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3ae28d0776
Instead of the current sframe_func_desc_entry (on-disk format
representation) data structure.
The decoder context in libsframe, so far, has been internally directly
tied to the sframe_func_desc_entry (on-disk format representation) data
structure. While this allows libsframe to avoid some operations, this
is not desirable anymore as the format evolves: we will need to support
reading in of older version(s) of SFrame FDE, as well as a newer on-disk
representations for SFrame FDE.
Use sf_fde_tbl internally in the decoder context. Note that libsframe
already does _not_ use sframe_func_desc_entry in any external-facing,
user-visible APIs.
Note that this commit is simply preparatory in nature. At the moment,
the 'sf_fde_tbl' internally uses the sframe_func_desc_entry (on-disk
format representation). When need arises (as SFrame FDE evolves), we
may change sf_fde_tbl to use an alternative (but still libsframe
internal) definition of SFrame FDE.
lisbframe/
* sframe-impl.h (sf_fde_tbl, sf_fre_tbl): Move definition before use.
Use sf_fde_tbl instead of sframe_func_desc_entry in struct
sframe_decoder_ctx.
* sframe.c (sframe_fde_tbl_alloc): New internal definition.
(sframe_fde_tbl_init): Likewise.
(sframe_decoder_get_funcdesc_at_index): Adjust for sf_fde_tbl
usage.
(sframe_decoder_get_secrel_func_start_addr): Likewise.
(sframe_fre_check_range_p): Likewise.
(sframe_decode): Likewise.
(sframe_get_funcdesc_with_addr_internal): Likewise.
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/* Implementation header.
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Copyright (C) 2022-2025 Free Software Foundation, Inc.
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This file is part of libsframe.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef _SFRAME_IMPL_H
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#define _SFRAME_IMPL_H
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#include "sframe-api.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include <assert.h>
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#define sframe_assert(expr) (assert (expr))
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typedef struct sf_fde_tbl sf_fde_tbl;
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typedef struct sf_fre_tbl sf_fre_tbl;
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struct sframe_decoder_ctx
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{
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/* SFrame header. */
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sframe_header sfd_header;
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/* SFrame function desc entries table. */
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sf_fde_tbl *sfd_funcdesc;
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/* SFrame FRE table. */
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char *sfd_fres;
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/* Number of bytes needed for SFrame FREs. */
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int sfd_fre_nbytes;
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/* Reference to the internally malloc'd buffer, if any, for endian flipping
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the original input buffer before decoding. */
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void *sfd_buf;
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};
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struct sframe_encoder_ctx
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{
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/* SFrame header. */
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sframe_header sfe_header;
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/* SFrame function desc entries table. */
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sf_fde_tbl *sfe_funcdesc;
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/* SFrame FRE table. */
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sf_fre_tbl *sfe_fres;
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/* Number of bytes needed for SFrame FREs. */
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uint32_t sfe_fre_nbytes;
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/* SFrame output data buffer. */
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char *sfe_data;
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/* Size of the SFrame output data buffer. */
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size_t sfe_data_size;
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};
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SFRAME_IMPL_H */
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