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i386-dis: Fix unused return value, spotted by clang 

Fix clang erros like:
  CC    libdis/i386-dis.o
/src/qemu/i386-dis.c:3323:7: error: expression result unused [-Wunused-value]
      FETCH_DATA (the_info, codep + 1);
/src/qemu/i386-dis.c:285:6: note: instantiated from:
   ? 1 : fetch_data ((info), (addr)))

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2010-04-18 14:27:44 +00:00
parent 7b13448f05
commit 156aa8981a
1 changed files with 32 additions and 24 deletions
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56
i386-dis.c
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@ -155,7 +155,8 @@
#include <setjmp.h>
static int fetch_data (struct disassemble_info *, bfd_byte *);
static int fetch_data2(struct disassemble_info *, bfd_byte *);
static int fetch_data(struct disassemble_info *, bfd_byte *);
static void ckprefix (void);
static const char *prefix_name (int, int);
static int print_insn (bfd_vma, disassemble_info *);
@ -280,12 +281,8 @@ static int used_prefixes;
/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
to ADDR (exclusive) are valid. Returns 1 for success, longjmps
on error. */
#define FETCH_DATA(info, addr) \
((addr) <= ((struct dis_private *) (info->private_data))->max_fetched \
? 1 : fetch_data ((info), (addr)))
static int
fetch_data (struct disassemble_info *info, bfd_byte *addr)
fetch_data2(struct disassemble_info *info, bfd_byte *addr)
{
int status;
struct dis_private *priv = (struct dis_private *) info->private_data;
@ -313,6 +310,17 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr)
return 1;
}
static int
fetch_data(struct disassemble_info *info, bfd_byte *addr)
{
if (addr <= ((struct dis_private *) (info->private_data))->max_fetched) {
return 1;
} else {
return fetch_data2(info, addr);
}
}
#define XX { NULL, 0 }
#define Eb { OP_E, b_mode }
@ -3320,7 +3328,7 @@ ckprefix (void)
rex_used = 0;
while (1)
{
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
newrex = 0;
switch (*codep)
{
@ -3684,7 +3692,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
insn_codep = codep;
sizeflag = priv.orig_sizeflag;
FETCH_DATA (info, codep + 1);
fetch_data(info, codep + 1);
two_source_ops = (*codep == 0x62) || (*codep == 0xc8);
if (((prefixes & PREFIX_FWAIT)
@ -3706,7 +3714,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
if (*codep == 0x0f)
{
unsigned char threebyte;
FETCH_DATA (info, codep + 2);
fetch_data(info, codep + 2);
threebyte = *++codep;
dp = &dis386_twobyte[threebyte];
need_modrm = twobyte_has_modrm[*codep];
@ -3717,7 +3725,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
codep++;
if (dp->name == NULL && dp->op[0].bytemode == IS_3BYTE_OPCODE)
{
FETCH_DATA (info, codep + 2);
fetch_data(info, codep + 2);
op = *codep++;
switch (threebyte)
{
@ -3802,7 +3810,7 @@ print_insn (bfd_vma pc, disassemble_info *info)
}
else if (need_modrm)
{
FETCH_DATA (info, codep + 1);
fetch_data(info, codep + 1);
modrm.mod = (*codep >> 6) & 3;
modrm.reg = (*codep >> 3) & 7;
modrm.rm = *codep & 7;
@ -4968,7 +4976,7 @@ OP_E (int bytemode, int sizeflag)
if (base == 4)
{
havesib = 1;
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
index = (*codep >> 3) & 7;
if (address_mode == mode_64bit || index != 0x4)
/* When INDEX == 0x4 in 32 bit mode, SCALE is ignored. */
@ -4993,7 +5001,7 @@ OP_E (int bytemode, int sizeflag)
}
break;
case 1:
FETCH_DATA (the_info, codep + 1);
fetch_data (the_info, codep + 1);
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
@ -5104,7 +5112,7 @@ OP_E (int bytemode, int sizeflag)
}
break;
case 1:
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
@ -5226,7 +5234,7 @@ get64 (void)
unsigned int a;
unsigned int b;
FETCH_DATA (the_info, codep + 8);
fetch_data(the_info, codep + 8);
a = *codep++ & 0xff;
a |= (*codep++ & 0xff) << 8;
a |= (*codep++ & 0xff) << 16;
@ -5248,7 +5256,7 @@ get32 (void)
{
bfd_signed_vma x = 0;
FETCH_DATA (the_info, codep + 4);
fetch_data(the_info, codep + 4);
x = *codep++ & (bfd_signed_vma) 0xff;
x |= (*codep++ & (bfd_signed_vma) 0xff) << 8;
x |= (*codep++ & (bfd_signed_vma) 0xff) << 16;
@ -5261,7 +5269,7 @@ get32s (void)
{
bfd_signed_vma x = 0;
FETCH_DATA (the_info, codep + 4);
fetch_data(the_info, codep + 4);
x = *codep++ & (bfd_signed_vma) 0xff;
x |= (*codep++ & (bfd_signed_vma) 0xff) << 8;
x |= (*codep++ & (bfd_signed_vma) 0xff) << 16;
@ -5277,7 +5285,7 @@ get16 (void)
{
int x = 0;
FETCH_DATA (the_info, codep + 2);
fetch_data(the_info, codep + 2);
x = *codep++ & 0xff;
x |= (*codep++ & 0xff) << 8;
return x;
@ -5418,7 +5426,7 @@ OP_I (int bytemode, int sizeflag)
switch (bytemode)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
op = *codep++;
mask = 0xff;
break;
@ -5480,7 +5488,7 @@ OP_I64 (int bytemode, int sizeflag)
switch (bytemode)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
op = *codep++;
mask = 0xff;
break;
@ -5524,7 +5532,7 @@ OP_sI (int bytemode, int sizeflag)
switch (bytemode)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
op = *codep++;
if ((op & 0x80) != 0)
op -= 0x100;
@ -5570,7 +5578,7 @@ OP_J (int bytemode, int sizeflag)
switch (bytemode)
{
case b_mode:
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
disp = *codep++;
if ((disp & 0x80) != 0)
disp -= 0x100;
@ -6092,7 +6100,7 @@ OP_3DNowSuffix (int bytemode ATTRIBUTE_UNUSED, int sizeflag ATTRIBUTE_UNUSED)
{
const char *mnemonic;
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
/* AMD 3DNow! instructions are specified by an opcode suffix in the
place where an 8-bit immediate would normally go. ie. the last
byte of the instruction. */
@ -6128,7 +6136,7 @@ OP_SIMD_Suffix (int bytemode ATTRIBUTE_UNUSED, int sizeflag ATTRIBUTE_UNUSED)
{
unsigned int cmp_type;
FETCH_DATA (the_info, codep + 1);
fetch_data(the_info, codep + 1);
obufp = obuf + strlen (obuf);
cmp_type = *codep++ & 0xff;
if (cmp_type < 8)