/* Target-dependent code for FT32.
- Copyright (C) 2009-2017 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
This file is part of GDB.
}
}
+/* Fetch a single 32-bit instruction from address a. If memory contains
+ a compressed instruction pair, return the expanded instruction. */
+
+static ULONGEST
+ft32_fetch_instruction (CORE_ADDR a, int *isize,
+ enum bfd_endian byte_order)
+{
+ unsigned int sc[2];
+ ULONGEST inst;
+
+ CORE_ADDR a4 = a & ~3;
+ inst = read_code_unsigned_integer (a4, 4, byte_order);
+ *isize = ft32_decode_shortcode (a4, inst, sc) ? 2 : 4;
+ if (*isize == 2)
+ return sc[1 & (a >> 1)];
+ else
+ return inst;
+}
+
/* Decode the instructions within the given address range. Decide
when we must have reached the end of the function prologue. If a
frame_info pointer is provided, fill in its saved_regs etc.
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
CORE_ADDR next_addr;
ULONGEST inst;
+ int isize = 0;
int regnum, pushreg;
struct bound_minimal_symbol msymbol;
const int first_saved_reg = 13; /* The first saved register. */
return end_addr;
cache->established = 0;
- for (next_addr = start_addr; next_addr < end_addr;)
+ for (next_addr = start_addr; next_addr < end_addr; next_addr += isize)
{
- inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
+ inst = ft32_fetch_instruction (next_addr, &isize, byte_order);
if (FT32_IS_PUSH (inst))
{
pushreg = FT32_PUSH_REG (inst);
cache->framesize += 4;
cache->saved_regs[FT32_R0_REGNUM + pushreg] = cache->framesize;
- next_addr += 4;
}
else if (FT32_IS_CALL (inst))
{
cache->saved_regs[FT32_R0_REGNUM + pushreg] =
cache->framesize;
}
- next_addr += 4;
}
}
break;
/* It is a LINK? */
if (next_addr < end_addr)
{
- inst = read_memory_unsigned_integer (next_addr, 4, byte_order);
+ inst = ft32_fetch_instruction (next_addr, &isize, byte_order);
if (FT32_IS_LINK (inst))
{
cache->established = 1;
cache->saved_regs[FT32_PC_REGNUM] = cache->framesize + 4;
cache->saved_regs[FT32_FP_REGNUM] = 0;
cache->framesize += FT32_LINK_SIZE (inst);
- next_addr += 4;
+ next_addr += isize;
}
}
/* Found a function. */
sym = lookup_symbol (func_name, NULL, VAR_DOMAIN, NULL).symbol;
/* Don't use line number debug info for assembly source files. */
- if ((sym != NULL) && SYMBOL_LANGUAGE (sym) != language_asm)
+ if ((sym != NULL) && sym->language () != language_asm)
{
sal = find_pc_line (func_addr, 0);
if (sal.end && sal.end < func_end)
return 0;
}
-
-/* Implement the "read_pc" gdbarch method. */
-
-static CORE_ADDR
-ft32_read_pc (struct regcache *regcache)
-{
- ULONGEST pc;
-
- regcache_cooked_read_unsigned (regcache, FT32_PC_REGNUM, &pc);
- return pc;
-}
-
-/* Implement the "write_pc" gdbarch method. */
-
-static void
-ft32_write_pc (struct regcache *regcache, CORE_ADDR val)
-{
- regcache_cooked_write_unsigned (regcache, FT32_PC_REGNUM, val);
-}
-
-/* Implement the "unwind_sp" gdbarch method. */
-
-static CORE_ADDR
-ft32_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- return frame_unwind_register_unsigned (next_frame, FT32_SP_REGNUM);
-}
-
/* Given a return value in `regbuf' with a type `valtype',
extract and copy its value into `valbuf'. */
return cache;
}
-/* Implement the "unwind_pc" gdbarch method. */
-
-static CORE_ADDR
-ft32_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame)
-{
- return frame_unwind_register_unsigned (next_frame, FT32_PC_REGNUM);
-}
-
/* Given a GDB frame, determine the address of the calling function's
frame. This will be used to create a new GDB frame struct. */
ft32_frame_base_address
};
-static struct frame_id
-ft32_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame)
-{
- CORE_ADDR sp = get_frame_register_unsigned (this_frame, FT32_SP_REGNUM);
-
- return frame_id_build (sp, get_frame_pc (this_frame));
-}
-
/* Allocate and initialize the ft32 gdbarch object. */
static struct gdbarch *
func_void_type);
TYPE_INSTANCE_FLAGS (tdep->pc_type) |= TYPE_INSTANCE_FLAG_ADDRESS_CLASS_1;
- set_gdbarch_read_pc (gdbarch, ft32_read_pc);
- set_gdbarch_write_pc (gdbarch, ft32_write_pc);
- set_gdbarch_unwind_sp (gdbarch, ft32_unwind_sp);
-
set_gdbarch_num_regs (gdbarch, FT32_NUM_REGS);
set_gdbarch_sp_regnum (gdbarch, FT32_SP_REGNUM);
set_gdbarch_pc_regnum (gdbarch, FT32_PC_REGNUM);
frame_base_set_default (gdbarch, &ft32_frame_base);
- /* Methods for saving / extracting a dummy frame's ID. The ID's
- stack address must match the SP value returned by
- PUSH_DUMMY_CALL, and saved by generic_save_dummy_frame_tos. */
- set_gdbarch_dummy_id (gdbarch, ft32_dummy_id);
-
- set_gdbarch_unwind_pc (gdbarch, ft32_unwind_pc);
-
/* Hook in ABI-specific overrides, if they have been registered. */
gdbarch_init_osabi (info, gdbarch);
projects / deliverable / binutils-gdb.git / blobdiff