_bit (gdbarch, 64); + switch ((elf_flags & EF_MIPS_ABI)) + { + case E_MIPS_ABI_O32: + ef_mips_abi = "o32"; + tdep->mips_eabi = 0; + tdep->mips_saved_regsize = 4; + tdep->mips_fp_register_double = 0; + set_gdbarch_long_bit (gdbarch, 32); + set_gdbarch_ptr_bit (gdbarch, 32); + set_gdbarch_long_long_bit (gdbarch, 64); + break; + case E_MIPS_ABI_O64: + ef_mips_abi = "o64"; + tdep->mips_eabi = 0; + tdep->mips_saved_regsize = 8; + tdep->mips_fp_register_double = 1; + set_gdbarch_long_bit (gdbarch, 32); + set_gdbarch_ptr_bit (gdbarch, 32); + set_gdbarch_long_long_bit (gdbarch, 64); + break; + case E_MIPS_ABI_EABI32: + ef_mips_abi = "eabi32"; + tdep->mips_eabi = 1; + tdep->mips_saved_regsize = 4; + tdep->mips_fp_register_double = 0; + set_gdbarch_long_bit (gdbarch, 32); + set_gdbarch_ptr_bit (gdbarch, 32); + set_gdbarch_long_long_bit (gdbarch, 64); + break; + case E_MIPS_ABI_EABI64: + ef_mips_abi = "eabi64"; + tdep->mips_eabi = 1; + tdep->mips_saved_regsize = 8; + tdep->mips_fp_register_double = 1; + set_gdbarch_long_bit (gdbarch, 64); + set_gdbarch_ptr_bit (gdbarch, 64); + set_gdbarch_long_long_bit (gdbarch, 64); + break; + default: + ef_mips_abi = "default"; + tdep->mips_eabi = 0; + tdep->mips_saved_regsize = MIPS_REGSIZE; + tdep->mips_fp_register_double = (REGISTER_VIRTUAL_SIZE (FP0_REGNUM) == 8); + set_gdbarch_long_bit (gdbarch, 32); + set_gdbarch_ptr_bit (gdbarch, 32); + set_gdbarch_long_long_bit (gdbarch, 64); + break; + } + + /* determine the ISA */ + switch (elf_flags & EF_MIPS_ARCH) + { + case E_MIPS_ARCH_1: + ef_mips_arch = 1; + break; + case E_MIPS_ARCH_2: + ef_mips_arch = 2; + break; + case E_MIPS_ARCH_3: + ef_mips_arch = 3; + break; + case E_MIPS_ARCH_4: + ef_mips_arch = 0; + break; + default: + break; + } + +#if 0 + /* determine the size of a pointer */ + if ((elf_flags & EF_MIPS_32BITPTRS)) + { + ef_mips_bitptrs = 32; + } + else if ((elf_flags & EF_MIPS_64BITPTRS)) + { + ef_mips_bitptrs = 64; + } + else + { + ef_mips_bitptrs = 0; + } +#endif + + /* Select either of the two alternative ABI's */ + if (tdep->mips_eabi) + { + /* EABI uses R4 through R11 for args */ + tdep->mips_last_arg_regnum = 11; + /* EABI uses F12 through F19 for args */ + tdep->mips_last_fp_arg_regnum = FP0_REGNUM + 19; + } + else + { + /* old ABI uses R4 through R7 for args */ + tdep->mips_last_arg_regnum = 7; + /* old ABI uses F12 through F15 for args */ + tdep->mips_last_fp_arg_regnum = FP0_REGNUM + 15; + } + + /* enable/disable the MIPS FPU */ + if (!mips_fpu_type_auto) + tdep->mips_fpu_type = mips_fpu_type; + else if (info.bfd_arch_info != NULL + && info.bfd_arch_info->arch == bfd_arch_mips) + switch (info.bfd_arch_info->mach) + { + case bfd_mach_mips4100: + tdep->mips_fpu_type = MIPS_FPU_NONE; + break; + default: + tdep->mips_fpu_type = MIPS_FPU_DOUBLE; + break; + } + else + tdep->mips_fpu_type = MIPS_FPU_DOUBLE; + + /* MIPS version of register names. NOTE: At present the MIPS + register name management is part way between the old - + #undef/#define REGISTER_NAMES and the new REGISTER_NAME(nr). + Further work on it is required. */ + set_gdbarch_register_name (gdbarch, mips_register_name); + set_gdbarch_read_pc (gdbarch, generic_target_read_pc); + set_gdbarch_write_pc (gdbarch, generic_target_write_pc); + set_gdbarch_read_fp (gdbarch, generic_target_read_fp); + set_gdbarch_write_fp (gdbarch, generic_target_write_fp); + set_gdbarch_read_sp (gdbarch, generic_target_read_sp); + set_gdbarch_write_sp (gdbarch, generic_target_write_sp); + + /* Initialize a frame */ + set_gdbarch_init_extra_frame_info (gdbarch, mips_init_extra_frame_info); + + /* MIPS version of CALL_DUMMY */ + + set_gdbarch_call_dummy_p (gdbarch, 1); + set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); + set_gdbarch_use_generic_dummy_frames (gdbarch, 0); + set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); + set_gdbarch_call_dummy_address (gdbarch, mips_call_dummy_address); + set_gdbarch_call_dummy_start_offset (gdbarch, 0); + set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); + set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); + set_gdbarch_call_dummy_length (gdbarch, 0); + set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point); + set_gdbarch_call_dummy_words (gdbarch, mips_call_dummy_words); + set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (mips_call_dummy_words)); + set_gdbarch_push_return_address (gdbarch, mips_push_return_address); + set_gdbarch_push_arguments (gdbarch, mips_push_arguments); + set_gdbarch_register_convertible (gdbarch, generic_register_convertible_not); + + set_gdbarch_frame_chain_valid (gdbarch, default_frame_chain_valid); + set_gdbarch_get_saved_register (gdbarch, default_get_saved_register); + + if (gdbarch_debug) + { + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: (info)elf_flags = 0x%x\n", + elf_flags); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: (info)ef_mips_abi = %s\n", + ef_mips_abi); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: (info)ef_mips_arch = %d\n", + ef_mips_arch); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: (info)ef_mips_bitptrs = %d\n", + ef_mips_bitptrs); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: MIPS_EABI = %d\n", + tdep->mips_eabi); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: MIPS_LAST_ARG_REGNUM = %d\n", + tdep->mips_last_arg_regnum); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: MIPS_LAST_FP_ARG_REGNUM = %d (%d)\n", + tdep->mips_last_fp_arg_regnum, + tdep->mips_last_fp_arg_regnum - FP0_REGNUM); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: tdep->mips_fpu_type = %d (%s)\n", + tdep->mips_fpu_type, + (tdep->mips_fpu_type == MIPS_FPU_NONE ? "none" + : tdep->mips_fpu_type == MIPS_FPU_SINGLE ? "single" + : tdep->mips_fpu_type == MIPS_FPU_DOUBLE ? "double" + : "???")); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: tdep->mips_saved_regsize = %d\n", + tdep->mips_saved_regsize); + fprintf_unfiltered (gdb_stderr, + "mips_gdbarch_init: tdep->mips_fp_register_double = %d (%s)\n", + tdep->mips_fp_register_double, + (tdep->mips_fp_register_double ? "true" : "false")); + } + + return gdbarch; +} + + void _initialize_mips_tdep () { static struct cmd_list_element *mipsfpulist = NULL; struct cmd_list_element *c; + if (GDB_MULTI_ARCH) + register_gdbarch_init (bfd_arch_mips, mips_gdbarch_init); if (!tm_print_insn) /* Someone may have already set it */ tm_print_insn = gdb_print_insn_mips; @@ -3602,6 +3911,7 @@ _initialize_mips_tdep () "Show current use of MIPS floating-point coprocessor target.", &showlist); +#if !GDB_MULTI_ARCH c = add_set_cmd ("processor", class_support, var_string_noescape, (char *) &tmp_mips_processor_type, "Set the type of MIPS processor in use.\n\ @@ -3614,6 +3924,7 @@ Set this to be able to access processor-type-specific registers.\n\ tmp_mips_processor_type = strsave (DEFAULT_MIPS_TYPE); mips_set_processor_type_command (strsave (DEFAULT_MIPS_TYPE), 0); +#endif /* We really would like to have both "0" and "unlimited" work, but command.c doesn't deal with that. So make it a var_zinteger |