tools/bpf/bpftool/xlated_dumper.c
Source file repositories/reference/linux-study-clean/tools/bpf/bpftool/xlated_dumper.c
File Facts
- System
- Linux kernel
- Corpus path
tools/bpf/bpftool/xlated_dumper.c- Extension
.c- Size
- 10699 bytes
- Lines
- 435
- Domain
- Support Tooling And Documentation
- Bucket
- tools
- Inferred role
- Support Tooling And Documentation: implementation source
- Status
- source implementation candidate
Why This File Exists
Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
stdarg.hstdio.hstdlib.hstring.hsys/types.hbpf/libbpf.hbpf/libbpf_internal.hdisasm.hjson_writer.hmain.hxlated_dumper.h
Detected Declarations
function kernel_syms_cmpfunction kernel_syms_loadfunction kernel_syms_destroyfunction __printffunction __printffunction __printffunction dump_xlated_jsonfunction dump_xlated_plainfunction dump_xlated_for_graph
Annotated Snippet
if (!tmp) {
out:
free(dd->sym_mapping);
dd->sym_mapping = NULL;
fclose(fp);
return;
}
dd->sym_mapping = tmp;
sym = &dd->sym_mapping[dd->sym_count];
/* module is optional */
sym->module[0] = '\0';
/* trim the square brackets around the module name */
if (sscanf(buff, "%p %*c %s [%[^]]s", &address, sym->name, sym->module) < 2)
continue;
sym->address = (unsigned long)address;
if (!strcmp(sym->name, "__bpf_call_base")) {
dd->address_call_base = sym->address;
/* sysctl kernel.kptr_restrict was set */
if (!sym->address)
goto out;
}
if (sym->address)
dd->sym_count++;
}
fclose(fp);
qsort(dd->sym_mapping, dd->sym_count,
sizeof(*dd->sym_mapping), kernel_syms_cmp);
}
void kernel_syms_destroy(struct dump_data *dd)
{
free(dd->sym_mapping);
}
struct kernel_sym *kernel_syms_search(struct dump_data *dd,
unsigned long key)
{
struct kernel_sym sym = {
.address = key,
};
return dd->sym_mapping ?
bsearch(&sym, dd->sym_mapping, dd->sym_count,
sizeof(*dd->sym_mapping), kernel_syms_cmp) : NULL;
}
static void __printf(2, 3) print_insn(void *private_data, const char *fmt, ...)
{
va_list args;
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
static void __printf(2, 3)
print_insn_for_graph(void *private_data, const char *fmt, ...)
{
char buf[64], *p;
va_list args;
va_start(args, fmt);
vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
p = buf;
while (*p != '\0') {
if (*p == '\n') {
memmove(p + 3, p, strlen(buf) + 1 - (p - buf));
/* Align each instruction dump row left. */
*p++ = '\\';
*p++ = 'l';
/* Output multiline concatenation. */
*p++ = '\\';
} else if (*p == '<' || *p == '>' || *p == '|' || *p == '&') {
memmove(p + 1, p, strlen(buf) + 1 - (p - buf));
/* Escape special character. */
*p++ = '\\';
}
p++;
}
printf("%s", buf);
}
static void __printf(2, 3)
Annotation
- Immediate include surface: `stdarg.h`, `stdio.h`, `stdlib.h`, `string.h`, `sys/types.h`, `bpf/libbpf.h`, `bpf/libbpf_internal.h`, `disasm.h`.
- Detected declarations: `function kernel_syms_cmp`, `function kernel_syms_load`, `function kernel_syms_destroy`, `function __printf`, `function __printf`, `function __printf`, `function dump_xlated_json`, `function dump_xlated_plain`, `function dump_xlated_for_graph`.
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.