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53 lines
1.7 KiB
53 lines
1.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <inttypes.h> |
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#include <unistd.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <internal/lib.h> // page_size |
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#include "machine.h" |
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#include "api/fs/fs.h" |
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#include "debug.h" |
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#include "symbol.h" |
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int arch__fix_module_text_start(u64 *start, u64 *size, const char *name) |
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{ |
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u64 m_start = *start; |
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char path[PATH_MAX]; |
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snprintf(path, PATH_MAX, "module/%.*s/sections/.text", |
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(int)strlen(name) - 2, name + 1); |
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if (sysfs__read_ull(path, (unsigned long long *)start) < 0) { |
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pr_debug2("Using module %s start:%#lx\n", path, m_start); |
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*start = m_start; |
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} else { |
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/* Successful read of the modules segment text start address. |
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* Calculate difference between module start address |
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* in memory and module text segment start address. |
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* For example module load address is 0x3ff8011b000 |
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* (from /proc/modules) and module text segment start |
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* address is 0x3ff8011b870 (from file above). |
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* |
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* Adjust the module size and subtract the GOT table |
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* size located at the beginning of the module. |
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*/ |
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*size -= (*start - m_start); |
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} |
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return 0; |
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} |
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/* On s390 kernel text segment start is located at very low memory addresses, |
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* for example 0x10000. Modules are located at very high memory addresses, |
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* for example 0x3ff xxxx xxxx. The gap between end of kernel text segment |
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* and beginning of first module's text segment is very big. |
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* Therefore do not fill this gap and do not assign it to the kernel dso map. |
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*/ |
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void arch__symbols__fixup_end(struct symbol *p, struct symbol *c) |
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{ |
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if (strchr(p->name, '[') == NULL && strchr(c->name, '[')) |
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/* Last kernel symbol mapped to end of page */ |
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p->end = roundup(p->end, page_size); |
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else |
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p->end = c->start; |
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pr_debug4("%s sym:%s end:%#" PRIx64 "\n", __func__, p->name, p->end); |
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}
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