/*
 * mem.h
 *
 * Copyright (c) 2019, shchmue.
 * Copyright (c) 2020-2024, DarkMatterCore <pabloacurielz@gmail.com>.
 *
 * This file is part of nxdumptool (https://github.com/DarkMatterCore/nxdumptool).
 *
 * nxdumptool is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * nxdumptool is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

#pragma once

#ifndef __MEM_H__
#define __MEM_H__

#ifdef __cplusplus
extern "C" {
#endif

typedef enum {
    MemoryProgramSegmentType_None   = 0,
    MemoryProgramSegmentType_Text   = BIT(0),
    MemoryProgramSegmentType_Rodata = BIT(1),
    MemoryProgramSegmentType_Data   = BIT(2),
    MemoryProgramSegmentType_All    = (MemoryProgramSegmentType_Data | MemoryProgramSegmentType_Rodata | MemoryProgramSegmentType_Text),
    MemoryProgramSegmentType_Limit  = (MemoryProgramSegmentType_All + 1)                                                                    ///< Placed here for convenience.
} MemoryProgramSegmentType;

typedef struct {
    u64 program_id;
    u8 mask;        ///< MemoryProgramSegmentType. Used with memRetrieveProgramMemorySegment(). Ignored in memRetrieveFullProgramMemory().
    u8 *data;
    u64 data_size;
} MemoryLocation;

/// Retrieves memory segment (.text, .rodata, .data) data from a running program.
/// These are memory pages with read permission (Perm_R) enabled, with type MemType_CodeStatic or MemType_CodeMutable and no MemoryAttribute flag set.
bool memRetrieveProgramMemorySegment(MemoryLocation *location);

/// Retrieves full memory data from a running program.
/// These are any type of memory pages with read permission (Perm_R) enabled and no MemoryAttribute flag set.
/// MemType_Unmapped, MemType_Io, MemType_ThreadLocal and MemType_Reserved memory pages are excluded if FS program memory is being retrieved, in order to avoid hangs.
bool memRetrieveFullProgramMemory(MemoryLocation *location);

/// Frees a populated MemoryLocation element.
NX_INLINE void memFreeMemoryLocation(MemoryLocation *location)
{
    if (!location) return;
    if (location->data) free(location->data);
    location->data = NULL;
    location->data_size = 0;
}

#ifdef __cplusplus
}
#endif

#endif /* __MEM_H__ */