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Diffstat (limited to 'gdb/frv-tdep.c')
-rw-r--r-- | gdb/frv-tdep.c | 1173 |
1 files changed, 0 insertions, 1173 deletions
diff --git a/gdb/frv-tdep.c b/gdb/frv-tdep.c deleted file mode 100644 index 933faa1..0000000 --- a/gdb/frv-tdep.c +++ /dev/null @@ -1,1173 +0,0 @@ -/* Target-dependent code for the Fujitsu FR-V, for GDB, the GNU Debugger. - Copyright 2002 Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "inferior.h" -#include "symfile.h" /* for entry_point_address */ -#include "gdbcore.h" -#include "arch-utils.h" -#include "regcache.h" - -extern void _initialize_frv_tdep (void); - -static gdbarch_init_ftype frv_gdbarch_init; - -static gdbarch_register_name_ftype frv_register_name; -static gdbarch_register_raw_size_ftype frv_register_raw_size; -static gdbarch_register_virtual_size_ftype frv_register_virtual_size; -static gdbarch_register_virtual_type_ftype frv_register_virtual_type; -static gdbarch_register_byte_ftype frv_register_byte; -static gdbarch_breakpoint_from_pc_ftype frv_breakpoint_from_pc; -static gdbarch_frame_chain_ftype frv_frame_chain; -static gdbarch_frame_saved_pc_ftype frv_frame_saved_pc; -static gdbarch_skip_prologue_ftype frv_skip_prologue; -static gdbarch_frame_init_saved_regs_ftype frv_frame_init_saved_regs; -static gdbarch_deprecated_extract_return_value_ftype frv_extract_return_value; -static gdbarch_deprecated_extract_struct_value_address_ftype frv_extract_struct_value_address; -static gdbarch_use_struct_convention_ftype frv_use_struct_convention; -static gdbarch_frameless_function_invocation_ftype frv_frameless_function_invocation; -static gdbarch_init_extra_frame_info_ftype stupid_useless_init_extra_frame_info; -static gdbarch_store_struct_return_ftype frv_store_struct_return; -static gdbarch_push_arguments_ftype frv_push_arguments; -static gdbarch_push_return_address_ftype frv_push_return_address; -static gdbarch_pop_frame_ftype frv_pop_frame; -static gdbarch_saved_pc_after_call_ftype frv_saved_pc_after_call; - -static void frv_pop_frame_regular (struct frame_info *frame); - -/* Register numbers. You can change these as needed, but don't forget - to update the simulator accordingly. */ -enum { - /* The total number of registers we know exist. */ - frv_num_regs = 147, - - /* Register numbers 0 -- 63 are always reserved for general-purpose - registers. The chip at hand may have less. */ - first_gpr_regnum = 0, - sp_regnum = 1, - fp_regnum = 2, - struct_return_regnum = 3, - last_gpr_regnum = 63, - - /* Register numbers 64 -- 127 are always reserved for floating-point - registers. The chip at hand may have less. */ - first_fpr_regnum = 64, - last_fpr_regnum = 127, - - /* Register numbers 128 on up are always reserved for special-purpose - registers. */ - first_spr_regnum = 128, - pc_regnum = 128, - psr_regnum = 129, - ccr_regnum = 130, - cccr_regnum = 131, - tbr_regnum = 135, - brr_regnum = 136, - dbar0_regnum = 137, - dbar1_regnum = 138, - dbar2_regnum = 139, - dbar3_regnum = 140, - lr_regnum = 145, - lcr_regnum = 146, - last_spr_regnum = 146 -}; - -static LONGEST frv_call_dummy_words[] = -{0}; - - -/* The contents of this structure can only be trusted after we've - frv_frame_init_saved_regs on the frame. */ -struct frame_extra_info - { - /* The offset from our frame pointer to our caller's stack - pointer. */ - int fp_to_callers_sp_offset; - - /* Non-zero if we've saved our return address on the stack yet. - Zero if it's still sitting in the link register. */ - int lr_saved_on_stack; - }; - - -/* A structure describing a particular variant of the FRV. - We allocate and initialize one of these structures when we create - the gdbarch object for a variant. - - At the moment, all the FR variants we support differ only in which - registers are present; the portable code of GDB knows that - registers whose names are the empty string don't exist, so the - `register_names' array captures all the per-variant information we - need. - - in the future, if we need to have per-variant maps for raw size, - virtual type, etc., we should replace register_names with an array - of structures, each of which gives all the necessary info for one - register. Don't stick parallel arrays in here --- that's so - Fortran. */ -struct gdbarch_tdep -{ - /* How many general-purpose registers does this variant have? */ - int num_gprs; - - /* How many floating-point registers does this variant have? */ - int num_fprs; - - /* How many hardware watchpoints can it support? */ - int num_hw_watchpoints; - - /* How many hardware breakpoints can it support? */ - int num_hw_breakpoints; - - /* Register names. */ - char **register_names; -}; - -#define CURRENT_VARIANT (gdbarch_tdep (current_gdbarch)) - - -/* Allocate a new variant structure, and set up default values for all - the fields. */ -static struct gdbarch_tdep * -new_variant (void) -{ - struct gdbarch_tdep *var; - int r; - char buf[20]; - - var = xmalloc (sizeof (*var)); - memset (var, 0, sizeof (*var)); - - var->num_gprs = 64; - var->num_fprs = 64; - var->num_hw_watchpoints = 0; - var->num_hw_breakpoints = 0; - - /* By default, don't supply any general-purpose or floating-point - register names. */ - var->register_names = (char **) xmalloc (frv_num_regs * sizeof (char *)); - for (r = 0; r < frv_num_regs; r++) - var->register_names[r] = ""; - - /* Do, however, supply default names for the special-purpose - registers. */ - for (r = first_spr_regnum; r <= last_spr_regnum; ++r) - { - sprintf (buf, "x%d", r); - var->register_names[r] = xstrdup (buf); - } - - var->register_names[pc_regnum] = "pc"; - var->register_names[lr_regnum] = "lr"; - var->register_names[lcr_regnum] = "lcr"; - - var->register_names[psr_regnum] = "psr"; - var->register_names[ccr_regnum] = "ccr"; - var->register_names[cccr_regnum] = "cccr"; - var->register_names[tbr_regnum] = "tbr"; - - /* Debug registers. */ - var->register_names[brr_regnum] = "brr"; - var->register_names[dbar0_regnum] = "dbar0"; - var->register_names[dbar1_regnum] = "dbar1"; - var->register_names[dbar2_regnum] = "dbar2"; - var->register_names[dbar3_regnum] = "dbar3"; - - return var; -} - - -/* Indicate that the variant VAR has NUM_GPRS general-purpose - registers, and fill in the names array appropriately. */ -static void -set_variant_num_gprs (struct gdbarch_tdep *var, int num_gprs) -{ - int r; - - var->num_gprs = num_gprs; - - for (r = 0; r < num_gprs; ++r) - { - char buf[20]; - - sprintf (buf, "gr%d", r); - var->register_names[first_gpr_regnum + r] = xstrdup (buf); - } -} - - -/* Indicate that the variant VAR has NUM_FPRS floating-point - registers, and fill in the names array appropriately. */ -static void -set_variant_num_fprs (struct gdbarch_tdep *var, int num_fprs) -{ - int r; - - var->num_fprs = num_fprs; - - for (r = 0; r < num_fprs; ++r) - { - char buf[20]; - - sprintf (buf, "fr%d", r); - var->register_names[first_fpr_regnum + r] = xstrdup (buf); - } -} - - -static const char * -frv_register_name (int reg) -{ - if (reg < 0) - return "?toosmall?"; - if (reg >= frv_num_regs) - return "?toolarge?"; - - return CURRENT_VARIANT->register_names[reg]; -} - - -static int -frv_register_raw_size (int reg) -{ - return 4; -} - -static int -frv_register_virtual_size (int reg) -{ - return 4; -} - -static struct type * -frv_register_virtual_type (int reg) -{ - if (reg >= 64 && reg <= 127) - return builtin_type_float; - else - return builtin_type_int; -} - -static int -frv_register_byte (int reg) -{ - return (reg * 4); -} - -static const unsigned char * -frv_breakpoint_from_pc (CORE_ADDR *pcptr, int *lenp) -{ - static unsigned char breakpoint[] = {0xc0, 0x70, 0x00, 0x01}; - *lenp = sizeof (breakpoint); - return breakpoint; -} - -static CORE_ADDR -frv_frame_chain (struct frame_info *frame) -{ - CORE_ADDR saved_fp_addr; - - if (frame->saved_regs && frame->saved_regs[fp_regnum] != 0) - saved_fp_addr = frame->saved_regs[fp_regnum]; - else - /* Just assume it was saved in the usual place. */ - saved_fp_addr = frame->frame; - - return read_memory_integer (saved_fp_addr, 4); -} - -static CORE_ADDR -frv_frame_saved_pc (struct frame_info *frame) -{ - frv_frame_init_saved_regs (frame); - - /* Perhaps the prologue analyzer recorded where it was stored. - (As of 14 Oct 2001, it never does.) */ - if (frame->saved_regs && frame->saved_regs[pc_regnum] != 0) - return read_memory_integer (frame->saved_regs[pc_regnum], 4); - - /* If the prologue analyzer tells us the link register was saved on - the stack, get it from there. */ - if (frame->extra_info->lr_saved_on_stack) - return read_memory_integer (frame->frame + 8, 4); - - /* Otherwise, it's still in LR. - However, if FRAME isn't the youngest frame, this is kind of - suspicious --- if this frame called somebody else, then its LR - has certainly been overwritten. */ - if (! frame->next) - return read_register (lr_regnum); - - /* By default, assume it's saved in the standard place, relative to - the frame pointer. */ - return read_memory_integer (frame->frame + 8, 4); -} - - -/* Return true if REG is a caller-saves ("scratch") register, - false otherwise. */ -static int -is_caller_saves_reg (int reg) -{ - return ((4 <= reg && reg <= 7) - || (14 <= reg && reg <= 15) - || (32 <= reg && reg <= 47)); -} - - -/* Return true if REG is a callee-saves register, false otherwise. */ -static int -is_callee_saves_reg (int reg) -{ - return ((16 <= reg && reg <= 31) - || (48 <= reg && reg <= 63)); -} - - -/* Return true if REG is an argument register, false otherwise. */ -static int -is_argument_reg (int reg) -{ - return (8 <= reg && reg <= 13); -} - - -/* Scan an FR-V prologue, starting at PC, until frame->PC. - If FRAME is non-zero, fill in its saved_regs with appropriate addresses. - We assume FRAME's saved_regs array has already been allocated and cleared. - Return the first PC value after the prologue. - - Note that, for unoptimized code, we almost don't need this function - at all; all arguments and locals live on the stack, so we just need - the FP to find everything. The catch: structures passed by value - have their addresses living in registers; they're never spilled to - the stack. So if you ever want to be able to get to these - arguments in any frame but the top, you'll need to do this serious - prologue analysis. */ -static CORE_ADDR -frv_analyze_prologue (CORE_ADDR pc, struct frame_info *frame) -{ - /* When writing out instruction bitpatterns, we use the following - letters to label instruction fields: - P - The parallel bit. We don't use this. - J - The register number of GRj in the instruction description. - K - The register number of GRk in the instruction description. - I - The register number of GRi. - S - a signed imediate offset. - U - an unsigned immediate offset. - - The dots below the numbers indicate where hex digit boundaries - fall, to make it easier to check the numbers. */ - - /* Non-zero iff we've seen the instruction that initializes the - frame pointer for this function's frame. */ - int fp_set = 0; - - /* If fp_set is non_zero, then this is the distance from - the stack pointer to frame pointer: fp = sp + fp_offset. */ - int fp_offset = 0; - - /* Total size of frame prior to any alloca operations. */ - int framesize = 0; - - /* The number of the general-purpose register we saved the return - address ("link register") in, or -1 if we haven't moved it yet. */ - int lr_save_reg = -1; - - /* Non-zero iff we've saved the LR onto the stack. */ - int lr_saved_on_stack = 0; - - /* If gr_saved[i] is non-zero, then we've noticed that general - register i has been saved at gr_sp_offset[i] from the stack - pointer. */ - char gr_saved[64]; - int gr_sp_offset[64]; - - memset (gr_saved, 0, sizeof (gr_saved)); - - while (! frame || pc < frame->pc) - { - LONGEST op = read_memory_integer (pc, 4); - - /* The tests in this chain of ifs should be in order of - decreasing selectivity, so that more particular patterns get - to fire before less particular patterns. */ - - /* Setting the FP from the SP: - ori sp, 0, fp - P 000010 0100010 000001 000000000000 = 0x04881000 - 0 111111 1111111 111111 111111111111 = 0x7fffffff - . . . . . . . . - We treat this as part of the prologue. */ - if ((op & 0x7fffffff) == 0x04881000) - { - fp_set = 1; - fp_offset = 0; - } - - /* Move the link register to the scratch register grJ, before saving: - movsg lr, grJ - P 000100 0000011 010000 000111 JJJJJJ = 0x080d01c0 - 0 111111 1111111 111111 111111 000000 = 0x7fffffc0 - . . . . . . . . - We treat this as part of the prologue. */ - else if ((op & 0x7fffffc0) == 0x080d01c0) - { - int gr_j = op & 0x3f; - - /* If we're moving it to a scratch register, that's fine. */ - if (is_caller_saves_reg (gr_j)) - lr_save_reg = gr_j; - /* Otherwise it's not a prologue instruction that we - recognize. */ - else - break; - } - - /* To save multiple callee-saves registers on the stack, at - offset zero: - - std grK,@(sp,gr0) - P KKKKKK 0000011 000001 000011 000000 = 0x000c10c0 - 0 000000 1111111 111111 111111 111111 = 0x01ffffff - - stq grK,@(sp,gr0) - P KKKKKK 0000011 000001 000100 000000 = 0x000c1100 - 0 000000 1111111 111111 111111 111111 = 0x01ffffff - . . . . . . . . - We treat this as part of the prologue, and record the register's - saved address in the frame structure. */ - else if ((op & 0x01ffffff) == 0x000c10c0 - || (op & 0x01ffffff) == 0x000c1100) - { - int gr_k = ((op >> 25) & 0x3f); - int ope = ((op >> 6) & 0x3f); - int count; - int i; - - /* Is it an std or an stq? */ - if (ope == 0x03) - count = 2; - else - count = 4; - - /* Is it really a callee-saves register? */ - if (is_callee_saves_reg (gr_k)) - { - for (i = 0; i < count; i++) - { - gr_saved[gr_k + i] = 1; - gr_sp_offset[gr_k + i] = 4 * i; - } - } - else - /* It's not a prologue instruction. */ - break; - } - - /* Adjusting the stack pointer. (The stack pointer is GR1.) - addi sp, S, sp - P 000001 0010000 000001 SSSSSSSSSSSS = 0x02401000 - 0 111111 1111111 111111 000000000000 = 0x7ffff000 - . . . . . . . . - We treat this as part of the prologue. */ - else if ((op & 0x7ffff000) == 0x02401000) - { - /* Sign-extend the twelve-bit field. - (Isn't there a better way to do this?) */ - int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800; - - framesize -= s; - } - - /* Setting the FP to a constant distance from the SP: - addi sp, S, fp - P 000010 0010000 000001 SSSSSSSSSSSS = 0x04401000 - 0 111111 1111111 111111 000000000000 = 0x7ffff000 - . . . . . . . . - We treat this as part of the prologue. */ - else if ((op & 0x7ffff000) == 0x04401000) - { - /* Sign-extend the twelve-bit field. - (Isn't there a better way to do this?) */ - int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800; - fp_set = 1; - fp_offset = s; - } - - /* To spill an argument register to a scratch register: - ori GRi, 0, GRk - P KKKKKK 0100010 IIIIII 000000000000 = 0x00880000 - 0 000000 1111111 000000 111111111111 = 0x01fc0fff - . . . . . . . . - For the time being, we treat this as a prologue instruction, - assuming that GRi is an argument register. This one's kind - of suspicious, because it seems like it could be part of a - legitimate body instruction. But we only come here when the - source info wasn't helpful, so we have to do the best we can. - Hopefully once GCC and GDB agree on how to emit line number - info for prologues, then this code will never come into play. */ - else if ((op & 0x01fc0fff) == 0x00880000) - { - int gr_i = ((op >> 12) & 0x3f); - - /* If the source isn't an arg register, then this isn't a - prologue instruction. */ - if (! is_argument_reg (gr_i)) - break; - } - - /* To spill 16-bit values to the stack: - sthi GRk, @(fp, s) - P KKKKKK 1010001 000010 SSSSSSSSSSSS = 0x01442000 - 0 000000 1111111 111111 000000000000 = 0x01fff000 - . . . . . . . . - And for 8-bit values, we use STB instructions. - stbi GRk, @(fp, s) - P KKKKKK 1010000 000010 SSSSSSSSSSSS = 0x01402000 - 0 000000 1111111 111111 000000000000 = 0x01fff000 - . . . . . . . . - We check that GRk is really an argument register, and treat - all such as part of the prologue. */ - else if ( (op & 0x01fff000) == 0x01442000 - || (op & 0x01fff000) == 0x01402000) - { - int gr_k = ((op >> 25) & 0x3f); - - if (! is_argument_reg (gr_k)) - break; /* Source isn't an arg register. */ - } - - /* To save multiple callee-saves register on the stack, at a - non-zero offset: - - stdi GRk, @(sp, s) - P KKKKKK 1010011 000001 SSSSSSSSSSSS = 0x014c1000 - 0 000000 1111111 111111 000000000000 = 0x01fff000 - . . . . . . . . - stqi GRk, @(sp, s) - P KKKKKK 1010100 000001 SSSSSSSSSSSS = 0x01501000 - 0 000000 1111111 111111 000000000000 = 0x01fff000 - . . . . . . . . - We treat this as part of the prologue, and record the register's - saved address in the frame structure. */ - else if ((op & 0x01fff000) == 0x014c1000 - || (op & 0x01fff000) == 0x01501000) - { - int gr_k = ((op >> 25) & 0x3f); - int count; - int i; - - /* Is it a stdi or a stqi? */ - if ((op & 0x01fff000) == 0x014c1000) - count = 2; - else - count = 4; - - /* Is it really a callee-saves register? */ - if (is_callee_saves_reg (gr_k)) - { - /* Sign-extend the twelve-bit field. - (Isn't there a better way to do this?) */ - int s = (((op & 0xfff) - 0x800) & 0xfff) - 0x800; - - for (i = 0; i < count; i++) - { - gr_saved[gr_k + i] = 1; - gr_sp_offset[gr_k + i] = s + (4 * i); - } - } - else - /* It's not a prologue instruction. */ - break; - } - - /* Storing any kind of integer register at any constant offset - from any other register. - - st GRk, @(GRi, gr0) - P KKKKKK 0000011 IIIIII 000010 000000 = 0x000c0080 - 0 000000 1111111 000000 111111 111111 = 0x01fc0fff - . . . . . . . . - sti GRk, @(GRi, d12) - P KKKKKK 1010010 IIIIII SSSSSSSSSSSS = 0x01480000 - 0 000000 1111111 000000 000000000000 = 0x01fc0000 - . . . . . . . . - These could be almost anything, but a lot of prologue - instructions fall into this pattern, so let's decode the - instruction once, and then work at a higher level. */ - else if (((op & 0x01fc0fff) == 0x000c0080) - || ((op & 0x01fc0000) == 0x01480000)) - { - int gr_k = ((op >> 25) & 0x3f); - int gr_i = ((op >> 12) & 0x3f); - int offset; - - /* Are we storing with gr0 as an offset, or using an - immediate value? */ - if ((op & 0x01fc0fff) == 0x000c0080) - offset = 0; - else - offset = (((op & 0xfff) - 0x800) & 0xfff) - 0x800; - - /* If the address isn't relative to the SP or FP, it's not a - prologue instruction. */ - if (gr_i != sp_regnum && gr_i != fp_regnum) - break; - - /* Saving the old FP in the new frame (relative to the SP). */ - if (gr_k == fp_regnum && gr_i == sp_regnum) - ; - - /* Saving callee-saves register(s) on the stack, relative to - the SP. */ - else if (gr_i == sp_regnum - && is_callee_saves_reg (gr_k)) - { - gr_saved[gr_k] = 1; - gr_sp_offset[gr_k] = offset; - } - - /* Saving the scratch register holding the return address. */ - else if (lr_save_reg != -1 - && gr_k == lr_save_reg) - lr_saved_on_stack = 1; - - /* Spilling int-sized arguments to the stack. */ - else if (is_argument_reg (gr_k)) - ; - - /* It's not a store instruction we recognize, so this must - be the end of the prologue. */ - else - break; - } - - /* It's not any instruction we recognize, so this must be the end - of the prologue. */ - else - break; - - pc += 4; - } - - if (frame) - { - frame->extra_info->lr_saved_on_stack = lr_saved_on_stack; - - /* If we know the relationship between the stack and frame - pointers, record the addresses of the registers we noticed. - Note that we have to do this as a separate step at the end, - because instructions may save relative to the SP, but we need - their addresses relative to the FP. */ - if (fp_set) - { - int i; - - for (i = 0; i < 64; i++) - if (gr_saved[i]) - frame->saved_regs[i] = (frame->frame - - fp_offset + gr_sp_offset[i]); - - frame->extra_info->fp_to_callers_sp_offset = framesize - fp_offset; - } - } - - return pc; -} - - -static CORE_ADDR -frv_skip_prologue (CORE_ADDR pc) -{ - CORE_ADDR func_addr, func_end, new_pc; - - new_pc = pc; - - /* If the line table has entry for a line *within* the function - (i.e., not in the prologue, and not past the end), then that's - our location. */ - if (find_pc_partial_function (pc, NULL, &func_addr, &func_end)) - { - struct symtab_and_line sal; - - sal = find_pc_line (func_addr, 0); - - if (sal.line != 0 && sal.end < func_end) - { - new_pc = sal.end; - } - } - - /* The FR-V prologue is at least five instructions long (twenty bytes). - If we didn't find a real source location past that, then - do a full analysis of the prologue. */ - if (new_pc < pc + 20) - new_pc = frv_analyze_prologue (pc, 0); - - return new_pc; -} - -static void -frv_frame_init_saved_regs (struct frame_info *frame) -{ - if (frame->saved_regs) - return; - - frame_saved_regs_zalloc (frame); - frame->saved_regs[fp_regnum] = frame->frame; - - /* Find the beginning of this function, so we can analyze its - prologue. */ - { - CORE_ADDR func_addr, func_end; - - if (find_pc_partial_function (frame->pc, NULL, &func_addr, &func_end)) - frv_analyze_prologue (func_addr, frame); - } -} - -/* Should we use EXTRACT_STRUCT_VALUE_ADDRESS instead of - EXTRACT_RETURN_VALUE? GCC_P is true if compiled with gcc - and TYPE is the type (which is known to be struct, union or array). - - The frv returns all structs in memory. */ - -static int -frv_use_struct_convention (int gcc_p, struct type *type) -{ - return 1; -} - -static void -frv_extract_return_value (struct type *type, char *regbuf, char *valbuf) -{ - memcpy (valbuf, (regbuf - + frv_register_byte (8) - + (TYPE_LENGTH (type) < 4 ? 4 - TYPE_LENGTH (type) : 0)), - TYPE_LENGTH (type)); -} - -static CORE_ADDR -frv_extract_struct_value_address (char *regbuf) -{ - return extract_address (regbuf + frv_register_byte (struct_return_regnum), - 4); -} - -static void -frv_store_struct_return (CORE_ADDR addr, CORE_ADDR sp) -{ - write_register (struct_return_regnum, addr); -} - -static int -frv_frameless_function_invocation (struct frame_info *frame) -{ - return frameless_look_for_prologue (frame); -} - -static CORE_ADDR -frv_saved_pc_after_call (struct frame_info *frame) -{ - return read_register (lr_regnum); -} - -static void -frv_init_extra_frame_info (int fromleaf, struct frame_info *frame) -{ - frame->extra_info = (struct frame_extra_info *) - frame_obstack_alloc (sizeof (struct frame_extra_info)); - frame->extra_info->fp_to_callers_sp_offset = 0; - frame->extra_info->lr_saved_on_stack = 0; -} - -#define ROUND_UP(n,a) (((n)+(a)-1) & ~((a)-1)) -#define ROUND_DOWN(n,a) ((n) & ~((a)-1)) - -static CORE_ADDR -frv_push_arguments (int nargs, struct value **args, CORE_ADDR sp, - int struct_return, CORE_ADDR struct_addr) -{ - int argreg; - int argnum; - char *val; - char valbuf[4]; - struct value *arg; - struct type *arg_type; - int len; - enum type_code typecode; - CORE_ADDR regval; - int stack_space; - int stack_offset; - -#if 0 - printf("Push %d args at sp = %x, struct_return=%d (%x)\n", - nargs, (int) sp, struct_return, struct_addr); -#endif - - stack_space = 0; - for (argnum = 0; argnum < nargs; ++argnum) - stack_space += ROUND_UP (TYPE_LENGTH (VALUE_TYPE (args[argnum])), 4); - - stack_space -= (6 * 4); - if (stack_space > 0) - sp -= stack_space; - - /* Make sure stack is dword aligned. */ - sp = ROUND_DOWN (sp, 8); - - stack_offset = 0; - - argreg = 8; - - if (struct_return) - write_register (struct_return_regnum, struct_addr); - - for (argnum = 0; argnum < nargs; ++argnum) - { - arg = args[argnum]; - arg_type = check_typedef (VALUE_TYPE (arg)); - len = TYPE_LENGTH (arg_type); - typecode = TYPE_CODE (arg_type); - - if (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION) - { - store_address (valbuf, 4, VALUE_ADDRESS (arg)); - typecode = TYPE_CODE_PTR; - len = 4; - val = valbuf; - } - else - { - val = (char *) VALUE_CONTENTS (arg); - } - - while (len > 0) - { - int partial_len = (len < 4 ? len : 4); - - if (argreg < 14) - { - regval = extract_address (val, partial_len); -#if 0 - printf(" Argnum %d data %x -> reg %d\n", - argnum, (int) regval, argreg); -#endif - write_register (argreg, regval); - ++argreg; - } - else - { -#if 0 - printf(" Argnum %d data %x -> offset %d (%x)\n", - argnum, *((int *)val), stack_offset, (int) (sp + stack_offset)); -#endif - write_memory (sp + stack_offset, val, partial_len); - stack_offset += ROUND_UP(partial_len, 4); - } - len -= partial_len; - val += partial_len; - } - } - return sp; -} - -static CORE_ADDR -frv_push_return_address (CORE_ADDR pc, CORE_ADDR sp) -{ - write_register (lr_regnum, CALL_DUMMY_ADDRESS ()); - return sp; -} - -static void -frv_store_return_value (struct type *type, char *valbuf) -{ - int length = TYPE_LENGTH (type); - int reg8_offset = frv_register_byte (8); - - if (length <= 4) - write_register_bytes (reg8_offset + (4 - length), valbuf, length); - else if (length == 8) - write_register_bytes (reg8_offset, valbuf, length); - else - internal_error (__FILE__, __LINE__, - "Don't know how to return a %d-byte value.", length); -} - -static void -frv_pop_frame (void) -{ - generic_pop_current_frame (frv_pop_frame_regular); -} - -static void -frv_pop_frame_regular (struct frame_info *frame) -{ - CORE_ADDR fp; - int regno; - - fp = frame->frame; - - frv_frame_init_saved_regs (frame); - - write_register (pc_regnum, frv_frame_saved_pc (frame)); - for (regno = 0; regno < frv_num_regs; ++regno) - { - if (frame->saved_regs[regno] - && regno != pc_regnum - && regno != sp_regnum) - { - write_register (regno, - read_memory_integer (frame->saved_regs[regno], 4)); - } - } - write_register (sp_regnum, fp + frame->extra_info->fp_to_callers_sp_offset); - flush_cached_frames (); -} - - -static void -frv_remote_translate_xfer_address (CORE_ADDR memaddr, int nr_bytes, - CORE_ADDR *targ_addr, int *targ_len) -{ - *targ_addr = memaddr; - *targ_len = nr_bytes; -} - - -/* Hardware watchpoint / breakpoint support for the FR500 - and FR400. */ - -int -frv_check_watch_resources (int type, int cnt, int ot) -{ - struct gdbarch_tdep *var = CURRENT_VARIANT; - - /* Watchpoints not supported on simulator. */ - if (strcmp (target_shortname, "sim") == 0) - return 0; - - if (type == bp_hardware_breakpoint) - { - if (var->num_hw_breakpoints == 0) - return 0; - else if (cnt <= var->num_hw_breakpoints) - return 1; - } - else - { - if (var->num_hw_watchpoints == 0) - return 0; - else if (ot) - return -1; - else if (cnt <= var->num_hw_watchpoints) - return 1; - } - return -1; -} - - -CORE_ADDR -frv_stopped_data_address (void) -{ - CORE_ADDR brr, dbar0, dbar1, dbar2, dbar3; - - brr = read_register (brr_regnum); - dbar0 = read_register (dbar0_regnum); - dbar1 = read_register (dbar1_regnum); - dbar2 = read_register (dbar2_regnum); - dbar3 = read_register (dbar3_regnum); - - if (brr & (1<<11)) - return dbar0; - else if (brr & (1<<10)) - return dbar1; - else if (brr & (1<<9)) - return dbar2; - else if (brr & (1<<8)) - return dbar3; - else - return 0; -} - -static struct gdbarch * -frv_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) -{ - struct gdbarch *gdbarch; - struct gdbarch_tdep *var; - - /* Check to see if we've already built an appropriate architecture - object for this executable. */ - arches = gdbarch_list_lookup_by_info (arches, &info); - if (arches) - return arches->gdbarch; - - /* Select the right tdep structure for this variant. */ - var = new_variant (); - switch (info.bfd_arch_info->mach) - { - case bfd_mach_frv: - case bfd_mach_frvsimple: - case bfd_mach_fr500: - case bfd_mach_frvtomcat: - set_variant_num_gprs (var, 64); - set_variant_num_fprs (var, 64); - break; - - case bfd_mach_fr400: - set_variant_num_gprs (var, 32); - set_variant_num_fprs (var, 32); - break; - - default: - /* Never heard of this variant. */ - return 0; - } - - gdbarch = gdbarch_alloc (&info, var); - - set_gdbarch_short_bit (gdbarch, 16); - set_gdbarch_int_bit (gdbarch, 32); - set_gdbarch_long_bit (gdbarch, 32); - set_gdbarch_long_long_bit (gdbarch, 64); - set_gdbarch_float_bit (gdbarch, 32); - set_gdbarch_double_bit (gdbarch, 64); - set_gdbarch_long_double_bit (gdbarch, 64); - set_gdbarch_ptr_bit (gdbarch, 32); - - set_gdbarch_num_regs (gdbarch, frv_num_regs); - set_gdbarch_sp_regnum (gdbarch, sp_regnum); - set_gdbarch_fp_regnum (gdbarch, fp_regnum); - set_gdbarch_pc_regnum (gdbarch, pc_regnum); - - set_gdbarch_register_name (gdbarch, frv_register_name); - set_gdbarch_register_size (gdbarch, 4); - set_gdbarch_register_bytes (gdbarch, frv_num_regs * 4); - set_gdbarch_register_byte (gdbarch, frv_register_byte); - set_gdbarch_register_raw_size (gdbarch, frv_register_raw_size); - set_gdbarch_max_register_raw_size (gdbarch, 4); - set_gdbarch_register_virtual_size (gdbarch, frv_register_virtual_size); - set_gdbarch_max_register_virtual_size (gdbarch, 4); - set_gdbarch_register_virtual_type (gdbarch, frv_register_virtual_type); - - set_gdbarch_skip_prologue (gdbarch, frv_skip_prologue); - set_gdbarch_breakpoint_from_pc (gdbarch, frv_breakpoint_from_pc); - - set_gdbarch_frame_num_args (gdbarch, frame_num_args_unknown); - set_gdbarch_frame_args_skip (gdbarch, 0); - set_gdbarch_frameless_function_invocation (gdbarch, frv_frameless_function_invocation); - - set_gdbarch_saved_pc_after_call (gdbarch, frv_saved_pc_after_call); - - set_gdbarch_frame_chain (gdbarch, frv_frame_chain); - set_gdbarch_frame_chain_valid (gdbarch, func_frame_chain_valid); - set_gdbarch_frame_saved_pc (gdbarch, frv_frame_saved_pc); - set_gdbarch_frame_args_address (gdbarch, default_frame_address); - set_gdbarch_frame_locals_address (gdbarch, default_frame_address); - - set_gdbarch_frame_init_saved_regs (gdbarch, frv_frame_init_saved_regs); - - set_gdbarch_use_struct_convention (gdbarch, frv_use_struct_convention); - set_gdbarch_deprecated_extract_return_value (gdbarch, frv_extract_return_value); - - set_gdbarch_store_struct_return (gdbarch, frv_store_struct_return); - set_gdbarch_deprecated_store_return_value (gdbarch, frv_store_return_value); - set_gdbarch_deprecated_extract_struct_value_address (gdbarch, frv_extract_struct_value_address); - - /* Settings for calling functions in the inferior. */ - set_gdbarch_use_generic_dummy_frames (gdbarch, 1); - set_gdbarch_call_dummy_length (gdbarch, 0); - set_gdbarch_coerce_float_to_double (gdbarch, - standard_coerce_float_to_double); - set_gdbarch_push_arguments (gdbarch, frv_push_arguments); - set_gdbarch_push_return_address (gdbarch, frv_push_return_address); - set_gdbarch_pop_frame (gdbarch, frv_pop_frame); - - set_gdbarch_call_dummy_p (gdbarch, 1); - set_gdbarch_call_dummy_words (gdbarch, frv_call_dummy_words); - set_gdbarch_sizeof_call_dummy_words (gdbarch, sizeof (frv_call_dummy_words)); - set_gdbarch_call_dummy_breakpoint_offset_p (gdbarch, 1); - set_gdbarch_init_extra_frame_info (gdbarch, frv_init_extra_frame_info); - - /* Settings that should be unnecessary. */ - set_gdbarch_inner_than (gdbarch, core_addr_lessthan); - - 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_read_sp (gdbarch, generic_target_read_sp); - set_gdbarch_write_sp (gdbarch, generic_target_write_sp); - - set_gdbarch_call_dummy_location (gdbarch, AT_ENTRY_POINT); - set_gdbarch_call_dummy_address (gdbarch, entry_point_address); - set_gdbarch_call_dummy_breakpoint_offset (gdbarch, 0); - set_gdbarch_call_dummy_start_offset (gdbarch, 0); - set_gdbarch_pc_in_call_dummy (gdbarch, pc_in_call_dummy_at_entry_point); - set_gdbarch_call_dummy_stack_adjust_p (gdbarch, 0); - set_gdbarch_push_dummy_frame (gdbarch, generic_push_dummy_frame); - set_gdbarch_fix_call_dummy (gdbarch, generic_fix_call_dummy); - - set_gdbarch_get_saved_register (gdbarch, generic_unwind_get_saved_register); - - set_gdbarch_decr_pc_after_break (gdbarch, 0); - set_gdbarch_function_start_offset (gdbarch, 0); - set_gdbarch_register_convertible (gdbarch, generic_register_convertible_not); - - set_gdbarch_remote_translate_xfer_address - (gdbarch, frv_remote_translate_xfer_address); - - /* Hardware watchpoint / breakpoint support. */ - switch (info.bfd_arch_info->mach) - { - case bfd_mach_frv: - case bfd_mach_frvsimple: - case bfd_mach_fr500: - case bfd_mach_frvtomcat: - /* fr500-style hardware debugging support. */ - var->num_hw_watchpoints = 4; - var->num_hw_breakpoints = 4; - break; - - case bfd_mach_fr400: - /* fr400-style hardware debugging support. */ - var->num_hw_watchpoints = 2; - var->num_hw_breakpoints = 4; - break; - - default: - /* Otherwise, assume we don't have hardware debugging support. */ - var->num_hw_watchpoints = 0; - var->num_hw_breakpoints = 0; - break; - } - - return gdbarch; -} - -void -_initialize_frv_tdep (void) -{ - register_gdbarch_init (bfd_arch_frv, frv_gdbarch_init); - - tm_print_insn = print_insn_frv; -} - - |