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da7196e1f9
The Thumb-2 instruction set does not provide an encoding for sub pc, r0, #95 as present in the rmb() definition used by perf. This results in compilation failure when using a compiler targetting an instruction set other than ARM. This patch redefines rmb() for ARM by casting the address of the kuser helper to a function pointer, therefore getting the compiler to take care of making the call. Patch taken against tip/master. Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Russell King - ARM Linux <linux@arm.linux.org.uk> Cc: Jamie Iles <jamie.iles@picochip.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <1267616878-2154-1-git-send-email-will.deacon@arm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
#ifndef _PERF_PERF_H
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#define _PERF_PERF_H
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#if defined(__i386__)
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#include "../../arch/x86/include/asm/unistd.h"
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#define rmb() asm volatile("lock; addl $0,0(%%esp)" ::: "memory")
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#define cpu_relax() asm volatile("rep; nop" ::: "memory");
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#endif
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#if defined(__x86_64__)
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#include "../../arch/x86/include/asm/unistd.h"
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#define rmb() asm volatile("lfence" ::: "memory")
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#define cpu_relax() asm volatile("rep; nop" ::: "memory");
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#endif
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#ifdef __powerpc__
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#include "../../arch/powerpc/include/asm/unistd.h"
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#define rmb() asm volatile ("sync" ::: "memory")
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#define cpu_relax() asm volatile ("" ::: "memory");
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#endif
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#ifdef __s390__
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#include "../../arch/s390/include/asm/unistd.h"
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#define rmb() asm volatile("bcr 15,0" ::: "memory")
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#define cpu_relax() asm volatile("" ::: "memory");
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#endif
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#ifdef __sh__
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#include "../../arch/sh/include/asm/unistd.h"
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#if defined(__SH4A__) || defined(__SH5__)
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# define rmb() asm volatile("synco" ::: "memory")
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#else
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# define rmb() asm volatile("" ::: "memory")
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#endif
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#define cpu_relax() asm volatile("" ::: "memory")
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#endif
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#ifdef __hppa__
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#include "../../arch/parisc/include/asm/unistd.h"
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#define rmb() asm volatile("" ::: "memory")
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#define cpu_relax() asm volatile("" ::: "memory");
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#endif
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#ifdef __sparc__
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#include "../../arch/sparc/include/asm/unistd.h"
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#define rmb() asm volatile("":::"memory")
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#define cpu_relax() asm volatile("":::"memory")
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#endif
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#ifdef __alpha__
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#include "../../arch/alpha/include/asm/unistd.h"
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#define rmb() asm volatile("mb" ::: "memory")
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#define cpu_relax() asm volatile("" ::: "memory")
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#endif
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#ifdef __ia64__
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#include "../../arch/ia64/include/asm/unistd.h"
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#define rmb() asm volatile ("mf" ::: "memory")
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#define cpu_relax() asm volatile ("hint @pause" ::: "memory")
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#endif
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#ifdef __arm__
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#include "../../arch/arm/include/asm/unistd.h"
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/*
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* Use the __kuser_memory_barrier helper in the CPU helper page. See
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* arch/arm/kernel/entry-armv.S in the kernel source for details.
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*/
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#define rmb() ((void(*)(void))0xffff0fa0)()
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#define cpu_relax() asm volatile("":::"memory")
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#endif
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#include <time.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/syscall.h>
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#include "../../include/linux/perf_event.h"
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#include "util/types.h"
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/*
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* prctl(PR_TASK_PERF_EVENTS_DISABLE) will (cheaply) disable all
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* counters in the current task.
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*/
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#define PR_TASK_PERF_EVENTS_DISABLE 31
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#define PR_TASK_PERF_EVENTS_ENABLE 32
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#ifndef NSEC_PER_SEC
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# define NSEC_PER_SEC 1000000000ULL
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#endif
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static inline unsigned long long rdclock(void)
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{
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struct timespec ts;
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clock_gettime(CLOCK_MONOTONIC, &ts);
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return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
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}
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/*
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* Pick up some kernel type conventions:
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*/
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#define __user
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#define asmlinkage
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#define __used __attribute__((__unused__))
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#define min(x, y) ({ \
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typeof(x) _min1 = (x); \
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typeof(y) _min2 = (y); \
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(void) (&_min1 == &_min2); \
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_min1 < _min2 ? _min1 : _min2; })
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static inline int
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sys_perf_event_open(struct perf_event_attr *attr,
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pid_t pid, int cpu, int group_fd,
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unsigned long flags)
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{
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attr->size = sizeof(*attr);
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return syscall(__NR_perf_event_open, attr, pid, cpu,
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group_fd, flags);
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}
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#define MAX_COUNTERS 256
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#define MAX_NR_CPUS 256
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struct ip_callchain {
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u64 nr;
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u64 ips[0];
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};
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#endif
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