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Differential D39229 Diff 121498 sys/cddl/dev/kinst/amd64/kinst_isa.c

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sys/cddl/dev/kinst/amd64/kinst_isa.c

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#include <machine/md_var.h> #include <machine/md_var.h>
#include <sys/dtrace.h> #include <sys/dtrace.h>
#include <cddl/dev/dtrace/dtrace_cddl.h> #include <cddl/dev/dtrace/dtrace_cddl.h>
#include <dis_tables.h> #include <dis_tables.h>
#include "kinst.h" #include "kinst.h"
#define KINST_PUSHL_RBP 0x55
#define KINST_STI 0xfb #define KINST_STI 0xfb
#define KINST_POPF 0x9d #define KINST_POPF 0x9d
#define KINST_MODRM_MOD(b) (((b) & 0xc0) >> 6) #define KINST_MODRM_MOD(b) (((b) & 0xc0) >> 6)
#define KINST_MODRM_REG(b) (((b) & 0x38) >> 3) #define KINST_MODRM_REG(b) (((b) & 0x38) >> 3)
#define KINST_MODRM_RM(b) ((b) & 0x07) #define KINST_MODRM_RM(b) ((b) & 0x07)
#define KINST_SIB_SCALE(s) (((s) & 0xc0) >> 6) #define KINST_SIB_SCALE(s) (((s) & 0xc0) >> 6)
▲ Show 20 Lines • Show All 478 Lines • ▼ Show 20 Lineskinst_make_probe(linker_file_t lf, int symindx, linker_symval_t *symval,
struct kinst_probe *kp; struct kinst_probe *kp;
dtrace_kinst_probedesc_t *pd; dtrace_kinst_probedesc_t *pd;
const char *func; const char *func;
int error, instrsize, n, off; int error, instrsize, n, off;
uint8_t *instr, *limit; uint8_t *instr, *limit;
pd = opaque; pd = opaque;
func = symval->name; func = symval->name;
if (strcmp(func, pd->kpd_func) != 0 || strcmp(func, "trap_check") == 0)
if (kinst_excluded(func))
return (0); return (0);
if (strcmp(func, pd->kpd_func) != 0)
return (0);
instr = (uint8_t *)symval->value; instr = (uint8_t *)symval->value;
limit = (uint8_t *)symval->value + symval->size; limit = (uint8_t *)symval->value + symval->size;
if (instr >= limit) if (instr >= limit)
return (0);
/*
* Ignore functions not beginning with the usual function prologue.
* These might correspond to exception handlers with which we should not
* meddle. This does however exclude functions which can be safely
* traced, such as cpu_switch().
*/
if (*instr != KINST_PUSHL_RBP)
return (0); return (0);
n = 0; n = 0;
while (instr < limit) { while (instr < limit) {
instrsize = dtrace_instr_size(instr); instrsize = dtrace_instr_size(instr);
off = (int)(instr - (uint8_t *)symval->value); off = (int)(instr - (uint8_t *)symval->value);
if (pd->kpd_off != -1 && off != pd->kpd_off) { if (pd->kpd_off != -1 && off != pd->kpd_off) {
instr += instrsize; instr += instrsize;
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