diff options
Diffstat (limited to 'contrib/binutils/gas/dw2gencfi.c')
| -rw-r--r-- | contrib/binutils/gas/dw2gencfi.c | 361 |
1 files changed, 312 insertions, 49 deletions
diff --git a/contrib/binutils/gas/dw2gencfi.c b/contrib/binutils/gas/dw2gencfi.c index bfa5d5c..97e1237 100644 --- a/contrib/binutils/gas/dw2gencfi.c +++ b/contrib/binutils/gas/dw2gencfi.c @@ -21,6 +21,7 @@ #include "as.h" #include "dw2gencfi.h" +#include "subsegs.h" /* We re-use DWARF2_LINE_MIN_INSN_LENGTH for the code alignment field @@ -87,6 +88,10 @@ struct fde_entry symbolS *end_address; struct cfi_insn_data *data; struct cfi_insn_data **last; + unsigned char per_encoding; + unsigned char lsda_encoding; + expressionS personality; + expressionS lsda; unsigned int return_column; unsigned int signal_frame; }; @@ -97,15 +102,13 @@ struct cie_entry symbolS *start_address; unsigned int return_column; unsigned int signal_frame; + unsigned char per_encoding; + unsigned char lsda_encoding; + expressionS personality; struct cfi_insn_data *first, *last; }; -/* Current open FDE entry. */ -static struct fde_entry *cur_fde_data; -static symbolS *last_address; -static offsetT cur_cfa_offset; - /* List of FDE entries. */ static struct fde_entry *all_fde_data; static struct fde_entry **last_fde_data = &all_fde_data; @@ -120,7 +123,14 @@ struct cfa_save_data offsetT cfa_offset; }; -static struct cfa_save_data *cfa_save_stack; +/* Current open FDE entry. */ +struct frch_cfi_data +{ + struct fde_entry *cur_fde_data; + symbolS *last_address; + offsetT cur_cfa_offset; + struct cfa_save_data *cfa_save_stack; +}; /* Construct a new FDE structure and add it to the end of the fde list. */ @@ -129,12 +139,15 @@ alloc_fde_entry (void) { struct fde_entry *fde = xcalloc (1, sizeof (struct fde_entry)); - cur_fde_data = fde; + frchain_now->frch_cfi_data = xcalloc (1, sizeof (struct frch_cfi_data)); + frchain_now->frch_cfi_data->cur_fde_data = fde; *last_fde_data = fde; last_fde_data = &fde->next; fde->last = &fde->data; fde->return_column = DWARF2_DEFAULT_RETURN_COLUMN; + fde->per_encoding = DW_EH_PE_omit; + fde->lsda_encoding = DW_EH_PE_omit; return fde; } @@ -149,6 +162,7 @@ static struct cfi_insn_data * alloc_cfi_insn_data (void) { struct cfi_insn_data *insn = xcalloc (1, sizeof (struct cfi_insn_data)); + struct fde_entry *cur_fde_data = frchain_now->frch_cfi_data->cur_fde_data; *cur_fde_data->last = insn; cur_fde_data->last = &insn->next; @@ -163,7 +177,7 @@ cfi_new_fde (symbolS *label) { struct fde_entry *fde = alloc_fde_entry (); fde->start_address = label; - last_address = label; + frchain_now->frch_cfi_data->last_address = label; } /* End the currently open FDE. */ @@ -171,8 +185,9 @@ cfi_new_fde (symbolS *label) void cfi_end_fde (symbolS *label) { - cur_fde_data->end_address = label; - cur_fde_data = NULL; + frchain_now->frch_cfi_data->cur_fde_data->end_address = label; + free (frchain_now->frch_cfi_data); + frchain_now->frch_cfi_data = NULL; } /* Set the return column for the current FDE. */ @@ -180,7 +195,7 @@ cfi_end_fde (symbolS *label) void cfi_set_return_column (unsigned regno) { - cur_fde_data->return_column = regno; + frchain_now->frch_cfi_data->cur_fde_data->return_column = regno; } /* Universal functions to store new instructions. */ @@ -239,10 +254,10 @@ cfi_add_advance_loc (symbolS *label) struct cfi_insn_data *insn = alloc_cfi_insn_data (); insn->insn = DW_CFA_advance_loc; - insn->u.ll.lab1 = last_address; + insn->u.ll.lab1 = frchain_now->frch_cfi_data->last_address; insn->u.ll.lab2 = label; - last_address = label; + frchain_now->frch_cfi_data->last_address = label; } /* Add a DW_CFA_offset record to the CFI data. */ @@ -252,6 +267,7 @@ cfi_add_CFA_offset (unsigned regno, offsetT offset) { unsigned int abs_data_align; + assert (DWARF2_CIE_DATA_ALIGNMENT != 0); cfi_add_CFA_insn_reg_offset (DW_CFA_offset, regno, offset); abs_data_align = (DWARF2_CIE_DATA_ALIGNMENT < 0 @@ -266,7 +282,7 @@ void cfi_add_CFA_def_cfa (unsigned regno, offsetT offset) { cfi_add_CFA_insn_reg_offset (DW_CFA_def_cfa, regno, offset); - cur_cfa_offset = offset; + frchain_now->frch_cfi_data->cur_cfa_offset = offset; } /* Add a DW_CFA_register record to the CFI data. */ @@ -291,7 +307,7 @@ void cfi_add_CFA_def_cfa_offset (offsetT offset) { cfi_add_CFA_insn_offset (DW_CFA_def_cfa_offset, offset); - cur_cfa_offset = offset; + frchain_now->frch_cfi_data->cur_cfa_offset = offset; } void @@ -320,9 +336,9 @@ cfi_add_CFA_remember_state (void) cfi_add_CFA_insn (DW_CFA_remember_state); p = xmalloc (sizeof (*p)); - p->cfa_offset = cur_cfa_offset; - p->next = cfa_save_stack; - cfa_save_stack = p; + p->cfa_offset = frchain_now->frch_cfi_data->cur_cfa_offset; + p->next = frchain_now->frch_cfi_data->cfa_save_stack; + frchain_now->frch_cfi_data->cfa_save_stack = p; } void @@ -332,11 +348,11 @@ cfi_add_CFA_restore_state (void) cfi_add_CFA_insn (DW_CFA_restore_state); - p = cfa_save_stack; + p = frchain_now->frch_cfi_data->cfa_save_stack; if (p) { - cur_cfa_offset = p->cfa_offset; - cfa_save_stack = p->next; + frchain_now->frch_cfi_data->cur_cfa_offset = p->cfa_offset; + frchain_now->frch_cfi_data->cfa_save_stack = p->next; free (p); } else @@ -350,6 +366,8 @@ static void dot_cfi (int); static void dot_cfi_escape (int); static void dot_cfi_startproc (int); static void dot_cfi_endproc (int); +static void dot_cfi_personality (int); +static void dot_cfi_lsda (int); /* Fake CFI type; outside the byte range of any real CFI insn. */ #define CFI_adjust_cfa_offset 0x100 @@ -378,6 +396,8 @@ const pseudo_typeS cfi_pseudo_table[] = { "cfi_window_save", dot_cfi, DW_CFA_GNU_window_save }, { "cfi_escape", dot_cfi_escape, 0 }, { "cfi_signal_frame", dot_cfi, CFI_signal_frame }, + { "cfi_personality", dot_cfi_personality, 0 }, + { "cfi_lsda", dot_cfi_lsda, 0 }, { NULL, NULL, 0 } }; @@ -448,7 +468,7 @@ dot_cfi (int arg) offsetT offset; unsigned reg1, reg2; - if (!cur_fde_data) + if (frchain_now->frch_cfi_data == NULL) { as_bad (_("CFI instruction used without previous .cfi_startproc")); ignore_rest_of_line (); @@ -456,8 +476,9 @@ dot_cfi (int arg) } /* If the last address was not at the current PC, advance to current. */ - if (symbol_get_frag (last_address) != frag_now - || S_GET_VALUE (last_address) != frag_now_fix ()) + if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now + || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) + != frag_now_fix ()) cfi_add_advance_loc (symbol_temp_new_now ()); switch (arg) @@ -473,7 +494,8 @@ dot_cfi (int arg) reg1 = cfi_parse_reg (); cfi_parse_separator (); offset = cfi_parse_const (); - cfi_add_CFA_offset (reg1, offset - cur_cfa_offset); + cfi_add_CFA_offset (reg1, + offset - frchain_now->frch_cfi_data->cur_cfa_offset); break; case DW_CFA_def_cfa: @@ -502,7 +524,8 @@ dot_cfi (int arg) case CFI_adjust_cfa_offset: offset = cfi_parse_const (); - cfi_add_CFA_def_cfa_offset (cur_cfa_offset + offset); + cfi_add_CFA_def_cfa_offset (frchain_now->frch_cfi_data->cur_cfa_offset + + offset); break; case DW_CFA_restore: @@ -552,7 +575,7 @@ dot_cfi (int arg) break; case CFI_signal_frame: - cur_fde_data->signal_frame = 1; + frchain_now->frch_cfi_data->cur_fde_data->signal_frame = 1; break; default: @@ -568,7 +591,7 @@ dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) struct cfi_escape_data *head, **tail, *e; struct cfi_insn_data *insn; - if (!cur_fde_data) + if (frchain_now->frch_cfi_data == NULL) { as_bad (_("CFI instruction used without previous .cfi_startproc")); ignore_rest_of_line (); @@ -576,8 +599,9 @@ dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) } /* If the last address was not at the current PC, advance to current. */ - if (symbol_get_frag (last_address) != frag_now - || S_GET_VALUE (last_address) != frag_now_fix ()) + if (symbol_get_frag (frchain_now->frch_cfi_data->last_address) != frag_now + || S_GET_VALUE (frchain_now->frch_cfi_data->last_address) + != frag_now_fix ()) cfi_add_advance_loc (symbol_temp_new_now ()); tail = &head; @@ -600,11 +624,153 @@ dot_cfi_escape (int ignored ATTRIBUTE_UNUSED) } static void +dot_cfi_personality (int ignored ATTRIBUTE_UNUSED) +{ + struct fde_entry *fde; + offsetT encoding; + + if (frchain_now->frch_cfi_data == NULL) + { + as_bad (_("CFI instruction used without previous .cfi_startproc")); + ignore_rest_of_line (); + return; + } + + fde = frchain_now->frch_cfi_data->cur_fde_data; + encoding = get_absolute_expression (); + if (encoding == DW_EH_PE_omit) + { + demand_empty_rest_of_line (); + fde->per_encoding = encoding; + return; + } + + if ((encoding & 0xff) != encoding + || ((encoding & 0x70) != 0 +#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr + && (encoding & 0x70) != DW_EH_PE_pcrel +#endif + ) + /* leb128 can be handled, but does something actually need it? */ + || (encoding & 7) == DW_EH_PE_uleb128 + || (encoding & 7) > DW_EH_PE_udata8) + { + as_bad (_("invalid or unsupported encoding in .cfi_personality")); + ignore_rest_of_line (); + return; + } + + if (*input_line_pointer++ != ',') + { + as_bad (_(".cfi_personality requires encoding and symbol arguments")); + ignore_rest_of_line (); + return; + } + + expression_and_evaluate (&fde->personality); + switch (fde->personality.X_op) + { + case O_symbol: + break; + case O_constant: + if ((encoding & 0x70) == DW_EH_PE_pcrel) + encoding = DW_EH_PE_omit; + break; + default: + encoding = DW_EH_PE_omit; + break; + } + + fde->per_encoding = encoding; + + if (encoding == DW_EH_PE_omit) + { + as_bad (_("wrong second argument to .cfi_personality")); + ignore_rest_of_line (); + return; + } + + demand_empty_rest_of_line (); +} + +static void +dot_cfi_lsda (int ignored ATTRIBUTE_UNUSED) +{ + struct fde_entry *fde; + offsetT encoding; + + if (frchain_now->frch_cfi_data == NULL) + { + as_bad (_("CFI instruction used without previous .cfi_startproc")); + ignore_rest_of_line (); + return; + } + + fde = frchain_now->frch_cfi_data->cur_fde_data; + encoding = get_absolute_expression (); + if (encoding == DW_EH_PE_omit) + { + demand_empty_rest_of_line (); + fde->lsda_encoding = encoding; + return; + } + + if ((encoding & 0xff) != encoding + || ((encoding & 0x70) != 0 +#if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr + && (encoding & 0x70) != DW_EH_PE_pcrel +#endif + ) + /* leb128 can be handled, but does something actually need it? */ + || (encoding & 7) == DW_EH_PE_uleb128 + || (encoding & 7) > DW_EH_PE_udata8) + { + as_bad (_("invalid or unsupported encoding in .cfi_lsda")); + ignore_rest_of_line (); + return; + } + + if (*input_line_pointer++ != ',') + { + as_bad (_(".cfi_lsda requires encoding and symbol arguments")); + ignore_rest_of_line (); + return; + } + + fde->lsda_encoding = encoding; + + expression_and_evaluate (&fde->lsda); + switch (fde->lsda.X_op) + { + case O_symbol: + break; + case O_constant: + if ((encoding & 0x70) == DW_EH_PE_pcrel) + encoding = DW_EH_PE_omit; + break; + default: + encoding = DW_EH_PE_omit; + break; + } + + fde->lsda_encoding = encoding; + + if (encoding == DW_EH_PE_omit) + { + as_bad (_("wrong second argument to .cfi_lsda")); + ignore_rest_of_line (); + return; + } + + demand_empty_rest_of_line (); +} + +static void dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) { int simple = 0; - if (cur_fde_data) + if (frchain_now->frch_cfi_data != NULL) { as_bad (_("previous CFI entry not closed (missing .cfi_endproc)")); ignore_rest_of_line (); @@ -631,7 +797,7 @@ dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) } demand_empty_rest_of_line (); - cur_cfa_offset = 0; + frchain_now->frch_cfi_data->cur_cfa_offset = 0; if (!simple) tc_cfi_frame_initial_instructions (); } @@ -639,7 +805,7 @@ dot_cfi_startproc (int ignored ATTRIBUTE_UNUSED) static void dot_cfi_endproc (int ignored ATTRIBUTE_UNUSED) { - if (! cur_fde_data) + if (frchain_now->frch_cfi_data == NULL) { as_bad (_(".cfi_endproc without corresponding .cfi_startproc")); ignore_rest_of_line (); @@ -714,18 +880,18 @@ output_cfi_insn (struct cfi_insn_data *insn) out_one (DW_CFA_advance_loc + scaled); else if (delta <= 0xFF) { - out_one (DW_CFA_advance_loc1); - out_one (delta); + out_one (DW_CFA_advance_loc1); + out_one (delta); } else if (delta <= 0xFFFF) { - out_one (DW_CFA_advance_loc2); - out_two (delta); + out_one (DW_CFA_advance_loc2); + out_two (delta); } else { - out_one (DW_CFA_advance_loc4); - out_four (delta); + out_one (DW_CFA_advance_loc4); + out_four (delta); } } else @@ -850,12 +1016,33 @@ output_cfi_insn (struct cfi_insn_data *insn) } } +static offsetT +encoding_size (unsigned char encoding) +{ + if (encoding == DW_EH_PE_omit) + return 0; + switch (encoding & 0x7) + { + case 0: + return bfd_get_arch_size (stdoutput) == 64 ? 8 : 4; + case DW_EH_PE_udata2: + return 2; + case DW_EH_PE_udata4: + return 4; + case DW_EH_PE_udata8: + return 8; + default: + abort (); + } +} + static void output_cie (struct cie_entry *cie) { symbolS *after_size_address, *end_address; expressionS exp; struct cfi_insn_data *i; + offsetT augmentation_size; cie->start_address = symbol_temp_new_now (); after_size_address = symbol_temp_make (); @@ -871,6 +1058,10 @@ output_cie (struct cie_entry *cie) out_four (0); /* CIE id. */ out_one (DW_CIE_VERSION); /* Version. */ out_one ('z'); /* Augmentation. */ + if (cie->per_encoding != DW_EH_PE_omit) + out_one ('P'); + if (cie->lsda_encoding != DW_EH_PE_omit) + out_one ('L'); out_one ('R'); if (cie->signal_frame) out_one ('S'); @@ -881,7 +1072,32 @@ output_cie (struct cie_entry *cie) out_one (cie->return_column); else out_uleb128 (cie->return_column); - out_uleb128 (1); /* Augmentation size. */ + augmentation_size = 1 + (cie->lsda_encoding != DW_EH_PE_omit); + if (cie->per_encoding != DW_EH_PE_omit) + augmentation_size += 1 + encoding_size (cie->per_encoding); + out_uleb128 (augmentation_size); /* Augmentation size. */ + if (cie->per_encoding != DW_EH_PE_omit) + { + offsetT size = encoding_size (cie->per_encoding); + out_one (cie->per_encoding); + exp = cie->personality; + if ((cie->per_encoding & 0x70) == DW_EH_PE_pcrel) + { +#ifdef DIFF_EXPR_OK + exp.X_op = O_subtract; + exp.X_op_symbol = symbol_temp_new_now (); + emit_expr (&exp, size); +#elif defined (tc_cfi_emit_pcrel_expr) + tc_cfi_emit_pcrel_expr (&exp, size); +#else + abort (); +#endif + } + else + emit_expr (&exp, size); + } + if (cie->lsda_encoding != DW_EH_PE_omit) + out_one (cie->lsda_encoding); #if defined DIFF_EXPR_OK || defined tc_cfi_emit_pcrel_expr out_one (DW_EH_PE_pcrel | DW_EH_PE_sdata4); #else @@ -902,6 +1118,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie, { symbolS *after_size_address, *end_address; expressionS exp; + offsetT augmentation_size; after_size_address = symbol_temp_make (); end_address = symbol_temp_make (); @@ -917,7 +1134,7 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie, exp.X_op_symbol = cie->start_address; emit_expr (&exp, 4); /* CIE offset. */ -#ifdef DIFF_EXPR_OK +#ifdef DIFF_EXPR_OK exp.X_add_symbol = fde->start_address; exp.X_op_symbol = symbol_temp_new_now (); emit_expr (&exp, 4); /* Code offset. */ @@ -937,7 +1154,27 @@ output_fde (struct fde_entry *fde, struct cie_entry *cie, exp.X_op_symbol = fde->start_address; /* Code length. */ emit_expr (&exp, 4); - out_uleb128 (0); /* Augmentation size. */ + augmentation_size = encoding_size (fde->lsda_encoding); + out_uleb128 (augmentation_size); /* Augmentation size. */ + + if (fde->lsda_encoding != DW_EH_PE_omit) + { + exp = fde->lsda; + if ((fde->lsda_encoding & 0x70) == DW_EH_PE_pcrel) + { +#ifdef DIFF_EXPR_OK + exp.X_op = O_subtract; + exp.X_op_symbol = symbol_temp_new_now (); + emit_expr (&exp, augmentation_size); +#elif defined (tc_cfi_emit_pcrel_expr) + tc_cfi_emit_pcrel_expr (&exp, augmentation_size); +#else + abort (); +#endif + } + else + emit_expr (&exp, augmentation_size); + } for (; first; first = first->next) output_cfi_insn (first); @@ -955,8 +1192,31 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst) for (cie = cie_root; cie; cie = cie->next) { if (cie->return_column != fde->return_column - || cie->signal_frame != fde->signal_frame) + || cie->signal_frame != fde->signal_frame + || cie->per_encoding != fde->per_encoding + || cie->lsda_encoding != fde->lsda_encoding) continue; + if (cie->per_encoding != DW_EH_PE_omit) + { + if (cie->personality.X_op != fde->personality.X_op + || cie->personality.X_add_number + != fde->personality.X_add_number) + continue; + switch (cie->personality.X_op) + { + case O_constant: + if (cie->personality.X_unsigned != fde->personality.X_unsigned) + continue; + break; + case O_symbol: + if (cie->personality.X_add_symbol + != fde->personality.X_add_symbol) + continue; + break; + default: + abort (); + } + } for (i = cie->first, j = fde->data; i != cie->last && j != NULL; i = i->next, j = j->next) @@ -1029,6 +1289,9 @@ select_cie_for_fde (struct fde_entry *fde, struct cfi_insn_data **pfirst) 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) @@ -1052,12 +1315,6 @@ cfi_finish (void) struct fde_entry *fde; int save_flag_traditional_format; - if (cur_fde_data) - { - as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); - cur_fde_data->end_address = cur_fde_data->start_address; - } - if (all_fde_data == 0) return; @@ -1077,6 +1334,12 @@ cfi_finish (void) struct cfi_insn_data *first; struct cie_entry *cie; + if (fde->end_address == NULL) + { + as_bad (_("open CFI at the end of file; missing .cfi_endproc directive")); + fde->end_address = fde->start_address; + } + cie = select_cie_for_fde (fde, &first); output_fde (fde, cie, first, fde->next == NULL ? EH_FRAME_ALIGNMENT : 2); } |
