diff options
Diffstat (limited to 'libsframe/sframe-dump.c')
| -rw-r--r-- | libsframe/sframe-dump.c | 91 |
1 files changed, 57 insertions, 34 deletions
diff --git a/libsframe/sframe-dump.c b/libsframe/sframe-dump.c index 42a086a..47ac00e 100644 --- a/libsframe/sframe-dump.c +++ b/libsframe/sframe-dump.c @@ -1,6 +1,6 @@ /* sframe-dump.c - Textual dump of .sframe. - Copyright (C) 2022-2024 Free Software Foundation, Inc. + Copyright (C) 2022-2025 Free Software Foundation, Inc. This file is part of libsframe. @@ -23,8 +23,6 @@ #include <inttypes.h> #include "sframe-impl.h" -#define SFRAME_HEADER_FLAGS_STR_MAX_LEN 50 - /* Return TRUE if the SFrame section is associated with the aarch64 ABIs. */ static bool @@ -41,12 +39,43 @@ is_sframe_abi_arch_aarch64 (sframe_decoder_ctx *sfd_ctx) } static void +dump_sframe_header_flags (sframe_decoder_ctx *sfd_ctx) +{ + uint8_t flags; + const char *prefix = "Flags: "; + + flags = sframe_decoder_get_flags (sfd_ctx); + if (!flags) + { + printf ("%11sNONE\n", prefix); + return; + } + +#define PRINT_FLAG(x) \ + if (flags & (x)) \ + { flags = (flags & ~(x)); \ + printf ("%11s%s%s\n", prefix, #x, flags ? "," : ""); \ + prefix = " "; \ + } + + PRINT_FLAG (SFRAME_F_FDE_SORTED); + PRINT_FLAG (SFRAME_F_FRAME_POINTER); + PRINT_FLAG (SFRAME_F_FDE_FUNC_START_PCREL); +#undef PRINT_FLAG + + /* Print any residual flags, should this implementation be out of sync when + new flags are added. */ + if (flags) + printf ("%11s%d\n", prefix, flags); +} + +static void dump_sframe_header (sframe_decoder_ctx *sfd_ctx) { uint8_t ver; - uint8_t flags; - char *flags_str; const char *ver_str = NULL; + int8_t cfa_fixed_fp_offset; + int8_t cfa_fixed_ra_offset; const sframe_header *header = &(sfd_ctx->sfd_header); /* Prepare SFrame section version string. */ @@ -55,43 +84,28 @@ dump_sframe_header (sframe_decoder_ctx *sfd_ctx) "SFRAME_VERSION_1", "SFRAME_VERSION_2" }; - /* PS: Keep SFRAME_HEADER_FLAGS_STR_MAX_LEN in sync if adding more members to - this array. */ - const char *flag_names[] - = { "SFRAME_F_FDE_SORTED", - "SFRAME_F_FRAME_POINTER" }; - ver = sframe_decoder_get_version (sfd_ctx); if (ver <= SFRAME_VERSION) ver_str = version_names[ver]; - /* Prepare SFrame section flags string. */ - flags = header->sfh_preamble.sfp_flags; - flags_str = (char*) calloc (SFRAME_HEADER_FLAGS_STR_MAX_LEN, sizeof (char)); - if (flags) - { - if (flags & SFRAME_F_FDE_SORTED) - strcpy (flags_str, flag_names[0]); - if (flags & SFRAME_F_FRAME_POINTER) - { - if (strlen (flags_str) > 0) - strcpy (flags_str, ","); - strcpy (flags_str, flag_names[1]); - } - } - else - strcpy (flags_str, "NONE"); + /* CFA fixed FP and RA offsets. */ + cfa_fixed_fp_offset = header->sfh_cfa_fixed_fp_offset; + cfa_fixed_ra_offset = header->sfh_cfa_fixed_ra_offset; const char* subsec_name = "Header"; printf ("\n"); printf (" %s :\n", subsec_name); printf ("\n"); printf (" Version: %s\n", ver_str); - printf (" Flags: %s\n", flags_str); + + dump_sframe_header_flags (sfd_ctx); + + if (cfa_fixed_fp_offset != SFRAME_CFA_FIXED_FP_INVALID) + printf (" CFA fixed FP offset: %d\n", cfa_fixed_fp_offset); + if (cfa_fixed_ra_offset != SFRAME_CFA_FIXED_RA_INVALID) + printf (" CFA fixed RA offset: %d\n", cfa_fixed_ra_offset); printf (" Num FDEs: %d\n", sframe_decoder_get_num_fidx (sfd_ctx)); printf (" Num FREs: %d\n", header->sfh_num_fres); - - free (flags_str); } static void @@ -119,8 +133,15 @@ dump_sframe_func_with_fres (sframe_decoder_ctx *sfd_ctx, /* Get the SFrame function descriptor. */ sframe_decoder_get_funcdesc (sfd_ctx, funcidx, &num_fres, &func_size, &func_start_address, &func_info); - /* Calculate the virtual memory address for function start pc. */ +/* Calculate the virtual memory address for function start pc. Some older + SFrame V2 sections in ET_DYN or ET_EXEC may still have the + SFRAME_F_FDE_FUNC_START_PCREL flag unset, and hence may be using the + old encoding. Continue to support dumping the sections at least. */ func_start_pc_vma = func_start_address + sec_addr; + if (sframe_decoder_get_flags (sfd_ctx) & SFRAME_F_FDE_FUNC_START_PCREL) + func_start_pc_vma += sframe_decoder_get_offsetof_fde_start_addr (sfd_ctx, + funcidx, + NULL); /* Mark FDEs with [m] where the FRE start address is interpreted as a mask. */ @@ -171,13 +192,15 @@ dump_sframe_func_with_fres (sframe_decoder_ctx *sfd_ctx, printf ("%-10s", temp); /* Dump RA info. - If an ABI does not track RA offset, e.g., AMD64, display a 'u', + If an ABI does not track RA offset, e.g., AMD64, display 'f', else display the offset d as 'c+-d'. */ - if (sframe_decoder_get_fixed_ra_offset(sfd_ctx) + if (sframe_decoder_get_fixed_ra_offset (sfd_ctx) != SFRAME_CFA_FIXED_RA_INVALID) - strcpy (temp, "u"); + strcpy (temp, "f"); else if (err[2] == 0) sprintf (temp, "c%+d", ra_offset); + else + strcpy (temp, "u"); /* Mark SFrame FRE's RA information with "[s]" if the RA is mangled with signature bits. */ |