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Make 64-bit procstat output ELF auxiliary vectors for 32-bit processes.

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Reviewed by:	kib
MFC after:	1 week
This commit is contained in:
Mikolaj Golub 2011-12-12 22:01:33 +00:00
parent de21500d6a
commit cc1ff620b9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=228447
1 changed files with 89 additions and 18 deletions
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107
usr.bin/procstat/procstat_auxv.c
View file

@ -43,39 +43,110 @@
#include "procstat.h"
static Elf_Auxinfo auxv[256];
#define PROC_AUXV_MAX 256
static Elf_Auxinfo auxv[PROC_AUXV_MAX];
static char prefix[256];
#if __ELF_WORD_SIZE == 64
static Elf32_Auxinfo auxv32[PROC_AUXV_MAX];
static const char *elf32_sv_names[] = {
"Linux ELF32",
"FreeBSD ELF32",
};
static int
is_elf32(pid_t pid)
{
int error, name[4];
size_t len, i;
static char sv_name[256];
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_SV_NAME;
name[3] = pid;
len = sizeof(sv_name);
error = sysctl(name, 4, sv_name, &len, NULL, 0);
if (error != 0 || len == 0)
return (0);
for (i = 0; i < sizeof(elf32_sv_names) / sizeof(*elf32_sv_names); i++) {
if (strncmp(sv_name, elf32_sv_names[i], sizeof(sv_name)) == 0)
return (1);
}
return (0);
}
static size_t
retrieve_auxv32(pid_t pid)
{
int error, name[4];
size_t len, i;
void *ptr;
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_AUXV;
name[3] = pid;
len = sizeof(auxv32);
error = sysctl(name, 4, auxv32, &len, NULL, 0);
if (error < 0 && errno != ESRCH && errno != EPERM) {
warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
return (0);
}
for (i = 0; i < len; i++) {
/*
* XXX: We expect that values for a_type on a 32-bit platform
* are directly mapped to those on 64-bit one, which is not
* necessarily true.
*/
auxv[i].a_type = auxv32[i].a_type;
ptr = &auxv32[i].a_un;
auxv[i].a_un.a_val = *((uint32_t *)ptr);
}
return (len);
}
#endif /* __ELF_WORD_SIZE == 64 */
#define PRINT(name, spec, val) \
printf("%s %-16s " #spec "\n", prefix, #name, (val))
#define PRINT_UNKNOWN(type, val) \
printf("%s %16ld %#lx\n", prefix, (long)type, (u_long)(val))
static size_t
retrieve_auxv(pid_t pid)
{
int error, name[4];
size_t len;
#if __ELF_WORD_SIZE == 64
if (is_elf32(pid))
return (retrieve_auxv32(pid));
#endif
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_AUXV;
name[3] = pid;
len = sizeof(auxv);
error = sysctl(name, 4, auxv, &len, NULL, 0);
if (error < 0 && errno != ESRCH && errno != EPERM) {
warn("sysctl: kern.proc.auxv: %d: %d", pid, errno);
return (0);
}
return (len);
}
void
procstat_auxv(struct kinfo_proc *kipp)
{
int error, name[4];
size_t len, i;
if (!hflag)
printf("%5s %-16s %-16s %-16s\n", "PID", "COMM", "AUXV", "VALUE");
name[0] = CTL_KERN;
name[1] = KERN_PROC;
name[2] = KERN_PROC_AUXV;
name[3] = kipp->ki_pid;
len = sizeof(auxv) * sizeof(*auxv);
error = sysctl(name, 4, auxv, &len, NULL, 0);
if (error < 0 && errno != ESRCH && errno != EPERM) {
warn("sysctl: kern.proc.auxv: %d: %d", kipp->ki_pid, errno);
len = retrieve_auxv(kipp->ki_pid);
if (len == 0)
return;
}
if (error < 0 || len == 0)
return;
if (len == 0) {
printf(" -\n");
return;
}
snprintf(prefix, sizeof(prefix), "%5d %-16s", kipp->ki_pid,
kipp->ki_comm);
for (i = 0; i < len; i++) {