int
find_pc_partial_function_gnu_ifunc (CORE_ADDR pc, const char **name,
CORE_ADDR *address, CORE_ADDR *endaddr,
int *is_gnu_ifunc_p)
{
struct obj_section *section;
struct symbol *f;
struct minimal_symbol *msymbol;
struct symtab *symtab = NULL;
struct objfile *objfile;
int i;
CORE_ADDR mapped_pc;
/* To ensure that the symbol returned belongs to the correct setion
(and that the last [random] symbol from the previous section
isn't returned) try to find the section containing PC. First try
the overlay code (which by default returns NULL); and second try
the normal section code (which almost always succeeds). */
section = find_pc_overlay (pc);
if (section == NULL)
section = find_pc_section (pc);
mapped_pc = overlay_mapped_address (pc, section);
if (mapped_pc >= cache_pc_function_low
&& mapped_pc < cache_pc_function_high
&& section == cache_pc_function_section)
goto return_cached_value;
msymbol = lookup_minimal_symbol_by_pc_section (mapped_pc, section);
ALL_OBJFILES (objfile)
{
if (objfile->sf)
symtab = objfile->sf->qf->find_pc_sect_symtab (objfile, msymbol,
mapped_pc, section, 0);
if (symtab)
break;
}
if (symtab)
{
/* Checking whether the msymbol has a larger value is for the
"pathological" case mentioned in print_frame_info. */
f = find_pc_sect_function (mapped_pc, section);
if (f != NULL
&& (msymbol == NULL
|| (BLOCK_START (SYMBOL_BLOCK_VALUE (f))
>= SYMBOL_VALUE_ADDRESS (msymbol))))
{
cache_pc_function_low = BLOCK_START (SYMBOL_BLOCK_VALUE (f));
cache_pc_function_high = BLOCK_END (SYMBOL_BLOCK_VALUE (f));
cache_pc_function_name = SYMBOL_LINKAGE_NAME (f);
cache_pc_function_section = section;
cache_pc_function_is_gnu_ifunc = TYPE_GNU_IFUNC (SYMBOL_TYPE (f));
goto return_cached_value;
}
}
/* Not in the normal symbol tables, see if the pc is in a known
section. If it's not, then give up. This ensures that anything
beyond the end of the text seg doesn't appear to be part of the
last function in the text segment. */
if (!section)
msymbol = NULL;
/* Must be in the minimal symbol table. */
if (msymbol == NULL)
{
/* No available symbol. */
if (name != NULL)
*name = 0;
if (address != NULL)
*address = 0;
if (endaddr != NULL)
*endaddr = 0;
if (is_gnu_ifunc_p != NULL)
*is_gnu_ifunc_p = 0;
return 0;
}
cache_pc_function_low = SYMBOL_VALUE_ADDRESS (msymbol);
cache_pc_function_name = SYMBOL_LINKAGE_NAME (msymbol);
cache_pc_function_section = section;
cache_pc_function_is_gnu_ifunc = MSYMBOL_TYPE (msymbol) == mst_text_gnu_ifunc;
/* If the minimal symbol has a size, use it for the cache.
Otherwise use the lesser of the next minimal symbol in the same
section, or the end of the section, as the end of the
function. */
if (MSYMBOL_SIZE (msymbol) != 0)
cache_pc_function_high = cache_pc_function_low + MSYMBOL_SIZE (msymbol);
else
{
/* Step over other symbols at this same address, and symbols in
other sections, to find the next symbol in this section with
a different address. */
for (i = 1; SYMBOL_LINKAGE_NAME (msymbol + i) != NULL; i++)
{
if (SYMBOL_VALUE_ADDRESS (msymbol + i)
!= SYMBOL_VALUE_ADDRESS (msymbol)
&& SYMBOL_OBJ_SECTION (msymbol + i)
== SYMBOL_OBJ_SECTION (msymbol))
break;
}
if (SYMBOL_LINKAGE_NAME (msymbol + i) != NULL
&& SYMBOL_VALUE_ADDRESS (msymbol + i)
< obj_section_endaddr (section))
cache_pc_function_high = SYMBOL_VALUE_ADDRESS (msymbol + i);
else
/* We got the start address from the last msymbol in the objfile.
So the end address is the end of the section. */
cache_pc_function_high = obj_section_endaddr (section);
}
return_cached_value:
if (address)
{
if (pc_in_unmapped_range (pc, section))
*address = overlay_unmapped_address (cache_pc_function_low, section);
else
*address = cache_pc_function_low;
}
if (name)
*name = cache_pc_function_name;
if (endaddr)
{
if (pc_in_unmapped_range (pc, section))
{
/* Because the high address is actually beyond the end of
the function (and therefore possibly beyond the end of
the overlay), we must actually convert (high - 1) and
then add one to that. */
*endaddr = 1 + overlay_unmapped_address (cache_pc_function_high - 1,
section);
}
else
*endaddr = cache_pc_function_high;
}
if (is_gnu_ifunc_p)
*is_gnu_ifunc_p = cache_pc_function_is_gnu_ifunc;
return 1;
}
static void
convert_one_symbol (struct compile_c_instance *context,
struct symbol *sym,
int is_global,
int is_local)
{
gcc_type sym_type;
const char *filename = symbol_symtab (sym)->filename;
unsigned short line = SYMBOL_LINE (sym);
error_symbol_once (context, sym);
if (SYMBOL_CLASS (sym) == LOC_LABEL)
sym_type = 0;
else
sym_type = convert_type (context, SYMBOL_TYPE (sym));
if (SYMBOL_DOMAIN (sym) == STRUCT_DOMAIN)
{
/* Binding a tag, so we don't need to build a decl. */
C_CTX (context)->c_ops->tagbind (C_CTX (context),
SYMBOL_NATURAL_NAME (sym),
sym_type, filename, line);
}
else
{
gcc_decl decl;
enum gcc_c_symbol_kind kind;
CORE_ADDR addr = 0;
char *symbol_name = NULL;
switch (SYMBOL_CLASS (sym))
{
case LOC_TYPEDEF:
kind = GCC_C_SYMBOL_TYPEDEF;
break;
case LOC_LABEL:
kind = GCC_C_SYMBOL_LABEL;
addr = SYMBOL_VALUE_ADDRESS (sym);
break;
case LOC_BLOCK:
kind = GCC_C_SYMBOL_FUNCTION;
addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
if (is_global && TYPE_GNU_IFUNC (SYMBOL_TYPE (sym)))
addr = gnu_ifunc_resolve_addr (target_gdbarch (), addr);
break;
case LOC_CONST:
if (TYPE_CODE (SYMBOL_TYPE (sym)) == TYPE_CODE_ENUM)
{
/* Already handled by convert_enum. */
return;
}
C_CTX (context)->c_ops->build_constant (C_CTX (context), sym_type,
SYMBOL_NATURAL_NAME (sym),
SYMBOL_VALUE (sym),
filename, line);
return;
case LOC_CONST_BYTES:
error (_("Unsupported LOC_CONST_BYTES for symbol \"%s\"."),
SYMBOL_PRINT_NAME (sym));
case LOC_UNDEF:
internal_error (__FILE__, __LINE__, _("LOC_UNDEF found for \"%s\"."),
SYMBOL_PRINT_NAME (sym));
case LOC_COMMON_BLOCK:
error (_("Fortran common block is unsupported for compilation "
"evaluaton of symbol \"%s\"."),
SYMBOL_PRINT_NAME (sym));
case LOC_OPTIMIZED_OUT:
error (_("Symbol \"%s\" cannot be used for compilation evaluation "
"as it is optimized out."),
SYMBOL_PRINT_NAME (sym));
case LOC_COMPUTED:
if (is_local)
goto substitution;
/* Probably TLS here. */
warning (_("Symbol \"%s\" is thread-local and currently can only "
"be referenced from the current thread in "
"compiled code."),
SYMBOL_PRINT_NAME (sym));
/* FALLTHROUGH */
case LOC_UNRESOLVED:
/* 'symbol_name' cannot be used here as that one is used only for
local variables from compile_dwarf_expr_to_c.
Global variables can be accessed by GCC only by their address, not
by their name. */
{
struct value *val;
struct frame_info *frame = NULL;
if (symbol_read_needs_frame (sym))
{
frame = get_selected_frame (NULL);
if (frame == NULL)
error (_("Symbol \"%s\" cannot be used because "
"there is no selected frame"),
SYMBOL_PRINT_NAME (sym));
}
val = read_var_value (sym, frame);
if (VALUE_LVAL (val) != lval_memory)
error (_("Symbol \"%s\" cannot be used for compilation "
"evaluation as its address has not been found."),
SYMBOL_PRINT_NAME (sym));
kind = GCC_C_SYMBOL_VARIABLE;
addr = value_address (val);
}
break;
case LOC_REGISTER:
case LOC_ARG:
case LOC_REF_ARG:
case LOC_REGPARM_ADDR:
case LOC_LOCAL:
substitution:
kind = GCC_C_SYMBOL_VARIABLE;
symbol_name = symbol_substitution_name (sym);
break;
case LOC_STATIC:
kind = GCC_C_SYMBOL_VARIABLE;
addr = SYMBOL_VALUE_ADDRESS (sym);
break;
case LOC_FINAL_VALUE:
default:
gdb_assert_not_reached ("Unreachable case in convert_one_symbol.");
}
/* Don't emit local variable decls for a raw expression. */
if (context->base.scope != COMPILE_I_RAW_SCOPE
|| symbol_name == NULL)
{
decl = C_CTX (context)->c_ops->build_decl (C_CTX (context),
SYMBOL_NATURAL_NAME (sym),
kind,
sym_type,
symbol_name, addr,
filename, line);
C_CTX (context)->c_ops->bind (C_CTX (context), decl, is_global);
}
xfree (symbol_name);
}
}
CORE_ADDR
find_function_addr (struct value *function, struct type **retval_type)
{
struct type *ftype = check_typedef (value_type (function));
struct gdbarch *gdbarch = get_type_arch (ftype);
struct type *value_type = NULL;
/* Initialize it just to avoid a GCC false warning. */
CORE_ADDR funaddr = 0;
/* If it's a member function, just look at the function
part of it. */
/* Determine address to call. */
if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
|| TYPE_CODE (ftype) == TYPE_CODE_METHOD)
funaddr = value_address (function);
else if (TYPE_CODE (ftype) == TYPE_CODE_PTR)
{
funaddr = value_as_address (function);
ftype = check_typedef (TYPE_TARGET_TYPE (ftype));
if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
|| TYPE_CODE (ftype) == TYPE_CODE_METHOD)
funaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
¤t_target);
}
if (TYPE_CODE (ftype) == TYPE_CODE_FUNC
|| TYPE_CODE (ftype) == TYPE_CODE_METHOD)
{
value_type = TYPE_TARGET_TYPE (ftype);
if (TYPE_GNU_IFUNC (ftype))
{
funaddr = gnu_ifunc_resolve_addr (gdbarch, funaddr);
/* Skip querying the function symbol if no RETVAL_TYPE has been
asked for. */
if (retval_type)
value_type = find_function_return_type (funaddr);
}
}
else if (TYPE_CODE (ftype) == TYPE_CODE_INT)
{
/* Handle the case of functions lacking debugging info.
Their values are characters since their addresses are char. */
if (TYPE_LENGTH (ftype) == 1)
funaddr = value_as_address (value_addr (function));
else
{
/* Handle function descriptors lacking debug info. */
int found_descriptor = 0;
funaddr = 0; /* pacify "gcc -Werror" */
if (VALUE_LVAL (function) == lval_memory)
{
CORE_ADDR nfunaddr;
funaddr = value_as_address (value_addr (function));
nfunaddr = funaddr;
funaddr = gdbarch_convert_from_func_ptr_addr (gdbarch, funaddr,
¤t_target);
if (funaddr != nfunaddr)
found_descriptor = 1;
}
if (!found_descriptor)
/* Handle integer used as address of a function. */
funaddr = (CORE_ADDR) value_as_long (function);
}
}
else
error (_("Invalid data type for function to be called."));
if (retval_type != NULL)
*retval_type = value_type;
return funaddr + gdbarch_deprecated_function_start_offset (gdbarch);
}
