diff options
Diffstat (limited to 'arch/tile/kernel/vdso')
| -rw-r--r-- | arch/tile/kernel/vdso/Makefile | 117 | ||||
| -rw-r--r-- | arch/tile/kernel/vdso/vdso.S | 28 | ||||
| -rw-r--r-- | arch/tile/kernel/vdso/vdso.lds.S | 89 | ||||
| -rw-r--r-- | arch/tile/kernel/vdso/vdso32.S | 28 | ||||
| -rw-r--r-- | arch/tile/kernel/vdso/vgettimeofday.c | 198 | ||||
| -rw-r--r-- | arch/tile/kernel/vdso/vrt_sigreturn.S | 30 |
6 files changed, 0 insertions, 490 deletions
diff --git a/arch/tile/kernel/vdso/Makefile b/arch/tile/kernel/vdso/Makefile deleted file mode 100644 index b596a7396382..000000000000 --- a/arch/tile/kernel/vdso/Makefile +++ /dev/null @@ -1,117 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# Symbols present in the vdso -vdso-syms = rt_sigreturn gettimeofday - -# Files to link into the vdso -obj-vdso = $(patsubst %, v%.o, $(vdso-syms)) - -# Build rules -targets := $(obj-vdso) vdso.so vdso.so.dbg vdso.lds vdso-dummy.o -obj-vdso := $(addprefix $(obj)/, $(obj-vdso)) - -# vdso32 is only for tilegx -m32 compat task. -VDSO32-$(CONFIG_COMPAT) := y - -obj-y += vdso.o vdso-syms.o -obj-$(VDSO32-y) += vdso32.o -CPPFLAGS_vdso.lds += -P -C -U$(ARCH) - -# vDSO code runs in userspace and -pg doesn't help with profiling anyway. -CFLAGS_REMOVE_vdso.o = -pg -CFLAGS_REMOVE_vdso32.o = -pg -CFLAGS_REMOVE_vrt_sigreturn.o = -pg -CFLAGS_REMOVE_vrt_sigreturn32.o = -pg -CFLAGS_REMOVE_vgettimeofday.o = -pg -CFLAGS_REMOVE_vgettimeofday32.o = -pg - -ifdef CONFIG_FEEDBACK_COLLECT -# vDSO code runs in userspace, not collecting feedback data. -CFLAGS_REMOVE_vdso.o = -ffeedback-generate -CFLAGS_REMOVE_vdso32.o = -ffeedback-generate -CFLAGS_REMOVE_vrt_sigreturn.o = -ffeedback-generate -CFLAGS_REMOVE_vrt_sigreturn32.o = -ffeedback-generate -CFLAGS_REMOVE_vgettimeofday.o = -ffeedback-generate -CFLAGS_REMOVE_vgettimeofday32.o = -ffeedback-generate -endif - -# Disable gcov profiling for VDSO code -GCOV_PROFILE := n - -# Force dependency -$(obj)/vdso.o: $(obj)/vdso.so - -# link rule for the .so file, .lds has to be first -SYSCFLAGS_vdso.so.dbg = $(c_flags) -$(obj)/vdso.so.dbg: $(src)/vdso.lds $(obj-vdso) FORCE - $(call if_changed,vdsold) - -# We also create a special relocatable object that should mirror the symbol -# table and layout of the linked DSO. With ld -R we can then refer to -# these symbols in the kernel code rather than hand-coded addresses. - -SYSCFLAGS_vdso.so.dbg = -shared -s -Wl,-soname=linux-vdso.so.1 \ - $(call cc-ldoption, -Wl$(comma)--hash-style=both) -SYSCFLAGS_vdso_dummy.o = -r -$(obj)/vdso-dummy.o: $(src)/vdso.lds $(obj)/vrt_sigreturn.o FORCE - $(call if_changed,vdsold) - -LDFLAGS_vdso-syms.o := -r -R -$(obj)/vdso-syms.o: $(obj)/vdso-dummy.o FORCE - $(call if_changed,ld) - -# strip rule for the .so file -$(obj)/%.so: OBJCOPYFLAGS := -S -$(obj)/%.so: $(obj)/%.so.dbg FORCE - $(call if_changed,objcopy) - -# actual build commands -# The DSO images are built using a special linker script -# Add -lgcc so tilepro gets static muldi3 and lshrdi3 definitions. -# Make sure only to export the intended __vdso_xxx symbol offsets. -quiet_cmd_vdsold = VDSOLD $@ - cmd_vdsold = $(CC) $(KCFLAGS) -nostdlib $(SYSCFLAGS_$(@F)) \ - -Wl,-T,$(filter-out FORCE,$^) -o $@.tmp -lgcc && \ - $(CROSS_COMPILE)objcopy \ - $(patsubst %, -G __vdso_%, $(vdso-syms)) $@.tmp $@ - -# install commands for the unstripped file -quiet_cmd_vdso_install = INSTALL $@ - cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@ - -vdso.so: $(obj)/vdso.so.dbg - @mkdir -p $(MODLIB)/vdso - $(call cmd,vdso_install) - -vdso32.so: $(obj)/vdso32.so.dbg - $(call cmd,vdso_install) - -vdso_install: vdso.so -vdso32_install: vdso32.so - - -KBUILD_AFLAGS_32 := $(filter-out -m64,$(KBUILD_AFLAGS)) -KBUILD_AFLAGS_32 += -m32 -s -KBUILD_CFLAGS_32 := $(filter-out -m64,$(KBUILD_CFLAGS)) -KBUILD_CFLAGS_32 += -m32 -fPIC -shared - -obj-vdso32 = $(patsubst %, v%32.o, $(vdso-syms)) - -targets += $(obj-vdso32) vdso32.so vdso32.so.dbg -obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32)) - -$(obj-vdso32:%=%): KBUILD_AFLAGS = $(KBUILD_AFLAGS_32) -$(obj-vdso32:%=%): KBUILD_CFLAGS = $(KBUILD_CFLAGS_32) - -$(obj)/vgettimeofday32.o: $(obj)/vgettimeofday.c FORCE - $(call if_changed_rule,cc_o_c) - -$(obj)/vrt_sigreturn32.o: $(obj)/vrt_sigreturn.S FORCE - $(call if_changed,as_o_S) - -# Force dependency -$(obj)/vdso32.o: $(obj)/vdso32.so - -SYSCFLAGS_vdso32.so.dbg = -m32 -shared -s -Wl,-soname=linux-vdso32.so.1 \ - $(call cc-ldoption, -Wl$(comma)--hash-style=both) -$(obj)/vdso32.so.dbg: $(src)/vdso.lds $(obj-vdso32) FORCE - $(call if_changed,vdsold) diff --git a/arch/tile/kernel/vdso/vdso.S b/arch/tile/kernel/vdso/vdso.S deleted file mode 100644 index 3467adb41630..000000000000 --- a/arch/tile/kernel/vdso/vdso.S +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright 2012 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#include <linux/init.h> -#include <linux/linkage.h> -#include <asm/page.h> - - __PAGE_ALIGNED_DATA - - .global vdso_start, vdso_end - .align PAGE_SIZE -vdso_start: - .incbin "arch/tile/kernel/vdso/vdso.so" - .align PAGE_SIZE -vdso_end: - - .previous diff --git a/arch/tile/kernel/vdso/vdso.lds.S b/arch/tile/kernel/vdso/vdso.lds.S deleted file mode 100644 index 731529f3f06f..000000000000 --- a/arch/tile/kernel/vdso/vdso.lds.S +++ /dev/null @@ -1,89 +0,0 @@ -/* - * Copyright 2012 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#define VDSO_VERSION_STRING LINUX_2.6 - - -OUTPUT_ARCH(tile) - -/* The ELF entry point can be used to set the AT_SYSINFO value. */ -ENTRY(__vdso_rt_sigreturn); - - -SECTIONS -{ - . = SIZEOF_HEADERS; - - .hash : { *(.hash) } :text - .gnu.hash : { *(.gnu.hash) } - .dynsym : { *(.dynsym) } - .dynstr : { *(.dynstr) } - .gnu.version : { *(.gnu.version) } - .gnu.version_d : { *(.gnu.version_d) } - .gnu.version_r : { *(.gnu.version_r) } - - .note : { *(.note.*) } :text :note - .dynamic : { *(.dynamic) } :text :dynamic - - .eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr - .eh_frame : { KEEP (*(.eh_frame)) } :text - - .rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) } - - /* - * This linker script is used both with -r and with -shared. - * For the layouts to match, we need to skip more than enough - * space for the dynamic symbol table et al. If this amount - * is insufficient, ld -shared will barf. Just increase it here. - */ - . = 0x1000; - .text : { *(.text .text.*) } :text - - .data : { - *(.got.plt) *(.got) - *(.data .data.* .gnu.linkonce.d.*) - *(.dynbss) - *(.bss .bss.* .gnu.linkonce.b.*) - } -} - - -/* - * We must supply the ELF program headers explicitly to get just one - * PT_LOAD segment, and set the flags explicitly to make segments read-only. - */ -PHDRS -{ - text PT_LOAD FLAGS(5) FILEHDR PHDRS; /* PF_R|PF_X */ - dynamic PT_DYNAMIC FLAGS(4); /* PF_R */ - note PT_NOTE FLAGS(4); /* PF_R */ - eh_frame_hdr PT_GNU_EH_FRAME; -} - - -/* - * This controls what userland symbols we export from the vDSO. - */ -VERSION -{ - VDSO_VERSION_STRING { - global: - __vdso_rt_sigreturn; - __vdso_gettimeofday; - gettimeofday; - __vdso_clock_gettime; - clock_gettime; - local:*; - }; -} diff --git a/arch/tile/kernel/vdso/vdso32.S b/arch/tile/kernel/vdso/vdso32.S deleted file mode 100644 index 1d1ac3257e11..000000000000 --- a/arch/tile/kernel/vdso/vdso32.S +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright 2013 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#include <linux/init.h> -#include <linux/linkage.h> -#include <asm/page.h> - - __PAGE_ALIGNED_DATA - - .global vdso32_start, vdso32_end - .align PAGE_SIZE -vdso32_start: - .incbin "arch/tile/kernel/vdso/vdso32.so" - .align PAGE_SIZE -vdso32_end: - - .previous diff --git a/arch/tile/kernel/vdso/vgettimeofday.c b/arch/tile/kernel/vdso/vgettimeofday.c deleted file mode 100644 index e63310c49742..000000000000 --- a/arch/tile/kernel/vdso/vgettimeofday.c +++ /dev/null @@ -1,198 +0,0 @@ -/* - * Copyright 2012 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#define VDSO_BUILD /* avoid some shift warnings for -m32 in <asm/page.h> */ -#include <linux/time.h> -#include <asm/timex.h> -#include <asm/unistd.h> -#include <asm/vdso.h> - -#if CHIP_HAS_SPLIT_CYCLE() -static inline cycles_t get_cycles_inline(void) -{ - unsigned int high = __insn_mfspr(SPR_CYCLE_HIGH); - unsigned int low = __insn_mfspr(SPR_CYCLE_LOW); - unsigned int high2 = __insn_mfspr(SPR_CYCLE_HIGH); - - while (unlikely(high != high2)) { - low = __insn_mfspr(SPR_CYCLE_LOW); - high = high2; - high2 = __insn_mfspr(SPR_CYCLE_HIGH); - } - - return (((cycles_t)high) << 32) | low; -} -#define get_cycles get_cycles_inline -#endif - -struct syscall_return_value { - long value; - long error; -}; - -/* - * Find out the vDSO data page address in the process address space. - */ -inline unsigned long get_datapage(void) -{ - unsigned long ret; - - /* vdso data page located in the 2nd vDSO page. */ - asm volatile ("lnk %0" : "=r"(ret)); - ret &= ~(PAGE_SIZE - 1); - ret += PAGE_SIZE; - - return ret; -} - -static inline u64 vgetsns(struct vdso_data *vdso) -{ - return ((get_cycles() - vdso->cycle_last) & vdso->mask) * vdso->mult; -} - -static inline int do_realtime(struct vdso_data *vdso, struct timespec *ts) -{ - unsigned count; - u64 ns; - - do { - count = raw_read_seqcount_begin(&vdso->tb_seq); - ts->tv_sec = vdso->wall_time_sec; - ns = vdso->wall_time_snsec; - ns += vgetsns(vdso); - ns >>= vdso->shift; - } while (unlikely(read_seqcount_retry(&vdso->tb_seq, count))); - - ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); - ts->tv_nsec = ns; - - return 0; -} - -static inline int do_monotonic(struct vdso_data *vdso, struct timespec *ts) -{ - unsigned count; - u64 ns; - - do { - count = raw_read_seqcount_begin(&vdso->tb_seq); - ts->tv_sec = vdso->monotonic_time_sec; - ns = vdso->monotonic_time_snsec; - ns += vgetsns(vdso); - ns >>= vdso->shift; - } while (unlikely(read_seqcount_retry(&vdso->tb_seq, count))); - - ts->tv_sec += __iter_div_u64_rem(ns, NSEC_PER_SEC, &ns); - ts->tv_nsec = ns; - - return 0; -} - -static inline int do_realtime_coarse(struct vdso_data *vdso, - struct timespec *ts) -{ - unsigned count; - - do { - count = raw_read_seqcount_begin(&vdso->tb_seq); - ts->tv_sec = vdso->wall_time_coarse_sec; - ts->tv_nsec = vdso->wall_time_coarse_nsec; - } while (unlikely(read_seqcount_retry(&vdso->tb_seq, count))); - - return 0; -} - -static inline int do_monotonic_coarse(struct vdso_data *vdso, - struct timespec *ts) -{ - unsigned count; - - do { - count = raw_read_seqcount_begin(&vdso->tb_seq); - ts->tv_sec = vdso->monotonic_time_coarse_sec; - ts->tv_nsec = vdso->monotonic_time_coarse_nsec; - } while (unlikely(read_seqcount_retry(&vdso->tb_seq, count))); - - return 0; -} - -struct syscall_return_value __vdso_gettimeofday(struct timeval *tv, - struct timezone *tz) -{ - struct syscall_return_value ret = { 0, 0 }; - unsigned count; - struct vdso_data *vdso = (struct vdso_data *)get_datapage(); - - /* The use of the timezone is obsolete, normally tz is NULL. */ - if (unlikely(tz != NULL)) { - do { - count = raw_read_seqcount_begin(&vdso->tz_seq); - tz->tz_minuteswest = vdso->tz_minuteswest; - tz->tz_dsttime = vdso->tz_dsttime; - } while (unlikely(read_seqcount_retry(&vdso->tz_seq, count))); - } - - if (unlikely(tv == NULL)) - return ret; - - do_realtime(vdso, (struct timespec *)tv); - tv->tv_usec /= 1000; - - return ret; -} - -int gettimeofday(struct timeval *tv, struct timezone *tz) - __attribute__((weak, alias("__vdso_gettimeofday"))); - -static struct syscall_return_value vdso_fallback_gettime(long clock, - struct timespec *ts) -{ - struct syscall_return_value ret; - __asm__ __volatile__ ( - "swint1" - : "=R00" (ret.value), "=R01" (ret.error) - : "R10" (__NR_clock_gettime), "R00" (clock), "R01" (ts) - : "r2", "r3", "r4", "r5", "r6", "r7", - "r8", "r9", "r11", "r12", "r13", "r14", "r15", - "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", - "r24", "r25", "r26", "r27", "r28", "r29", "memory"); - return ret; -} - -struct syscall_return_value __vdso_clock_gettime(clockid_t clock, - struct timespec *ts) -{ - struct vdso_data *vdso = (struct vdso_data *)get_datapage(); - struct syscall_return_value ret = { 0, 0 }; - - switch (clock) { - case CLOCK_REALTIME: - do_realtime(vdso, ts); - return ret; - case CLOCK_MONOTONIC: - do_monotonic(vdso, ts); - return ret; - case CLOCK_REALTIME_COARSE: - do_realtime_coarse(vdso, ts); - return ret; - case CLOCK_MONOTONIC_COARSE: - do_monotonic_coarse(vdso, ts); - return ret; - default: - return vdso_fallback_gettime(clock, ts); - } -} - -int clock_gettime(clockid_t clock, struct timespec *ts) - __attribute__((weak, alias("__vdso_clock_gettime"))); diff --git a/arch/tile/kernel/vdso/vrt_sigreturn.S b/arch/tile/kernel/vdso/vrt_sigreturn.S deleted file mode 100644 index 6326caf4a039..000000000000 --- a/arch/tile/kernel/vdso/vrt_sigreturn.S +++ /dev/null @@ -1,30 +0,0 @@ -/* - * Copyright 2012 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - */ - -#include <linux/linkage.h> -#include <arch/abi.h> -#include <asm/unistd.h> - -/* - * Note that libc has a copy of this function that it uses to compare - * against the PC when a stack backtrace ends, so if this code is - * changed, the libc implementation(s) should also be updated. - */ -ENTRY(__vdso_rt_sigreturn) - moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigreturn - swint1 - /* We don't use ENDPROC to avoid tagging this symbol as FUNC, - * which confuses the perf tool. - */ - END(__vdso_rt_sigreturn) |