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include: libsframe: add APIs for SFrame header flags

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Add new APIs, one each for getting flags from the SFrame decoder and
SFrame encoder context objects respectively.

These will later be used by the linker to uniformly access the flags,
given the SFrame decoder and SFrame encoder objects.

Use the new API, where applicable, within libsframe.

include/
        * sframe-api.h (sframe_decoder_get_flags): New declaration.
        (sframe_encoder_get_flags): Likewise.
libsframe/
	* libsframe.ver: List new APIs.
        * sframe.c (sframe_decoder_get_flags): New definition.
	(sframe_encoder_get_flags): Likewise.
        (sframe_get_funcdesc_with_addr_internal): Use the new API.
        (sframe_encoder_get_flags): Likewise.
        (sframe_encoder_write_sframe): Likewise.
This commit is contained in:
Indu Bhagat
2025-07-06 12:46:09 -07:00
parent 7030f7a030
commit 251c6789b3
3 changed files with 33 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/sframe-api.h
View File

@@ -124,6 +124,10 @@ sframe_decoder_get_abi_arch (sframe_decoder_ctx *dctx);
extern uint8_t
sframe_decoder_get_version (sframe_decoder_ctx *dctx);
/* Get the section flags from the SFrame decoder context DCTX. */
extern uint8_t
sframe_decoder_get_flags (sframe_decoder_ctx *dctx);
/* Return the number of function descriptor entries in the SFrame decoder
DCTX. */
extern uint32_t
@@ -238,6 +242,10 @@ sframe_encoder_get_abi_arch (sframe_encoder_ctx *encoder);
extern uint8_t
sframe_encoder_get_version (sframe_encoder_ctx *encoder);
/* Get the section flags from the SFrame encoder context ENCODER. */
extern uint8_t
sframe_encoder_get_flags (sframe_encoder_ctx *encoder);
/* Return the number of function descriptor entries in the SFrame encoder
ENCODER. */
extern uint32_t

5
libsframe/libsframe.ver
View File

@@ -38,3 +38,8 @@ LIBSFRAME_1.0 {
local:
*;
} LIBSFRAME_0.0;
LIBSFRAME_1.1 {
sframe_decoder_get_flags;
sframe_encoder_get_flags;
} LIBSFRAME_1.0;

24
libsframe/sframe.c
View File

@@ -988,6 +988,15 @@ sframe_decoder_get_version (sframe_decoder_ctx *dctx)
return dhp->sfh_preamble.sfp_version;
}
/* Get the section flags from the SFrame decoder context DCTX. */
uint8_t
sframe_decoder_get_flags (sframe_decoder_ctx *dctx)
{
const sframe_header *dhp = sframe_decoder_get_header (dctx);
return dhp->sfh_preamble.sfp_flags;
}
/* Get the SFrame's fixed FP offset given the decoder context CTX. */
int8_t
sframe_decoder_get_fixed_fp_offset (sframe_decoder_ctx *ctx)
@@ -1038,7 +1047,7 @@ sframe_get_funcdesc_with_addr_internal (sframe_decoder_ctx *ctx, int32_t addr,
return sframe_ret_set_errno (errp, SFRAME_ERR_DCTX_INVAL);
/* If the FDE sub-section is not sorted on PCs, skip the lookup because
binary search cannot be used. */
if ((dhp->sfh_preamble.sfp_flags & SFRAME_F_FDE_SORTED) == 0)
if ((sframe_decoder_get_flags (ctx) & SFRAME_F_FDE_SORTED) == 0)
return sframe_ret_set_errno (errp, SFRAME_ERR_FDE_NOTSORTED);
/* Do the binary search. */
@@ -1402,6 +1411,15 @@ sframe_encoder_get_version (sframe_encoder_ctx *encoder)
return ehp->sfh_preamble.sfp_version;
}
/* Get the section flags from the SFrame encoder context ENCODER. */
uint8_t
sframe_encoder_get_flags (sframe_encoder_ctx *encoder)
{
const sframe_header *ehp = sframe_encoder_get_header (encoder);
return ehp->sfh_preamble.sfp_flags;
}
/* Return the number of function descriptor entries in the SFrame encoder
ENCODER. */
@@ -1736,7 +1754,6 @@ sframe_encoder_write_sframe (sframe_encoder_ctx *encoder)
size_t fre_size;
size_t esz = 0;
sframe_header *ehp;
unsigned char flags;
sf_fde_tbl *fd_info;
sf_fre_tbl *fr_info;
uint32_t i, num_fdes;
@@ -1806,8 +1823,7 @@ sframe_encoder_write_sframe (sframe_encoder_ctx *encoder)
/* Sanity checks:
- the FDE section must have been sorted by now on the start address
of each function. */
flags = ehp->sfh_preamble.sfp_flags;
if (!(flags & SFRAME_F_FDE_SORTED)
if (!(sframe_encoder_get_flags (encoder) & SFRAME_F_FDE_SORTED)
|| (fd_info == NULL))
return sframe_set_errno (&err, SFRAME_ERR_FDE_INVAL);