diff options
| -rw-r--r-- | gdb/ChangeLog | 8 | ||||
| -rw-r--r-- | gdb/gdbserver/ChangeLog | 8 | ||||
| -rw-r--r-- | gdb/gdbserver/linux-ppc-low.c | 17 | ||||
| -rw-r--r-- | gdb/ppc-linux-nat.c | 12 |
4 files changed, 37 insertions, 8 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index c3e0482..9086bbe 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -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. diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog index 964ab07..68ad1a5 100644 --- a/gdb/gdbserver/ChangeLog +++ b/gdb/gdbserver/ChangeLog @@ -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. diff --git a/gdb/gdbserver/linux-ppc-low.c b/gdb/gdbserver/linux-ppc-low.c index b184d5c..06adbd3 100644 --- a/gdb/gdbserver/linux-ppc-low.c +++ b/gdb/gdbserver/linux-ppc-low.c @@ -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 (); diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c index 034201b..b7e70d1 100644 --- a/gdb/ppc-linux-nat.c +++ b/gdb/ppc-linux-nat.c @@ -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 |