extern int target_big_endian;
/* The name of the readonly data section. */
-#define RDATA_SECTION_NAME (OUTPUT_FLAVOR == bfd_target_aout_flavour \
- ? ".data" \
- : OUTPUT_FLAVOR == bfd_target_ecoff_flavour \
+#define RDATA_SECTION_NAME (OUTPUT_FLAVOR == bfd_target_ecoff_flavour \
? ".rdata" \
: OUTPUT_FLAVOR == bfd_target_coff_flavour \
? ".rdata" \
#define HAVE_64BIT_OBJECTS (mips_abi == N64_ABI)
-/* We can only have 64bit addresses if the object file format
- supports it. */
+/* True if relocations are stored in-place. */
+#define HAVE_IN_PLACE_ADDENDS (!HAVE_NEWABI)
+
+/* We can only have 64bit addresses if the object file format supports it. */
#define HAVE_32BIT_ADDRESSES \
(HAVE_32BIT_GPRS \
- || ((bfd_arch_bits_per_address (stdoutput) == 32 \
- || ! HAVE_64BIT_OBJECTS) \
- && mips_pic != EMBEDDED_PIC))
+ || (bfd_arch_bits_per_address (stdoutput) == 32 \
+ || ! HAVE_64BIT_OBJECTS)) \
#define HAVE_64BIT_ADDRESSES (! HAVE_32BIT_ADDRESSES)
|| mips_opts.arch == CPU_R10000 \
|| mips_opts.arch == CPU_R12000 \
|| mips_opts.arch == CPU_RM7000 \
- || mips_opts.arch == CPU_SB1 \
|| mips_opts.arch == CPU_VR5500 \
)
level I. */
#define gpr_interlocks \
(mips_opts.isa != ISA_MIPS1 \
- || mips_opts.arch == CPU_VR5400 \
- || mips_opts.arch == CPU_VR5500 \
|| mips_opts.arch == CPU_R3900)
/* Whether the processor uses hardware interlocks to avoid delays
&& mips_opts.isa != ISA_MIPS2 \
&& mips_opts.isa != ISA_MIPS3) \
|| mips_opts.arch == CPU_R4300 \
- || mips_opts.arch == CPU_VR5400 \
- || mips_opts.arch == CPU_VR5500 \
- || mips_opts.arch == CPU_SB1 \
)
/* Whether the processor uses hardware interlocks to protect reads
16, 17, 2, 3, 4, 5, 6, 7
};
-static int mips_fix_4122_bugs;
+static int mips_fix_vr4120;
/* We don't relax branches by default, since this causes us to expand
`la .l2 - .l1' if there's a branch between .l1 and .l2, because we
{
switch (OUTPUT_FLAVOR)
{
- case bfd_target_aout_flavour:
- return target_big_endian ? "a.out-mips-big" : "a.out-mips-little";
case bfd_target_ecoff_flavour:
return target_big_endian ? "ecoff-bigmips" : ECOFF_LITTLE_FORMAT;
case bfd_target_coff_flavour:
/* set the default alignment for the text section (2**2) */
record_alignment (text_section, 2);
- if (USE_GLOBAL_POINTER_OPT)
- bfd_set_gp_size (stdoutput, g_switch_value);
+ bfd_set_gp_size (stdoutput, g_switch_value);
if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
{
static inline bfd_boolean
reloc_needs_lo_p (bfd_reloc_code_real_type reloc)
{
- return (reloc == BFD_RELOC_HI16_S
- || reloc == BFD_RELOC_MIPS_GOT16);
+ return (HAVE_IN_PLACE_ADDENDS
+ && (reloc == BFD_RELOC_HI16_S
+ || reloc == BFD_RELOC_MIPS_GOT16));
}
/* Return true if the given fixup is followed by a matching R_MIPS_LO16
if (prev_prev_nop && nops == 0)
++nops;
- if (mips_fix_4122_bugs && prev_insn.insn_mo->name)
+ if (mips_fix_vr4120 && prev_insn.insn_mo->name)
{
/* We're out of bits in pinfo, so we must resort to string
ops here. Shortcuts are selected based on opcodes being
- limited to the VR4122 instruction set. */
+ limited to the VR4120 instruction set. */
int min_nops = 0;
const char *pn = prev_insn.insn_mo->name;
const char *tn = ip->insn_mo->name;
- if (strncmp(pn, "macc", 4) == 0
- || strncmp(pn, "dmacc", 5) == 0)
+ if (strncmp (pn, "macc", 4) == 0
+ || strncmp (pn, "dmacc", 5) == 0)
{
/* Errata 21 - [D]DIV[U] after [D]MACC */
if (strstr (tn, "div"))
- {
- min_nops = 1;
- }
+ min_nops = 1;
- /* Errata 23 - Continuous DMULT[U]/DMACC instructions */
- if (pn[0] == 'd' /* dmacc */
- && (strncmp(tn, "dmult", 5) == 0
- || strncmp(tn, "dmacc", 5) == 0))
- {
- min_nops = 1;
- }
+ /* VR4181A errata MD(1): "If a MULT, MULTU, DMULT or DMULTU
+ instruction is executed immediately after a MACC or
+ DMACC instruction, the result of [either instruction]
+ is incorrect." */
+ if (strncmp (tn, "mult", 4) == 0
+ || strncmp (tn, "dmult", 5) == 0)
+ min_nops = 1;
+
+ /* Errata 23 - Continuous DMULT[U]/DMACC instructions.
+ Applies on top of VR4181A MD(1) errata. */
+ if (pn[0] == 'd' && strncmp (tn, "dmacc", 5) == 0)
+ min_nops = 1;
/* Errata 24 - MT{LO,HI} after [D]MACC */
if (strcmp (tn, "mtlo") == 0
|| strcmp (tn, "mthi") == 0)
- {
- min_nops = 1;
- }
-
+ min_nops = 1;
}
- else if (strncmp(pn, "dmult", 5) == 0
- && (strncmp(tn, "dmult", 5) == 0
- || strncmp(tn, "dmacc", 5) == 0))
+ else if (strncmp (pn, "dmult", 5) == 0
+ && (strncmp (tn, "dmult", 5) == 0
+ || strncmp (tn, "dmacc", 5) == 0))
{
/* Here is the rest of errata 23. */
min_nops = 1;
}
+ else if ((strncmp (pn, "dmult", 5) == 0 || strstr (pn, "div"))
+ && (strncmp (tn, "macc", 4) == 0
+ || strncmp (tn, "dmacc", 5) == 0))
+ {
+ /* VR4181A errata MD(4): "If a MACC or DMACC instruction is
+ executed immediately after a DMULT, DMULTU, DIV, DIVU,
+ DDIV or DDIVU instruction, the result of the MACC or
+ DMACC instruction is incorrect.". This partly overlaps
+ the workaround for errata 23. */
+ min_nops = 1;
+ }
if (nops < min_nops)
nops = min_nops;
}
}
fixp[0] = fixp[1] = fixp[2] = NULL;
- if (address_expr != NULL && *reloc_type < BFD_RELOC_UNUSED)
+ if (address_expr != NULL && *reloc_type <= BFD_RELOC_UNUSED)
{
if (address_expr->X_op == O_constant)
{
ip->insn_opcode |= (address_expr->X_add_number >> 16) & 0xffff;
break;
+ case BFD_RELOC_UNUSED:
case BFD_RELOC_LO16:
case BFD_RELOC_MIPS_GOT_DISP:
ip->insn_opcode |= address_expr->X_add_number & 0xffff;
internalError ();
}
}
- else
+ else if (*reloc_type < BFD_RELOC_UNUSED)
need_reloc:
{
reloc_howto_type *howto;
md_number_to_chars (f, ip->insn_opcode >> 16, 2);
md_number_to_chars (f + 2, ip->insn_opcode & 0xffff, 2);
#ifdef OBJ_ELF
- dwarf2_emit_insn (4);
+ /* The value passed to dwarf2_emit_insn is the distance between
+ the end of the current instruction and the address that should
+ be recorded in the debug tables. Since we want to use ISA-encoded
+ addresses in MIPS16 debug info, the value is one byte less than
+ the real instruction length. */
+ dwarf2_emit_insn (3);
#endif
}
else
}
md_number_to_chars (f, ip->insn_opcode, 2);
#ifdef OBJ_ELF
- dwarf2_emit_insn (ip->use_extend ? 4 : 2);
+ dwarf2_emit_insn (ip->use_extend ? 3 : 1);
#endif
}
|| (mips_opts.mips16
&& (pinfo & MIPS16_INSN_WRITE_31)
&& insn_uses_reg (&prev_insn, RA, MIPS_GR_REG))
- /* If we are generating embedded PIC code, the branch
- might be expanded into a sequence which uses $at, so
- we can't swap with an instruction which reads it. */
- || (mips_pic == EMBEDDED_PIC
- && insn_uses_reg (&prev_insn, AT, MIPS_GR_REG))
/* If the previous previous instruction has a load
delay, and sets a register that the branch reads, we
can not swap. */
prev_insn_reloc_type[1] = BFD_RELOC_UNUSED;
prev_insn_reloc_type[2] = BFD_RELOC_UNUSED;
prev_insn_extended = 0;
+ prev_insn_is_delay_slot = 1;
}
else
{
++nops;
}
- if (mips_fix_4122_bugs && prev_insn.insn_mo->name)
+ if (mips_fix_vr4120 && prev_insn.insn_mo->name)
{
int min_nops = 0;
const char *pn = prev_insn.insn_mo->name;
- if (strncmp(pn, "macc", 4) == 0
- || strncmp(pn, "dmacc", 5) == 0
- || strncmp(pn, "dmult", 5) == 0)
- {
- min_nops = 1;
- }
+ if (strncmp (pn, "macc", 4) == 0
+ || strncmp (pn, "dmacc", 5) == 0
+ || strncmp (pn, "dmult", 5) == 0
+ || strstr (pn, "div"))
+ min_nops = 1;
if (nops < min_nops)
nops = min_nops;
}
|| *r == BFD_RELOC_MIPS_GOT_PAGE
|| *r == BFD_RELOC_MIPS_GOT_OFST
|| *r == BFD_RELOC_MIPS_GOT_LO16
- || *r == BFD_RELOC_MIPS_CALL_LO16
- || (ep->X_op == O_subtract
- && *r == BFD_RELOC_PCREL_LO16));
+ || *r == BFD_RELOC_MIPS_CALL_LO16);
continue;
case 'u':
|| *r == BFD_RELOC_HI16
|| *r == BFD_RELOC_GPREL16
|| *r == BFD_RELOC_MIPS_GOT_HI16
- || *r == BFD_RELOC_MIPS_CALL_HI16))
- || (ep->X_op == O_subtract
- && *r == BFD_RELOC_PCREL_HI16_S)));
+ || *r == BFD_RELOC_MIPS_CALL_HI16))));
continue;
case 'p':
macro_build (&lo32, "ori", "t,r,i", reg, freg, BFD_RELOC_LO16);
}
+static inline void
+load_delay_nop (void)
+{
+ if (!gpr_interlocks)
+ macro_build (NULL, "nop", "");
+}
+
/* Load an address into a register. */
static void
ep->X_add_number = 0;
macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg,
BFD_RELOC_MIPS_GOT16, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
relax_start (ep->X_add_symbol);
relax_switch ();
macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg,
}
macro_build (ep, ADDRESS_LOAD_INSN, "t,o(b)", reg,
BFD_RELOC_MIPS_GOT16, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j", reg, reg,
BFD_RELOC_LO16);
relax_end ();
}
}
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- /* We always do
- addiu $reg,$gp,<sym> (BFD_RELOC_GPREL16)
- */
- macro_build (ep, ADDRESS_ADDI_INSN, "t,r,j",
- reg, mips_gp_register, BFD_RELOC_GPREL16);
- }
else
abort ();
}
}
/* Emit an SVR4 PIC sequence to load address LOCAL into DEST, where
- LOCAL is the sum of a symbol and a 16-bit displacement. The two
- alternatives are:
+ LOCAL is the sum of a symbol and a 16-bit or 32-bit displacement.
+ The two alternatives are:
Global symbol Local sybmol
------------- ------------
addiu DEST,DEST,OFFSET addiu DEST,DEST,%lo(SYMBOL + OFFSET)
load_got_offset emits the first instruction and add_got_offset
- emits the second. */
+ emits the second for a 16-bit offset or add_got_offset_hilo emits
+ a sequence to add a 32-bit offset using a scratch register. */
static void
load_got_offset (int dest, expressionS *local)
relax_end ();
}
+static void
+add_got_offset_hilo (int dest, expressionS *local, int tmp)
+{
+ expressionS global;
+ int hold_mips_optimize;
+
+ global.X_op = O_constant;
+ global.X_op_symbol = NULL;
+ global.X_add_symbol = NULL;
+ global.X_add_number = local->X_add_number;
+
+ relax_start (local->X_add_symbol);
+ load_register (tmp, &global, HAVE_64BIT_ADDRESSES);
+ relax_switch ();
+ /* Set mips_optimize around the lui instruction to avoid
+ inserting an unnecessary nop after the lw. */
+ hold_mips_optimize = mips_optimize;
+ mips_optimize = 2;
+ macro_build_lui (&global, tmp);
+ mips_optimize = hold_mips_optimize;
+ macro_build (local, ADDRESS_ADDI_INSN, "t,r,j", tmp, tmp, BFD_RELOC_LO16);
+ relax_end ();
+
+ macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dest, dest, tmp);
+}
+
/*
* Build macros
* This routine implements the seemingly endless macro or synthesized
macro_build (NULL, "break", "c", 7);
}
expr1.X_add_number = -1;
- macro_build (&expr1, dbl ? "daddiu" : "addiu", "t,r,j", AT, 0,
- BFD_RELOC_LO16);
+ load_register (AT, &expr1, dbl);
expr1.X_add_number = mips_trap ? (dbl ? 12 : 8) : (dbl ? 20 : 16);
macro_build (&expr1, "bne", "s,t,p", treg, AT);
if (dbl)
{
expr1.X_add_number = 1;
- macro_build (&expr1, "daddiu", "t,r,j", AT, 0, BFD_RELOC_LO16);
+ load_register (AT, &expr1, dbl);
macro_build (NULL, "dsll32", "d,w,<", AT, AT, 31);
}
else
used_at = 0;
}
- /* When generating embedded PIC code, we permit expressions of
- the form
- la $treg,foo-bar
- la $treg,foo-bar($breg)
- where bar is an address in the current section. These are used
- when getting the addresses of functions. We don't permit
- X_add_number to be non-zero, because if the symbol is
- external the relaxing code needs to know that any addend is
- purely the offset to X_op_symbol. */
- if (mips_pic == EMBEDDED_PIC
- && offset_expr.X_op == O_subtract
- && (symbol_constant_p (offset_expr.X_op_symbol)
- ? S_GET_SEGMENT (offset_expr.X_op_symbol) == now_seg
- : (symbol_equated_p (offset_expr.X_op_symbol)
- && (S_GET_SEGMENT
- (symbol_get_value_expression (offset_expr.X_op_symbol)
- ->X_add_symbol)
- == now_seg)))
- && (offset_expr.X_add_number == 0
- || OUTPUT_FLAVOR == bfd_target_elf_flavour))
- {
- if (breg == 0)
- {
- tempreg = treg;
- used_at = 0;
- macro_build (&offset_expr, "lui", "t,u",
- tempreg, BFD_RELOC_PCREL_HI16_S);
- }
- else
- {
- macro_build (&offset_expr, "lui", "t,u",
- tempreg, BFD_RELOC_PCREL_HI16_S);
- macro_build (NULL,
- (dbl || HAVE_64BIT_ADDRESSES) ? "daddu" : "addu",
- "d,v,t", tempreg, tempreg, breg);
- }
- macro_build (&offset_expr,
- (dbl || HAVE_64BIT_ADDRESSES) ? "daddiu" : "addiu",
- "t,r,j", treg, tempreg, BFD_RELOC_PCREL_LO16);
- if (! used_at)
- return;
- break;
- }
-
if (offset_expr.X_op != O_symbol
&& offset_expr.X_op != O_constant)
{
if (offset_expr.X_op == O_constant)
load_register (tempreg, &offset_expr,
- ((mips_pic == EMBEDDED_PIC || mips_pic == NO_PIC)
+ (mips_pic == NO_PIC
? (dbl || HAVE_64BIT_ADDRESSES)
: HAVE_64BIT_ADDRESSES));
else if (mips_pic == NO_PIC)
/* We're going to put in an addu instruction using
tempreg, so we may as well insert the nop right
now. */
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
}
relax_switch ();
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)",
tempreg, BFD_RELOC_MIPS_GOT16, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j",
tempreg, tempreg, BFD_RELOC_LO16);
relax_end ();
&& offset_expr.X_add_number < 0x8000)
{
load_got_offset (tempreg, &offset_expr);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
add_got_offset (tempreg, &offset_expr);
}
else
offset_expr.X_add_number =
((offset_expr.X_add_number + 0x8000) & 0xffff) - 0x8000;
load_got_offset (tempreg, &offset_expr);
+ offset_expr.X_add_number = expr1.X_add_number;
/* If we are going to add in a base register, and the
target register and the base register are the same,
then we are using AT as a temporary register. Since
not using a base register. */
if (breg == treg)
{
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
treg, AT, breg);
breg = 0;
tempreg = treg;
}
-
- /* Set mips_optimize around the lui instruction to avoid
- inserting an unnecessary nop after the lw. */
- hold_mips_optimize = mips_optimize;
- mips_optimize = 2;
- macro_build_lui (&expr1, AT);
- mips_optimize = hold_mips_optimize;
-
- add_got_offset (AT, &offset_expr);
- macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
- tempreg, tempreg, AT);
+ add_got_offset_hilo (tempreg, &offset_expr, AT);
used_at = 1;
}
}
add_breg_early = 1;
}
- macro_build_lui (&expr1, AT);
- macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j",
- AT, AT, BFD_RELOC_LO16);
+ load_register (AT, &expr1, HAVE_64BIT_ADDRESSES);
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
dreg, dreg, AT);
/* We're going to put in an addu instruction using
tempreg, so we may as well insert the nop right
now. */
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
}
}
else if (expr1.X_add_number >= -0x8000
&& expr1.X_add_number < 0x8000)
{
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j",
tempreg, tempreg, BFD_RELOC_LO16);
}
else
{
assert (tempreg == AT);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
treg, AT, breg);
dreg = treg;
}
- /* Set mips_optimize around the lui instruction to avoid
- inserting an unnecessary nop after the lw. */
- hold_mips_optimize = mips_optimize;
- mips_optimize = 2;
- macro_build_lui (&expr1, AT);
- mips_optimize = hold_mips_optimize;
-
- macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j",
- AT, AT, BFD_RELOC_LO16);
+ load_register (AT, &expr1, HAVE_64BIT_ADDRESSES);
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT);
used_at = 1;
if (expr1.X_add_number >= -0x8000
&& expr1.X_add_number < 0x8000)
{
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j",
tempreg, tempreg, BFD_RELOC_LO16);
/* FIXME: If add_number is 0, and there was no base
/* We must add in the base register now, as in the
external symbol case. */
assert (tempreg == AT);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
treg, AT, breg);
tempreg = treg;
add_breg_early = 1;
}
- /* Set mips_optimize around the lui instruction to avoid
- inserting an unnecessary nop after the lw. */
- macro_build_lui (&expr1, AT);
- macro_build (&expr1, ADDRESS_ADDI_INSN, "t,r,j",
- AT, AT, BFD_RELOC_LO16);
+ load_register (AT, &expr1, HAVE_64BIT_ADDRESSES);
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", dreg, dreg, AT);
used_at = 1;
}
relax_end ();
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- /* We use
- addiu $tempreg,$gp,<sym> (BFD_RELOC_GPREL16)
- */
- macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg,
- mips_gp_register, BFD_RELOC_GPREL16);
- }
else
abort ();
{
char *s;
- if (mips_pic == EMBEDDED_PIC || mips_pic == NO_PIC)
+ if (mips_pic == NO_PIC)
s = (dbl || HAVE_64BIT_ADDRESSES) ? "daddu" : "addu";
else
s = ADDRESS_ADD_INSN;
dreg = RA;
/* Fall through. */
case M_JAL_2:
- if (mips_pic == NO_PIC
- || mips_pic == EMBEDDED_PIC)
+ if (mips_pic == NO_PIC)
macro_build (NULL, "jalr", "d,s", dreg, sreg);
else if (mips_pic == SVR4_PIC)
{
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)",
PIC_CALL_REG, BFD_RELOC_MIPS_CALL16,
mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
relax_switch ();
}
else
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)",
PIC_CALL_REG, BFD_RELOC_MIPS_CALL_LO16,
PIC_CALL_REG);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
relax_switch ();
if (gpdelay)
macro_build (NULL, "nop", "");
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)",
PIC_CALL_REG, BFD_RELOC_MIPS_GOT16,
mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j",
PIC_CALL_REG, PIC_CALL_REG, BFD_RELOC_LO16);
relax_end ();
}
}
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- macro_build (&offset_expr, "bal", "p");
- /* The linker may expand the call to a longer sequence which
- uses $at, so we must break rather than return. */
- break;
- }
else
abort ();
^ 0x80000000) - 0x80000000);
}
- /* For embedded PIC, we allow loads where the offset is calculated
- by subtracting a symbol in the current segment from an unknown
- symbol, relative to a base register, e.g.:
- <op> $treg, <sym>-<localsym>($breg)
- This is used by the compiler for switch statements. */
- if (mips_pic == EMBEDDED_PIC
- && offset_expr.X_op == O_subtract
- && (symbol_constant_p (offset_expr.X_op_symbol)
- ? S_GET_SEGMENT (offset_expr.X_op_symbol) == now_seg
- : (symbol_equated_p (offset_expr.X_op_symbol)
- && (S_GET_SEGMENT
- (symbol_get_value_expression (offset_expr.X_op_symbol)
- ->X_add_symbol)
- == now_seg)))
- && breg != 0
- && (offset_expr.X_add_number == 0
- || OUTPUT_FLAVOR == bfd_target_elf_flavour))
- {
- /* For this case, we output the instructions:
- lui $tempreg,<sym> (BFD_RELOC_PCREL_HI16_S)
- addiu $tempreg,$tempreg,$breg
- <op> $treg,<sym>($tempreg) (BFD_RELOC_PCREL_LO16)
- If the relocation would fit entirely in 16 bits, it would be
- nice to emit:
- <op> $treg,<sym>($breg) (BFD_RELOC_PCREL_LO16)
- instead, but that seems quite difficult. */
- macro_build (&offset_expr, "lui", "t,u", tempreg,
- BFD_RELOC_PCREL_HI16_S);
- macro_build (NULL,
- ((bfd_arch_bits_per_address (stdoutput) == 32
- || ! ISA_HAS_64BIT_REGS (mips_opts.isa))
- ? "addu" : "daddu"),
- "d,v,t", tempreg, tempreg, breg);
- macro_build (&offset_expr, s, fmt, treg,
- BFD_RELOC_PCREL_LO16, tempreg);
- if (! used_at)
- return;
- break;
- }
-
if (offset_expr.X_op != O_constant
&& offset_expr.X_op != O_symbol)
{
as_bad (_("PIC code offset overflow (max 16 signed bits)"));
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg,
lw_reloc_type, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
relax_start (offset_expr.X_add_symbol);
relax_switch ();
macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg,
macro_build (NULL, "nop", "");
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", tempreg,
BFD_RELOC_MIPS_GOT16, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", tempreg,
tempreg, BFD_RELOC_LO16);
relax_end ();
BFD_RELOC_MIPS_GOT_OFST, tempreg);
relax_end ();
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- /* If there is no base register, we want
- <op> $treg,<sym>($gp) (BFD_RELOC_GPREL16)
- If there is a base register, we want
- addu $tempreg,$breg,$gp
- <op> $treg,<sym>($tempreg) (BFD_RELOC_GPREL16)
- */
- assert (offset_expr.X_op == O_symbol);
- if (breg == 0)
- {
- macro_build (&offset_expr, s, fmt, treg, BFD_RELOC_GPREL16,
- mips_gp_register);
- used_at = 0;
- }
- else
- {
- macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
- tempreg, breg, mips_gp_register);
- macro_build (&offset_expr, s, fmt, treg,
- BFD_RELOC_GPREL16, tempreg);
- }
- }
else
abort ();
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT,
BFD_RELOC_MIPS_GOT16, mips_gp_register);
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- /* For embedded PIC we pick up the entire address off $gp in
- a single instruction. */
- macro_build (&offset_expr, ADDRESS_ADDI_INSN, "t,r,j", AT,
- mips_gp_register, BFD_RELOC_GPREL16);
- offset_expr.X_op = O_constant;
- offset_expr.X_add_number = 0;
- }
else
abort ();
fmt = "t,o(b)";
ldd_std:
- /* We do _not_ bother to allow embedded PIC (symbol-local_symbol)
- loads for the case of doing a pair of loads to simulate an 'ld'.
- This is not currently done by the compiler, and assembly coders
- writing embedded-pic code can cope. */
-
if (offset_expr.X_op != O_symbol
&& offset_expr.X_op != O_constant)
{
|| expr1.X_add_number >= 0x8000 - 4)
as_bad (_("PIC code offset overflow (max 16 signed bits)"));
load_got_offset (AT, &offset_expr);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
if (breg != 0)
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT);
AT, AT, mips_gp_register);
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)",
AT, BFD_RELOC_MIPS_GOT_LO16, AT);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
if (breg != 0)
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT);
/* Itbl support may require additional care here. */
macro_build (NULL, "nop", "");
macro_build (&offset_expr, ADDRESS_LOAD_INSN, "t,o(b)", AT,
BFD_RELOC_MIPS_GOT16, mips_gp_register);
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
if (breg != 0)
macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t", AT, breg, AT);
/* Itbl support may require additional care here. */
mips_optimize = hold_mips_optimize;
relax_end ();
}
- else if (mips_pic == EMBEDDED_PIC)
- {
- /* If there is no base register, we use
- <op> $treg,<sym>($gp) (BFD_RELOC_GPREL16)
- <op> $treg+1,<sym>+4($gp) (BFD_RELOC_GPREL16)
- If we have a base register, we use
- addu $at,$breg,$gp
- <op> $treg,<sym>($at) (BFD_RELOC_GPREL16)
- <op> $treg+1,<sym>+4($at) (BFD_RELOC_GPREL16)
- */
- if (breg == 0)
- {
- tempreg = mips_gp_register;
- used_at = 0;
- }
- else
- {
- macro_build (NULL, ADDRESS_ADD_INSN, "d,v,t",
- AT, breg, mips_gp_register);
- tempreg = AT;
- used_at = 1;
- }
-
- /* Itbl support may require additional care here. */
- macro_build (&offset_expr, s, fmt, coproc ? treg + 1 : treg,
- BFD_RELOC_GPREL16, tempreg);
- offset_expr.X_add_number += 4;
- /* Itbl support may require additional care here. */
- macro_build (&offset_expr, s, fmt, coproc ? treg : treg + 1,
- BFD_RELOC_GPREL16, tempreg);
- }
else
abort ();
if (treg == tempreg)
return;
/* Protect second load's delay slot. */
- if (!gpr_interlocks)
- macro_build (NULL, "nop", "");
+ load_delay_nop ();
move_register (treg, tempreg);
break;
ip->insn_opcode |= (imm_expr.X_add_number
<< (OP_SH_VSEL +
(is_qh ? 2 : 1)));
+ imm_expr.X_op = O_absent;
if (*s != ']')
as_warn(_("Expecting ']' found '%s'"), s);
else
The .lit4 and .lit8 sections are only used if
permitted by the -G argument.
- When generating embedded PIC code, we use the
- .lit8 section but not the .lit4 section (we can do
- .lit4 inline easily; we need to put .lit8
- somewhere in the data segment, and using .lit8
- permits the linker to eventually combine identical
- .lit8 entries).
-
The code below needs to know whether the target register
is 32 or 64 bits wide. It relies on the fact 'f' and
'F' are used with GPR-based instructions and 'l' and
if (*args == 'f'
|| (*args == 'l'
- && (! USE_GLOBAL_POINTER_OPT
- || mips_pic == EMBEDDED_PIC
- || g_switch_value < 4
+ && (g_switch_value < 4
|| (temp[0] == 0 && temp[1] == 0)
|| (temp[2] == 0 && temp[3] == 0))))
{
default: /* unused default case avoids warnings. */
case 'L':
newname = RDATA_SECTION_NAME;
- if ((USE_GLOBAL_POINTER_OPT && g_switch_value >= 8)
- || mips_pic == EMBEDDED_PIC)
+ if (g_switch_value >= 8)
newname = ".lit8";
break;
case 'F':
- if (mips_pic == EMBEDDED_PIC)
- newname = ".lit8";
- else
- newname = RDATA_SECTION_NAME;
+ newname = RDATA_SECTION_NAME;
break;
case 'l':
- assert (!USE_GLOBAL_POINTER_OPT
- || g_switch_value >= 4);
+ assert (g_switch_value >= 4);
newname = ".lit4";
break;
}
{
as_bad ("relocation %s isn't supported by the current ABI",
percent_op[i].str);
- *reloc = BFD_RELOC_LO16;
+ *reloc = BFD_RELOC_UNUSED;
}
return TRUE;
}
expression in *EP and the relocations in the array starting
at RELOC. Return the number of relocation operators used.
- On exit, EXPR_END points to the first character after the expression.
- If no relocation operators are used, RELOC[0] is set to BFD_RELOC_LO16. */
+ On exit, EXPR_END points to the first character after the expression. */
static size_t
my_getSmallExpression (expressionS *ep, bfd_reloc_code_real_type *reloc,
expr_end = str;
- if (reloc_index == 0)
- reloc[0] = BFD_RELOC_LO16;
- else
+ if (reloc_index != 0)
{
prev_reloc_op_frag = frag_now;
for (i = 0; i < reloc_index; i++)
#define OPTION_MNO_7000_HILO_FIX (OPTION_FIX_BASE + 1)
{"no-fix-7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX},
{"mno-fix7000", no_argument, NULL, OPTION_MNO_7000_HILO_FIX},
-#define OPTION_FIX_VR4122 (OPTION_FIX_BASE + 2)
-#define OPTION_NO_FIX_VR4122 (OPTION_FIX_BASE + 3)
- {"mfix-vr4122-bugs", no_argument, NULL, OPTION_FIX_VR4122},
- {"no-mfix-vr4122-bugs", no_argument, NULL, OPTION_NO_FIX_VR4122},
+#define OPTION_FIX_VR4120 (OPTION_FIX_BASE + 2)
+#define OPTION_NO_FIX_VR4120 (OPTION_FIX_BASE + 3)
+ {"mfix-vr4120", no_argument, NULL, OPTION_FIX_VR4120},
+ {"mno-fix-vr4120", no_argument, NULL, OPTION_NO_FIX_VR4120},
/* Miscellaneous options. */
#define OPTION_MISC_BASE (OPTION_FIX_BASE + 4)
-#define OPTION_MEMBEDDED_PIC (OPTION_MISC_BASE + 0)
- {"membedded-pic", no_argument, NULL, OPTION_MEMBEDDED_PIC},
-#define OPTION_TRAP (OPTION_MISC_BASE + 1)
+#define OPTION_TRAP (OPTION_MISC_BASE + 0)
{"trap", no_argument, NULL, OPTION_TRAP},
{"no-break", no_argument, NULL, OPTION_TRAP},
-#define OPTION_BREAK (OPTION_MISC_BASE + 2)
+#define OPTION_BREAK (OPTION_MISC_BASE + 1)
{"break", no_argument, NULL, OPTION_BREAK},
{"no-trap", no_argument, NULL, OPTION_BREAK},
-#define OPTION_EB (OPTION_MISC_BASE + 3)
+#define OPTION_EB (OPTION_MISC_BASE + 2)
{"EB", no_argument, NULL, OPTION_EB},
-#define OPTION_EL (OPTION_MISC_BASE + 4)
+#define OPTION_EL (OPTION_MISC_BASE + 3)
{"EL", no_argument, NULL, OPTION_EL},
-#define OPTION_FP32 (OPTION_MISC_BASE + 5)
+#define OPTION_FP32 (OPTION_MISC_BASE + 4)
{"mfp32", no_argument, NULL, OPTION_FP32},
-#define OPTION_GP32 (OPTION_MISC_BASE + 6)
+#define OPTION_GP32 (OPTION_MISC_BASE + 5)
{"mgp32", no_argument, NULL, OPTION_GP32},
-#define OPTION_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 7)
+#define OPTION_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 6)
{"construct-floats", no_argument, NULL, OPTION_CONSTRUCT_FLOATS},
-#define OPTION_NO_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 8)
+#define OPTION_NO_CONSTRUCT_FLOATS (OPTION_MISC_BASE + 7)
{"no-construct-floats", no_argument, NULL, OPTION_NO_CONSTRUCT_FLOATS},
-#define OPTION_FP64 (OPTION_MISC_BASE + 9)
+#define OPTION_FP64 (OPTION_MISC_BASE + 8)
{"mfp64", no_argument, NULL, OPTION_FP64},
-#define OPTION_GP64 (OPTION_MISC_BASE + 10)
+#define OPTION_GP64 (OPTION_MISC_BASE + 9)
{"mgp64", no_argument, NULL, OPTION_GP64},
-#define OPTION_RELAX_BRANCH (OPTION_MISC_BASE + 11)
-#define OPTION_NO_RELAX_BRANCH (OPTION_MISC_BASE + 12)
+#define OPTION_RELAX_BRANCH (OPTION_MISC_BASE + 10)
+#define OPTION_NO_RELAX_BRANCH (OPTION_MISC_BASE + 11)
{"relax-branch", no_argument, NULL, OPTION_RELAX_BRANCH},
{"no-relax-branch", no_argument, NULL, OPTION_NO_RELAX_BRANCH},
/* ELF-specific options. */
#ifdef OBJ_ELF
-#define OPTION_ELF_BASE (OPTION_MISC_BASE + 13)
+#define OPTION_ELF_BASE (OPTION_MISC_BASE + 12)
#define OPTION_CALL_SHARED (OPTION_ELF_BASE + 0)
{"KPIC", no_argument, NULL, OPTION_CALL_SHARED},
{"call_shared", no_argument, NULL, OPTION_CALL_SHARED},
mips_opts.ase_mips3d = 0;
break;
- case OPTION_MEMBEDDED_PIC:
- mips_pic = EMBEDDED_PIC;
- if (USE_GLOBAL_POINTER_OPT && g_switch_seen)
- {
- as_bad (_("-G may not be used with embedded PIC code"));
- return 0;
- }
- g_switch_value = 0x7fffffff;
- break;
-
- case OPTION_FIX_VR4122:
- mips_fix_4122_bugs = 1;
+ case OPTION_FIX_VR4120:
+ mips_fix_vr4120 = 1;
break;
- case OPTION_NO_FIX_VR4122:
- mips_fix_4122_bugs = 0;
+ case OPTION_NO_FIX_VR4120:
+ mips_fix_vr4120 = 0;
break;
case OPTION_RELAX_BRANCH:
#endif /* OBJ_ELF */
case 'G':
- if (! USE_GLOBAL_POINTER_OPT)
+ if (mips_pic == SVR4_PIC)
{
- as_bad (_("-G is not supported for this configuration"));
- return 0;
- }
- else if (mips_pic == SVR4_PIC || mips_pic == EMBEDDED_PIC)
- {
- as_bad (_("-G may not be used with SVR4 or embedded PIC code"));
+ as_bad (_("-G may not be used with SVR4 PIC code"));
return 0;
}
else
#endif
}
-/* Sort any unmatched HI16_S relocs so that they immediately precede
- the corresponding LO reloc. This is called before md_apply_fix3 and
- tc_gen_reloc. Unmatched HI16_S relocs can only be generated by
- explicit use of the %hi modifier. */
+/* Sort any unmatched HI16 and GOT16 relocs so that they immediately precede
+ the corresponding LO16 reloc. This is called before md_apply_fix3 and
+ tc_gen_reloc. Unmatched relocs can only be generated by use of explicit
+ relocation operators.
+
+ For our purposes, a %lo() expression matches a %got() or %hi()
+ expression if:
+
+ (a) it refers to the same symbol; and
+ (b) the offset applied in the %lo() expression is no lower than
+ the offset applied in the %got() or %hi().
+
+ (b) allows us to cope with code like:
+
+ lui $4,%hi(foo)
+ lh $4,%lo(foo+2)($4)
+
+ ...which is legal on RELA targets, and has a well-defined behaviour
+ if the user knows that adding 2 to "foo" will not induce a carry to
+ the high 16 bits.
+
+ When several %lo()s match a particular %got() or %hi(), we use the
+ following rules to distinguish them:
+
+ (1) %lo()s with smaller offsets are a better match than %lo()s with
+ higher offsets.
+
+ (2) %lo()s with no matching %got() or %hi() are better than those
+ that already have a matching %got() or %hi().
+
+ (3) later %lo()s are better than earlier %lo()s.
+
+ These rules are applied in order.
+
+ (1) means, among other things, that %lo()s with identical offsets are
+ chosen if they exist.
+
+ (2) means that we won't associate several high-part relocations with
+ the same low-part relocation unless there's no alternative. Having
+ several high parts for the same low part is a GNU extension; this rule
+ allows careful users to avoid it.
+
+ (3) is purely cosmetic. mips_hi_fixup_list is is in reverse order,
+ with the last high-part relocation being at the front of the list.
+ It therefore makes sense to choose the last matching low-part
+ relocation, all other things being equal. It's also easier
+ to code that way. */
void
mips_frob_file (void)
for (l = mips_hi_fixup_list; l != NULL; l = l->next)
{
segment_info_type *seginfo;
- int pass;
+ bfd_boolean matched_lo_p;
+ fixS **hi_pos, **lo_pos, **pos;
assert (reloc_needs_lo_p (l->fixp->fx_r_type));
if (fixup_has_matching_lo_p (l->fixp))
continue;
- /* Look through the fixups for this segment for a matching %lo.
- When we find one, move the %hi just in front of it. We do
- this in two passes. In the first pass, we try to find a
- unique %lo. In the second pass, we permit multiple %hi
- relocs for a single %lo (this is a GNU extension). */
seginfo = seg_info (l->seg);
- for (pass = 0; pass < 2; pass++)
- {
- fixS *f, *prev;
- prev = NULL;
- for (f = seginfo->fix_root; f != NULL; f = f->fx_next)
+ /* Set HI_POS to the position of this relocation in the chain.
+ Set LO_POS to the position of the chosen low-part relocation.
+ MATCHED_LO_P is true on entry to the loop if *POS is a low-part
+ relocation that matches an immediately-preceding high-part
+ relocation. */
+ hi_pos = NULL;
+ lo_pos = NULL;
+ matched_lo_p = FALSE;
+ for (pos = &seginfo->fix_root; *pos != NULL; pos = &(*pos)->fx_next)
+ {
+ if (*pos == l->fixp)
+ hi_pos = pos;
+
+ if ((*pos)->fx_r_type == BFD_RELOC_LO16
+ && (*pos)->fx_addsy == l->fixp->fx_addsy
+ && (*pos)->fx_offset >= l->fixp->fx_offset
+ && (lo_pos == NULL
+ || (*pos)->fx_offset < (*lo_pos)->fx_offset
+ || (!matched_lo_p
+ && (*pos)->fx_offset == (*lo_pos)->fx_offset)))
+ lo_pos = pos;
+
+ matched_lo_p = (reloc_needs_lo_p ((*pos)->fx_r_type)
+ && fixup_has_matching_lo_p (*pos));
+ }
+
+ /* If we found a match, remove the high-part relocation from its
+ current position and insert it before the low-part relocation.
+ Make the offsets match so that fixup_has_matching_lo_p()
+ will return true.
+
+ We don't warn about unmatched high-part relocations since some
+ versions of gcc have been known to emit dead "lui ...%hi(...)"
+ instructions. */
+ if (lo_pos != NULL)
+ {
+ l->fixp->fx_offset = (*lo_pos)->fx_offset;
+ if (l->fixp->fx_next != *lo_pos)
{
- /* Check whether this is a %lo fixup which matches l->fixp. */
- if (f->fx_r_type == BFD_RELOC_LO16
- && f->fx_addsy == l->fixp->fx_addsy
- && f->fx_offset == l->fixp->fx_offset
- && (pass == 1
- || prev == NULL
- || !reloc_needs_lo_p (prev->fx_r_type)
- || !fixup_has_matching_lo_p (prev)))
- {
- fixS **pf;
-
- /* Move l->fixp before f. */
- for (pf = &seginfo->fix_root;
- *pf != l->fixp;
- pf = &(*pf)->fx_next)
- assert (*pf != NULL);
-
- *pf = l->fixp->fx_next;
-
- l->fixp->fx_next = f;
- if (prev == NULL)
- seginfo->fix_root = l->fixp;
- else
- prev->fx_next = l->fixp;
-
- break;
- }
-
- prev = f;
+ *hi_pos = l->fixp->fx_next;
+ l->fixp->fx_next = *lo_pos;
+ *lo_pos = l->fixp;
}
-
- if (f != NULL)
- break;
-
-#if 0 /* GCC code motion plus incomplete dead code elimination
- can leave a %hi without a %lo. */
- if (pass == 1)
- as_warn_where (l->fixp->fx_file, l->fixp->fx_line,
- _("Unmatched %%hi reloc"));
-#endif
}
}
}
-/* When generating embedded PIC code we need to use a special
- relocation to represent the difference of two symbols in the .text
- section (switch tables use a difference of this sort). See
- include/coff/mips.h for details. This macro checks whether this
- fixup requires the special reloc. */
-#define SWITCH_TABLE(fixp) \
- ((fixp)->fx_r_type == BFD_RELOC_32 \
- && OUTPUT_FLAVOR != bfd_target_elf_flavour \
- && (fixp)->fx_addsy != NULL \
- && (fixp)->fx_subsy != NULL \
- && S_GET_SEGMENT ((fixp)->fx_addsy) == text_section \
- && S_GET_SEGMENT ((fixp)->fx_subsy) == text_section)
-
-/* When generating embedded PIC code we must keep all PC relative
- relocations, in case the linker has to relax a call. We also need
- to keep relocations for switch table entries.
-
- We may have combined relocations without symbols in the N32/N64 ABI.
+/* We may have combined relocations without symbols in the N32/N64 ABI.
We have to prevent gas from dropping them. */
int
|| fixp->fx_r_type == BFD_RELOC_LO16))
return 1;
- return (mips_pic == EMBEDDED_PIC
- && (fixp->fx_pcrel
- || SWITCH_TABLE (fixp)
- || fixp->fx_r_type == BFD_RELOC_PCREL_HI16_S
- || fixp->fx_r_type == BFD_RELOC_PCREL_LO16));
+ return 0;
}
/* This hook is called before a fix is simplified. We don't really
whole function). */
if (fixP->fx_r_type == BFD_RELOC_16_PCREL_S2
- && (((OUTPUT_FLAVOR == bfd_target_ecoff_flavour
- || OUTPUT_FLAVOR == bfd_target_elf_flavour)
- && mips_pic != EMBEDDED_PIC)
+ && ((OUTPUT_FLAVOR == bfd_target_ecoff_flavour
+ || OUTPUT_FLAVOR == bfd_target_elf_flavour)
|| bfd_reloc_type_lookup (stdoutput, BFD_RELOC_16_PCREL_S2) == NULL)
&& fixP->fx_addsy)
{
buf = (bfd_byte *) (fixP->fx_frag->fr_literal + fixP->fx_where);
/* We are not done if this is a composite relocation to set up gp. */
- if (fixP->fx_addsy == NULL && ! fixP->fx_pcrel
+ assert (! fixP->fx_pcrel);
+ if (fixP->fx_addsy == NULL
&& !(fixP->fx_r_type == BFD_RELOC_MIPS_SUB
|| (fixP->fx_r_type == BFD_RELOC_64
&& (previous_fx_r_type == BFD_RELOC_GPREL32
case BFD_RELOC_MIPS_CALL_HI16:
case BFD_RELOC_MIPS_CALL_LO16:
case BFD_RELOC_MIPS16_GPREL:
- if (fixP->fx_pcrel)
- as_bad_where (fixP->fx_file, fixP->fx_line,
- _("Invalid PC relative reloc"));
+ assert (! fixP->fx_pcrel);
/* Nothing needed to do. The value comes from the reloc entry */
break;
*valP = 0;
break;
- case BFD_RELOC_PCREL_HI16_S:
- /* The addend for this is tricky if it is internal, so we just
- do everything here rather than in bfd_install_relocation. */
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour && !fixP->fx_done)
- break;
- if (fixP->fx_addsy
- && (symbol_get_bfdsym (fixP->fx_addsy)->flags & BSF_SECTION_SYM) == 0)
- {
- /* For an external symbol adjust by the address to make it
- pcrel_offset. We use the address of the RELLO reloc
- which follows this one. */
- *valP += (fixP->fx_next->fx_frag->fr_address
- + fixP->fx_next->fx_where);
- }
- *valP = ((*valP + 0x8000) >> 16) & 0xffff;
- if (target_big_endian)
- buf += 2;
- md_number_to_chars (buf, *valP, 2);
- break;
-
- case BFD_RELOC_PCREL_LO16:
- /* The addend for this is tricky if it is internal, so we just
- do everything here rather than in bfd_install_relocation. */
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour && !fixP->fx_done)
- break;
- if (fixP->fx_addsy
- && (symbol_get_bfdsym (fixP->fx_addsy)->flags & BSF_SECTION_SYM) == 0)
- *valP += fixP->fx_frag->fr_address + fixP->fx_where;
- if (target_big_endian)
- buf += 2;
- md_number_to_chars (buf, *valP, 2);
- break;
-
case BFD_RELOC_64:
/* This is handled like BFD_RELOC_32, but we output a sign
extended value if we are only 32 bits. */
- if (fixP->fx_done
- || (mips_pic == EMBEDDED_PIC && SWITCH_TABLE (fixP)))
+ if (fixP->fx_done)
{
if (8 <= sizeof (valueT))
md_number_to_chars (buf, *valP, 8);
case BFD_RELOC_32:
/* If we are deleting this reloc entry, we must fill in the
value now. This can happen if we have a .word which is not
- resolved when it appears but is later defined. We also need
- to fill in the value if this is an embedded PIC switch table
- entry. */
- if (fixP->fx_done
- || (mips_pic == EMBEDDED_PIC && SWITCH_TABLE (fixP)))
+ resolved when it appears but is later defined. */
+ if (fixP->fx_done)
md_number_to_chars (buf, *valP, 4);
break;
break;
case BFD_RELOC_LO16:
+ /* FIXME: Now that embedded-PIC is gone, some of this code/comment
+ may be safe to remove, but if so it's not obvious. */
/* When handling an embedded PIC switch statement, we can wind
up deleting a LO16 reloc. See the 'o' case in mips_ip. */
if (fixP->fx_done)
&& fixP->fx_done
&& fixP->fx_frag->fr_address >= text_section->vma
&& (fixP->fx_frag->fr_address
- < text_section->vma + text_section->_raw_size)
+ < text_section->vma + bfd_get_section_size (text_section))
&& ((insn & 0xffff0000) == 0x10000000 /* beq $0,$0 */
|| (insn & 0xffff0000) == 0x04010000 /* bgez $0 */
|| (insn & 0xffff0000) == 0x04110000)) /* bgezal $0 */
{
segT seg;
- /* When generating embedded PIC code, we only use the .text, .lit8,
- .sdata and .sbss sections. We change the .data and .rdata
- pseudo-ops to use .sdata. */
- if (mips_pic == EMBEDDED_PIC
- && (sec == 'd' || sec == 'r'))
- sec = 's';
-
#ifdef OBJ_ELF
/* The ELF backend needs to know that we are changing sections, so
that .previous works correctly. We could do something like check
break;
case 'r':
- if (USE_GLOBAL_POINTER_OPT)
- {
- seg = subseg_new (RDATA_SECTION_NAME,
- (subsegT) get_absolute_expression ());
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
- {
- bfd_set_section_flags (stdoutput, seg,
- (SEC_ALLOC
- | SEC_LOAD
- | SEC_READONLY
- | SEC_RELOC
- | SEC_DATA));
- if (strcmp (TARGET_OS, "elf") != 0)
- record_alignment (seg, 4);
- }
- demand_empty_rest_of_line ();
- }
- else
+ seg = subseg_new (RDATA_SECTION_NAME,
+ (subsegT) get_absolute_expression ());
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
{
- as_bad (_("No read only data section in this object file format"));
- demand_empty_rest_of_line ();
- return;
+ bfd_set_section_flags (stdoutput, seg, (SEC_ALLOC | SEC_LOAD
+ | SEC_READONLY | SEC_RELOC
+ | SEC_DATA));
+ if (strcmp (TARGET_OS, "elf") != 0)
+ record_alignment (seg, 4);
}
+ demand_empty_rest_of_line ();
break;
case 's':
- if (USE_GLOBAL_POINTER_OPT)
- {
- seg = subseg_new (".sdata", (subsegT) get_absolute_expression ());
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
- {
- bfd_set_section_flags (stdoutput, seg,
- SEC_ALLOC | SEC_LOAD | SEC_RELOC
- | SEC_DATA);
- if (strcmp (TARGET_OS, "elf") != 0)
- record_alignment (seg, 4);
- }
- demand_empty_rest_of_line ();
- break;
- }
- else
+ seg = subseg_new (".sdata", (subsegT) get_absolute_expression ());
+ if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
{
- as_bad (_("Global pointers not supported; recompile -G 0"));
- demand_empty_rest_of_line ();
- return;
+ bfd_set_section_flags (stdoutput, seg,
+ SEC_ALLOC | SEC_LOAD | SEC_RELOC | SEC_DATA);
+ if (strcmp (TARGET_OS, "elf") != 0)
+ record_alignment (seg, 4);
}
+ demand_empty_rest_of_line ();
+ break;
}
auto_align = 1;
else
as_bad (_(".option pic%d not supported"), i);
- if (USE_GLOBAL_POINTER_OPT && mips_pic == SVR4_PIC)
+ if (mips_pic == SVR4_PIC)
{
if (g_switch_seen && g_switch_value != 0)
as_warn (_("-G may not be used with SVR4 PIC code"));
/* Permit the user to change the ISA and architecture on the fly.
Needless to say, misuse can cause serious problems. */
- if (strcmp (name, "mips0") == 0)
+ if (strcmp (name, "mips0") == 0 || strcmp (name, "arch=default") == 0)
{
reset = 1;
mips_opts.isa = file_mips_isa;
- }
- else if (strcmp (name, "mips1") == 0)
- mips_opts.isa = ISA_MIPS1;
- else if (strcmp (name, "mips2") == 0)
- mips_opts.isa = ISA_MIPS2;
- else if (strcmp (name, "mips3") == 0)
- mips_opts.isa = ISA_MIPS3;
- else if (strcmp (name, "mips4") == 0)
- mips_opts.isa = ISA_MIPS4;
- else if (strcmp (name, "mips5") == 0)
- mips_opts.isa = ISA_MIPS5;
- else if (strcmp (name, "mips32") == 0)
- mips_opts.isa = ISA_MIPS32;
- else if (strcmp (name, "mips32r2") == 0)
- mips_opts.isa = ISA_MIPS32R2;
- else if (strcmp (name, "mips64") == 0)
- mips_opts.isa = ISA_MIPS64;
- else if (strcmp (name, "mips64r2") == 0)
- mips_opts.isa = ISA_MIPS64R2;
- else if (strcmp (name, "arch=default") == 0)
- {
- reset = 1;
mips_opts.arch = file_mips_arch;
- mips_opts.isa = file_mips_isa;
}
else if (strncmp (name, "arch=", 5) == 0)
{
mips_opts.isa = p->isa;
}
}
+ else if (strncmp (name, "mips", 4) == 0)
+ {
+ const struct mips_cpu_info *p;
+
+ p = mips_parse_cpu("internal use", name);
+ if (!p)
+ as_bad (_("unknown ISA level %s"), name + 4);
+ else
+ {
+ mips_opts.arch = p->cpu;
+ mips_opts.isa = p->isa;
+ }
+ }
else
- as_bad (_("unknown ISA level %s"), name + 4);
+ as_bad (_("unknown ISA or architecture %s"), name);
switch (mips_opts.isa)
{
{
mips_pic = SVR4_PIC;
mips_abicalls = TRUE;
- if (USE_GLOBAL_POINTER_OPT)
- {
- if (g_switch_seen && g_switch_value != 0)
- as_warn (_("-G may not be used with SVR4 PIC code"));
- g_switch_value = 0;
- }
+
+ if (g_switch_seen && g_switch_value != 0)
+ as_warn (_("-G may not be used with SVR4 PIC code"));
+ g_switch_value = 0;
+
bfd_set_gp_size (stdoutput, 0);
demand_empty_rest_of_line ();
}
if (sym == 0)
return 0;
- if (USE_GLOBAL_POINTER_OPT && g_switch_value > 0)
+ if (g_switch_value > 0)
{
const char *symname;
int change;
#ifdef OBJ_ELF
/* A global or weak symbol is treated as external. */
&& (OUTPUT_FLAVOR != bfd_target_elf_flavour
- || (! S_IS_WEAK (sym)
- && (! S_IS_EXTERNAL (sym)
- || mips_pic == EMBEDDED_PIC)))
+ || (! S_IS_WEAK (sym) && ! S_IS_EXTERNAL (sym)))
#endif
);
}
}
/* This is called to see whether a reloc against a defined symbol
- should be converted into a reloc against a section. Don't adjust
- MIPS16 jump relocations, so we don't have to worry about the format
- of the offset in the .o file. Don't adjust relocations against
- mips16 symbols, so that the linker can find them if it needs to set
- up a stub. */
+ should be converted into a reloc against a section. */
int
mips_fix_adjustable (fixS *fixp)
{
+ /* Don't adjust MIPS16 jump relocations, so we don't have to worry
+ about the format of the offset in the .o file. */
if (fixp->fx_r_type == BFD_RELOC_MIPS16_JMP)
return 0;
if (fixp->fx_addsy == NULL)
return 1;
+ /* If symbol SYM is in a mergeable section, relocations of the form
+ SYM + 0 can usually be made section-relative. The mergeable data
+ is then identified by the section offset rather than by the symbol.
+
+ However, if we're generating REL LO16 relocations, the offset is split
+ between the LO16 and parterning high part relocation. The linker will
+ need to recalculate the complete offset in order to correctly identify
+ the merge data.
+
+ The linker has traditionally not looked for the parterning high part
+ relocation, and has thus allowed orphaned R_MIPS_LO16 relocations to be
+ placed anywhere. Rather than break backwards compatibility by changing
+ this, it seems better not to force the issue, and instead keep the
+ original symbol. This will work with either linker behavior. */
+ if ((fixp->fx_r_type == BFD_RELOC_LO16 || reloc_needs_lo_p (fixp->fx_r_type))
+ && HAVE_IN_PLACE_ADDENDS
+ && (S_GET_SEGMENT (fixp->fx_addsy)->flags & SEC_MERGE) != 0)
+ return 0;
+
#ifdef OBJ_ELF
+ /* Don't adjust relocations against mips16 symbols, so that the linker
+ can find them if it needs to set up a stub. */
if (OUTPUT_FLAVOR == bfd_target_elf_flavour
&& S_GET_OTHER (fixp->fx_addsy) == STO_MIPS16
&& fixp->fx_subsy == NULL)
*reloc->sym_ptr_ptr = symbol_get_bfdsym (fixp->fx_addsy);
reloc->address = fixp->fx_frag->fr_address + fixp->fx_where;
- if (mips_pic == EMBEDDED_PIC
- && SWITCH_TABLE (fixp))
- {
- /* For a switch table entry we use a special reloc. The addend
- is actually the difference between the reloc address and the
- subtrahend. */
- reloc->addend = reloc->address - S_GET_VALUE (fixp->fx_subsy);
- if (OUTPUT_FLAVOR != bfd_target_ecoff_flavour)
- as_fatal (_("Double check fx_r_type in tc-mips.c:tc_gen_reloc"));
- fixp->fx_r_type = BFD_RELOC_GPREL32;
- }
- else if (fixp->fx_pcrel)
- {
- bfd_vma pcrel_address;
-
- /* Set PCREL_ADDRESS to this relocation's "PC". The PC for high
- high-part relocs is the address of the low-part reloc. */
- if (fixp->fx_r_type == BFD_RELOC_PCREL_HI16_S)
- {
- assert (fixp->fx_next != NULL
- && fixp->fx_next->fx_r_type == BFD_RELOC_PCREL_LO16);
- pcrel_address = (fixp->fx_next->fx_where
- + fixp->fx_next->fx_frag->fr_address);
- }
- else
- pcrel_address = reloc->address;
-
- if (OUTPUT_FLAVOR == bfd_target_elf_flavour)
- {
- /* At this point, fx_addnumber is "symbol offset - pcrel_address".
- Relocations want only the symbol offset. */
- reloc->addend = fixp->fx_addnumber + pcrel_address;
- }
- else if (fixp->fx_r_type == BFD_RELOC_PCREL_LO16
- || fixp->fx_r_type == BFD_RELOC_PCREL_HI16_S)
- {
- /* We use a special addend for an internal RELLO or RELHI reloc. */
- if (symbol_section_p (fixp->fx_addsy))
- reloc->addend = pcrel_address - S_GET_VALUE (fixp->fx_subsy);
- else
- reloc->addend = fixp->fx_addnumber + pcrel_address;
- }
- else
- {
- if (OUTPUT_FLAVOR != bfd_target_aout_flavour)
- /* A gruesome hack which is a result of the gruesome gas reloc
- handling. */
- reloc->addend = pcrel_address;
- else
- reloc->addend = -pcrel_address;
- }
- }
- else
- reloc->addend = fixp->fx_addnumber;
+ assert (! fixp->fx_pcrel);
+ reloc->addend = fixp->fx_addnumber;
/* Since the old MIPS ELF ABI uses Rel instead of Rela, encode the vtable
entry to be used in the relocation's section offset. */
reloc->addend = 0;
}
- /* Since DIFF_EXPR_OK is defined in tc-mips.h, it is possible that
- fixup_segment converted a non-PC relative reloc into a PC
- relative reloc. In such a case, we need to convert the reloc
- code. */
code = fixp->fx_r_type;
- if (fixp->fx_pcrel)
- {
- switch (code)
- {
- case BFD_RELOC_8:
- code = BFD_RELOC_8_PCREL;
- break;
- case BFD_RELOC_16:
- code = BFD_RELOC_16_PCREL;
- break;
- case BFD_RELOC_32:
- code = BFD_RELOC_32_PCREL;
- break;
- case BFD_RELOC_64:
- code = BFD_RELOC_64_PCREL;
- break;
- case BFD_RELOC_8_PCREL:
- case BFD_RELOC_16_PCREL:
- case BFD_RELOC_32_PCREL:
- case BFD_RELOC_64_PCREL:
- case BFD_RELOC_16_PCREL_S2:
- case BFD_RELOC_PCREL_HI16_S:
- case BFD_RELOC_PCREL_LO16:
- break;
- default:
- as_bad_where (fixp->fx_file, fixp->fx_line,
- _("Cannot make %s relocation PC relative"),
- bfd_get_reloc_code_name (code));
- }
- }
- /* To support a PC relative reloc when generating embedded PIC code
- for ECOFF, we use a Cygnus extension. We check for that here to
- make sure that we don't let such a reloc escape normally. */
+ /* To support a PC relative reloc, we used a Cygnus extension.
+ We check for that here to make sure that we don't let such a
+ reloc escape normally. (FIXME: This was formerly used by
+ embedded-PIC support, but is now used by branch handling in
+ general. That probably should be fixed.) */
if ((OUTPUT_FLAVOR == bfd_target_ecoff_flavour
|| OUTPUT_FLAVOR == bfd_target_elf_flavour)
- && code == BFD_RELOC_16_PCREL_S2
- && mips_pic != EMBEDDED_PIC)
+ && code == BFD_RELOC_16_PCREL_S2)
reloc->howto = NULL;
else
reloc->howto = bfd_reloc_type_lookup (stdoutput, code);
fprintf (stream, _("\
MIPS options:\n\
--membedded-pic generate embedded position independent code\n\
-EB generate big endian output\n\
-EL generate little endian output\n\
-g, -g2 do not remove unneeded NOPs or swap branches\n\
-mips16 generate mips16 instructions\n\
-no-mips16 do not generate mips16 instructions\n"));
fprintf (stream, _("\
+-mfix-vr4120 work around certain VR4120 errata\n\
-mgp32 use 32-bit GPRs, regardless of the chosen ISA\n\
-mfp32 use 32-bit FPRs, regardless of the chosen ISA\n\
-O0 remove unneeded NOPs, do not swap branches\n\
else
return dwarf2_format_32bit;
}
+
+int
+mips_dwarf2_addr_size (void)
+{
+ if (mips_abi == N64_ABI)
+ return 8;
+ else
+ return 4;
+}
projects / deliverable / binutils-gdb.git / blobdiff