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2005-02-08 Andrew Cagney <cagney@gnu.org>

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* ppc-linux-nat.c (ppc_register_u_addr): Hack around 64-bit
	PT_FPSCR breakage.
This commit is contained in:
Andrew Cagney 2005-02-08 21:00:16 +00:00
parent 1c7c5e5b09
commit 8f13581218
2 changed files with 16 additions and 2 deletions
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3
gdb/ChangeLog
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@ -1,5 +1,8 @@
2005-02-08 Andrew Cagney <cagney@gnu.org>
* ppc-linux-nat.c (ppc_register_u_addr): Hack around 64-bit
PT_FPSCR breakage.
* value.c (struct value): Move to here ...
* value.h (struct value): ... from here. Copy comments to
corresponding function declarations, re-order.

15
gdb/ppc-linux-nat.c
View File

@ -212,8 +212,19 @@ ppc_register_u_addr (int regno)
u_addr = PT_MSR * wordsize;
if (tdep->ppc_fpscr_regnum >= 0
&& regno == tdep->ppc_fpscr_regnum)
u_addr = PT_FPSCR * wordsize;
{
/* NOTE: cagney/2005-02-08: On some 64-bit GNU/Linux systems the
kernel headers incorrectly contained the 32-bit definition of
PT_FPSCR. For the 32-bit definition, floating-point
registers occupy two 32-bit "slots", and the FPSCR lives in
the secondhalf of such a slot-pair (hence +1). For 64-bit,
the FPSCR instead occupies the full 64-bit 2-word-slot and
hence no adjustment is necessary. Hack around this. */
if (wordsize == 8 && PT_FPSCR == (48 + 32 + 1))
u_addr = (48 + 32) * wordsize;
else
u_addr = PT_FPSCR * wordsize;
}
return u_addr;
}