aboutsummaryrefslogtreecommitdiff
path: root/libraries/libprof/profil.c
diff options
context:
space:
mode:
authorPaul Selkirk <paul@psgd.org>2019-04-09 17:45:13 -0400
committerPaul Selkirk <paul@psgd.org>2019-04-09 17:45:13 -0400
commite60a67af1145e17f567c351e081c8546fbdcf6c8 (patch)
tree3d10c4ec3406377508c99beb1fb0c233f514a9c0 /libraries/libprof/profil.c
parent07af68c08baefbced001a0081256cb1fff8ed491 (diff)
parente203f797dddfcd03419e7ac336a86a6186fce0c1 (diff)
Merge branch 'master' into js_keywrap
Diffstat (limited to 'libraries/libprof/profil.c')
-rw-r--r--libraries/libprof/profil.c96
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);
-}
-