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sys/cddl/dev/kinst/amd64/kinst_isa.c
| Show First 20 Lines • Show All 506 Lines • ▼ Show 20 Lines | kinst_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; | ||||
| ▲ Show 20 Lines • Show All 82 Lines • Show Last 20 Lines | |||||