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Fix size of FPSCR in Power 7 processors.
	* ppc-linux-nat.c (PPC_FEATURE_ARCH_2_05): Remove #define.
	(PPC_FEATURE_HAS_DFP): New #define.
	(ppc_linux_read_description): Check for DFP feature instead of
	ISA 2.05 to decide on size of the FPSCR.

gdbserver/
	Fix size of FPSCR in Power 7 processors.
	* linux-ppc-low.c (PPC_FEATURE_ARCH_2_05): Remove #define.
	(PPC_FEATURE_HAS_DFP): New #define.
	(ppc_arch_setup): Check for DFP feature instead of ISA 2.05 to decide on
	size of the FPSCR.
This commit is contained in:
Thiago Jung Bauermann 2009-03-25 21:15:04 +00:00
parent 41aacd835d
commit f04c6d38e2
4 changed files with 37 additions and 8 deletions
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8
gdb/ChangeLog
View File

@ -1,3 +1,11 @@
2009-03-25 Thiago Jung Bauermann <bauerman@br.ibm.com>
Fix size of FPSCR in Power 7 processors.
* ppc-linux-nat.c (PPC_FEATURE_ARCH_2_05): Remove #define.
(PPC_FEATURE_HAS_DFP): New #define.
(ppc_linux_read_description): Check for DFP feature instead of
ISA 2.05 to decide on size of the FPSCR.
2009-03-25 Kevin Buettner <kevinb@redhat.com>
* mn10300-tdep.c (trad-frame.h): Don't include.

8
gdb/gdbserver/ChangeLog
View File

@ -1,3 +1,11 @@
2009-03-25 Thiago Jung Bauermann <bauerman@br.ibm.com>
Fix size of FPSCR in Power 7 processors.
* linux-ppc-low.c (PPC_FEATURE_ARCH_2_05): Remove #define.
(PPC_FEATURE_HAS_DFP): New #define.
(ppc_arch_setup): Check for DFP feature instead of ISA 2.05 to decide on
size of the FPSCR.
2009-03-23 Pedro Alves <pedro@codesourcery.com>
* server.c (handle_query) Whitespace and formatting.

17
gdb/gdbserver/linux-ppc-low.c
View File

@ -28,7 +28,7 @@
#define PPC_FEATURE_HAS_VSX 0x00000080
#define PPC_FEATURE_HAS_ALTIVEC 0x10000000
#define PPC_FEATURE_HAS_SPE 0x00800000
#define PPC_FEATURE_ARCH_2_05 0x00001000
#define PPC_FEATURE_HAS_DFP 0x00000400
static unsigned long ppc_hwcap;
@ -274,14 +274,21 @@ ppc_arch_setup (void)
ppc_get_hwcap (&ppc_hwcap);
if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
{
if (ppc_hwcap & PPC_FEATURE_ARCH_2_05)
/* Power ISA 2.05 (implemented by Power 6 and newer processors)
increases the FPSCR from 32 bits to 64 bits. Even though Power 7
supports this ISA version, it doesn't have PPC_FEATURE_ARCH_2_05
set, only PPC_FEATURE_ARCH_2_06. Since for now the only bits
used in the higher half of the register are for Decimal Floating
Point, we check if that feature is available to decide the size
of the FPSCR. */
if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
init_registers_powerpc_isa205_vsx64l ();
else
init_registers_powerpc_vsx64l ();
}
else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
{
if (ppc_hwcap & PPC_FEATURE_ARCH_2_05)
if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
init_registers_powerpc_isa205_altivec64l ();
else
init_registers_powerpc_altivec64l ();
@ -297,14 +304,14 @@ ppc_arch_setup (void)
ppc_get_hwcap (&ppc_hwcap);
if (ppc_hwcap & PPC_FEATURE_HAS_VSX)
{
if (ppc_hwcap & PPC_FEATURE_ARCH_2_05)
if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
init_registers_powerpc_isa205_vsx32l ();
else
init_registers_powerpc_vsx32l ();
}
else if (ppc_hwcap & PPC_FEATURE_HAS_ALTIVEC)
{
if (ppc_hwcap & PPC_FEATURE_ARCH_2_05)
if (ppc_hwcap & PPC_FEATURE_HAS_DFP)
init_registers_powerpc_isa205_altivec32l ();
else
init_registers_powerpc_altivec32l ();

12
gdb/ppc-linux-nat.c
View File

@ -63,8 +63,8 @@
#ifndef PPC_FEATURE_BOOKE
#define PPC_FEATURE_BOOKE 0x00008000
#endif
#ifndef PPC_FEATURE_ARCH_2_05
#define PPC_FEATURE_ARCH_2_05 0x00001000 /* ISA 2.05 */
#ifndef PPC_FEATURE_HAS_DFP
#define PPC_FEATURE_HAS_DFP 0x00000400 /* Decimal Floating Point. */
#endif
/* Glibc's headers don't define PTRACE_GETVRREGS so we cannot use a
@ -1290,7 +1290,13 @@ ppc_linux_read_description (struct target_ops *ops)
perror_with_name (_("Unable to fetch AltiVec registers"));
}
if (ppc_linux_get_hwcap () & PPC_FEATURE_ARCH_2_05)
/* Power ISA 2.05 (implemented by Power 6 and newer processors) increases
the FPSCR from 32 bits to 64 bits. Even though Power 7 supports this
ISA version, it doesn't have PPC_FEATURE_ARCH_2_05 set, only
PPC_FEATURE_ARCH_2_06. Since for now the only bits used in the higher
half of the register are for Decimal Floating Point, we check if that
feature is available to decide the size of the FPSCR. */
if (ppc_linux_get_hwcap () & PPC_FEATURE_HAS_DFP)
isa205 = 1;
/* Check for 64-bit inferior process. This is the case when the host is