diff options
Diffstat (limited to 'tools/perf/arch/s390/util/machine.c')
| -rw-r--r-- | tools/perf/arch/s390/util/machine.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/tools/perf/arch/s390/util/machine.c b/tools/perf/arch/s390/util/machine.c index 0b2054007314..98bc3f39d5f3 100644 --- a/tools/perf/arch/s390/util/machine.c +++ b/tools/perf/arch/s390/util/machine.c @@ -1,20 +1,37 @@ // SPDX-License-Identifier: GPL-2.0 +#include <inttypes.h> #include <unistd.h> #include <stdio.h> #include <string.h> -#include "util.h" +#include <internal/lib.h> // page_size #include "machine.h" #include "api/fs/fs.h" +#include "debug.h" +#include "symbol.h" -int arch__fix_module_text_start(u64 *start, const char *name) +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) - return -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; } |