static void
lm32_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte *valbuf)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int offset;
ULONGEST l;
CORE_ADDR return_buffer;
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
&& TYPE_CODE (type) != TYPE_CODE_UNION
&& TYPE_CODE (type) != TYPE_CODE_ARRAY && TYPE_LENGTH (type) <= 4)
{
/* Return value is returned in a single register. */
regcache_cooked_read_unsigned (regcache, SIM_LM32_R1_REGNUM, &l);
store_unsigned_integer (valbuf, TYPE_LENGTH (type), byte_order, l);
}
else if ((TYPE_CODE (type) == TYPE_CODE_INT) && (TYPE_LENGTH (type) == 8))
{
/* 64-bit values are returned in a register pair. */
regcache_cooked_read_unsigned (regcache, SIM_LM32_R1_REGNUM, &l);
memcpy (valbuf, &l, 4);
regcache_cooked_read_unsigned (regcache, SIM_LM32_R2_REGNUM, &l);
memcpy (valbuf + 4, &l, 4);
}
else
{
/* Aggregate types greater than a single register are returned in memory.
FIXME: Unless they are only 2 regs?. */
regcache_cooked_read_unsigned (regcache, SIM_LM32_R1_REGNUM, &l);
return_buffer = l;
read_memory (return_buffer, valbuf, TYPE_LENGTH (type));
}
}
/* Fetch the interpreter and executable loadmap addresses (for shared
library support) for the FDPIC ABI. Return 0 if successful, -1 if
not. (E.g, -1 will be returned if the ABI isn't the FDPIC ABI.) */
int
frv_fdpic_loadmap_addresses (struct gdbarch *gdbarch, CORE_ADDR *interp_addr,
CORE_ADDR *exec_addr)
{
if (frv_abi (gdbarch) != FRV_ABI_FDPIC)
return -1;
else
{
struct regcache *regcache = get_current_regcache ();
if (interp_addr != NULL)
{
ULONGEST val;
regcache_cooked_read_unsigned (regcache,
fdpic_loadmap_interp_regnum, &val);
*interp_addr = val;
}
if (exec_addr != NULL)
{
ULONGEST val;
regcache_cooked_read_unsigned (regcache,
fdpic_loadmap_exec_regnum, &val);
*exec_addr = val;
}
return 0;
}
}
static void
arm_linux_cleanup_svc (struct gdbarch *gdbarch,
struct regcache *regs,
struct displaced_step_closure *dsc)
{
CORE_ADDR from = dsc->insn_addr;
ULONGEST apparent_pc;
int within_scratch;
regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &apparent_pc);
within_scratch = (apparent_pc >= dsc->scratch_base
&& apparent_pc < (dsc->scratch_base
+ DISPLACED_MODIFIED_INSNS * 4 + 4));
if (debug_displaced)
{
fprintf_unfiltered (gdb_stdlog, "displaced: PC is apparently %.8lx after "
"SVC step ", (unsigned long) apparent_pc);
if (within_scratch)
fprintf_unfiltered (gdb_stdlog, "(within scratch space)\n");
else
fprintf_unfiltered (gdb_stdlog, "(outside scratch space)\n");
}
if (within_scratch)
displaced_write_reg (regs, dsc, ARM_PC_REGNUM, from + 4, BRANCH_WRITE_PC);
}
static unsigned long
d10v_ts3_imap_register (void *regcache, int reg_nr)
{
ULONGEST reg;
regcache_cooked_read_unsigned (regcache, TS3_IMAP0_REGNUM + reg_nr, ®);
return reg;
}
static void
sparc_ravenscar_store_registers (struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
int buf_size = register_size (gdbarch, regnum);
char buf [buf_size];
ULONGEST register_address;
if (register_in_thread_descriptor_p (regnum))
register_address =
ptid_get_tid (inferior_ptid) + sparc_register_offsets [regnum];
else if (register_on_stack_p (regnum))
{
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM,
®ister_address);
register_address += sparc_register_offsets [regnum];
}
else
return;
regcache_raw_collect (regcache, regnum, buf);
write_memory (register_address,
buf,
buf_size);
}
LONGEST
hppa_hpux_save_state_offset (struct regcache *regcache, int regnum)
{
LONGEST offset;
if (regnum == HPPA_FLAGS_REGNUM)
return ssoff (ss_flags);
if (HPPA_R0_REGNUM < regnum && regnum < HPPA_FP0_REGNUM)
{
struct gdbarch *arch = get_regcache_arch (regcache);
size_t size = register_size (arch, HPPA_R1_REGNUM);
ULONGEST flags;
gdb_assert (size == 4 || size == 8);
regcache_cooked_read_unsigned (regcache, HPPA_FLAGS_REGNUM, &flags);
if (flags & SS_WIDEREGS)
offset = ssoff (ss_wide) + (8 - size) + (regnum - HPPA_R0_REGNUM) * 8;
else
offset = ssoff (ss_narrow) + (regnum - HPPA_R1_REGNUM) * 4;
}
else
{
struct gdbarch *arch = get_regcache_arch (regcache);
size_t size = register_size (arch, HPPA_FP0_REGNUM);
gdb_assert (size == 4 || size == 8);
gdb_assert (regnum >= HPPA_FP0_REGNUM);
offset = ssoff(ss_fpblock) + (regnum - HPPA_FP0_REGNUM) * size;
}
gdb_assert (offset < sizeof (save_state_t));
return offset;
}
static enum return_value_convention
sparc32_return_value (struct gdbarch *gdbarch, struct type *type,
struct regcache *regcache, gdb_byte *readbuf,
const gdb_byte *writebuf)
{
/* The psABI says that "...every stack frame reserves the word at
%fp+64. If a function returns a structure, union, or
quad-precision value, this word should hold the address of the
object into which the return value should be copied." This
guarantees that we can always find the return value, not just
before the function returns. */
if (sparc_structure_or_union_p (type)
|| (sparc_floating_p (type) && TYPE_LENGTH (type) == 16))
{
if (readbuf)
{
ULONGEST sp;
CORE_ADDR addr;
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
addr = read_memory_unsigned_integer (sp + 64, 4);
read_memory (addr, readbuf, TYPE_LENGTH (type));
}
return RETURN_VALUE_ABI_PRESERVES_ADDRESS;
}
if (readbuf)
sparc32_extract_return_value (type, regcache, readbuf);
if (writebuf)
sparc32_store_return_value (type, regcache, writebuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
static LONGEST
arm_linux_get_syscall_number (struct gdbarch *gdbarch,
ptid_t ptid)
{
struct regcache *regs = get_thread_regcache (ptid);
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
ULONGEST pc;
ULONGEST cpsr;
ULONGEST t_bit = arm_psr_thumb_bit (gdbarch);
int is_thumb;
ULONGEST svc_number = -1;
regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &pc);
regcache_cooked_read_unsigned (regs, ARM_PS_REGNUM, &cpsr);
is_thumb = (cpsr & t_bit) != 0;
if (is_thumb)
{
regcache_cooked_read_unsigned (regs, 7, &svc_number);
}
else
{
enum bfd_endian byte_order_for_code =
gdbarch_byte_order_for_code (gdbarch);
/* PC gets incremented before the syscall-stop, so read the
previous instruction. */
unsigned long this_instr =
read_memory_unsigned_integer (pc - 4, 4, byte_order_for_code);
unsigned long svc_operand = (0x00ffffff & this_instr);
if (svc_operand)
{
/* OABI */
svc_number = svc_operand - 0x900000;
}
else
{
/* EABI */
regcache_cooked_read_unsigned (regs, 7, &svc_number);
}
}
return svc_number;
}
static CORE_ADDR
moxie_read_pc (struct regcache *regcache)
{
ULONGEST pc;
regcache_cooked_read_unsigned (regcache, MOXIE_PC_REGNUM, &pc);
return pc;
}
static CORE_ADDR
sparc32_extract_struct_value_address (struct regcache *regcache)
{
ULONGEST sp;
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
return read_memory_unsigned_integer (sp + 64, 4);
}
CORE_ADDR
sparc_address_from_register (int regnum)
{
ULONGEST addr;
regcache_cooked_read_unsigned (current_regcache, regnum, &addr);
return addr;
}
static CORE_ADDR
ft32_read_pc (struct regcache *regcache)
{
ULONGEST pc;
regcache_cooked_read_unsigned (regcache, FT32_PC_REGNUM, &pc);
return pc;
}
static void
moxie_extract_return_value (struct type *type, struct regcache *regcache,
void *dst)
{
bfd_byte *valbuf = dst;
int len = TYPE_LENGTH (type);
ULONGEST tmp;
/* By using store_unsigned_integer we avoid having to do
anything special for small big-endian values. */
regcache_cooked_read_unsigned (regcache, RET1_REGNUM, &tmp);
store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), tmp);
/* Ignore return values more than 8 bytes in size because the moxie
returns anything more than 8 bytes in the stack. */
if (len > 4)
{
regcache_cooked_read_unsigned (regcache, RET1_REGNUM + 1, &tmp);
store_unsigned_integer (valbuf + len - 4, 4, tmp);
}
}
/* If the PPU thread is currently stopped on a spu_run system call,
return to FD and ADDR the file handle and NPC parameter address
used with the system call. Return non-zero if successful. */
static int
parse_spufs_run (ptid_t ptid, int *fd, CORE_ADDR *addr)
{
enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
struct gdbarch_tdep *tdep;
struct regcache *regcache;
gdb_byte buf[4];
#ifdef ALLOW_UNUSED_VARIABLES
CORE_ADDR pc;
#endif /* ALLOW_UNUSED_VARIABLES */
ULONGEST regval;
/* If we're not on PPU, there's nothing to detect. */
if (gdbarch_bfd_arch_info (target_gdbarch)->arch != bfd_arch_powerpc)
return 0;
/* Get PPU-side registers. */
regcache = get_thread_arch_regcache (ptid, target_gdbarch);
tdep = new_gdbarch_tdep(target_gdbarch);
/* Fetch instruction preceding current NIP. */
if (target_read_memory (regcache_read_pc (regcache) - 4, buf, 4) != 0)
return 0;
/* It should be a "sc" instruction. */
if (extract_unsigned_integer_with_byte_order(buf, 4, byte_order) != INSTR_SC)
return 0;
/* System call number should be NR_spu_run. */
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum, ®val);
if (regval != NR_spu_run)
return 0;
/* Register 3 contains fd, register 4 the NPC param pointer. */
regcache_cooked_read_unsigned (regcache, PPC_ORIG_R3_REGNUM, ®val);
*fd = (int) regval;
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 4, ®val);
*addr = (CORE_ADDR) regval;
return 1;
}
static void
enable_watchpoints_in_psr (ptid_t ptid)
{
struct regcache *regcache = get_thread_regcache (ptid);
ULONGEST psr;
regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr);
if (!(psr & IA64_PSR_DB))
{
psr |= IA64_PSR_DB; /* Set the db bit - this enables hardware
watchpoints and breakpoints. */
regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
}
}
static void
ft32_extract_return_value (struct type *type, struct regcache *regcache,
gdb_byte *dst)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
bfd_byte *valbuf = dst;
int len = TYPE_LENGTH (type);
ULONGEST tmp;
/* By using store_unsigned_integer we avoid having to do
anything special for small big-endian values. */
regcache_cooked_read_unsigned (regcache, FT32_R0_REGNUM, &tmp);
store_unsigned_integer (valbuf, (len > 4 ? len - 4 : len), byte_order, tmp);
/* Ignore return values more than 8 bytes in size because the ft32
returns anything more than 8 bytes in the stack. */
if (len > 4)
{
regcache_cooked_read_unsigned (regcache, FT32_R1_REGNUM, &tmp);
store_unsigned_integer (valbuf + len - 4, 4, byte_order, tmp);
}
}
static unsigned long
d10v_ts2_dmap_register (void *regcache, int reg_nr)
{
switch (reg_nr)
{
case 0:
case 1:
return 0x2000;
case 2:
{
ULONGEST reg;
regcache_cooked_read_unsigned (regcache, TS2_DMAP_REGNUM, ®);
return reg;
}
default:
return 0;
}
}
static void
i386fbsd_resume (struct target_ops *ops,
ptid_t ptid, int step, enum gdb_signal signal)
{
pid_t pid = ptid_get_pid (ptid);
int request = PT_STEP;
if (pid == -1)
/* Resume all threads. This only gets used in the non-threaded
case, where "resume all threads" and "resume inferior_ptid" are
the same. */
pid = ptid_get_pid (inferior_ptid);
if (!step)
{
struct regcache *regcache = get_current_regcache ();
ULONGEST eflags;
/* Workaround for a bug in FreeBSD. Make sure that the trace
flag is off when doing a continue. There is a code path
through the kernel which leaves the flag set when it should
have been cleared. If a process has a signal pending (such
as SIGALRM) and we do a PT_STEP, the process never really has
a chance to run because the kernel needs to notify the
debugger that a signal is being sent. Therefore, the process
never goes through the kernel's trap() function which would
normally clear it. */
regcache_cooked_read_unsigned (regcache, I386_EFLAGS_REGNUM,
&eflags);
if (eflags & 0x0100)
regcache_cooked_write_unsigned (regcache, I386_EFLAGS_REGNUM,
eflags & ~0x0100);
request = PT_CONTINUE;
}
/* An addres of (caddr_t) 1 tells ptrace to continue from where it
was. (If GDB wanted it to start some other way, we have already
written a new PC value to the child.) */
if (ptrace (request, pid, (caddr_t) 1,
gdb_signal_to_host (signal)) == -1)
perror_with_name (("ptrace"));
}
static void
sparc64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache));
ULONGEST state;
regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
regcache_cooked_write_unsigned (regcache, tdep->npc_regnum, pc + 4);
/* Clear the "in syscall" bit to prevent the kernel from
messing with the PCs we just installed, if we happen to be
within an interrupted system call that the kernel wants to
restart.
Note that after we return from the dummy call, the TSTATE et al.
registers will be automatically restored, and the kernel
continues to restart the system call at this point. */
regcache_cooked_read_unsigned (regcache, SPARC64_STATE_REGNUM, &state);
state &= ~TSTATE_SYSCALL;
regcache_cooked_write_unsigned (regcache, SPARC64_STATE_REGNUM, state);
}
static void
sparc_ravenscar_fetch_registers (struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
const int sp_regnum = gdbarch_sp_regnum (gdbarch);
const int num_regs = gdbarch_num_regs (gdbarch);
int current_regnum;
CORE_ADDR current_address;
CORE_ADDR thread_descriptor_address;
ULONGEST stack_address;
/* The tid is the thread_id field, which is a pointer to the thread. */
thread_descriptor_address = (CORE_ADDR) ptid_get_tid (inferior_ptid);
/* Read the saved SP in the context buffer. */
current_address = thread_descriptor_address
+ sparc_register_offsets [sp_regnum];
supply_register_at_address (regcache, sp_regnum, current_address);
regcache_cooked_read_unsigned (regcache, sp_regnum, &stack_address);
/* Read registers. */
for (current_regnum = 0; current_regnum < num_regs; current_regnum ++)
{
if (register_in_thread_descriptor_p (current_regnum))
{
current_address = thread_descriptor_address
+ sparc_register_offsets [current_regnum];
supply_register_at_address (regcache, current_regnum,
current_address);
}
else if (register_on_stack_p (current_regnum))
{
current_address = stack_address
+ sparc_register_offsets [current_regnum];
supply_register_at_address (regcache, current_regnum,
current_address);
}
}
}
static int
ia64_linux_stopped_data_address (struct target_ops *ops, CORE_ADDR *addr_p)
{
CORE_ADDR psr;
siginfo_t siginfo;
struct regcache *regcache = get_current_regcache ();
if (!linux_nat_get_siginfo (inferior_ptid, &siginfo))
return 0;
if (siginfo.si_signo != SIGTRAP
|| (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */)
return 0;
regcache_cooked_read_unsigned (regcache, IA64_PSR_REGNUM, &psr);
psr |= IA64_PSR_DD; /* Set the dd bit - this will disable the watchpoint
for the next instruction. */
regcache_cooked_write_unsigned (regcache, IA64_PSR_REGNUM, psr);
*addr_p = (CORE_ADDR) siginfo.si_addr;
return 1;
}
static CORE_ADDR
darwin_read_exec_load_addr_at_init (struct darwin_info *info)
{
struct gdbarch *gdbarch = target_gdbarch ();
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int addr_size = gdbarch_addr_bit (gdbarch) / 8;
ULONGEST load_ptr_addr;
ULONGEST load_addr;
gdb_byte buf[8];
/* Get SP. */
if (regcache_cooked_read_unsigned (get_current_regcache (),
gdbarch_sp_regnum (gdbarch),
&load_ptr_addr) != REG_VALID)
return 0;
/* Read value at SP (image load address). */
if (target_read_memory (load_ptr_addr, buf, addr_size))
return 0;
load_addr = extract_unsigned_integer (buf, addr_size, byte_order);
return darwin_validate_exec_header (load_addr);
}
void
sparc_store_inferior_registers (struct target_ops *ops,
struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = get_regcache_arch (regcache);
int pid;
/* NOTE: cagney/2002-12-02: See comment in fetch_inferior_registers
about threaded assumptions. */
pid = TIDGET (inferior_ptid);
if (pid == 0)
pid = PIDGET (inferior_ptid);
if (regnum == -1 || sparc_gregset_supplies_p (gdbarch, regnum))
{
gregset_t regs;
if (ptrace (PTRACE_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
sparc_collect_gregset (sparc_gregset, regcache, regnum, ®s);
if (ptrace (PTRACE_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
/* Deal with the stack regs. */
if (regnum == -1 || regnum == SPARC_SP_REGNUM
|| (regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM))
{
ULONGEST sp;
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
sparc_collect_rwindow (regcache, sp, regnum);
}
if (regnum != -1)
return;
}
if (regnum == -1 || sparc_fpregset_supplies_p (gdbarch, regnum))
{
fpregset_t fpregs, saved_fpregs;
if (ptrace (PTRACE_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating-point registers"));
memcpy (&saved_fpregs, &fpregs, sizeof (fpregs));
sparc_collect_fpregset (regcache, regnum, &fpregs);
/* Writing the floating-point registers will fail on NetBSD with
EINVAL if the inferior process doesn't have an FPU state
(i.e. if it didn't use the FPU yet). Therefore we don't try
to write the registers if nothing changed. */
if (memcmp (&saved_fpregs, &fpregs, sizeof (fpregs)) != 0)
{
if (ptrace (PTRACE_SETFPREGS, pid,
(PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating-point registers"));
}
if (regnum != -1)
return;
}
}
static CORE_ADDR
rs6000_lynx178_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)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
int ii;
int len = 0;
int argno; /* current argument number */
int argbytes; /* current argument byte */
gdb_byte tmp_buffer[50];
int f_argno = 0; /* current floating point argno */
int wordsize = gdbarch_tdep (gdbarch)->wordsize;
CORE_ADDR func_addr = find_function_addr (function, NULL);
struct value *arg = 0;
struct type *type;
ULONGEST saved_sp;
/* The calling convention this function implements assumes the
processor has floating-point registers. We shouldn't be using it
on PPC variants that lack them. */
gdb_assert (ppc_floating_point_unit_p (gdbarch));
/* The first eight words of ther arguments are passed in registers.
Copy them appropriately. */
ii = 0;
/* If the function is returning a `struct', then the first word
(which will be passed in r3) is used for struct return address.
In that case we should advance one word and start from r4
register to copy parameters. */
if (struct_return)
{
regcache_raw_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
struct_addr);
ii++;
}
/* Effectively indirect call... gcc does...
return_val example( float, int);
eabi:
float in fp0, int in r3
offset of stack on overflow 8/16
for varargs, must go by type.
power open:
float in r3&r4, int in r5
offset of stack on overflow different
both:
return in r3 or f0. If no float, must study how gcc emulates floats;
pay attention to arg promotion.
User may have to cast\args to handle promotion correctly
since gdb won't know if prototype supplied or not. */
for (argno = 0, argbytes = 0; argno < nargs && ii < 8; ++ii)
{
int reg_size = register_size (gdbarch, ii + 3);
arg = args[argno];
type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
/* Floating point arguments are passed in fpr's, as well as gpr's.
There are 13 fpr's reserved for passing parameters. At this point
there is no way we would run out of them.
Always store the floating point value using the register's
floating-point format. */
const int fp_regnum = tdep->ppc_fp0_regnum + 1 + f_argno;
gdb_byte reg_val[MAX_REGISTER_SIZE];
struct type *reg_type = register_type (gdbarch, fp_regnum);
gdb_assert (len <= 8);
convert_typed_floating (value_contents (arg), type,
reg_val, reg_type);
regcache_cooked_write (regcache, fp_regnum, reg_val);
++f_argno;
}
if (len > reg_size)
{
/* Argument takes more than one register. */
while (argbytes < len)
{
gdb_byte word[MAX_REGISTER_SIZE];
memset (word, 0, reg_size);
memcpy (word,
((char *) value_contents (arg)) + argbytes,
(len - argbytes) > reg_size
? reg_size : len - argbytes);
regcache_cooked_write (regcache,
tdep->ppc_gp0_regnum + 3 + ii,
word);
++ii, argbytes += reg_size;
if (ii >= 8)
goto ran_out_of_registers_for_arguments;
}
argbytes = 0;
--ii;
}
else
{
/* Argument can fit in one register. No problem. */
int adj = gdbarch_byte_order (gdbarch)
== BFD_ENDIAN_BIG ? reg_size - len : 0;
gdb_byte word[MAX_REGISTER_SIZE];
memset (word, 0, reg_size);
memcpy (word, value_contents (arg), len);
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3 +ii, word);
}
++argno;
}
ran_out_of_registers_for_arguments:
regcache_cooked_read_unsigned (regcache,
gdbarch_sp_regnum (gdbarch),
&saved_sp);
/* Location for 8 parameters are always reserved. */
sp -= wordsize * 8;
/* Another six words for back chain, TOC register, link register, etc. */
sp -= wordsize * 6;
/* Stack pointer must be quadword aligned. */
sp = align_down (sp, 16);
/* If there are more arguments, allocate space for them in
the stack, then push them starting from the ninth one. */
if ((argno < nargs) || argbytes)
{
int space = 0, jj;
if (argbytes)
{
space += align_up (len - argbytes, 4);
jj = argno + 1;
}
else
jj = argno;
for (; jj < nargs; ++jj)
{
struct value *val = args[jj];
space += align_up (TYPE_LENGTH (value_type (val)), 4);
}
/* Add location required for the rest of the parameters. */
space = align_up (space, 16);
sp -= space;
/* This is another instance we need to be concerned about
securing our stack space. If we write anything underneath %sp
(r1), we might conflict with the kernel who thinks he is free
to use this area. So, update %sp first before doing anything
else. */
regcache_raw_write_signed (regcache,
gdbarch_sp_regnum (gdbarch), sp);
/* If the last argument copied into the registers didn't fit there
completely, push the rest of it into stack. */
if (argbytes)
{
write_memory (sp + 24 + (ii * 4),
value_contents (arg) + argbytes,
len - argbytes);
++argno;
ii += align_up (len - argbytes, 4) / 4;
}
/* Push the rest of the arguments into stack. */
for (; argno < nargs; ++argno)
{
arg = args[argno];
type = check_typedef (value_type (arg));
len = TYPE_LENGTH (type);
/* Float types should be passed in fpr's, as well as in the
stack. */
if (TYPE_CODE (type) == TYPE_CODE_FLT && f_argno < 13)
{
gdb_assert (len <= 8);
regcache_cooked_write (regcache,
tdep->ppc_fp0_regnum + 1 + f_argno,
value_contents (arg));
++f_argno;
}
write_memory (sp + 24 + (ii * 4), value_contents (arg), len);
ii += align_up (len, 4) / 4;
}
}
/* Set the stack pointer. According to the ABI, the SP is meant to
be set _before_ the corresponding stack space is used. On AIX,
this even applies when the target has been completely stopped!
Not doing this can lead to conflicts with the kernel which thinks
that it still has control over this not-yet-allocated stack
region. */
regcache_raw_write_signed (regcache, gdbarch_sp_regnum (gdbarch), sp);
/* Set back chain properly. */
store_unsigned_integer (tmp_buffer, wordsize, byte_order, saved_sp);
write_memory (sp, tmp_buffer, wordsize);
/* Point the inferior function call's return address at the dummy's
breakpoint. */
regcache_raw_write_signed (regcache, tdep->ppc_lr_regnum, bp_addr);
target_store_registers (regcache, -1);
return sp;
}
static enum return_value_convention
rs6000_lynx178_return_value (struct gdbarch *gdbarch, struct value *function,
struct type *valtype, struct regcache *regcache,
gdb_byte *readbuf, const gdb_byte *writebuf)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* The calling convention this function implements assumes the
processor has floating-point registers. We shouldn't be using it
on PowerPC variants that lack them. */
gdb_assert (ppc_floating_point_unit_p (gdbarch));
/* AltiVec extension: Functions that declare a vector data type as a
return value place that return value in VR2. */
if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY && TYPE_VECTOR (valtype)
&& TYPE_LENGTH (valtype) == 16)
{
if (readbuf)
regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);
if (writebuf)
regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* If the called subprogram returns an aggregate, there exists an
implicit first argument, whose value is the address of a caller-
allocated buffer into which the callee is assumed to store its
return value. All explicit parameters are appropriately
relabeled. */
if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT
|| TYPE_CODE (valtype) == TYPE_CODE_UNION
|| TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
return RETURN_VALUE_STRUCT_CONVENTION;
/* Scalar floating-point values are returned in FPR1 for float or
double, and in FPR1:FPR2 for quadword precision. Fortran
complex*8 and complex*16 are returned in FPR1:FPR2, and
complex*32 is returned in FPR1:FPR4. */
if (TYPE_CODE (valtype) == TYPE_CODE_FLT
&& (TYPE_LENGTH (valtype) == 4 || TYPE_LENGTH (valtype) == 8))
{
struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
gdb_byte regval[8];
/* FIXME: kettenis/2007-01-01: Add support for quadword
precision and complex. */
if (readbuf)
{
regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1, regval);
convert_typed_floating (regval, regtype, readbuf, valtype);
}
if (writebuf)
{
convert_typed_floating (writebuf, valtype, regval, regtype);
regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* Values of the types int, long, short, pointer, and char (length
is less than or equal to four bytes), as well as bit values of
lengths less than or equal to 32 bits, must be returned right
justified in GPR3 with signed values sign extended and unsigned
values zero extended, as necessary. */
if (TYPE_LENGTH (valtype) <= tdep->wordsize)
{
if (readbuf)
{
ULONGEST regval;
/* For reading we don't have to worry about sign extension. */
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
®val);
store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), byte_order,
regval);
}
if (writebuf)
{
/* For writing, use unpack_long since that should handle any
required sign extension. */
regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
unpack_long (valtype, writebuf));
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* Eight-byte non-floating-point scalar values must be returned in
GPR3:GPR4. */
if (TYPE_LENGTH (valtype) == 8)
{
gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_FLT);
gdb_assert (tdep->wordsize == 4);
if (readbuf)
{
gdb_byte regval[8];
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, regval);
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 4,
regval + 4);
memcpy (readbuf, regval, 8);
}
if (writebuf)
{
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
writebuf + 4);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
return RETURN_VALUE_STRUCT_CONVENTION;
}
static enum return_value_convention
d10v_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, void *readbuf,
const void *writebuf)
{
if (TYPE_LENGTH (valtype) > 8)
/* Anything larger than 8 bytes (4 registers) goes on the stack. */
return RETURN_VALUE_STRUCT_CONVENTION;
if (TYPE_LENGTH (valtype) == 5
|| TYPE_LENGTH (valtype) == 6)
/* Anything 5 or 6 bytes in size goes in memory. Contents don't
appear to matter. Note that 7 and 8 byte objects do end up in
registers! */
return RETURN_VALUE_STRUCT_CONVENTION;
if (TYPE_LENGTH (valtype) == 1)
{
/* All single byte values go in a register stored right-aligned.
Note: 2 byte integer values are handled further down. */
if (readbuf)
{
/* Since TYPE is smaller than the register, there isn't a
sign extension problem. Let the extraction truncate the
register value. */
ULONGEST regval;
regcache_cooked_read_unsigned (regcache, R0_REGNUM,
®val);
store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), regval);
}
if (writebuf)
{
ULONGEST regval;
if (TYPE_CODE (valtype) == TYPE_CODE_INT)
/* Some sort of integer value stored in R0. Use
unpack_long since that should handle any required sign
extension. */
regval = unpack_long (valtype, writebuf);
else
/* Some other type. Don't sign-extend the value when
storing it in the register. */
regval = extract_unsigned_integer (writebuf, 1);
regcache_cooked_write_unsigned (regcache, R0_REGNUM, regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
|| TYPE_CODE (valtype) == TYPE_CODE_UNION)
&& TYPE_NFIELDS (valtype) > 1
&& TYPE_FIELD_BITPOS (valtype, 1) == 8)
/* If a composite is 8 bit aligned (determined by looking at the
start address of the second field), put it in memory. */
return RETURN_VALUE_STRUCT_CONVENTION;
/* Assume it is in registers. */
if (writebuf || readbuf)
{
int reg;
/* Per above, the value is never more than 8 bytes long. */
gdb_assert (TYPE_LENGTH (valtype) <= 8);
/* Xfer 2 bytes at a time. */
for (reg = 0; (reg * 2) + 1 < TYPE_LENGTH (valtype); reg++)
{
if (readbuf)
regcache_cooked_read (regcache, R0_REGNUM + reg,
(bfd_byte *) readbuf + reg * 2);
if (writebuf)
regcache_cooked_write (regcache, R0_REGNUM + reg,
(bfd_byte *) writebuf + reg * 2);
}
/* Any trailing byte ends up _left_ aligned. */
if ((reg * 2) < TYPE_LENGTH (valtype))
{
if (readbuf)
regcache_cooked_read_part (regcache, R0_REGNUM + reg,
0, 1, (bfd_byte *) readbuf + reg * 2);
if (writebuf)
regcache_cooked_write_part (regcache, R0_REGNUM + reg,
0, 1, (bfd_byte *) writebuf + reg * 2);
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
void
sparc32_supply_gregset (const struct sparc_gregset *gregset,
struct regcache *regcache,
int regnum, const void *gregs)
{
const gdb_byte *regs = gregs;
int i;
if (regnum == SPARC32_PSR_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SPARC32_PSR_REGNUM,
regs + gregset->r_psr_offset);
if (regnum == SPARC32_PC_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SPARC32_PC_REGNUM,
regs + gregset->r_pc_offset);
if (regnum == SPARC32_NPC_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SPARC32_NPC_REGNUM,
regs + gregset->r_npc_offset);
if (regnum == SPARC32_Y_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SPARC32_Y_REGNUM,
regs + gregset->r_y_offset);
if (regnum == SPARC_G0_REGNUM || regnum == -1)
regcache_raw_supply (regcache, SPARC_G0_REGNUM, NULL);
if ((regnum >= SPARC_G1_REGNUM && regnum <= SPARC_O7_REGNUM) || regnum == -1)
{
int offset = gregset->r_g1_offset;
for (i = SPARC_G1_REGNUM; i <= SPARC_O7_REGNUM; i++)
{
if (regnum == i || regnum == -1)
regcache_raw_supply (regcache, i, regs + offset);
offset += 4;
}
}
if ((regnum >= SPARC_L0_REGNUM && regnum <= SPARC_I7_REGNUM) || regnum == -1)
{
/* Not all of the register set variants include Locals and
Inputs. For those that don't, we read them off the stack. */
if (gregset->r_l0_offset == -1)
{
ULONGEST sp;
regcache_cooked_read_unsigned (regcache, SPARC_SP_REGNUM, &sp);
sparc_supply_rwindow (regcache, sp, regnum);
}
else
{
int offset = gregset->r_l0_offset;
for (i = SPARC_L0_REGNUM; i <= SPARC_I7_REGNUM; i++)
{
if (regnum == i || regnum == -1)
regcache_raw_supply (regcache, i, regs + offset);
offset += 4;
}
}
}
}
/* The 64 bit ABI retun value convention.
Return non-zero if the return-value is stored in a register, return
0 if the return-value is instead stored on the stack (a.k.a.,
struct return convention).
For a return-value stored in a register: when WRITEBUF is non-NULL,
copy the buffer to the corresponding register return-value location
location; when READBUF is non-NULL, fill the buffer from the
corresponding register return-value location. */
enum return_value_convention
ppc64_sysv_abi_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, gdb_byte *readbuf,
const gdb_byte *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)
{
gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
if (writebuf != NULL)
{
convert_typed_floating (writebuf, valtype, regval, regtype);
regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
}
if (readbuf != NULL)
{
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_CODE (valtype) == TYPE_CODE_ENUM)
&& TYPE_LENGTH (valtype) <= 8)
{
/* Integers in r3. */
if (writebuf != NULL)
{
/* Be careful to sign extend the value. */
regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
unpack_long (valtype, writebuf));
}
if (readbuf != NULL)
{
/* Extract the integer from r3. Since this is truncating the
value, there isn't a sign extension problem. */
ULONGEST regval;
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
®val);
store_unsigned_integer (readbuf, TYPE_LENGTH (valtype), regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* All pointers live in r3. */
if (TYPE_CODE (valtype) == TYPE_CODE_PTR)
{
/* All pointers live in r3. */
if (writebuf != NULL)
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3, writebuf);
if (readbuf != NULL)
regcache_cooked_read (regcache, tdep->ppc_gp0_regnum + 3, readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_CODE (valtype) == TYPE_CODE_ARRAY
&& TYPE_LENGTH (valtype) <= 8
&& TYPE_CODE (TYPE_TARGET_TYPE (valtype)) == TYPE_CODE_INT
&& TYPE_LENGTH (TYPE_TARGET_TYPE (valtype)) == 1)
{
/* Small character arrays are returned, right justified, in r3. */
int offset = (register_size (gdbarch, tdep->ppc_gp0_regnum + 3)
- TYPE_LENGTH (valtype));
if (writebuf != NULL)
regcache_cooked_write_part (regcache, tdep->ppc_gp0_regnum + 3,
offset, TYPE_LENGTH (valtype), writebuf);
if (readbuf != NULL)
regcache_cooked_read_part (regcache, tdep->ppc_gp0_regnum + 3,
offset, TYPE_LENGTH (valtype), readbuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* Big floating point values get stored in adjacent floating
point registers. */
if (TYPE_CODE (valtype) == TYPE_CODE_FLT
&& (TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 32))
{
if (writebuf || readbuf != NULL)
{
int i;
for (i = 0; i < TYPE_LENGTH (valtype) / 8; i++)
{
if (writebuf != NULL)
regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
(const bfd_byte *) writebuf + i * 8);
if (readbuf != NULL)
regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
(bfd_byte *) readbuf + i * 8);
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* Complex values get returned in f1:f2, need to convert. */
if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX
&& (TYPE_LENGTH (valtype) == 8 || TYPE_LENGTH (valtype) == 16))
{
if (regcache != NULL)
{
int i;
for (i = 0; i < 2; i++)
{
gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype =
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,
tdep->ppc_fp0_regnum + 1 + i,
regval);
}
if (readbuf != NULL)
{
regcache_cooked_read (regcache,
tdep->ppc_fp0_regnum + 1 + i,
regval);
convert_typed_floating (regval, regtype,
(bfd_byte *) readbuf +
i * (TYPE_LENGTH (valtype) / 2),
valtype);
}
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* Big complex values get stored in f1:f4. */
if (TYPE_CODE (valtype) == TYPE_CODE_COMPLEX && TYPE_LENGTH (valtype) == 32)
{
if (regcache != NULL)
{
int i;
for (i = 0; i < 4; i++)
{
if (writebuf != NULL)
regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1 + i,
(const bfd_byte *) writebuf + i * 8);
if (readbuf != NULL)
regcache_cooked_read (regcache, tdep->ppc_fp0_regnum + 1 + i,
(bfd_byte *) readbuf + i * 8);
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
return RETURN_VALUE_STRUCT_CONVENTION;
}
static void
i386_linux_resume (struct target_ops *ops,
ptid_t ptid, int step, enum gdb_signal signal)
{
int pid = ptid_get_pid (ptid);
int request;
if (catch_syscall_enabled () > 0)
request = PTRACE_SYSCALL;
else
request = PTRACE_CONT;
if (step)
{
struct regcache *regcache = get_thread_regcache (pid_to_ptid (pid));
struct gdbarch *gdbarch = get_regcache_arch (regcache);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
ULONGEST pc;
gdb_byte buf[LINUX_SYSCALL_LEN];
request = PTRACE_SINGLESTEP;
regcache_cooked_read_unsigned (regcache,
gdbarch_pc_regnum (gdbarch), &pc);
/* Returning from a signal trampoline is done by calling a
special system call (sigreturn or rt_sigreturn, see
i386-linux-tdep.c for more information). This system call
restores the registers that were saved when the signal was
raised, including %eflags. That means that single-stepping
won't work. Instead, we'll have to modify the signal context
that's about to be restored, and set the trace flag there. */
/* First check if PC is at a system call. */
if (target_read_memory (pc, buf, LINUX_SYSCALL_LEN) == 0
&& memcmp (buf, linux_syscall, LINUX_SYSCALL_LEN) == 0)
{
ULONGEST syscall;
regcache_cooked_read_unsigned (regcache,
LINUX_SYSCALL_REGNUM, &syscall);
/* Then check the system call number. */
if (syscall == SYS_sigreturn || syscall == SYS_rt_sigreturn)
{
ULONGEST sp, addr;
unsigned long int eflags;
regcache_cooked_read_unsigned (regcache, I386_ESP_REGNUM, &sp);
if (syscall == SYS_rt_sigreturn)
addr = read_memory_unsigned_integer (sp + 8, 4, byte_order)
+ 20;
else
addr = sp;
/* Set the trace flag in the context that's about to be
restored. */
addr += LINUX_SIGCONTEXT_EFLAGS_OFFSET;
read_memory (addr, (gdb_byte *) &eflags, 4);
eflags |= 0x0100;
write_memory (addr, (gdb_byte *) &eflags, 4);
}
}
}
if (ptrace (request, pid, 0, gdb_signal_to_host (signal)) == -1)
perror_with_name (("ptrace"));
}
static enum return_value_convention
do_ppc_sysv_return_value (struct gdbarch *gdbarch, struct type *type,
/* APPLE LOCAL gdb_byte */
struct regcache *regcache, gdb_byte *readbuf,
/* APPLE LOCAL gdb_byte */
const gdb_byte *writebuf, int broken_gcc)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
gdb_assert (tdep->wordsize == 4);
if (TYPE_CODE (type) == TYPE_CODE_FLT
&& TYPE_LENGTH (type) <= 8
&& ppc_floating_point_unit_p (gdbarch))
{
if (readbuf)
{
/* Floats and doubles stored in "f1". Convert the value to
the required type. */
gdb_byte regval[MAX_REGISTER_SIZE];
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. */
gdb_byte regval[MAX_REGISTER_SIZE];
struct type *regtype = register_type (gdbarch, tdep->ppc_fp0_regnum);
convert_typed_floating (writebuf, type, regval, regtype);
regcache_cooked_write (regcache, tdep->ppc_fp0_regnum + 1, regval);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* APPLE LOCAL: gcc 3.3 had 8 byte long doubles, but gcc 4.0 uses 16 byte
long doubles even for 32 bit ppc. They are stored across f1 & f2. */
/* Big floating point values get stored in adjacent floating
point registers. */
if (TYPE_CODE (type) == TYPE_CODE_FLT
&& (TYPE_LENGTH (type) == 16 || TYPE_LENGTH (type) == 32))
{
if (writebuf || readbuf != NULL)
{
int i;
for (i = 0; i < TYPE_LENGTH (type) / 8; i++)
{
if (writebuf != NULL)
regcache_cooked_write (regcache, FP0_REGNUM + 1 + i,
(const bfd_byte *) writebuf + i * 8);
if (readbuf != NULL)
regcache_cooked_read (regcache, FP0_REGNUM + 1 + i,
(bfd_byte *) readbuf + i * 8);
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
/* END APPLE LOCAL */
if ((TYPE_CODE (type) == TYPE_CODE_INT && TYPE_LENGTH (type) == 8)
|| (TYPE_CODE (type) == TYPE_CODE_FLT && TYPE_LENGTH (type) == 8))
{
if (readbuf)
{
/* A long long, or a double stored in the 32 bit r3/r4. */
ppc_copy_from_greg (regcache, tdep->ppc_gp0_regnum + 3,
tdep->wordsize, 8, (bfd_byte *) readbuf);
}
if (writebuf)
{
/* A long long, or a double stored in the 32 bit r3/r4. */
ppc_copy_into_greg (regcache, tdep->ppc_gp0_regnum + 3,
tdep->wordsize, 8, writebuf);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_CODE (type) == TYPE_CODE_INT
&& TYPE_LENGTH (type) <= tdep->wordsize)
{
if (readbuf)
{
/* Some sort of integer stored in r3. Since TYPE isn't
bigger than the register, sign extension isn't a problem
- just do everything unsigned. */
ULONGEST regval;
regcache_cooked_read_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
®val);
store_unsigned_integer (readbuf, TYPE_LENGTH (type), regval);
}
if (writebuf)
{
/* Some sort of integer stored in r3. Use unpack_long since
that should handle any required sign extension. */
regcache_cooked_write_unsigned (regcache, tdep->ppc_gp0_regnum + 3,
unpack_long (type, writebuf));
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) == 16
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type) && tdep->ppc_vr0_regnum >= 0)
{
if (readbuf)
{
/* Altivec places the return value in "v2". */
regcache_cooked_read (regcache, tdep->ppc_vr0_regnum + 2, readbuf);
}
if (writebuf)
{
/* Altivec places the return value in "v2". */
regcache_cooked_write (regcache, tdep->ppc_vr0_regnum + 2, writebuf);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) == 8
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type) && tdep->ppc_ev0_regnum >= 0)
{
/* The e500 ABI places return values for the 64-bit DSP types
(__ev64_opaque__) in r3. However, in GDB-speak, ev3
corresponds to the entire r3 value for e500, whereas GDB's r3
only corresponds to the least significant 32-bits. So place
the 64-bit DSP type's value in ev3. */
if (readbuf)
regcache_cooked_read (regcache, tdep->ppc_ev0_regnum + 3, readbuf);
if (writebuf)
regcache_cooked_write (regcache, tdep->ppc_ev0_regnum + 3, writebuf);
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (broken_gcc && TYPE_LENGTH (type) <= 8)
{
if (readbuf)
{
/* GCC screwed up. The last register isn't "left" aligned.
Need to extract the least significant part of each
register and then store that. */
/* Transfer any full words. */
int word = 0;
while (1)
{
ULONGEST reg;
int len = TYPE_LENGTH (type) - word * tdep->wordsize;
if (len <= 0)
break;
if (len > tdep->wordsize)
len = tdep->wordsize;
regcache_cooked_read_unsigned (regcache,
tdep->ppc_gp0_regnum + 3 + word,
®);
store_unsigned_integer (((bfd_byte *) readbuf
+ word * tdep->wordsize), len, reg);
word++;
}
}
if (writebuf)
{
/* GCC screwed up. The last register isn't "left" aligned.
Need to extract the least significant part of each
register and then store that. */
/* Transfer any full words. */
int word = 0;
while (1)
{
ULONGEST reg;
int len = TYPE_LENGTH (type) - word * tdep->wordsize;
if (len <= 0)
break;
if (len > tdep->wordsize)
len = tdep->wordsize;
reg = extract_unsigned_integer (((const bfd_byte *) writebuf
+ word * tdep->wordsize), len);
regcache_cooked_write_unsigned (regcache,
tdep->ppc_gp0_regnum + 3 + word,
reg);
word++;
}
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
if (TYPE_LENGTH (type) <= 8)
{
if (readbuf)
{
/* This matches SVr4 PPC, it does not match GCC. */
/* The value is right-padded to 8 bytes and then loaded, as
two "words", into r3/r4. */
ppc_copy_from_greg (regcache, tdep->ppc_gp0_regnum + 3,
tdep->wordsize, TYPE_LENGTH (type), readbuf);
}
if (writebuf)
{
/* This matches SVr4 PPC, it does not match GCC. */
/* The value is padded out to 8 bytes and then loaded, as
two "words" into r3/r4. */
gdb_byte regvals[MAX_REGISTER_SIZE * 2];
memset (regvals, 0, sizeof regvals);
memcpy (regvals, writebuf, TYPE_LENGTH (type));
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 3,
regvals + 0 * tdep->wordsize);
if (TYPE_LENGTH (type) > tdep->wordsize)
regcache_cooked_write (regcache, tdep->ppc_gp0_regnum + 4,
regvals + 1 * tdep->wordsize);
}
return RETURN_VALUE_REGISTER_CONVENTION;
}
return RETURN_VALUE_STRUCT_CONVENTION;
}
