diff options
41 files changed, 1541 insertions, 430 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile index c68eace12a9..9a74b7ab03a 100644 --- a/arch/powerpc/kernel/Makefile +++ b/arch/powerpc/kernel/Makefile @@ -12,11 +12,13 @@ CFLAGS_btext.o += -fPIC endif obj-y := semaphore.o cputable.o ptrace.o syscalls.o \ - irq.o signal_32.o pmc.o + irq.o signal_32.o pmc.o vdso.o +obj-y += vdso32/ obj-$(CONFIG_PPC64) += setup_64.o binfmt_elf32.o sys_ppc32.o \ signal_64.o ptrace32.o systbl.o \ paca.o ioctl32.o cpu_setup_power4.o \ firmware.o sysfs.o udbg.o +obj-$(CONFIG_PPC64) += vdso64/ obj-$(CONFIG_ALTIVEC) += vecemu.o vector.o obj-$(CONFIG_POWER4) += idle_power4.o obj-$(CONFIG_PPC_OF) += of_device.o diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 8793102711a..4550eb4f4fb 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -37,12 +37,12 @@ #include <asm/cputable.h> #include <asm/thread_info.h> #include <asm/rtas.h> +#include <asm/vdso_datapage.h> #ifdef CONFIG_PPC64 #include <asm/paca.h> #include <asm/lppaca.h> #include <asm/iseries/hv_lp_event.h> #include <asm/cache.h> -#include <asm/systemcfg.h> #include <asm/compat.h> #endif @@ -251,25 +251,42 @@ int main(void) DEFINE(TASK_SIZE, TASK_SIZE); DEFINE(NUM_USER_SEGMENTS, TASK_SIZE>>28); -#else /* CONFIG_PPC64 */ - /* systemcfg offsets for use by vdso */ - DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct systemcfg, tb_orig_stamp)); - DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct systemcfg, tb_ticks_per_sec)); - DEFINE(CFG_TB_TO_XS, offsetof(struct systemcfg, tb_to_xs)); - DEFINE(CFG_STAMP_XSEC, offsetof(struct systemcfg, stamp_xsec)); - DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct systemcfg, tb_update_count)); - DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct systemcfg, tz_minuteswest)); - DEFINE(CFG_TZ_DSTTIME, offsetof(struct systemcfg, tz_dsttime)); - DEFINE(CFG_SYSCALL_MAP32, offsetof(struct systemcfg, syscall_map_32)); - DEFINE(CFG_SYSCALL_MAP64, offsetof(struct systemcfg, syscall_map_64)); +#endif /* ! CONFIG_PPC64 */ - /* timeval/timezone offsets for use by vdso */ + /* datapage offsets for use by vdso */ + DEFINE(CFG_TB_ORIG_STAMP, offsetof(struct vdso_data, tb_orig_stamp)); + DEFINE(CFG_TB_TICKS_PER_SEC, offsetof(struct vdso_data, tb_ticks_per_sec)); + DEFINE(CFG_TB_TO_XS, offsetof(struct vdso_data, tb_to_xs)); + DEFINE(CFG_STAMP_XSEC, offsetof(struct vdso_data, stamp_xsec)); + DEFINE(CFG_TB_UPDATE_COUNT, offsetof(struct vdso_data, tb_update_count)); + DEFINE(CFG_TZ_MINUTEWEST, offsetof(struct vdso_data, tz_minuteswest)); + DEFINE(CFG_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime)); + DEFINE(CFG_SYSCALL_MAP32, offsetof(struct vdso_data, syscall_map_32)); + DEFINE(WTOM_CLOCK_SEC, offsetof(struct vdso_data, wtom_clock_sec)); + DEFINE(WTOM_CLOCK_NSEC, offsetof(struct vdso_data, wtom_clock_nsec)); +#ifdef CONFIG_PPC64 + DEFINE(CFG_SYSCALL_MAP64, offsetof(struct vdso_data, syscall_map_64)); DEFINE(TVAL64_TV_SEC, offsetof(struct timeval, tv_sec)); DEFINE(TVAL64_TV_USEC, offsetof(struct timeval, tv_usec)); DEFINE(TVAL32_TV_SEC, offsetof(struct compat_timeval, tv_sec)); DEFINE(TVAL32_TV_USEC, offsetof(struct compat_timeval, tv_usec)); + DEFINE(TSPC32_TV_SEC, offsetof(struct compat_timespec, tv_sec)); + DEFINE(TSPC32_TV_NSEC, offsetof(struct compat_timespec, tv_nsec)); +#else + DEFINE(TVAL32_TV_SEC, offsetof(struct timeval, tv_sec)); + DEFINE(TVAL32_TV_USEC, offsetof(struct timeval, tv_usec)); + DEFINE(TSPEC32_TV_SEC, offsetof(struct timespec, tv_sec)); + DEFINE(TSPEC32_TV_NSEC, offsetof(struct timespec, tv_nsec)); +#endif + /* timeval/timezone offsets for use by vdso */ DEFINE(TZONE_TZ_MINWEST, offsetof(struct timezone, tz_minuteswest)); DEFINE(TZONE_TZ_DSTTIME, offsetof(struct timezone, tz_dsttime)); -#endif /* CONFIG_PPC64 */ + + /* Other bits used by the vdso */ + DEFINE(CLOCK_REALTIME, CLOCK_REALTIME); + DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC); + DEFINE(NSEC_PER_SEC, NSEC_PER_SEC); + DEFINE(CLOCK_REALTIME_RES, TICK_NSEC); + return 0; } diff --git a/arch/powerpc/kernel/paca.c b/arch/powerpc/kernel/paca.c index 3cf2517c5f9..a7b68f911eb 100644 --- a/arch/powerpc/kernel/paca.c +++ b/arch/powerpc/kernel/paca.c @@ -15,17 +15,10 @@ #include <asm/processor.h> #include <asm/ptrace.h> #include <asm/page.h> -#include <asm/systemcfg.h> #include <asm/lppaca.h> #include <asm/iseries/it_lp_queue.h> #include <asm/paca.h> -static union { - struct systemcfg data; - u8 page[PAGE_SIZE]; -} systemcfg_store __attribute__((__section__(".data.page.aligned"))); -struct systemcfg *_systemcfg = &systemcfg_store.data; - /* This symbol is provided by the linker - let it fill in the paca * field correctly */ diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_ppc64.c index a1c19502fe8..7ba42a405f4 100644 --- a/arch/powerpc/kernel/proc_ppc64.c +++ b/arch/powerpc/kernel/proc_ppc64.c @@ -23,7 +23,7 @@ #include <linux/slab.h> #include <linux/kernel.h> -#include <asm/systemcfg.h> +#include <asm/vdso_datapage.h> #include <asm/rtas.h> #include <asm/uaccess.h> #include <asm/prom.h> @@ -72,7 +72,7 @@ static int __init proc_ppc64_init(void) if (!pde) return 1; pde->nlink = 1; - pde->data = _systemcfg; + pde->data = vdso_data; pde->size = PAGE_SIZE; pde->proc_fops = &page_map_fops; diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c index ae1a36449cc..7a95b8a2835 100644 --- a/arch/powerpc/kernel/rtas-proc.c +++ b/arch/powerpc/kernel/rtas-proc.c @@ -32,7 +32,6 @@ #include <asm/rtas.h> #include <asm/machdep.h> /* for ppc_md */ #include <asm/time.h> -#include <asm/systemcfg.h> /* Token for Sensors */ #define KEY_SWITCH 0x0001 diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index a754de63450..33e7f2c7f19 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -33,7 +33,7 @@ #include <asm/io.h> #include <asm/prom.h> #include <asm/processor.h> -#include <asm/systemcfg.h> +#include <asm/vdso_datapage.h> #include <asm/pgtable.h> #include <asm/smp.h> #include <asm/elf.h> @@ -564,7 +564,7 @@ void __init smp_setup_cpu_maps(void) cpu_set(cpu ^ 0x1, cpu_sibling_map[cpu]); } - _systemcfg->processorCount = num_present_cpus(); + vdso_data->processorCount = num_present_cpus(); #endif /* CONFIG_PPC64 */ } #endif /* CONFIG_SMP */ diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 6791668213e..fdbd9f9122f 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -57,7 +57,6 @@ #include <asm/lmb.h> #include <asm/iseries/it_lp_naca.h> #include <asm/firmware.h> -#include <asm/systemcfg.h> #include <asm/xmon.h> #include <asm/udbg.h> @@ -375,9 +374,8 @@ static void __init initialize_cache_info(void) DBG("Argh, can't find dcache properties ! " "sizep: %p, lsizep: %p\n", sizep, lsizep); - _systemcfg->dcache_size = ppc64_caches.dsize = size; - _systemcfg->dcache_line_size = - ppc64_caches.dline_size = lsize; + ppc64_caches.dsize = size; + ppc64_caches.dline_size = lsize; ppc64_caches.log_dline_size = __ilog2(lsize); ppc64_caches.dlines_per_page = PAGE_SIZE / lsize; @@ -393,22 +391,13 @@ static void __init initialize_cache_info(void) DBG("Argh, can't find icache properties ! " "sizep: %p, lsizep: %p\n", sizep, lsizep); - _systemcfg->icache_size = ppc64_caches.isize = size; - _systemcfg->icache_line_size = - ppc64_caches.iline_size = lsize; + ppc64_caches.isize = size; + ppc64_caches.iline_size = lsize; ppc64_caches.log_iline_size = __ilog2(lsize); ppc64_caches.ilines_per_page = PAGE_SIZE / lsize; } } - /* Add an eye catcher and the systemcfg layout version number */ - strcpy(_systemcfg->eye_catcher, "SYSTEMCFG:PPC64"); - _systemcfg->version.major = SYSTEMCFG_MAJOR; - _systemcfg->version.minor = SYSTEMCFG_MINOR; - _systemcfg->processor = mfspr(SPRN_PVR); - _systemcfg->platform = _machine; - _systemcfg->physicalMemorySize = lmb_phys_mem_size(); - DBG(" <- initialize_cache_info()\n"); } @@ -495,15 +484,14 @@ void __init setup_system(void) printk("-----------------------------------------------------\n"); printk("ppc64_pft_size = 0x%lx\n", ppc64_pft_size); - printk("ppc64_interrupt_controller = 0x%ld\n", ppc64_interrupt_controller); - printk("systemcfg = 0x%p\n", _systemcfg); - printk("systemcfg->platform = 0x%x\n", _systemcfg->platform); - printk("systemcfg->processorCount = 0x%lx\n", _systemcfg->processorCount); - printk("systemcfg->physicalMemorySize = 0x%lx\n", _systemcfg->physicalMemorySize); + printk("ppc64_interrupt_controller = 0x%ld\n", + ppc64_interrupt_controller); + printk("platform = 0x%x\n", _machine); + printk("physicalMemorySize = 0x%lx\n", lmb_phys_mem_size()); printk("ppc64_caches.dcache_line_size = 0x%x\n", - ppc64_caches.dline_size); + ppc64_caches.dline_size); printk("ppc64_caches.icache_line_size = 0x%x\n", - ppc64_caches.iline_size); + ppc64_caches.iline_size); printk("htab_address = 0x%p\n", htab_address); printk("htab_hash_mask = 0x%lx\n", htab_hash_mask); printk("-----------------------------------------------------\n"); @@ -568,33 +556,6 @@ static void __init emergency_stack_init(void) } /* - * Called from setup_arch to initialize the bitmap of available - * syscalls in the systemcfg page - */ -void __init setup_syscall_map(void) -{ - unsigned int i, count64 = 0, count32 = 0; - extern unsigned long *sys_call_table; - extern unsigned long sys_ni_syscall; - - - for (i = 0; i < __NR_syscalls; i++) { - if (sys_call_table[i*2] != sys_ni_syscall) { - count64++; - _systemcfg->syscall_map_64[i >> 5] |= - 0x80000000UL >> (i & 0x1f); - } - if (sys_call_table[i*2+1] != sys_ni_syscall) { - count32++; - _systemcfg->syscall_map_32[i >> 5] |= - 0x80000000UL >> (i & 0x1f); - } - } - printk(KERN_INFO "Syscall map setup, %d 32-bit and %d 64-bit syscalls\n", - count32, count64); -} - -/* * Called into from start_kernel, after lock_kernel has been called. * Initializes bootmem, which is unsed to manage page allocation until * mem_init is called. @@ -635,9 +596,6 @@ void __init setup_arch(char **cmdline_p) do_init_bootmem(); sparse_init(); - /* initialize the syscall map in systemcfg */ - setup_syscall_map(); - #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; #endif diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c index a7c4515f320..8bdf95b7e42 100644 --- a/arch/powerpc/kernel/signal_32.c +++ b/arch/powerpc/kernel/signal_32.c @@ -43,10 +43,10 @@ #include <asm/uaccess.h> #include <asm/cacheflush.h> #include <asm/sigcontext.h> +#include <asm/vdso.h> #ifdef CONFIG_PPC64 #include "ppc32.h" #include <asm/unistd.h> -#include <asm/vdso.h> #else #include <asm/ucontext.h> #include <asm/pgtable.h> @@ -809,14 +809,11 @@ static int handle_rt_signal(unsigned long sig, struct k_sigaction *ka, /* Save user registers on the stack */ frame = &rt_sf->uc.uc_mcontext; -#ifdef CONFIG_PPC64 if (vdso32_rt_sigtramp && current->thread.vdso_base) { if (save_user_regs(regs, frame, 0)) goto badframe; regs->link = current->thread.vdso_base + vdso32_rt_sigtramp; - } else -#endif - { + } else { if (save_user_regs(regs, frame, __NR_rt_sigreturn)) goto badframe; regs->link = (unsigned long) frame->tramp; @@ -1090,14 +1087,11 @@ static int handle_signal(unsigned long sig, struct k_sigaction *ka, || __put_user(sig, &sc->signal)) goto badframe; -#ifdef CONFIG_PPC64 if (vdso32_sigtramp && current->thread.vdso_base) { if (save_user_regs(regs, &frame->mctx, 0)) goto badframe; regs->link = current->thread.vdso_base + vdso32_sigtramp; - } else -#endif - { + } else { if (save_user_regs(regs, &frame->mctx, __NR_sigreturn)) goto badframe; regs->link = (unsigned long) frame->mctx.tramp; diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c index e28a139c29d..62dfc5b8d76 100644 --- a/arch/powerpc/kernel/smp.c +++ b/arch/powerpc/kernel/smp.c @@ -44,7 +44,7 @@ #include <asm/cputable.h> #include <asm/system.h> #include <asm/mpic.h> -#include <asm/systemcfg.h> +#include <asm/vdso_datapage.h> #ifdef CONFIG_PPC64 #include <asm/paca.h> #endif @@ -371,7 +371,7 @@ int generic_cpu_disable(void) cpu_clear(cpu, cpu_online_map); #ifdef CONFIG_PPC64 - _systemcfg->processorCount--; + vdso_data->processorCount--; fixup_irqs(cpu_online_map); #endif return 0; diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c index 850af198fb5..0f0c3a9ae2e 100644 --- a/arch/powerpc/kernel/sysfs.c +++ b/arch/powerpc/kernel/sysfs.c @@ -16,7 +16,6 @@ #include <asm/firmware.h> #include <asm/hvcall.h> #include <asm/prom.h> -#include <asm/systemcfg.h> #include <asm/paca.h> #include <asm/lppaca.h> #include <asm/machdep.h> diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c index 260b6ecd26a..070b4b458aa 100644 --- a/arch/powerpc/kernel/time.c +++ b/arch/powerpc/kernel/time.c @@ -62,8 +62,8 @@ #include <asm/irq.h> #include <asm/div64.h> #include <asm/smp.h> +#include <asm/vdso_datapage.h> #ifdef CONFIG_PPC64 -#include <asm/systemcfg.h> #include <asm/firmware.h> #endif #ifdef CONFIG_PPC_ISERIES @@ -261,7 +261,6 @@ static inline void update_gtod(u64 new_tb_stamp, u64 new_stamp_xsec, do_gtod.varp = temp_varp; do_gtod.var_idx = temp_idx; -#ifdef CONFIG_PPC64 /* * tb_update_count is used to allow the userspace gettimeofday code * to assure itself that it sees a consistent view of the tb_to_xs and @@ -271,14 +270,15 @@ static inline void update_gtod(u64 new_tb_stamp, u64 new_stamp_xsec, * tb_to_xs and stamp_xsec values are consistent. If not, then it * loops back and reads them again until this criteria is met. */ - ++(_systemcfg->tb_update_count); + ++(vdso_data->tb_update_count); smp_wmb(); - _systemcfg->tb_orig_stamp = new_tb_stamp; - _systemcfg->stamp_xsec = new_stamp_xsec; - _systemcfg->tb_to_xs = new_tb_to_xs; + vdso_data->tb_orig_stamp = new_tb_stamp; + vdso_data->stamp_xsec = new_stamp_xsec; + vdso_data->tb_to_xs = new_tb_to_xs; + vdso_data->wtom_clock_sec = wall_to_monotonic.tv_sec; + vdso_data->wtom_clock_nsec = wall_to_monotonic.tv_nsec; smp_wmb(); - ++(_systemcfg->tb_update_count); -#endif + ++(vdso_data->tb_update_count); } /* @@ -357,9 +357,8 @@ static void iSeries_tb_recal(void) do_gtod.tb_ticks_per_sec = tb_ticks_per_sec; tb_to_xs = divres.result_low; do_gtod.varp->tb_to_xs = tb_to_xs; - _systemcfg->tb_ticks_per_sec = - tb_ticks_per_sec; - _systemcfg->tb_to_xs = tb_to_xs; + vdso_data->tb_ticks_per_sec = tb_ticks_per_sec; + vdso_data->tb_to_xs = tb_to_xs; } else { printk( "Titan recalibrate: FAILED (difference > 4 percent)\n" @@ -561,10 +560,8 @@ int do_settimeofday(struct timespec *tv) new_xsec += (u64)new_sec * XSEC_PER_SEC - tb_delta_xs; update_gtod(tb_last_jiffy, new_xsec, do_gtod.varp->tb_to_xs); -#ifdef CONFIG_PPC64 - _systemcfg->tz_minuteswest = sys_tz.tz_minuteswest; - _systemcfg->tz_dsttime = sys_tz.tz_dsttime; -#endif + vdso_data->tz_minuteswest = sys_tz.tz_minuteswest; + vdso_data->tz_dsttime = sys_tz.tz_dsttime; write_sequnlock_irqrestore(&xtime_lock, flags); clock_was_set(); @@ -713,13 +710,12 @@ void __init time_init(void) do_gtod.tb_ticks_per_sec = tb_ticks_per_sec; do_gtod.varp->tb_to_xs = tb_to_xs; do_gtod.tb_to_us = tb_to_us; -#ifdef CONFIG_PPC64 - _systemcfg->tb_orig_stamp = tb_last_jiffy; - _systemcfg->tb_update_count = 0; - _systemcfg->tb_ticks_per_sec = tb_ticks_per_sec; - _systemcfg->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC; - _systemcfg->tb_to_xs = tb_to_xs; -#endif + + vdso_data->tb_orig_stamp = tb_last_jiffy; + vdso_data->tb_update_count = 0; + vdso_data->tb_ticks_per_sec = tb_ticks_per_sec; + vdso_data->stamp_xsec = xtime.tv_sec * XSEC_PER_SEC; + vdso_data->tb_to_xs = tb_to_xs; time_freq = 0; diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c index 2020bb7648f..1511454c469 100644 --- a/arch/powerpc/kernel/traps.c +++ b/arch/powerpc/kernel/traps.c @@ -49,7 +49,6 @@ #ifdef CONFIG_PPC64 #include <asm/firmware.h> #include <asm/processor.h> -#include <asm/systemcfg.h> #endif #ifdef CONFIG_PPC64 /* XXX */ diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c new file mode 100644 index 00000000000..0d4d8bec0df --- /dev/null +++ b/arch/powerpc/kernel/vdso.c @@ -0,0 +1,746 @@ +/* + * linux/arch/ppc64/kernel/vdso.c + * + * Copyright (C) 2004 Benjamin Herrenschmidt, IBM Corp. + * <benh@kernel.crashing.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#include <linux/config.h> +#include <linux/module.h> +#include <linux/errno.h> +#include <linux/sched.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/smp.h> +#include <linux/smp_lock.h> +#include <linux/stddef.h> +#include <linux/unistd.h> +#include <linux/slab.h> +#include <linux/user.h> +#include <linux/elf.h> +#include <linux/security.h> +#include <linux/bootmem.h> + +#include <asm/pgtable.h> +#include <asm/system.h> +#include <asm/processor.h> +#include <asm/mmu.h> +#include <asm/mmu_context.h> +#include <asm/lmb.h> +#include <asm/machdep.h> +#include <asm/cputable.h> +#include <asm/sections.h> +#include <asm/vdso.h> +#include <asm/vdso_datapage.h> + +#undef DEBUG + +#ifdef DEBUG +#define DBG(fmt...) printk(fmt) +#else +#define DBG(fmt...) +#endif + +/* Max supported size for symbol names */ +#define MAX_SYMNAME 64 + +extern char vdso32_start, vdso32_end; +static void *vdso32_kbase = &vdso32_start; +unsigned int vdso32_pages; +unsigned long vdso32_sigtramp; +unsigned long vdso32_rt_sigtramp; + +#ifdef CONFIG_PPC64 +extern char vdso64_start, vdso64_end; +static void *vdso64_kbase = &vdso64_start; +unsigned int vdso64_pages; +unsigned long vdso64_rt_sigtramp; +#endif /* CONFIG_PPC64 */ + +/* + * The vdso data page (aka. systemcfg for old ppc64 fans) is here. + * Once the early boot kernel code no longer needs to muck around + * with it, it will become dynamically allocated + */ +static union { + struct vdso_data data; + u8 page[PAGE_SIZE]; +} vdso_data_store __attribute__((__section__(".data.page_aligned"))); +struct vdso_data *vdso_data = &vdso_data_store.data; + +/* Format of the patch table */ +struct vdso_patch_def +{ + unsigned long ftr_mask, ftr_value; + const char *gen_name; + const char *fix_name; +}; + +/* Table of functions to patch based on the CPU type/revision + * + * Currently, we only change sync_dicache to do nothing on processors + * with a coherent icache + */ +static struct vdso_patch_def vdso_patches[] = { + { + CPU_FTR_COHERENT_ICACHE, CPU_FTR_COHERENT_ICACHE, + "__kernel_sync_dicache", "__kernel_sync_dicache_p5" + }, + { + CPU_FTR_USE_TB, 0, + "__kernel_gettimeofday", NULL + }, +}; + +/* + * Some infos carried around for each of them during parsing at + * boot time. + */ +struct lib32_elfinfo +{ + Elf32_Ehdr *hdr; /* ptr to ELF */ + Elf32_Sym *dynsym; /* ptr to .dynsym section */ + unsigned long dynsymsize; /* size of .dynsym section */ + char *dynstr; /* ptr to .dynstr section */ + unsigned long text; /* offset of .text section in .so */ +}; + +struct lib64_elfinfo +{ + Elf64_Ehdr *hdr; + Elf64_Sym *dynsym; + unsigned long dynsymsize; + char *dynstr; + unsigned long text; +}; + + +#ifdef __DEBUG +static void dump_one_vdso_page(struct page *pg, struct page *upg) +{ + printk("kpg: %p (c:%d,f:%08lx)", __va(page_to_pfn(pg) << PAGE_SHIFT), + page_count(pg), + pg->flags); + if (upg/* && pg != upg*/) { + printk(" upg: %p (c:%d,f:%08lx)", __va(page_to_pfn(upg) + << PAGE_SHIFT), + page_count(upg), + upg->flags); + } + printk("\n"); +} + +static void dump_vdso_pages(struct vm_area_struct * vma) +{ + int i; + + if (!vma || test_thread_flag(TIF_32BIT)) { + printk("vDSO32 @ %016lx:\n", (unsigned long)vdso32_kbase); + for (i=0; i<vdso32_pages; i++) { + struct page *pg = virt_to_page(vdso32_kbase + + i*PAGE_SIZE); + struct page *upg = (vma && vma->vm_mm) ? + follow_page(vma->vm_mm, vma->vm_start + + i*PAGE_SIZE, 0) + : NULL; + dump_one_vdso_page(pg, upg); + } + } + if (!vma || !test_thread_flag(TIF_32BIT)) { + printk("vDSO64 @ %016lx:\n", (unsigned long)vdso64_kbase); + for (i=0; i<vdso64_pages; i++) { + struct page *pg = virt_to_page(vdso64_kbase + + i*PAGE_SIZE); + struct page *upg = (vma && vma->vm_mm) ? + follow_page(vma->vm_mm, vma->vm_start + + i*PAGE_SIZE, 0) + : NULL; + dump_one_vdso_page(pg, upg); + } + } +} +#endif /* DEBUG */ + +/* + * Keep a dummy vma_close for now, it will prevent VMA merging. + */ +static void vdso_vma_close(struct vm_area_struct * vma) +{ +} + +/* + * Our nopage() function, maps in the actual vDSO kernel pages, they will + * be mapped read-only by do_no_page(), and eventually COW'ed, either + * right away for an initial write access, or by do_wp_page(). + */ +static struct page * vdso_vma_nopage(struct vm_area_struct * vma, + unsigned long address, int *type) +{ + unsigned long offset = address - vma->vm_start; + struct page *pg; +#ifdef CONFIG_PPC64 + void *vbase = test_thread_flag(TIF_32BIT) ? + vdso32_kbase : vdso64_kbase; +#else + void *vbase = vdso32_kbase; +#endif + + DBG("vdso_vma_nopage(current: %s, address: %016lx, off: %lx)\n", + current->comm, address, offset); + + if (address < vma->vm_start || address > vma->vm_end) + return NOPAGE_SIGBUS; + + /* + * Last page is systemcfg. + */ + if ((vma->vm_end - address) <= PAGE_SIZE) + pg = virt_to_page(vdso_data); + else + pg = virt_to_page(vbase + offset); + + get_page(pg); + DBG(" ->page count: %d\n", page_count(pg)); + + return pg; +} + +static struct vm_operations_struct vdso_vmops = { + .close = vdso_vma_close, + .nopage = vdso_vma_nopage, +}; + +/* + * This is called from binfmt_elf, we create the special vma for the + * vDSO and insert it into the mm struct tree + */ +int arch_setup_additional_pages(struct linux_binprm *bprm, + int executable_stack) +{ + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + unsigned long vdso_pages; + unsigned long vdso_base; + +#ifdef CONFIG_PPC64 + if (test_thread_flag(TIF_32BIT)) { + vdso_pages = vdso32_pages; + vdso_base = VDSO32_MBASE; + } else { + vdso_pages = vdso64_pages; + vdso_base = VDSO64_MBASE; + } +#else + vdso_pages = vdso32_pages; + vdso_base = VDSO32_MBASE; +#endif + + current->thread.vdso_base = 0; + + /* vDSO has a problem and was disabled, just don't "enable" it for the + * process + */ + if (vdso_pages == 0) + return 0; + + vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL); + if (vma == NULL) + return -ENOMEM; + + memset(vma, 0, sizeof(*vma)); + + /* Add a page to the vdso size for the data page */ + vdso_pages ++; + + /* + * pick a base |