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MIPS/GAS: Use frag symbol/offset directly in fixup creation 

There is no need to use a helper expression in the creation of fixups
made from a frag's symbol and offset, because a simple `symbol+offset'
expression can be handled directly, with the use of a `fix_new' rather
than a `fix_new_exp' call.  Rewrite `md_convert_frag' using `fix_new'
then and remove all the unneeded helper expressions, simplifying code.

	gas/
	* config/tc-mips.c (md_convert_frag): Rewrite `fix_new_exp'
	calls in terms of `fix_new'.
This commit is contained in:
Maciej W. Rozycki 2017-07-01 00:42:19 +01:00
parent 9f00292e69
commit bbd27b7684
2 changed files with 38 additions and 44 deletions
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5
gas/ChangeLog
View File

@ -1,3 +1,8 @@
2017-06-30 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (md_convert_frag): Rewrite `fix_new_exp'
calls in terms of `fix_new'.
2017-06-30 Maciej W. Rozycki <macro@imgtec.com>
* config/tc-mips.c (md_convert_frag): Don't make a helper

77
gas/config/tc-mips.c
View File

@ -18135,7 +18135,6 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
{
char *buf;
unsigned long insn;
expressionS exp;
fixS *fixp;
buf = fragp->fr_literal + fragp->fr_fix;
@ -18146,12 +18145,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
/* We generate a fixup instead of applying it right now
because, if there are linker relaxations, we're going to
need the relocations. */
exp.X_op = O_symbol;
exp.X_add_symbol = fragp->fr_symbol;
exp.X_add_number = fragp->fr_offset;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, TRUE,
BFD_RELOC_16_PCREL_S2);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
TRUE, BFD_RELOC_16_PCREL_S2);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18267,12 +18263,10 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
/* j or jal. */
insn = (RELAX_BRANCH_LINK (fragp->fr_subtype)
? 0x0c000000 : 0x08000000);
exp.X_op = O_symbol;
exp.X_add_symbol = fragp->fr_symbol;
exp.X_add_number = fragp->fr_offset;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp,
FALSE, BFD_RELOC_MIPS_JMP);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_MIPS_JMP);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18285,12 +18279,10 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
/* lw/ld $at, <sym>($gp) R_MIPS_GOT16 */
insn = HAVE_64BIT_ADDRESSES ? 0xdf800000 : 0x8f800000;
insn |= at << OP_SH_RT;
exp.X_op = O_symbol;
exp.X_add_symbol = fragp->fr_symbol;
exp.X_add_number = fragp->fr_offset;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp,
FALSE, BFD_RELOC_MIPS_GOT16);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_MIPS_GOT16);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18304,8 +18296,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
insn = HAVE_64BIT_ADDRESSES ? 0x64000000 : 0x24000000;
insn |= at << OP_SH_RS | at << OP_SH_RT;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp,
FALSE, BFD_RELOC_LO16);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_LO16);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18339,13 +18332,8 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
int type = RELAX_MICROMIPS_TYPE (fragp->fr_subtype);
bfd_boolean short_ds;
unsigned long insn;
expressionS exp;
fixS *fixp;
exp.X_op = O_symbol;
exp.X_add_symbol = fragp->fr_symbol;
exp.X_add_number = fragp->fr_offset;
fragp->fr_fix += fragp->fr_var;
/* Handle 16-bit branches that fit or are forced to fit. */
@ -18355,11 +18343,13 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
because if there is linker relaxation, we're going to
need the relocations. */
if (type == 'D')
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 2, &exp, TRUE,
BFD_RELOC_MICROMIPS_10_PCREL_S1);
fixp = fix_new (fragp, buf - fragp->fr_literal, 2,
fragp->fr_symbol, fragp->fr_offset,
TRUE, BFD_RELOC_MICROMIPS_10_PCREL_S1);
else if (type == 'E')
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 2, &exp, TRUE,
BFD_RELOC_MICROMIPS_7_PCREL_S1);
fixp = fix_new (fragp, buf - fragp->fr_literal, 2,
fragp->fr_symbol, fragp->fr_offset,
TRUE, BFD_RELOC_MICROMIPS_7_PCREL_S1);
else
abort ();
@ -18380,8 +18370,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
/* We generate a fixup instead of applying it right now,
because if there is linker relaxation, we're going to
need the relocations. */
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, TRUE,
BFD_RELOC_MICROMIPS_16_PCREL_S1);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
TRUE, BFD_RELOC_MICROMIPS_16_PCREL_S1);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18518,8 +18509,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
/* j/jal/jals <sym> R_MICROMIPS_26_S1 */
insn = al ? jal : 0xd4000000;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE,
BFD_RELOC_MICROMIPS_JMP);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_MICROMIPS_JMP);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18542,8 +18534,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
insn = HAVE_64BIT_ADDRESSES ? 0xdc1c0000 : 0xfc1c0000;
insn |= at << MICROMIPSOP_SH_RT;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE,
BFD_RELOC_MICROMIPS_GOT16);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_MICROMIPS_GOT16);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18553,8 +18546,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
insn = HAVE_64BIT_ADDRESSES ? 0x5c000000 : 0x30000000;
insn |= at << MICROMIPSOP_SH_RT | at << MICROMIPSOP_SH_RS;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp, FALSE,
BFD_RELOC_MICROMIPS_LO16);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
FALSE, BFD_RELOC_MICROMIPS_LO16);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
@ -18758,7 +18752,6 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
if (need_reloc)
{
bfd_reloc_code_real_type reloc = BFD_RELOC_NONE;
expressionS exp;
fixS *fixp;
switch (type)
@ -18775,13 +18768,9 @@ md_convert_frag (bfd *abfd ATTRIBUTE_UNUSED, segT asec, fragS *fragp)
_("unsupported relocation"));
else if (ext)
{
exp.X_op = O_symbol;
exp.X_add_symbol = fragp->fr_symbol;
exp.X_add_number = fragp->fr_offset;
fixp = fix_new_exp (fragp, buf - fragp->fr_literal, 4, &exp,
TRUE, reloc);
fixp = fix_new (fragp, buf - fragp->fr_literal, 4,
fragp->fr_symbol, fragp->fr_offset,
TRUE, reloc);
fixp->fx_file = fragp->fr_file;
fixp->fx_line = fragp->fr_line;
}