mirror of
https://github.com/clearlinux/kvmtool.git
synced 2026-06-15 18:05:49 +00:00
Sasha Levin
49a8afd1b9
Switch to using init/exit calls instead of the repeating call blocks in builtin-run. Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
134 lines
2.2 KiB
C
134 lines
2.2 KiB
C
#include "kvm/symbol.h"
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#include "kvm/kvm.h"
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#include <linux/err.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <bfd.h>
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static bfd *abfd;
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int symbol_init(struct kvm *kvm)
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{
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int ret = 0;
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if (!kvm->vmlinux)
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return 0;
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bfd_init();
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abfd = bfd_openr(kvm->vmlinux, NULL);
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if (abfd == NULL) {
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bfd_error_type err = bfd_get_error();
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switch (err) {
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case bfd_error_no_memory:
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ret = -ENOMEM;
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break;
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case bfd_error_invalid_target:
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ret = -EINVAL;
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break;
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default:
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ret = -EFAULT;
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break;
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}
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}
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return ret;
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}
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late_init(symbol_init);
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static asymbol *lookup(asymbol **symbols, int nr_symbols, const char *symbol_name)
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{
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int i, ret;
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ret = -ENOENT;
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for (i = 0; i < nr_symbols; i++) {
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asymbol *symbol = symbols[i];
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if (!strcmp(bfd_asymbol_name(symbol), symbol_name))
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return symbol;
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}
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return ERR_PTR(ret);
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}
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char *symbol_lookup(struct kvm *kvm, unsigned long addr, char *sym, size_t size)
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{
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const char *filename;
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bfd_vma sym_offset;
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bfd_vma sym_start;
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asection *section;
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unsigned int line;
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const char *func;
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long symtab_size;
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asymbol *symbol;
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asymbol **syms;
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int nr_syms, ret;
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ret = -ENOENT;
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if (!abfd)
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goto not_found;
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if (!bfd_check_format(abfd, bfd_object))
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goto not_found;
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symtab_size = bfd_get_symtab_upper_bound(abfd);
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if (!symtab_size)
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goto not_found;
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ret = -ENOMEM;
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syms = malloc(symtab_size);
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if (!syms)
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goto not_found;
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nr_syms = bfd_canonicalize_symtab(abfd, syms);
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ret = -ENOENT;
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section = bfd_get_section_by_name(abfd, ".debug_aranges");
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if (!section)
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goto not_found;
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if (!bfd_find_nearest_line(abfd, section, NULL, addr, &filename, &func, &line))
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goto not_found;
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if (!func)
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goto not_found;
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symbol = lookup(syms, nr_syms, func);
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if (IS_ERR(symbol))
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goto not_found;
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sym_start = bfd_asymbol_value(symbol);
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sym_offset = addr - sym_start;
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snprintf(sym, size, "%s+%llx (%s:%i)", func, (long long) sym_offset, filename, line);
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sym[size - 1] = '\0';
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free(syms);
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return sym;
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not_found:
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return ERR_PTR(ret);
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}
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int symbol_exit(struct kvm *kvm)
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{
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bfd_boolean ret = TRUE;
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if (abfd)
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ret = bfd_close(abfd);
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if (ret == TRUE)
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return 0;
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return -EFAULT;
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}
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late_exit(symbol_exit);
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