libunwind-context-pc.c

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#define UNW_LOCAL_ONLY

#include <sys/types.h>
#include <libunwind.h>

// Returns: the PC/IP from a libunwind context struct.
//
void *
hpcrun_context_pc(void *context)
{
  unw_context_t *ctx = (unw_context_t *) context;
  unw_cursor_t cursor;
  unw_word_t pc = 0;

  if (ctx == NULL
      || unw_init_local(&cursor, ctx) != 0
      || unw_get_reg(&cursor, UNW_REG_IP, &pc) != 0) {
    pc = 0;
  }

  return (void *) pc;
}