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2000-03-06 Mark Kettenis <kettenis@gnu.org>

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* i386-linux-nat.c (supply_fpregset): Mask off the reserved bits
	in *FPREGSETP.
	(convert_to_fpregset): Don't touch the reserved bits in *FPREGSETP.
This commit is contained in:
Mark Kettenis 2000-03-06 16:08:12 +00:00
parent b47e35fc72
commit b948cda90b
2 changed files with 37 additions and 17 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2000-03-06 Mark Kettenis <kettenis@gnu.org>
* i386-linux-nat.c (supply_fpregset): Mask off the reserved bits
in *FPREGSETP.
(convert_to_fpregset): Don't touch the reserved bits in *FPREGSETP.
2000-03-05 Mark Kettenis <kettenis@gnu.org>
Allow GDB to run on Linux 2.0 again.

48
gdb/i386-linux-nat.c
View file

@ -393,28 +393,33 @@ void
supply_fpregset (elf_fpregset_t *fpregsetp)
{
int reg;
long l;
/* Supply the floating-point registers. */
for (reg = 0; reg < 8; reg++)
supply_register (FP0_REGNUM + reg, FPREG_ADDR (fpregsetp, reg));
supply_register (FCTRL_REGNUM, (char *) &fpregsetp->cwd);
supply_register (FSTAT_REGNUM, (char *) &fpregsetp->swd);
supply_register (FTAG_REGNUM, (char *) &fpregsetp->twd);
/* We have to mask off the reserved bits in *FPREGSETP before
storing the values in GDB's register file. */
#define supply(REGNO, MEMBER) \
l = fpregsetp->MEMBER & 0xffff; \
supply_register (REGNO, (char *) &l)
supply (FCTRL_REGNUM, cwd);
supply (FSTAT_REGNUM, swd);
supply (FTAG_REGNUM, twd);
supply_register (FCOFF_REGNUM, (char *) &fpregsetp->fip);
supply_register (FDS_REGNUM, (char *) &fpregsetp->fos);
supply (FDS_REGNUM, fos);
supply_register (FDOFF_REGNUM, (char *) &fpregsetp->foo);
#undef supply
/* Extract the code segment and opcode from the "fcs" member. */
{
long l;
l = fpregsetp->fcs & 0xffff;
supply_register (FCS_REGNUM, (char *) &l);
l = fpregsetp->fcs & 0xffff;
supply_register (FCS_REGNUM, (char *) &l);
l = (fpregsetp->fcs >> 16) & ((1 << 11) - 1);
supply_register (FOP_REGNUM, (char *) &l);
}
l = (fpregsetp->fcs >> 16) & ((1 << 11) - 1);
supply_register (FOP_REGNUM, (char *) &l);
}
/* Convert the valid floating-point register values in GDB's register
@ -434,19 +439,28 @@ convert_to_fpregset (elf_fpregset_t *fpregsetp, signed char *valid)
&registers[REGISTER_BYTE (FP0_REGNUM + reg)],
REGISTER_RAW_SIZE(FP0_REGNUM + reg));
/* We're not supposed to touch the reserved bits in *FPREGSETP. */
#define fill(MEMBER, REGNO) \
if (! valid || valid[(REGNO)]) \
memcpy (&fpregsetp->MEMBER, &registers[REGISTER_BYTE (REGNO)], \
sizeof (fpregsetp->MEMBER))
fpregsetp->MEMBER \
= ((fpregsetp->MEMBER & ~0xffff) \
| (* (int *) &registers[REGISTER_BYTE (REGNO)] & 0xffff))
#define fill_register(MEMBER, REGNO) \
if (! valid || valid[(REGNO)]) \
memcpy (&fpregsetp->MEMBER, &registers[REGISTER_BYTE (REGNO)], \
sizeof (fpregsetp->MEMBER))
fill (cwd, FCTRL_REGNUM);
fill (swd, FSTAT_REGNUM);
fill (twd, FTAG_REGNUM);
fill (fip, FCOFF_REGNUM);
fill_register (fip, FCOFF_REGNUM);
fill (foo, FDOFF_REGNUM);
fill (fos, FDS_REGNUM);
fill_register (fos, FDS_REGNUM);
#undef fill
#undef fill_register
if (! valid || valid[FCS_REGNUM])
fpregsetp->fcs