/* Target-dependent code for PowerPC systems using the SVR4 ABI
for GDB, the GNU debugger.
- Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ Copyright 2000, 2001, 2002, 2003, 2005 Free Software Foundation,
+ Inc.
This file is part of GDB.
#include "gdb_assert.h"
#include "ppc-tdep.h"
#include "target.h"
+#include "objfiles.h"
+#include "infcall.h"
/* Pass the arguments in either registers, or in the stack. Using the
ppc sysv ABI, the first eight words of the argument list (that might
starting from r4. */
CORE_ADDR
-ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+ppc_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
for (argno = 0; argno < nargs; argno++)
{
struct value *arg = args[argno];
- struct type *type = check_typedef (VALUE_TYPE (arg));
+ struct type *type = check_typedef (value_type (arg));
int len = TYPE_LENGTH (type);
- char *val = VALUE_CONTENTS (arg);
+ const bfd_byte *val = value_contents (arg);
if (TYPE_CODE (type) == TYPE_CODE_FLT
&& ppc_floating_point_unit_p (current_gdbarch) && len <= 8)
the register's floating-point format. */
char regval[MAX_REGISTER_SIZE];
struct type *regtype
- = register_type (gdbarch, FP0_REGNUM + freg);
+ = register_type (gdbarch, tdep->ppc_fp0_regnum + freg);
convert_typed_floating (val, type, regval, regtype);
- regcache_cooked_write (regcache, FP0_REGNUM + freg,
+ regcache_cooked_write (regcache,
+ tdep->ppc_fp0_regnum + freg,
regval);
}
freg++;
memtype = builtin_type_ieee_double_little;
break;
default:
- internal_error (__FILE__, __LINE__, "bad switch");
+ internal_error (__FILE__, __LINE__, _("bad switch"));
}
convert_typed_floating (val, type, memval, memtype);
write_memory (sp + argoffset, val, len);
/* Floats and doubles stored in "f1". Convert the value to
the required type. */
char regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch, FP0_REGNUM + 1);
- regcache_cooked_read (regcache, FP0_REGNUM + 1, regval);
+ struct type *regtype = register_type (gdbarch,
+ tdep->ppc_fp0_regnum + 1);
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
convert_typed_floating (regval, regtype, readbuf, type);
}
if (writebuf)
/* Floats and doubles stored in "f1". Convert the value to
the register's "double" type. */
char regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch, FP0_REGNUM);
+ struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
convert_typed_floating (writebuf, type, regval, regtype);
- regcache_cooked_write (regcache, FP0_REGNUM + 1, regval);
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
writebuf, 1);
}
+/* The helper function for 64-bit SYSV push_dummy_call. Converts the
+ function's code address back into the function's descriptor
+ address.
+
+ Find a value for the TOC register. Every symbol should have both
+ ".FN" and "FN" in the minimal symbol table. "FN" points at the
+ FN's descriptor, while ".FN" points at the entry point (which
+ matches FUNC_ADDR). Need to reverse from FUNC_ADDR back to the
+ FN's descriptor address (while at the same time being careful to
+ find "FN" in the same object file as ".FN"). */
+
+static int
+convert_code_addr_to_desc_addr (CORE_ADDR code_addr, CORE_ADDR *desc_addr)
+{
+ struct obj_section *dot_fn_section;
+ struct minimal_symbol *dot_fn;
+ struct minimal_symbol *fn;
+ CORE_ADDR toc;
+ /* Find the minimal symbol that corresponds to CODE_ADDR (should
+ have a name of the form ".FN"). */
+ dot_fn = lookup_minimal_symbol_by_pc (code_addr);
+ if (dot_fn == NULL || SYMBOL_LINKAGE_NAME (dot_fn)[0] != '.')
+ return 0;
+ /* Get the section that contains CODE_ADDR. Need this for the
+ "objfile" that it contains. */
+ dot_fn_section = find_pc_section (code_addr);
+ if (dot_fn_section == NULL || dot_fn_section->objfile == NULL)
+ return 0;
+ /* Now find the corresponding "FN" (dropping ".") minimal symbol's
+ address. Only look for the minimal symbol in ".FN"'s object file
+ - avoids problems when two object files (i.e., shared libraries)
+ contain a minimal symbol with the same name. */
+ fn = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (dot_fn) + 1, NULL,
+ dot_fn_section->objfile);
+ if (fn == NULL)
+ return 0;
+ /* Found a descriptor. */
+ (*desc_addr) = SYMBOL_VALUE_ADDRESS (fn);
+ return 1;
+}
+
/* Pass the arguments in either registers, or in the stack. Using the
ppc 64 bit SysV ABI.
greatly simplifies the logic. */
CORE_ADDR
-ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, CORE_ADDR func_addr,
+ppc64_sysv_abi_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
struct regcache *regcache, CORE_ADDR bp_addr,
int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
+ CORE_ADDR func_addr = find_function_addr (function, NULL);
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
/* By this stage in the proceedings, SP has been decremented by "red
zone size" + "struct return size". Fetch the stack-pointer from
for (argno = 0; argno < nargs; argno++)
{
struct value *arg = args[argno];
- struct type *type = check_typedef (VALUE_TYPE (arg));
- char *val = VALUE_CONTENTS (arg);
+ struct type *type = check_typedef (value_type (arg));
+ const bfd_byte *val = value_contents (arg);
if (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) <= 8)
{
/* Floats and Doubles go in f1 .. f13. They also
&& freg <= 13)
{
char regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch,
- FP0_REGNUM);
+ struct type *regtype
+ = register_type (gdbarch, tdep->ppc_fp0_regnum);
convert_typed_floating (val, type, regval, regtype);
- regcache_cooked_write (regcache, FP0_REGNUM + freg,
+ regcache_cooked_write (regcache,
+ tdep->ppc_fp0_regnum + freg,
regval);
}
if (greg <= 10)
}
}
else if ((TYPE_CODE (type) == TYPE_CODE_INT
- || TYPE_CODE (type) == TYPE_CODE_ENUM)
+ || TYPE_CODE (type) == TYPE_CODE_ENUM
+ || TYPE_CODE (type) == TYPE_CODE_PTR)
&& TYPE_LENGTH (type) <= 8)
{
- /* Scalars get sign[un]extended and go in gpr3 .. gpr10.
- They can also end up in memory. */
+ /* Scalars and Pointers get sign[un]extended and go in
+ gpr3 .. gpr10. They can also end up in memory. */
if (write_pass)
{
/* Sign extend the value, then store it unsigned. */
ULONGEST word = unpack_long (type, val);
+ /* Convert any function code addresses into
+ descriptors. */
+ if (TYPE_CODE (type) == TYPE_CODE_PTR
+ && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_FUNC)
+ {
+ CORE_ADDR desc = word;
+ convert_code_addr_to_desc_addr (word, &desc);
+ word = desc;
+ }
if (greg <= 10)
regcache_cooked_write_unsigned (regcache,
tdep->ppc_gp0_regnum +
value to memory. Fortunately, doing this
simplifies the code. */
write_memory (gparam, val, TYPE_LENGTH (type));
+ if (write_pass)
+ /* WARNING: cagney/2004-06-20: It appears that GCC
+ likes to put structures containing a single
+ floating-point member in an FP register instead of
+ general general purpose. */
/* Always consume parameter stack space. */
gparam = align_up (gparam + TYPE_LENGTH (type), tdep->wordsize);
}
breakpoint. */
regcache_cooked_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr);
- /* Find a value for the TOC register. Every symbol should have both
- ".FN" and "FN" in the minimal symbol table. "FN" points at the
- FN's descriptor, while ".FN" points at the entry point (which
- matches FUNC_ADDR). Need to reverse from FUNC_ADDR back to the
- FN's descriptor address. */
+ /* Use the func_addr to find the descriptor, and use that to find
+ the TOC. */
{
- /* Find the minimal symbol that corresponds to FUNC_ADDR (should
- have the name ".FN"). */
- struct minimal_symbol *dot_fn = lookup_minimal_symbol_by_pc (func_addr);
- if (dot_fn != NULL && SYMBOL_LINKAGE_NAME (dot_fn)[0] == '.')
+ CORE_ADDR desc_addr;
+ if (convert_code_addr_to_desc_addr (func_addr, &desc_addr))
{
- /* Now find the corresponding "FN" (dropping ".") minimal
- symbol's address. */
- struct minimal_symbol *fn =
- lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (dot_fn) + 1, NULL,
- NULL);
- if (fn != NULL)
- {
- /* Got the address of that descriptor. The TOC is the
- second double word. */
- CORE_ADDR toc =
- read_memory_unsigned_integer (SYMBOL_VALUE_ADDRESS (fn) +
- tdep->wordsize, tdep->wordsize);
- regcache_cooked_write_unsigned (regcache,
- tdep->ppc_gp0_regnum + 2, toc);
- }
+ /* The TOC is the second double word in the descriptor. */
+ CORE_ADDR toc =
+ read_memory_unsigned_integer (desc_addr + tdep->wordsize,
+ tdep->wordsize);
+ regcache_cooked_write_unsigned (regcache,
+ tdep->ppc_gp0_regnum + 2, toc);
}
}
const void *writebuf)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* This function exists to support a calling convention that
+ requires floating-point registers. It shouldn't be used on
+ processors that lack them. */
+ gdb_assert (ppc_floating_point_unit_p (gdbarch));
+
/* Floats and doubles in F1. */
if (TYPE_CODE (valtype) == TYPE_CODE_FLT && TYPE_LENGTH (valtype) <= 8)
{
char regval[MAX_REGISTER_SIZE];
- struct type *regtype = register_type (gdbarch, FP0_REGNUM);
+ struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
if (writebuf != NULL)
{
convert_typed_floating (writebuf, valtype, regval, regtype);
- regcache_cooked_write (regcache, FP0_REGNUM + 1, regval);
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
}
if (readbuf != NULL)
{
- regcache_cooked_read (regcache, FP0_REGNUM + 1, regval);
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
convert_typed_floating (regval, regtype, readbuf, valtype);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
- if (TYPE_CODE (valtype) == TYPE_CODE_INT && TYPE_LENGTH (valtype) <= 8)
+ if ((TYPE_CODE (valtype) == TYPE_CODE_INT
+ || TYPE_CODE (valtype) == TYPE_CODE_ENUM)
+ && TYPE_LENGTH (valtype) <= 8)
{
/* Integers in r3. */
if (writebuf != NULL)
for (i = 0; i < TYPE_LENGTH (valtype) / 8; i++)
{
if (writebuf != NULL)
- regcache_cooked_write (regcache, FP0_REGNUM + 1 + i,
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
(const bfd_byte *) writebuf + i * 8);
if (readbuf != NULL)
- regcache_cooked_read (regcache, FP0_REGNUM + 1 + i,
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
(bfd_byte *) readbuf + i * 8);
}
}
{
char regval[MAX_REGISTER_SIZE];
struct type *regtype =
- register_type (current_gdbarch, FP0_REGNUM);
+ register_type (current_gdbarch, tdep->ppc_fp0_regnum);
if (writebuf != NULL)
{
convert_typed_floating ((const bfd_byte *) writebuf +
i * (TYPE_LENGTH (valtype) / 2),
valtype, regval, regtype);
- regcache_cooked_write (regcache, FP0_REGNUM + 1 + i,
+ regcache_cooked_write (regcache,
+ tdep->ppc_fp0_regnum + 1 + i,
regval);
}
if (readbuf != NULL)
{
- regcache_cooked_read (regcache, FP0_REGNUM + 1 + i, regval);
+ regcache_cooked_read (regcache,
+ tdep->ppc_fp0_regnum + 1 + i,
+ regval);
convert_typed_floating (regval, regtype,
(bfd_byte *) readbuf +
i * (TYPE_LENGTH (valtype) / 2),
for (i = 0; i < 4; i++)
{
if (writebuf != NULL)
- regcache_cooked_write (regcache, FP0_REGNUM + 1 + i,
+ regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
(const bfd_byte *) writebuf + i * 8);
if (readbuf != NULL)
- regcache_cooked_read (regcache, FP0_REGNUM + 1 + i,
+ regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
(bfd_byte *) readbuf + i * 8);
}
}
projects / deliverable / binutils-gdb.git / blobdiff