diff options
Diffstat (limited to 'libraries/libprof/profil.c')
-rw-r--r-- | libraries/libprof/profil.c | 96 |
1 files changed, 0 insertions, 96 deletions
diff --git a/libraries/libprof/profil.c b/libraries/libprof/profil.c deleted file mode 100644 index b0d8d55..0000000 --- a/libraries/libprof/profil.c +++ /dev/null @@ -1,96 +0,0 @@ -/* profil.c -- win32 profil.c equivalent - - Copyright 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. - - This file is part of Cygwin. - - This software is a copyrighted work licensed under the terms of the - Cygwin license. Please consult the file "CYGWIN_LICENSE" for - details. */ - -/* - * This file is taken from Cygwin distribution, adapted to be used for bare embedded targets. - */ -#include <stdio.h> -#include <sys/types.h> -#include <errno.h> -#include <math.h> -#include "profil.h" -#include <string.h> - -#include "stm32f4xx_hal.h" /* __get_MSP */ - -/* global profinfo for profil() call */ -static struct profinfo prof = { - PROFILE_NOT_INIT, 0, 0, 0, 0 -}; - -/* sample the current program counter */ -void profil_callback(void) { - if (prof.state == PROFILE_ON) { - /* The interrupt mechanism pushes xPSR, PC, LR, R12, and R3-R0 onto the - * stack, so PC is the 6th word from the top at that point. However, the - * normal function entry code pushes registers as well, so the stack - * offset right now depends on the call tree that got us here. - */ - size_t pc = (size_t)((uint32_t *)__get_MSP())[6 + 6]; - if (pc >= prof.lowpc && pc < prof.highpc) { - size_t idx = PROFIDX (pc, prof.lowpc, prof.scale); - prof.counter[idx]++; - } - } -} - -/* Stop profiling to the profiling buffer pointed to by p. */ -static int profile_off (struct profinfo *p) { - p->state = PROFILE_OFF; - return 0; -} - -/* Create a timer thread and pass it a pointer P to the profiling buffer. */ -static int profile_on (struct profinfo *p) { - p->state = PROFILE_ON; - return 0; /* ok */ -} - -/* - * start or stop profiling - * - * profiling goes into the SAMPLES buffer of size SIZE (which is treated - * as an array of unsigned shorts of size size/2) - * - * each bin represents a range of pc addresses from OFFSET. The number - * of pc addresses in a bin depends on SCALE. (A scale of 65536 maps - * each bin to two addresses, A scale of 32768 maps each bin to 4 addresses, - * a scale of 1 maps each bin to 128k address). Scale may be 1 - 65536, - * or zero to turn off profiling - */ -int profile_ctl (struct profinfo *p, char *samples, size_t size, size_t offset, unsigned int scale) { - size_t maxbin; - - if (scale > 65536) { - errno = EINVAL; - return -1; - } - profile_off(p); - if (scale) { - memset(samples, 0, size); - memset(p, 0, sizeof *p); - maxbin = size >> 1; - prof.counter = (unsigned short*)samples; - prof.lowpc = offset; - prof.highpc = PROFADDR(maxbin, offset, scale); - prof.scale = scale; - return profile_on(p); - } - return 0; -} - -/* Equivalent to unix profil() - Every SLEEPTIME interval, the user's program counter (PC) is examined: - offset is subtracted and the result is multiplied by scale. - The word pointed to by this address is incremented. */ -int profil (char *samples, size_t size, size_t offset, unsigned int scale) { - return profile_ctl (&prof, samples, size, offset, scale); -} - |