bt.c

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// SPDX-FileCopyrightText: 2009-2018 pancake <pancake@nopcode.org>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include <rz_analysis.h>
 
#if __WINDOWS__
#include "bt/windows-all.c"
#endif
#include "bt/generic-x86.c"
#include "bt/generic-x64.c"
#include "bt/fuzzy-all.c"
 
typedef RzList *(*RzDebugFrameCallback)(RzDebug *dbg, ut64 at);
 
static void prepend_current_pc(RzDebug *dbg, RzList *list) {
    RzDebugFrame *frame;
    const char *pcname;
    if (list) {
        pcname = rz_reg_get_name(dbg->reg, RZ_REG_NAME_PC);
        if (pcname) {
            ut64 addr = rz_reg_getv(dbg->reg, pcname);
            frame = RZ_NEW0(RzDebugFrame);
            frame->addr = addr;
            frame->size = 0;
            rz_list_prepend(list, frame);
        }
    }
}
 
#if HAVE_PTRACE
struct frames_proxy_args {
    RzDebugFrameCallback cb;
    RzDebug *dbg;
    ut64 at;
};
 
static void *backtrace_proxy(void *user) {
    struct frames_proxy_args *args = user;
    if (args->cb) {
        return args->cb(args->dbg, args->at);
    }
    return NULL;
}
#endif
 
static RzList *rz_debug_native_frames(RzDebug *dbg, ut64 at) {
    RzDebugFrameCallback cb = NULL;
    if (dbg->btalgo) {
        if (!strcmp(dbg->btalgo, "fuzzy")) {
            cb = backtrace_fuzzy;
        } else if (!strcmp(dbg->btalgo, "analysis")) {
            if (!strcmp(dbg->arch, "x86")) {
                if (dbg->bits == RZ_SYS_BITS_64) {
                    cb = backtrace_x86_64_analysis;
                } else {
                    cb = backtrace_x86_32_analysis;
                }
            } else {
                eprintf("Analysis backtrace not available for current architecture (%s)\n", dbg->arch);
                return NULL;
            }
        }
    }
    if (!cb) {
#if __WINDOWS__
        cb = backtrace_windows;
#else
        if (dbg->bits == RZ_SYS_BITS_64) {
            cb = backtrace_x86_64;
        } else {
            cb = backtrace_x86_32;
        }
#endif
    }
 
    RzList *list;
    if (dbg->btalgo && !strcmp(dbg->btalgo, "trace")) {
        list = rz_list_clone(dbg->call_frames);
    } else {
#if HAVE_PTRACE
        struct frames_proxy_args args = { cb, dbg, at };
        list = rz_debug_ptrace_func(dbg, backtrace_proxy, &args);
#else
        list = cb(dbg, at);
#endif
    }
 
    prepend_current_pc(dbg, list);
    return list;
}