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tools/bpftool: Fix compilation warnings in 32-bit mode 

Fix few compilation warnings in bpftool when compiling in 32-bit mode.
Abstract away u64 to pointer conversion into a helper function.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-2-andriin@fb.com
This commit is contained in:
Andrii Nakryiko 2020-08-13 13:49:37 -07:00 committed by Alexei Starovoitov
parent a62f68c172
commit 09f44b753a
4 changed files with 20 additions and 12 deletions
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2
tools/bpf/bpftool/btf_dumper.c
View File

@ -67,7 +67,7 @@ static int dump_prog_id_as_func_ptr(const struct btf_dumper *d,
if (!info->btf_id || !info->nr_func_info ||
btf__get_from_id(info->btf_id, &prog_btf))
goto print;
finfo = (struct bpf_func_info *)info->func_info;
finfo = u64_to_ptr(info->func_info);
func_type = btf__type_by_id(prog_btf, finfo->type_id);
if (!func_type || !btf_is_func(func_type))
goto print;

4
tools/bpf/bpftool/link.c
View File

@ -106,7 +106,7 @@ static int show_link_close_json(int fd, struct bpf_link_info *info)
switch (info->type) {
case BPF_LINK_TYPE_RAW_TRACEPOINT:
jsonw_string_field(json_wtr, "tp_name",
(const char *)info->raw_tracepoint.tp_name);
u64_to_ptr(info->raw_tracepoint.tp_name));
break;
case BPF_LINK_TYPE_TRACING:
err = get_prog_info(info->prog_id, &prog_info);
@ -185,7 +185,7 @@ static int show_link_close_plain(int fd, struct bpf_link_info *info)
switch (info->type) {
case BPF_LINK_TYPE_RAW_TRACEPOINT:
printf("\n\ttp '%s' ",
(const char *)info->raw_tracepoint.tp_name);
(const char *)u64_to_ptr(info->raw_tracepoint.tp_name));
break;
case BPF_LINK_TYPE_TRACING:
err = get_prog_info(info->prog_id, &prog_info);

10
tools/bpf/bpftool/main.h
View File

@ -21,7 +21,15 @@
/* Make sure we do not use kernel-only integer typedefs */
#pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
#define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
static inline __u64 ptr_to_u64(const void *ptr)
{
return (__u64)(unsigned long)ptr;
}
static inline void *u64_to_ptr(__u64 ptr)
{
return (void *)(unsigned long)ptr;
}
#define NEXT_ARG() ({ argc--; argv++; if (argc < 0) usage(); })
#define NEXT_ARGP() ({ (*argc)--; (*argv)++; if (*argc < 0) usage(); })

16
tools/bpf/bpftool/prog.c
View File

@ -428,14 +428,14 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
p_info("no instructions returned");
return -1;
}
buf = (unsigned char *)(info->jited_prog_insns);
buf = u64_to_ptr(info->jited_prog_insns);
member_len = info->jited_prog_len;
} else { /* DUMP_XLATED */
if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
p_err("error retrieving insn dump: kernel.kptr_restrict set?");
return -1;
}
buf = (unsigned char *)info->xlated_prog_insns;
buf = u64_to_ptr(info->xlated_prog_insns);
member_len = info->xlated_prog_len;
}
@ -444,7 +444,7 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
return -1;
}
func_info = (void *)info->func_info;
func_info = u64_to_ptr(info->func_info);
if (info->nr_line_info) {
prog_linfo = bpf_prog_linfo__new(info);
@ -462,7 +462,7 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
n = write(fd, buf, member_len);
close(fd);
if (n != member_len) {
if (n != (ssize_t)member_len) {
p_err("error writing output file: %s",
n < 0 ? strerror(errno) : "short write");
return -1;
@ -492,13 +492,13 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
__u32 i;
if (info->nr_jited_ksyms) {
kernel_syms_load(&dd);
ksyms = (__u64 *) info->jited_ksyms;
ksyms = u64_to_ptr(info->jited_ksyms);
}
if (json_output)
jsonw_start_array(json_wtr);
lens = (__u32 *) info->jited_func_lens;
lens = u64_to_ptr(info->jited_func_lens);
for (i = 0; i < info->nr_jited_func_lens; i++) {
if (ksyms) {
sym = kernel_syms_search(&dd, ksyms[i]);
@ -559,7 +559,7 @@ prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
} else {
kernel_syms_load(&dd);
dd.nr_jited_ksyms = info->nr_jited_ksyms;
dd.jited_ksyms = (__u64 *) info->jited_ksyms;
dd.jited_ksyms = u64_to_ptr(info->jited_ksyms);
dd.btf = btf;
dd.func_info = func_info;
dd.finfo_rec_size = info->func_info_rec_size;
@ -1681,7 +1681,7 @@ static char *profile_target_name(int tgt_fd)
goto out;
}
func_info = (struct bpf_func_info *)(info_linear->info.func_info);
func_info = u64_to_ptr(info_linear->info.func_info);
t = btf__type_by_id(btf, func_info[0].type_id);
if (!t) {
p_err("btf %d doesn't have type %d",