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* Makefile.in (ppc_tdep_h): Define.

Browse Source 
(ppc-linux-nat.o)
(ppc-linux-tdep.o)
(rs6000-tdep.o): Use $(ppc_tdep_h).
(ppc-sysv-tdep.o)
(ppcnbsd-nat.o)
(ppcnbsd-tdep.o): New dependency lists.
* ppc-tdep.h: Use generic OS ABI framework.
* ppc-linux-tdep.c (_initialize_ppc_linux_tdep,
ppc_linux_init_abi): New functions.
(ppc_sysv_abi_broken_use_struct_convention)
(ppc_sysv_abi_use_struct_convention)
(ppc_sysv_abi_push_arguments): Move to...
* ppc-sysv-tdep.c: ...here.
* ppcnbsd-nat.c: Don't include gdbcore.h and regcache.h.
* rs6000-tdep.c (process_note_abi_tag_sections)
(get_elfosabi): Remove.
(rs6000_gdbarch_init): Use generic OS ABI framework.
(rs6000_dump_tdep): New function.
(_initialize_rs6000_tdep): Use gdbarch_register.
* config/powerpc/linux.mt (TDEPFILES): Add ppc-sysv-tdep.o.
* config/powerpc/nbsd.mh (NATDEPFILES): Remove solib-legacy.o.
* config/powerpc/aix.mt (TDEPFILES): Use ppc-sysv-tdep.o instead
of ppc-linux-tdep.o.
* config/powerpc/nbsd.mt (TDEPFILES): Likewise.
* config/powerpc/ppc-eabi.mt (TDEPFILES): Likewise.
* config/powerpc/ppc-sim.mt (TDEPFILES): Likewise.
* config/powerpc/ppcle-eabi.mt (TDEPFILES): Likewise.
* config/powerpc/ppcle-sim.mt (TDEPFILES): Likewise.
* config/powerpc/vxworks.mt (TDEPFILES): Likewise.
This commit is contained in:
Jason Thorpe
2002-05-30 01:21:53 +00:00
parent d79e4ea30e
commit 7b112f9c0c
16 changed files with 446 additions and 433 deletions
Download Patch File Download Diff File Expand all files Collapse all files

328
gdb/ppc-linux-tdep.c
View File

@@ -411,293 +411,6 @@ ppc_linux_frame_chain (struct frame_info *thisframe)
return rs6000_frame_chain (thisframe);
}
/* FIXME: Move the following to rs6000-tdep.c (or some other file where
it may be used generically by ports which use either the SysV ABI or
the EABI */
/* Until November 2001, gcc was not complying to the SYSV ABI for
returning structures less than or equal to 8 bytes in size. It was
returning everything in memory. When this was corrected, it wasn't
fixed for native platforms. */
int
ppc_sysv_abi_broken_use_struct_convention (int gcc_p, struct type *value_type)
{
if (TYPE_LENGTH (value_type) == 16
&& TYPE_VECTOR (value_type))
return 0;
return generic_use_struct_convention (gcc_p, value_type);
}
/* Structures 8 bytes or less long are returned in the r3 & r4
registers, according to the SYSV ABI. */
int
ppc_sysv_abi_use_struct_convention (int gcc_p, struct type *value_type)
{
if (TYPE_LENGTH (value_type) == 16
&& TYPE_VECTOR (value_type))
return 0;
return (TYPE_LENGTH (value_type) > 8);
}
/* round2 rounds x up to the nearest multiple of s assuming that s is a
power of 2 */
#undef round2
#define round2(x,s) ((((long) (x) - 1) & ~(long)((s)-1)) + (s))
/* 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
be less than eight parameters if some parameters occupy more than one
word) are passed in r3..r10 registers. float and double parameters are
passed in fpr's, in addition to that. Rest of the parameters if any
are passed in user stack.
If the function is returning a structure, then the return address is passed
in r3, then the first 7 words of the parametes can be passed in registers,
starting from r4. */
CORE_ADDR
ppc_sysv_abi_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
int struct_return, CORE_ADDR struct_addr)
{
int argno;
/* Next available general register for non-float, non-vector arguments. */
int greg;
/* Next available floating point register for float arguments. */
int freg;
/* Next available vector register for vector arguments. */
int vreg;
int argstkspace;
int structstkspace;
int argoffset;
int structoffset;
struct value *arg;
struct type *type;
int len;
char old_sp_buf[4];
CORE_ADDR saved_sp;
greg = struct_return ? 4 : 3;
freg = 1;
vreg = 2;
argstkspace = 0;
structstkspace = 0;
/* Figure out how much new stack space is required for arguments
which don't fit in registers. Unlike the PowerOpen ABI, the
SysV ABI doesn't reserve any extra space for parameters which
are put in registers. */
for (argno = 0; argno < nargs; argno++)
{
arg = args[argno];
type = check_typedef (VALUE_TYPE (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
if (freg <= 8)
freg++;
else
{
/* SysV ABI converts floats to doubles when placed in
memory and requires 8 byte alignment */
if (argstkspace & 0x4)
argstkspace += 4;
argstkspace += 8;
}
}
else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */
{
if (greg > 9)
{
greg = 11;
if (argstkspace & 0x4)
argstkspace += 4;
argstkspace += 8;
}
else
{
if ((greg & 1) == 0)
greg++;
greg += 2;
}
}
else if (!TYPE_VECTOR (type))
{
if (len > 4
|| TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
{
/* Rounding to the nearest multiple of 8 may not be necessary,
but it is safe. Particularly since we don't know the
field types of the structure */
structstkspace += round2 (len, 8);
}
if (greg <= 10)
greg++;
else
argstkspace += 4;
}
else
{
if (len == 16
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type))
{
if (vreg <= 13)
vreg++;
else
{
/* Vector arguments must be aligned to 16 bytes on
the stack. */
argstkspace += round2 (argstkspace, 16);
argstkspace += 16;
}
}
}
}
/* Get current SP location */
saved_sp = read_sp ();
sp -= argstkspace + structstkspace;
/* Allocate space for backchain and callee's saved lr */
sp -= 8;
/* Make sure that we maintain 16 byte alignment */
sp &= ~0x0f;
/* Update %sp before proceeding any further */
write_register (SP_REGNUM, sp);
/* write the backchain */
store_address (old_sp_buf, 4, saved_sp);
write_memory (sp, old_sp_buf, 4);
argoffset = 8;
structoffset = argoffset + argstkspace;
freg = 1;
greg = 3;
vreg = 2;
/* Fill in r3 with the return structure, if any */
if (struct_return)
{
char val_buf[4];
store_address (val_buf, 4, struct_addr);
memcpy (&registers[REGISTER_BYTE (greg)], val_buf, 4);
greg++;
}
/* Now fill in the registers and stack... */
for (argno = 0; argno < nargs; argno++)
{
arg = args[argno];
type = check_typedef (VALUE_TYPE (arg));
len = TYPE_LENGTH (type);
if (TYPE_CODE (type) == TYPE_CODE_FLT)
{
if (freg <= 8)
{
if (len > 8)
printf_unfiltered (
"Fatal Error: a floating point parameter #%d with a size > 8 is found!\n", argno);
memcpy (&registers[REGISTER_BYTE (FP0_REGNUM + freg)],
VALUE_CONTENTS (arg), len);
freg++;
}
else
{
/* SysV ABI converts floats to doubles when placed in
memory and requires 8 byte alignment */
/* FIXME: Convert floats to doubles */
if (argoffset & 0x4)
argoffset += 4;
write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len);
argoffset += 8;
}
}
else if (TYPE_CODE (type) == TYPE_CODE_INT && len == 8) /* long long */
{
if (greg > 9)
{
greg = 11;
if (argoffset & 0x4)
argoffset += 4;
write_memory (sp + argoffset, (char *) VALUE_CONTENTS (arg), len);
argoffset += 8;
}
else
{
if ((greg & 1) == 0)
greg++;
memcpy (&registers[REGISTER_BYTE (greg)],
VALUE_CONTENTS (arg), 4);
memcpy (&registers[REGISTER_BYTE (greg + 1)],
VALUE_CONTENTS (arg) + 4, 4);
greg += 2;
}
}
else if (!TYPE_VECTOR (type))
{
char val_buf[4];
if (len > 4
|| TYPE_CODE (type) == TYPE_CODE_STRUCT
|| TYPE_CODE (type) == TYPE_CODE_UNION)
{
write_memory (sp + structoffset, VALUE_CONTENTS (arg), len);
store_address (val_buf, 4, sp + structoffset);
structoffset += round2 (len, 8);
}
else
{
memset (val_buf, 0, 4);
memcpy (val_buf, VALUE_CONTENTS (arg), len);
}
if (greg <= 10)
{
memcpy (&registers[REGISTER_BYTE (greg)], val_buf, 4);
greg++;
}
else
{
write_memory (sp + argoffset, val_buf, 4);
argoffset += 4;
}
}
else
{
if (len == 16
&& TYPE_CODE (type) == TYPE_CODE_ARRAY
&& TYPE_VECTOR (type))
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
char *v_val_buf = alloca (16);
memset (v_val_buf, 0, 16);
memcpy (v_val_buf, VALUE_CONTENTS (arg), len);
if (vreg <= 13)
{
memcpy (&registers[REGISTER_BYTE (tdep->ppc_vr0_regnum
+ vreg)],
v_val_buf, 16);
vreg++;
}
else
{
write_memory (sp + argoffset, v_val_buf, 16);
argoffset += 16;
}
}
}
}
target_store_registers (-1);
return sp;
}
/* ppc_linux_memory_remove_breakpoints attempts to remove a breakpoint
in much the same fashion as memory_remove_breakpoint in mem-break.c,
but is careful not to write back the previous contents if the code
@@ -886,3 +599,44 @@ ppc_linux_svr4_fetch_link_map_offsets (void)
return lmp;
}
static void
ppc_linux_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
/* Until November 2001, gcc was not complying to the SYSV ABI for
returning structures less than or equal to 8 bytes in size. It was
returning everything in memory. When this was corrected, it wasn't
fixed for native platforms. */
set_gdbarch_use_struct_convention (gdbarch,
ppc_sysv_abi_broken_use_struct_convention);
if (tdep->wordsize == 4)
{
/* Note: kevinb/2002-04-12: See note in rs6000_gdbarch_init regarding
*_push_arguments(). The same remarks hold for the methods below. */
set_gdbarch_frameless_function_invocation (gdbarch,
ppc_linux_frameless_function_invocation);
set_gdbarch_frame_chain (gdbarch, ppc_linux_frame_chain);
set_gdbarch_frame_saved_pc (gdbarch, ppc_linux_frame_saved_pc);
set_gdbarch_frame_init_saved_regs (gdbarch,
ppc_linux_frame_init_saved_regs);
set_gdbarch_init_extra_frame_info (gdbarch,
ppc_linux_init_extra_frame_info);
set_gdbarch_memory_remove_breakpoint (gdbarch,
ppc_linux_memory_remove_breakpoint);
set_solib_svr4_fetch_link_map_offsets
(gdbarch, ppc_linux_svr4_fetch_link_map_offsets);
}
}
void
_initialize_ppc_linux_tdep (void)
{
gdbarch_register_osabi (bfd_arch_powerpc, GDB_OSABI_LINUX,
ppc_linux_init_abi);
}