* dw2gencfi.c (struct fde_entry): Add per_encoding, lsda_encoding,
personality and lsda. (struct cie_entry): Add per_encoding, lsda_encoding and personality. (alloc_fde_entry): Initialize per_encoding and lsda_encoding. (cfi_pseudo_table): Handle .cfi_personality and .cfi_lsda. (dot_cfi_personality, dot_cfi_lsda, encoding_size): New functions. (output_cie): Output personality including its encoding and LSDA encoding. (output_fde): Output LSDA. (select_cie_for_fde): Don't share CIE if personality, its encoding or LSDA encoding are different. Copy the 3 fields from fde_entry to cie_entry. * doc/as.texinfo (.cfi_personality, .cfi_lsda): Document. * gas/cfi/cfi-common-6.d: New test. * gas/cfi/cfi-common-6.s: New. * gas/cfi/cfi.exp: Add cfi-common-6 test.
This commit is contained in:
Jakub Jelinek
parent
ae424f8246
commit
9b8ae42e78
7 changed files with 412 additions and 10 deletions
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@ -1,5 +1,18 @@
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2006-11-03 Jakub Jelinek <jakub@redhat.com>
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* dw2gencfi.c (struct fde_entry): Add per_encoding, lsda_encoding,
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personality and lsda.
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(struct cie_entry): Add per_encoding, lsda_encoding and personality.
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(alloc_fde_entry): Initialize per_encoding and lsda_encoding.
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(cfi_pseudo_table): Handle .cfi_personality and .cfi_lsda.
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(dot_cfi_personality, dot_cfi_lsda, encoding_size): New functions.
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(output_cie): Output personality including its encoding and LSDA encoding.
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(output_fde): Output LSDA.
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(select_cie_for_fde): Don't share CIE if personality, its encoding or
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LSDA encoding are different. Copy the 3 fields from fde_entry to
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cie_entry.
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* doc/as.texinfo (.cfi_personality, .cfi_lsda): Document.
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* subsegs.h (struct frchain): Add frch_cfi_data field.
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* dw2gencfi.c: Include subsegs.h.
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(cur_fde_data, last_address, cur_cfa_offset, cfa_save_stack): Removed.
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@ -4102,6 +4102,25 @@ Don't forget to close the function by
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unwind entry previously opened by
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@code{.cfi_startproc}, and emits it to @code{.eh_frame}.
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@section @code{.cfi_personality @var{encoding} [, @var{exp}]}
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@code{.cfi_personality} defines personality routine and its encoding.
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@var{encoding} must be a constant determining how the personality
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should be encoded. If it is 255 (@code{DW_EH_PE_omit}), second
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argument is not present, otherwise second argument should be
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a constant or a symbol name. When using indirect encodings,
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the symbol provided should be the location where personality
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can be loaded from, not the personality routine itself.
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The default after @code{.cfi_startproc} is @code{.cfi_personality 0xff},
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no personality routine.
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@section @code{.cfi_lsda @var{encoding} [, @var{exp}]}
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@code{.cfi_lsda} defines LSDA and its encoding.
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@var{encoding} must be a constant determining how the LSDA
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should be encoded. If it is 255 (@code{DW_EH_PE_omit}), second
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argument is not present, otherwise second argument should be a constant
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or a symbol name. The default after @code{.cfi_startproc} is @code{.cfi_lsda 0xff},
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no LSDA.
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@section @code{.cfi_def_cfa @var{register}, @var{offset}}
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@code{.cfi_def_cfa} defines a rule for computing CFA as: @i{take
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address from @var{register} and add @var{offset} to it}.
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272
gas/dw2gencfi.c
272
gas/dw2gencfi.c
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@ -88,6 +88,10 @@ struct fde_entry
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symbolS *end_address;
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struct cfi_insn_data *data;
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struct cfi_insn_data **last;
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unsigned char per_encoding;
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unsigned char lsda_encoding;
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expressionS personality;
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expressionS lsda;
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unsigned int return_column;
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unsigned int signal_frame;
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};
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@ -98,6 +102,9 @@ struct cie_entry
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symbolS *start_address;
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unsigned int return_column;
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unsigned int signal_frame;
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unsigned char per_encoding;
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unsigned char lsda_encoding;
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expressionS personality;
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struct cfi_insn_data *first, *last;
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};
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@ -139,6 +146,8 @@ alloc_fde_entry (void)
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fde->last = &fde->data;
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fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN;
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fde->per_encoding = DW_EH_PE_omit;
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fde->lsda_encoding = DW_EH_PE_omit;
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return fde;
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}
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@ -357,6 +366,8 @@ static void dot_cfi (int);
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static void dot_cfi_escape (int);
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static void dot_cfi_startproc (int);
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static void dot_cfi_endproc (int);
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static void dot_cfi_personality (int);
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static void dot_cfi_lsda (int);
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/* Fake CFI type; outside the byte range of any real CFI insn. */
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#define CFI_adjust_cfa_offset 0x100
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@ -385,6 +396,8 @@ const pseudo_typeS cfi_pseudo_table[] =
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{ "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save },
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{ "cfi_escape", dot_cfi_escape, 0 },
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{ "cfi_signal_frame", dot_cfi, CFI_signal_frame },
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{ "cfi_personality", dot_cfi_personality, 0 },
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{ "cfi_lsda", dot_cfi_lsda, 0 },
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{ NULL, NULL, 0 }
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};
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@ -610,6 +623,148 @@ dot_cfi_escape (int ignored ATTRIBUTE_UNUSED)
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demand_empty_rest_of_line ();
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}
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static void
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dot_cfi_personality (int ignored ATTRIBUTE_UNUSED)
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{
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struct fde_entry *fde;
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offsetT encoding;
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if (frchain_now->frch_cfi_data == NULL)
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{
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as_bad (_("CFI instruction used without previous .cfi_startproc"));
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ignore_rest_of_line ();
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return;
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}
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fde = frchain_now->frch_cfi_data->cur_fde_data;
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encoding = get_absolute_expression ();
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if (encoding == DW_EH_PE_omit)
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{
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demand_empty_rest_of_line ();
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fde->per_encoding = encoding;
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return;
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}
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if ((encoding & 0xff) != encoding
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|| ((encoding & 0x70) != 0
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#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
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&& (encoding & 0x70) != DW_EH_PE_pcrel
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#endif
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)
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/* leb128 can be handled, but does something actually need it? */
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|| (encoding & 7) == DW_EH_PE_uleb128
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|| (encoding & 7) > DW_EH_PE_udata8)
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{
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as_bad (_("invalid or unsupported encoding in .cfi_personality"));
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ignore_rest_of_line ();
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return;
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}
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if (*input_line_pointer++ != ',')
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{
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as_bad (_(".cfi_personality requires encoding and symbol arguments"));
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ignore_rest_of_line ();
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return;
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}
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expression_and_evaluate (&fde->personality);
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switch (fde->personality.X_op)
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{
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case O_symbol:
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break;
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case O_constant:
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if ((encoding & 0x70) == DW_EH_PE_pcrel)
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encoding = DW_EH_PE_omit;
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break;
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default:
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encoding = DW_EH_PE_omit;
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break;
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}
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fde->per_encoding = encoding;
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if (encoding == DW_EH_PE_omit)
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{
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as_bad (_("wrong second argument to .cfi_personality"));
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ignore_rest_of_line ();
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return;
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}
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demand_empty_rest_of_line ();
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}
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static void
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dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED)
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{
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struct fde_entry *fde;
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offsetT encoding;
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if (frchain_now->frch_cfi_data == NULL)
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{
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as_bad (_("CFI instruction used without previous .cfi_startproc"));
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ignore_rest_of_line ();
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return;
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}
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fde = frchain_now->frch_cfi_data->cur_fde_data;
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encoding = get_absolute_expression ();
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if (encoding == DW_EH_PE_omit)
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{
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demand_empty_rest_of_line ();
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fde->lsda_encoding = encoding;
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return;
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}
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if ((encoding & 0xff) != encoding
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|| ((encoding & 0x70) != 0
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#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
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&& (encoding & 0x70) != DW_EH_PE_pcrel
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#endif
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)
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/* leb128 can be handled, but does something actually need it? */
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|| (encoding & 7) == DW_EH_PE_uleb128
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|| (encoding & 7) > DW_EH_PE_udata8)
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{
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as_bad (_("invalid or unsupported encoding in .cfi_lsda"));
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ignore_rest_of_line ();
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return;
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}
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if (*input_line_pointer++ != ',')
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{
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as_bad (_(".cfi_lsda requires encoding and symbol arguments"));
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ignore_rest_of_line ();
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return;
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}
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fde->lsda_encoding = encoding;
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expression_and_evaluate (&fde->lsda);
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switch (fde->lsda.X_op)
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{
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case O_symbol:
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break;
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case O_constant:
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if ((encoding & 0x70) == DW_EH_PE_pcrel)
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encoding = DW_EH_PE_omit;
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break;
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default:
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encoding = DW_EH_PE_omit;
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break;
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}
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fde->lsda_encoding = encoding;
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if (encoding == DW_EH_PE_omit)
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{
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as_bad (_("wrong second argument to .cfi_lsda"));
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ignore_rest_of_line ();
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return;
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}
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demand_empty_rest_of_line ();
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}
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static void
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dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED)
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{
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@ -725,18 +880,18 @@ output_cfi_insn (struct cfi_insn_data *insn)
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out_one (DW_CFA_advance_loc + scaled);
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else if (delta <= 0xFF)
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{
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out_one (DW_CFA_advance_loc1);
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out_one (delta);
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out_one (DW_CFA_advance_loc1);
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out_one (delta);
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}
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else if (delta <= 0xFFFF)
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{
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out_one (DW_CFA_advance_loc2);
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out_two (delta);
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out_one (DW_CFA_advance_loc2);
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out_two (delta);
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}
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else
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{
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out_one (DW_CFA_advance_loc4);
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out_four (delta);
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out_one (DW_CFA_advance_loc4);
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out_four (delta);
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}
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}
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else
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@ -861,12 +1016,33 @@ output_cfi_insn (struct cfi_insn_data *insn)
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}
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}
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static offsetT
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encoding_size (unsigned char encoding)
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{
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if (encoding == DW_EH_PE_omit)
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return 0;
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switch (encoding & 0x7)
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{
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case 0:
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return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4;
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case DW_EH_PE_udata2:
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return 2;
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case DW_EH_PE_udata4:
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return 4;
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case DW_EH_PE_udata8:
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return 8;
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default:
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abort ();
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}
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}
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static void
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output_cie (struct cie_entry *cie)
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{
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symbolS *after_size_address, *end_address;
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expressionS exp;
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struct cfi_insn_data *i;
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offsetT augmentation_size;
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cie->start_address = symbol_temp_new_now ();
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after_size_address = symbol_temp_make ();
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@ -882,6 +1058,10 @@ output_cie (struct cie_entry *cie)
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out_four (0); /* CIE id. */
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out_one (DW_CIE_VERSION); /* Version. */
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out_one ('z'); /* Augmentation. */
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if (cie->per_encoding != DW_EH_PE_omit)
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out_one ('P');
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if (cie->lsda_encoding != DW_EH_PE_omit)
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out_one ('L');
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out_one ('R');
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if (cie->signal_frame)
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out_one ('S');
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@ -892,7 +1072,32 @@ output_cie (struct cie_entry *cie)
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out_one (cie->return_column);
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else
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out_uleb128 (cie->return_column);
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out_uleb128 (1); /* Augmentation size. */
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augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit);
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if (cie->per_encoding != DW_EH_PE_omit)
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augmentation_size += 1 + encoding_size (cie->per_encoding);
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out_uleb128 (augmentation_size); /* Augmentation size. */
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if (cie->per_encoding != DW_EH_PE_omit)
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{
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offsetT size = encoding_size (cie->per_encoding);
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out_one (cie->per_encoding);
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exp = cie->personality;
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if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel)
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{
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#ifdef DIFF_EXPR_OK
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exp.X_op = O_subtract;
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exp.X_op_symbol = symbol_temp_new_now ();
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emit_expr (&exp, size);
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#elif defined (tc_cfi_emit_pcrel_expr)
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tc_cfi_emit_pcrel_expr (&exp, size);
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#else
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abort ();
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#endif
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}
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else
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emit_expr (&exp, size);
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}
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if (cie->lsda_encoding != DW_EH_PE_omit)
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out_one (cie->lsda_encoding);
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#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr
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out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4);
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#else
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@ -913,6 +1118,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
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{
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symbolS *after_size_address, *end_address;
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expressionS exp;
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offsetT augmentation_size;
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after_size_address = symbol_temp_make ();
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end_address = symbol_temp_make ();
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@ -928,7 +1134,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
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exp.X_op_symbol = cie->start_address;
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emit_expr (&exp, 4); /* CIE offset. */
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#ifdef DIFF_EXPR_OK
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#ifdef DIFF_EXPR_OK
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exp.X_add_symbol = fde->start_address;
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exp.X_op_symbol = symbol_temp_new_now ();
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emit_expr (&exp, 4); /* Code offset. */
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@ -948,7 +1154,27 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie,
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exp.X_op_symbol = fde->start_address; /* Code length. */
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emit_expr (&exp, 4);
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out_uleb128 (0); /* Augmentation size. */
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augmentation_size = encoding_size (fde->lsda_encoding);
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out_uleb128 (augmentation_size); /* Augmentation size. */
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if (fde->lsda_encoding != DW_EH_PE_omit)
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{
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exp = fde->lsda;
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if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel)
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{
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#ifdef DIFF_EXPR_OK
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exp.X_op = O_subtract;
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exp.X_op_symbol = symbol_temp_new_now ();
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emit_expr (&exp, augmentation_size);
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#elif defined (tc_cfi_emit_pcrel_expr)
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tc_cfi_emit_pcrel_expr (&exp, augmentation_size);
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#else
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abort ();
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#endif
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}
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else
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emit_expr (&exp, augmentation_size);
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}
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for (; first; first = first->next)
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output_cfi_insn (first);
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@ -966,8 +1192,31 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
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for (cie = cie_root; cie; cie = cie->next)
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{
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if (cie->return_column != fde->return_column
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|| cie->signal_frame != fde->signal_frame)
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|| cie->signal_frame != fde->signal_frame
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|| cie->per_encoding != fde->per_encoding
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|| cie->lsda_encoding != fde->lsda_encoding)
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continue;
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if (cie->per_encoding != DW_EH_PE_omit)
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{
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if (cie->personality.X_op != fde->personality.X_op
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|| cie->personality.X_add_number
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!= fde->personality.X_add_number)
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continue;
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switch (cie->personality.X_op)
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{
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case O_constant:
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if (cie->personality.X_unsigned != fde->personality.X_unsigned)
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continue;
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break;
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case O_symbol:
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if (cie->personality.X_add_symbol
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!= fde->personality.X_add_symbol)
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continue;
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break;
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default:
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abort ();
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}
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}
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for (i = cie->first, j = fde->data;
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i != cie->last && j != NULL;
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i = i->next, j = j->next)
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@ -1040,6 +1289,9 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst)
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cie_root = cie;
|
||||
cie->return_column = fde->return_column;
|
||||
cie->signal_frame = fde->signal_frame;
|
||||
cie->per_encoding = fde->per_encoding;
|
||||
cie->lsda_encoding = fde->lsda_encoding;
|
||||
cie->personality = fde->personality;
|
||||
cie->first = fde->data;
|
||||
|
||||
for (i = cie->first; i ; i = i->next)
|
||||
|
|
|
|||
|
|
@ -1,5 +1,9 @@
|
|||
2006-11-03 Jakub Jelinek <jakub@redhat.com>
|
||||
|
||||
* gas/cfi/cfi-common-6.d: New test.
|
||||
* gas/cfi/cfi-common-6.s: New.
|
||||
* gas/cfi/cfi.exp: Add cfi-common-6 test.
|
||||
|
||||
* gas/cfi/cfi-common-5.d: New test.
|
||||
* gas/cfi/cfi-common-5.s: New.
|
||||
* gas/cfi/cfi.exp: Add cfi-common-5 test.
|
||||
|
|
|
|||
73
gas/testsuite/gas/cfi/cfi-common-6.d
Normal file
73
gas/testsuite/gas/cfi/cfi-common-6.d
Normal file
|
|
@ -0,0 +1,73 @@
|
|||
#readelf: -wf
|
||||
#name: CFI common 6
|
||||
The section .eh_frame contains:
|
||||
|
||||
00000000 00000018 00000000 CIE
|
||||
Version: 1
|
||||
Augmentation: "zPLR"
|
||||
Code alignment factor: .*
|
||||
Data alignment factor: .*
|
||||
Return address column: .*
|
||||
Augmentation data: 03 .. .. .. .. 0c 1b
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
0000001c 00000018 00000020 FDE cie=00000000 pc=00000000..00000004
|
||||
Augmentation data: (00 00 00 00 de ad be ef|ef be ad de 00 00 00 00)
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
00000038 00000010 00000000 CIE
|
||||
Version: 1
|
||||
Augmentation: "zLR"
|
||||
Code alignment factor: .*
|
||||
Data alignment factor: .*
|
||||
Return address column: .*
|
||||
Augmentation data: 0c 1b
|
||||
|
||||
DW_CFA_nop
|
||||
|
||||
0000004c 00000018 00000018 FDE cie=00000038 pc=00000004..00000008
|
||||
Augmentation data: (00 00 00 00 de ad be ef|ef be ad de 00 00 00 00)
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
00000068 00000018 0000006c FDE cie=00000000 pc=00000008..0000000c
|
||||
Augmentation data: (00 00 00 00 be ef de ad|ad de ef be 00 00 00 00)
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
00000084 00000018 00000000 CIE
|
||||
Version: 1
|
||||
Augmentation: "zPLR"
|
||||
Code alignment factor: .*
|
||||
Data alignment factor: .*
|
||||
Return address column: .*
|
||||
Augmentation data: 1b .. .. .. .. 1b 1b
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
000000a0 00000014 00000020 FDE cie=00000084 pc=0000000c..00000010
|
||||
Augmentation data: .. .. .. ..
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
000000b8 00000014 00000038 FDE cie=00000084 pc=00000010..00000014
|
||||
Augmentation data: .. .. .. ..
|
||||
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
DW_CFA_nop
|
||||
|
||||
40
gas/testsuite/gas/cfi/cfi-common-6.s
Normal file
40
gas/testsuite/gas/cfi/cfi-common-6.s
Normal file
|
|
@ -0,0 +1,40 @@
|
|||
.text
|
||||
.cfi_startproc simple
|
||||
.cfi_personality 3, my_personality_v0
|
||||
.cfi_lsda 12, 0xdeadbeef
|
||||
.long 0
|
||||
.cfi_endproc
|
||||
|
||||
.cfi_startproc simple
|
||||
.cfi_personality 3, my_personality_v0
|
||||
.cfi_lsda 12, 0xdeadbeef
|
||||
.cfi_personality 0xff
|
||||
.long 0
|
||||
.cfi_endproc
|
||||
|
||||
.cfi_startproc simple
|
||||
.cfi_personality 3, my_personality_v0
|
||||
.cfi_lsda 12, 0xbeefdead
|
||||
.long 0
|
||||
.cfi_endproc
|
||||
|
||||
.cfi_startproc simple
|
||||
.cfi_personality (0x10 | 11), my_personality_v1
|
||||
.cfi_lsda 27, 1f
|
||||
.long 0
|
||||
.cfi_endproc
|
||||
|
||||
.cfi_startproc simple
|
||||
.cfi_personality (0x10 | 11), my_personality_v1
|
||||
.cfi_lsda 27, 2f
|
||||
.long 0
|
||||
.cfi_endproc
|
||||
|
||||
my_personality_v0:
|
||||
.long 0
|
||||
my_personality_v1:
|
||||
.long 0
|
||||
1:
|
||||
.long 0
|
||||
2:
|
||||
.long 0
|
||||
|
|
@ -73,3 +73,4 @@ run_dump_test "cfi-common-2"
|
|||
run_dump_test "cfi-common-3"
|
||||
run_dump_test "cfi-common-4"
|
||||
run_dump_test "cfi-common-5"
|
||||
run_dump_test "cfi-common-6"
|
||||
|
|
|
|||
Loading…
Reference in a new issue