kit

kit
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dwarfsym.c (1638B)

      1 #include "dwarfsym.h"
      2 
      3 #include <string.h>
      4 
      5 #include "driver.h"
      6 
      7 int driver_dwarfsym_open(DriverDwarfSym* s, DriverEnv* env, const char* tool,
      8                          const char* path) {
      9   KitSlice input;
     10 
     11   memset(s, 0, sizeof *s);
     12   s->env = env;
     13   s->ctx = driver_env_to_context(env);
     14 
     15   if (driver_load_bytes(&env->file_io, tool, path, &s->ld, &input) != 0)
     16     return 1;
     17 
     18   {
     19     KitSlice name_slice = kit_slice_cstr(path);
     20     if (kit_obj_open(&s->ctx, name_slice, &input, &s->of) != KIT_OK) {
     21       driver_errf(tool, "%s: not a recognized object file", path);
     22       return 1;
     23     }
     24   }
     25 
     26   if (kit_dwarf_open(&s->ctx, s->of, &s->dwarf) != KIT_OK) {
     27     driver_errf(tool, "%s: no debug info available", path);
     28     return 1;
     29   }
     30 
     31   return 0;
     32 }
     33 
     34 void driver_dwarfsym_close(DriverDwarfSym* s) {
     35   if (!s) return;
     36   if (s->dwarf) {
     37     kit_dwarf_free(s->dwarf);
     38     s->dwarf = NULL;
     39   }
     40   if (s->of) {
     41     kit_obj_free(s->of);
     42     s->of = NULL;
     43   }
     44   if (s->env && s->ld.loaded) driver_release_bytes(&s->env->file_io, &s->ld);
     45 }
     46 
     47 void driver_dwarfsym_lookup(DriverDwarfSym* s, uint64_t addr, int want_func,
     48                             DriverSymLoc* out) {
     49   KitSlice file;
     50   uint32_t line = 0, col = 0;
     51 
     52   memset(out, 0, sizeof *out);
     53 
     54   if (kit_dwarf_addr_to_line(s->dwarf, addr, &file, &line, &col) == KIT_OK) {
     55     out->have_line = 1;
     56     out->file = file;
     57     out->line = line;
     58     out->col = col;
     59   }
     60 
     61   if (want_func) {
     62     KitSlice func;
     63     uint64_t func_lo = 0, func_hi = 0;
     64     if (kit_dwarf_func_at(s->dwarf, addr, &func, &func_lo, &func_hi) ==
     65         KIT_OK) {
     66       out->have_func = 1;
     67       out->func = func;
     68     }
     69   }
     70 }