diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 8 | ||||
| -rw-r--r-- | arch/powerpc/kernel/kprobes.c | 8 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci_64.c | 2 | ||||
| -rw-r--r-- | arch/powerpc/kernel/traps.c | 109 | ||||
| -rw-r--r-- | arch/powerpc/kernel/vdso.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/lib/Makefile | 2 |
6 files changed, 95 insertions, 41 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index 5f80f0b..0b6325a 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -492,6 +492,7 @@ config PPC_MAPLE select PPC_NATIVE select PPC_RTAS select MMIO_NVRAM + select ATA_NONSTANDARD if ATA default n help This option enables support for the Maple 970FX Evaluation Board. @@ -533,12 +534,15 @@ config PPC_IBM_CELL_BLADE select UDBG_RTAS_CONSOLE config PPC_PS3 - bool "Sony PS3" + bool "Sony PS3 (incomplete)" depends on PPC_MULTIPLATFORM && PPC64 select PPC_CELL help This option enables support for the Sony PS3 game console and other platforms using the PS3 hypervisor. + Support for this platform is not yet complete, so + enabling this will not result in a bootable kernel on a + PS3 system. config PPC_CELLEB bool "Toshiba's Cell Reference Set 'Celleb' Architecture" @@ -1202,7 +1206,7 @@ source "arch/powerpc/oprofile/Kconfig" config KPROBES bool "Kprobes (EXPERIMENTAL)" - depends on PPC64 && KALLSYMS && EXPERIMENTAL && MODULES + depends on !BOOKE && !4xx && KALLSYMS && EXPERIMENTAL && MODULES help Kprobes allows you to trap at almost any kernel address and execute a callback function. register_kprobe() establishes diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c index 4657563..dd2886f 100644 --- a/arch/powerpc/kernel/kprobes.c +++ b/arch/powerpc/kernel/kprobes.c @@ -46,8 +46,8 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) if ((unsigned long)p->addr & 0x03) { printk("Attempt to register kprobe at an unaligned address\n"); ret = -EINVAL; - } else if (IS_MTMSRD(insn) || IS_RFID(insn)) { - printk("Cannot register a kprobe on rfid or mtmsrd\n"); + } else if (IS_MTMSRD(insn) || IS_RFID(insn) || IS_RFI(insn)) { + printk("Cannot register a kprobe on rfi/rfid or mtmsr[d]\n"); ret = -EINVAL; } @@ -483,8 +483,12 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs) memcpy(&kcb->jprobe_saved_regs, regs, sizeof(struct pt_regs)); /* setup return addr to the jprobe handler routine */ +#ifdef CONFIG_PPC64 regs->nip = (unsigned long)(((func_descr_t *)jp->entry)->entry); regs->gpr[2] = (unsigned long)(((func_descr_t *)jp->entry)->toc); +#else + regs->nip = (unsigned long)jp->entry; +#endif return 1; } diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index b6d0873..6828df4 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -1429,7 +1429,7 @@ long sys_pciconfig_iobase(long which, unsigned long in_bus, for (ln = pci_root_buses.next; ln != &pci_root_buses; ln = ln->next) { bus = pci_bus_b(ln); - if (in_bus >= bus->number && in_bus < (bus->number + bus->subordinate)) + if (in_bus >= bus->number && in_bus <= bus->subordinate) break; bus = NULL; } diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 6915b91..dcc6f15 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -535,34 +535,40 @@ static void emulate_single_step(struct pt_regs *regs) } } -static void parse_fpe(struct pt_regs *regs) +static inline int __parse_fpscr(unsigned long fpscr) { - int code = 0; - unsigned long fpscr; - - flush_fp_to_thread(current); - - fpscr = current->thread.fpscr.val; + int ret = 0; /* Invalid operation */ if ((fpscr & FPSCR_VE) && (fpscr & FPSCR_VX)) - code = FPE_FLTINV; + ret = FPE_FLTINV; /* Overflow */ else if ((fpscr & FPSCR_OE) && (fpscr & FPSCR_OX)) - code = FPE_FLTOVF; + ret = FPE_FLTOVF; /* Underflow */ else if ((fpscr & FPSCR_UE) && (fpscr & FPSCR_UX)) - code = FPE_FLTUND; + ret = FPE_FLTUND; /* Divide by zero */ else if ((fpscr & FPSCR_ZE) && (fpscr & FPSCR_ZX)) - code = FPE_FLTDIV; + ret = FPE_FLTDIV; /* Inexact result */ else if ((fpscr & FPSCR_XE) && (fpscr & FPSCR_XX)) - code = FPE_FLTRES; + ret = FPE_FLTRES; + + return ret; +} + +static void parse_fpe(struct pt_regs *regs) +{ + int code = 0; + + flush_fp_to_thread(current); + + code = __parse_fpscr(current->thread.fpscr.val); _exception(SIGFPE, regs, code, regs->nip); } @@ -739,20 +745,7 @@ void __kprobes program_check_exception(struct pt_regs *regs) extern int do_mathemu(struct pt_regs *regs); /* We can now get here via a FP Unavailable exception if the core - * has no FPU, in that case no reason flags will be set */ -#ifdef CONFIG_MATH_EMULATION - /* (reason & REASON_ILLEGAL) would be the obvious thing here, - * but there seems to be a hardware bug on the 405GP (RevD) - * that means ESR is sometimes set incorrectly - either to - * ESR_DST (!?) or 0. In the process of chasing this with the - * hardware people - not sure if it can happen on any illegal - * instruction or only on FP instructions, whether there is a - * pattern to occurences etc. -dgibson 31/Mar/2003 */ - if (!(reason & REASON_TRAP) && do_mathemu(regs) == 0) { - emulate_single_step(regs); - return; - } -#endif /* CONFIG_MATH_EMULATION */ + * has no FPU, in that case the reason flags will be 0 */ if (reason & REASON_FP) { /* IEEE FP exception */ @@ -778,6 +771,31 @@ void __kprobes program_check_exception(struct pt_regs *regs) local_irq_enable(); +#ifdef CONFIG_MATH_EMULATION + /* (reason & REASON_ILLEGAL) would be the obvious thing here, + * but there seems to be a hardware bug on the 405GP (RevD) + * that means ESR is sometimes set incorrectly - either to + * ESR_DST (!?) or 0. In the process of chasing this with the + * hardware people - not sure if it can happen on any illegal + * instruction or only on FP instructions, whether there is a + * pattern to occurences etc. -dgibson 31/Mar/2003 */ + switch (do_mathemu(regs)) { + case 0: + emulate_single_step(regs); + return; + case 1: { + int code = 0; + code = __parse_fpscr(current->thread.fpscr.val); + _exception(SIGFPE, regs, code, regs->nip); + return; + } + case -EFAULT: + _exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip); + return; + } + /* fall through on any other errors */ +#endif /* CONFIG_MATH_EMULATION */ + /* Try to emulate it if we should. */ if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) { switch (emulate_instruction(regs)) { @@ -891,18 +909,39 @@ void SoftwareEmulation(struct pt_regs *regs) #ifdef CONFIG_MATH_EMULATION errcode = do_mathemu(regs); + + switch (errcode) { + case 0: + emulate_single_step(regs); + return; + case 1: { + int code = 0; + code = __parse_fpscr(current->thread.fpscr.val); + _exception(SIGFPE, regs, code, regs->nip); + return; + } + case -EFAULT: + _exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip); + return; + default: + _exception(SIGILL, regs, ILL_ILLOPC, regs->nip); + return; + } + #else errcode = Soft_emulate_8xx(regs); -#endif - if (errcode) { - if (errcode > 0) - _exception(SIGFPE, regs, 0, 0); - else if (errcode == -EFAULT) - _exception(SIGSEGV, regs, 0, 0); - else - _exception(SIGILL, regs, ILL_ILLOPC, regs->nip); - } else + switch (errcode) { + case 0: emulate_single_step(regs); + return; + case 1: + _exception(SIGILL, regs, ILL_ILLOPC, regs->nip); + return; + case -EFAULT: + _exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip); + return; + } +#endif } #endif /* CONFIG_8xx */ diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c index a4b28c7..ae0ede1 100644 --- a/arch/powerpc/kernel/vdso.c +++ b/arch/powerpc/kernel/vdso.c @@ -284,6 +284,13 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, * pages though */ vma->vm_flags = VM_READ|VM_EXEC|VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC; + /* + * Make sure the vDSO gets into every core dump. + * Dumping its contents makes post-mortem fully interpretable later + * without matching up the same kernel and hardware config to see + * what PC values meant. + */ + vma->vm_flags |= VM_ALWAYSDUMP; vma->vm_flags |= mm->def_flags; vma->vm_page_prot = protection_map[vma->vm_flags & 0x7]; vma->vm_ops = &vdso_vmops; diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile index e2d4141..4b1ba49 100644 --- a/arch/powerpc/lib/Makefile +++ b/arch/powerpc/lib/Makefile @@ -16,11 +16,11 @@ obj-$(CONFIG_PPC64) += checksum_64.o copypage_64.o copyuser_64.o \ strcase.o obj-$(CONFIG_QUICC_ENGINE) += rheap.o obj-$(CONFIG_XMON) += sstep.o +obj-$(CONFIG_KPROBES) += sstep.o obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o ifeq ($(CONFIG_PPC64),y) obj-$(CONFIG_SMP) += locks.o -obj-$(CONFIG_DEBUG_KERNEL) += sstep.o endif # Temporary hack until we have migrated to asm-powerpc |
