From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- tools/perf/arch/s390/util/machine.c | 52 +++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 tools/perf/arch/s390/util/machine.c (limited to 'tools/perf/arch/s390/util/machine.c') diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c new file mode 100644 index 000000000..c8c86a0c9 --- /dev/null +++ b/tools/perf/arch/s390/util/machine.c @@ -0,0 +1,52 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include "util.h" +#include "machine.h" +#include "api/fs/fs.h" +#include "debug.h" +#include "symbol.h" + +int arch__fix_module_text_start(u64 *start, u64 *size, const char *name) +{ + u64 m_start = *start; + char path[PATH_MAX]; + + snprintf(path, PATH_MAX, "module/%.*s/sections/.text", + (int)strlen(name) - 2, name + 1); + if (sysfs__read_ull(path, (unsigned long long *)start) < 0) { + pr_debug2("Using module %s start:%#lx\n", path, m_start); + *start = m_start; + } else { + /* Successful read of the modules segment text start address. + * Calculate difference between module start address + * in memory and module text segment start address. + * For example module load address is 0x3ff8011b000 + * (from /proc/modules) and module text segment start + * address is 0x3ff8011b870 (from file above). + * + * Adjust the module size and subtract the GOT table + * size located at the beginning of the module. + */ + *size -= (*start - m_start); + } + + return 0; +} + +/* On s390 kernel text segment start is located at very low memory addresses, + * for example 0x10000. Modules are located at very high memory addresses, + * for example 0x3ff xxxx xxxx. The gap between end of kernel text segment + * and beginning of first module's text segment is very big. + * Therefore do not fill this gap and do not assign it to the kernel dso map. + */ +void arch__symbols__fixup_end(struct symbol *p, struct symbol *c) +{ + if (strchr(p->name, '[') == NULL && strchr(c->name, '[')) + /* Last kernel symbol mapped to end of page */ + p->end = roundup(p->end, page_size); + else + p->end = c->start; + pr_debug4("%s sym:%s end:%#lx\n", __func__, p->name, p->end); +} -- cgit v1.2.3