forked from luck/tmp_suning_uos_patched
011532379b
In preparation for checking that the vectors page on the ARM architecture, refactor the find_vdso_map() function to accept finding an arbitrary string and create a dedicated helper function for that under util/find-map.c and update the filename to find-map.c and all references to it: perf-read-vdso.c and util/vdso.c. Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Chris Healy <cphealy@gmail.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Lucas Stach <l.stach@pengutronix.de> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Cc: Russell King <rmk+kernel@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Thomas Richter <tmricht@linux.ibm.com> Link: http://lkml.kernel.org/r/20181221034337.26663-2-f.fainelli@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
31 lines
592 B
C
31 lines
592 B
C
// SPDX-License-Identifier: GPL-2.0
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static int find_map(void **start, void **end, const char *name)
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{
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FILE *maps;
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char line[128];
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int found = 0;
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maps = fopen("/proc/self/maps", "r");
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if (!maps) {
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fprintf(stderr, "cannot open maps\n");
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return -1;
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}
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while (!found && fgets(line, sizeof(line), maps)) {
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int m = -1;
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/* We care only about private r-x mappings. */
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if (2 != sscanf(line, "%p-%p r-xp %*x %*x:%*x %*u %n",
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start, end, &m))
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continue;
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if (m < 0)
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continue;
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if (!strncmp(&line[m], name, strlen(name)))
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found = 1;
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}
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fclose(maps);
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return !found;
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}
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