--- /dev/null
+/* seh pdata/xdata coff object file format
+ Copyright 2009
+ Free Software Foundation, Inc.
+
+ This file is part of GAS.
+
+ GAS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
+
+ GAS is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GAS; see the file COPYING. If not, write to the Free
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+#include "obj-coff-seh.h"
+
+/* Forward declarations. */
+static seh_kind seh_get_target_kind (void);
+static int seh_symbol (bfd *, const char *, const char *, const char *, asection *, int, int);
+static void seh_reloc (bfd *, bfd_size_type, int, int);
+static void save_relocs (asection *sec);
+static asection *quick_section (bfd *abfd, const char *name, int flags, int align);
+static void seh_symbol_init (bfd *abfd, unsigned int added);
+static void seh_emit_rva (const char *);
+static void seh_emit_long (const char *);
+static void seh_make_globl (char *);
+static segT seh_make_section (void);
+static segT seh_make_section2 (const char *section_name, unsigned flags);
+static char *seh_make_xlbl_name (seh_context *);
+static char *make_seh_text_label (seh_context *c, symbolS **addr);
+
+static void seh_write_text_eh_data (const char *hnd, const char *hnd_data);
+static void seh_emit_rva (const char *name);
+static int seh_needed_unwind_info (seh_context *);
+static void seh_fill_pcsyms (const seh_context *c, char **, int *);
+static size_t seh_getelm_data_size (const seh_context *, int, int);
+static size_t seh_getsize_of_unwind_entry (seh_context *, int, int, int);
+static void seh_make_unwind_entry (const seh_context *, char *, int, int, int, unsigned char *, size_t *, int);
+static size_t seh_getsize_unwind_data (seh_context *);
+static void seh_create_unwind_data (seh_context *, unsigned char *, size_t);
+static void seh_make_function_entry_xdata (seh_context *, char *, char *, char *, unsigned char *, size_t *,int);
+static seh_scope_elem *seh_x64_makescope_elem (seh_context *, const char *, const char *, const char *, const char *);
+
+/* Local data. */
+static asymbol **symtab;
+static int symptr;
+static arelent *reltab = 0;
+static int relcount = 0, relsize = 0;
+
+static seh_context *seh_ctx_root = NULL;
+static seh_context *seh_ctx = NULL;
+static seh_context *seh_ctx_cur = NULL;
+
+/* Write xdata for arm, sh3, sh4, and ppc. */
+
+static void
+seh_write_text_eh_data (const char *hnd, const char *hnd_data)
+{
+ if (!hnd || *hnd==0)
+ return;
+ if (hnd[0] == '@')
+ seh_emit_long ("0");
+ else
+ seh_emit_long (hnd);
+ if (!hnd_data || hnd_data[0] == '@')
+ seh_emit_long ("0");
+ else
+ seh_emit_long (hnd_data);
+}
+
+/* Generate initial pdata for x64 and mips. */
+static void
+make_function_entry_pdata (seh_context *c)
+{
+ segT sec = NULL;
+ segT current_seg = now_seg;
+ subsegT current_subseg = now_subseg;
+
+ sec = seh_make_section ();
+ switch (seh_get_target_kind ())
+ {
+ case seh_kind_x64:
+ subseg_set (sec, 0);
+ seh_emit_rva (c->func_name);
+ seh_emit_rva (c->end_symbol);
+ seh_emit_rva (c->xdata_first);
+ break;
+ case seh_kind_mips:
+ subseg_set (sec, 0);
+ seh_emit_long (c->func_name);
+ seh_emit_long (c->end_symbol);
+ if (c->handler_name == NULL)
+ seh_emit_long ("0");
+ else if (c->handler_name[0] == '@')
+ {
+ if (strcasecmp (c->handler_name, "@1") == 0)
+ seh_emit_long ("1");
+ else
+ seh_emit_long ("0");
+ }
+ else
+ seh_emit_long (c->handler_name);
+ if (c->handler_data_name == NULL || c->handler_data_name[0] == '@')
+ seh_emit_long ("0");
+ else
+ seh_emit_long (c->handler_data_name);
+ seh_emit_long (c->endprologue_symbol ? c->endprologue_symbol : c->func_name);
+ break;
+ default:
+ break;
+ }
+ subseg_set (current_seg, current_subseg);
+}
+
+static void
+seh_x64_write_xdata (void)
+{
+ seh_context *h;
+ size_t xdata_size = 0, count_syms = 0;
+ size_t xdata_offs = 0;
+ unsigned char *data;
+ segT seg_xdata;
+ bfd *abfd = stdoutput;
+
+ h = seh_ctx_root;
+ if (!h || h->done)
+ return;
+ while (h != NULL)
+ {
+ h->xdata_offset = xdata_size;
+ xdata_size += seh_getsize_unwind_data (h);
+ count_syms += h->count_syms;
+ h = h->next;
+ }
+
+ if (xdata_size == 0)
+ return;
+
+ seh_symbol_init (abfd, count_syms);
+ data = xmalloc (xdata_size);
+ seg_xdata = quick_section (abfd, ".xdata", SEC_HAS_CONTENTS, 3);
+ seg_xdata->contents = data;
+ memset (data, 0, xdata_size);
+ bfd_set_section_size (abfd, seg_xdata, xdata_size);
+ h = seh_ctx_root;
+ while (h != NULL)
+ {
+ xdata_offs = h->xdata_offset;
+ h->section = seg_xdata;
+ h->abfd = abfd;
+ if (h->done == 0)
+ {
+ h->done = 1;
+ seh_create_unwind_data (h, data, xdata_offs);
+ h->done = 1;
+ }
+ h = h->next;
+ }
+ save_relocs (seg_xdata);
+ bfd_set_symtab (abfd, symtab, symptr);
+ bfd_set_section_contents (abfd, seg_xdata, data, 0, xdata_size);
+}
+
+static void
+seh_arm_create_pdata (seh_context *c, unsigned char *data, size_t pdata_offs)
+{
+ int idx;
+ unsigned int val;
+ valueT func_len = 0;
+ valueT prolog_len = 0;
+ valueT start_len = 0;
+
+ func_len = resolve_symbol_value (c->end_addr);
+ start_len = resolve_symbol_value (c->start_addr);
+ if (c->endprologue_addr)
+ prolog_len = resolve_symbol_value (c->endprologue_addr);
+ else
+ prolog_len = start_len;
+ func_len -= start_len;
+ prolog_len -= start_len;
+ if (!c || !data)
+ return;
+ /* $$$$ */
+ idx = seh_symbol (c->abfd, c->start_symbol, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, pdata_offs, BFD_RELOC_32, idx);
+ val = (unsigned int) func_len;
+ val <<= 8;
+ val |= ((unsigned int) prolog_len & 0xffU);
+ if (c->use_instruction_32)
+ val |= 0x40000000U;
+ if (c->handler_written)
+ val |= 0x80000000U;
+ bfd_put_32 (c->abfd, (bfd_vma) val, data + pdata_offs + 4);
+}
+
+static void
+seh_arm_write_pdata (void)
+{
+ seh_context *h;
+ size_t pdata_size = 0, count_syms = 0;
+ size_t pdata_offs = 0;
+ unsigned char *data;
+ segT seg_pdata;
+ bfd *abfd = stdoutput;
+
+ h = seh_ctx_root;
+ if (h == NULL || h->done)
+ return;
+ while (h != NULL)
+ {
+ h->xdata_offset = pdata_size;
+ pdata_size += 8;
+ count_syms += 1;
+ h = h->next;
+ }
+
+ if (pdata_size == 0)
+ return;
+
+ seh_symbol_init (abfd, count_syms);
+ data = xmalloc (pdata_size);
+ seg_pdata = quick_section (abfd, ".pdata", SEC_HAS_CONTENTS, 3);
+ seg_pdata->contents = data;
+ memset (data, 0, pdata_size);
+ bfd_set_section_size (abfd, seg_pdata, pdata_size);
+ h = seh_ctx_root;
+ while (h != NULL)
+ {
+ pdata_offs = h->xdata_offset;
+ h->section = seg_pdata;
+ h->abfd = abfd;
+ if (h->done != 0)
+ {
+ seh_arm_create_pdata (h, data, pdata_offs);
+ h->done = 1;
+ }
+ h = h->next;
+ }
+ save_relocs (seg_pdata);
+ bfd_set_symtab (abfd, symtab, symptr);
+ bfd_set_section_contents (abfd, seg_pdata, data, 0, pdata_size);
+}
+
+void
+obj_coff_seh_do_final (void)
+{
+ switch (seh_get_target_kind ())
+ {
+ case seh_kind_mips:
+ default:
+ break;
+ case seh_kind_arm:
+ seh_arm_write_pdata ();
+ break;
+ case seh_kind_x64:
+ seh_x64_write_xdata ();
+ break;
+ }
+}
+
+static void
+seh_x64_make_prologue_element (int kind, int reg, bfd_vma off)
+{
+ seh_prologue_element *n;
+
+ if (seh_ctx_cur == NULL)
+ return;
+ if (seh_ctx_cur->elems_count == seh_ctx_cur->elems_max)
+ {
+ seh_ctx_cur->elems = (seh_prologue_element *)
+ xrealloc (seh_ctx_cur->elems,
+ ((seh_ctx_cur->elems_max + 8) * sizeof (seh_prologue_element)));
+ seh_ctx_cur->elems_max += 8;
+ }
+ n = &seh_ctx_cur->elems[seh_ctx_cur->elems_count];
+ memset (n, 0, sizeof (seh_prologue_element));
+ n->kind = kind;
+ n->reg = reg;
+ n->offset = off;
+ n->pc_symbol = make_seh_text_label (seh_ctx_cur, &(n->pc_addr));
+ seh_ctx_cur->elems_count += 1;
+}
+
+static int
+seh_x64_read_reg (const char *tok, int kind, int *regno)
+{
+ static const char *frame_regs[16] =
+ { "cfa", "rcx", "rdx", "rbx", "rsp", "rbp","rsi","rdi",
+ "r8","r9","r10","r11","r12","r13","r14","r15" };
+ static const char *int_regs[16] =
+ { "rax", "rcx", "rdx", "rbx", "rsp", "rbp","rsi","rdi",
+ "r8","r9","r10","r11","r12","r13","r14","r15" };
+ static const char *xmm_regs[16] =
+ { "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
+ "xmm8", "xmm9", "xmm10","xmm11","xmm12","xmm13","xmm14","xmm15" };
+ static const char *mm_regs[16] =
+ { "xmm0", "mm1", "mm2", "mm3", "mm4", "mm5", "mm6", "mm7",
+ "xmm8", "mm9", "mm10","mm11","mm12","mm13","mm14","mm15" };
+ const char **p = NULL;
+ char name_end;
+ char *symbol_name = NULL;
+ int i;
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ switch (kind)
+ {
+ case 0:
+ p = frame_regs;
+ break;
+ case 1:
+ p = int_regs;
+ break;
+ case 2:
+ p = mm_regs;
+ break;
+ case 3:
+ p = xmm_regs;
+ break;
+ default:
+ abort ();
+ }
+
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ return 0;
+
+ if (*input_line_pointer == '%')
+ ++input_line_pointer;
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+
+ for (i = 0; i < 16; i++)
+ if (! strcasecmp (p[i], symbol_name))
+ break;
+
+ if (i == 16)
+ as_warn (_("In %s we found the invalid register name %s.\n"),
+ tok, symbol_name);
+
+ *input_line_pointer = name_end;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ if (*input_line_pointer == ',')
+ ++input_line_pointer;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ *regno = i;
+ return i != 16;
+}
+
+static int
+seh_read_offset (const char *tok, bfd_vma *off)
+{
+ bfd_vma r, v = 0, base = 10;
+ int had_one = 0;
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ if (*input_line_pointer == '0')
+ {
+ ++input_line_pointer;
+ had_one = 1;
+ base = 8;
+ switch ((*input_line_pointer))
+ {
+ case 'x':
+ case 'X':
+ base = 16;
+ ++input_line_pointer;
+ break;
+ case 'd':
+ case 'D':
+ base = 10;
+ input_line_pointer++;
+ break;
+ case 'o':
+ case 'O':
+ base = 8;
+ input_line_pointer++;
+ break;
+ }
+ }
+ while (*input_line_pointer != 0)
+ {
+ if (input_line_pointer[0] >= '0' && input_line_pointer[0] <='9')
+ r = (bfd_vma) (input_line_pointer[0] - '0');
+ else if (base == 16 && input_line_pointer[0] >= 'a' && input_line_pointer[0] <='f')
+ r = (bfd_vma) ((input_line_pointer[0] - 'a') + 10);
+ else if (base == 16 && input_line_pointer[0] >= 'A' && input_line_pointer[0] <='F')
+ r = (bfd_vma) ((input_line_pointer[0] - 'A') + 10);
+ else
+ break;
+ input_line_pointer++;
+ v *= base;
+ v += r;
+ had_one = 1;
+ }
+ *off = v;
+ if (had_one == 0)
+ {
+ as_warn (_("In %s we expect a number.\n"),
+ tok);
+ }
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ if (*input_line_pointer == ',')
+ ++input_line_pointer;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
+ input_line_pointer++;
+ return had_one != 0;
+}
+
+static void
+obj_coff_seh_32 (int what)
+{
+ if (seh_ctx_cur == NULL)
+ {
+ as_fatal (_(".seh_eh requires to be in .seh_proc/.seh_endproc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ seh_ctx_cur->use_instruction_32 = (what ? 1 : 0);
+ if (seh_get_target_kind () == seh_kind_arm)
+ as_warn (_(".seh_%s32 is ignored for this target."), (what ? "" : "no"));
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_eh (int what ATTRIBUTE_UNUSED)
+{
+ if (seh_ctx_cur == NULL)
+ {
+ as_fatal (_(".seh_eh requires to be in .seh_proc/.seh_endproc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (seh_get_target_kind () == seh_kind_arm)
+ {
+ seh_ctx_cur->handler_written = 1;
+ /* write block to .text if exception handler is set. */
+ seh_write_text_eh_data (seh_ctx_cur->handler_name, seh_ctx_cur->handler_data_name);
+ }
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_handler (int what ATTRIBUTE_UNUSED)
+{
+ char *symbol_name;
+ char name_end;
+
+ if (seh_ctx_cur == NULL)
+ {
+ as_fatal (_(".seh_handler requires to be in .seh_proc/.seh_endproc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_handler requires a handler lable name.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ seh_ctx->handler_name = xstrdup (symbol_name);
+ if (symbol_name[0] == '@')
+ {
+ if (strcasecmp (symbol_name, "@0") != 0 && strcasecmp (symbol_name, "@1") != 0
+ && strcasecmp (symbol_name, "@null") != 0)
+ as_warn (_("Unknown constant value ,%s' for handler."), symbol_name);
+ }
+ *input_line_pointer = name_end;
+ seh_ctx->handler_data_name = NULL;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ symbol_name = input_line_pointer;
+ if (*input_line_pointer != '\n' && *input_line_pointer != 0)
+ {
+ name_end = get_symbol_end ();
+ seh_ctx->handler_data_name = xstrdup (symbol_name);
+ if (symbol_name[0] == '@')
+ {
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_fatal (_("For this target .seh_handler doesn't support constant user-data."));
+ else if (strcasecmp (symbol_name, "@unwind") != 0 &&
+ strcasecmp (symbol_name, "@except") != 0)
+ as_warn (_("For .seh_handler the constant ,%s' is ignored."), symbol_name);
+ }
+ *input_line_pointer = name_end;
+ }
+ if (seh_ctx_cur->handler_written)
+ as_warn (_(".seh_handler is ignored as .seh_eh was seen before."));
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_scope (int what ATTRIBUTE_UNUSED)
+{
+ char *symbol_name,*beg = NULL,*end = NULL, *handl = NULL, *jmp = NULL;
+ char name_end;
+
+ if (seh_ctx_cur == NULL)
+ {
+ as_fatal (_(".seh_scope requires to be in .seh_proc/.seh_endproc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_scope requires four symbol names.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ beg = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_scope requires three more symbol names.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ end = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_scope requires two more symbol names.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ handl = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+ if (*handl == '@')
+ {
+ if (strcasecmp (handl, "@0") != 0 && strcasecmp (handl, "@1") != 0
+ && strcasecmp (handl, "@null") != 0)
+ as_warn (_("Unknown constant for handler ,%s'."), handl);
+ }
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_scope requires one more symbol names.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ jmp = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+ if (*jmp == '@')
+ {
+ if (strcasecmp (jmp, "@0") != 0 && strcasecmp (handl, "@null") != 0)
+ as_warn (_("Unknown constant for jump ,%s'."), jmp);
+ }
+
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_warn (_(".seh_scope is ignored for this target."));
+ else
+ seh_x64_makescope_elem (seh_ctx_cur, beg, end, handl, jmp);
+ if (beg)
+ free (beg);
+ if (end)
+ free (end);
+ if (handl)
+ free (handl);
+ if (jmp)
+ free (jmp);
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_proc (int what ATTRIBUTE_UNUSED)
+{
+ char *symbol_name;
+ char name_end;
+
+ if (seh_ctx_cur != NULL)
+ {
+ as_warn (_(".seh_proc has to be closed by .seh_endprog\n"));
+ obj_coff_seh_endproc (0);
+ }
+
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_fatal (_(".seh_proc requires function lable name.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+
+ if (seh_ctx == NULL)
+ seh_ctx_root = seh_ctx = (seh_context *) xmalloc (sizeof (seh_context));
+ else
+ {
+ seh_ctx->next = (seh_context *) xmalloc (sizeof (seh_context));
+ seh_ctx = seh_ctx->next;
+ }
+ seh_ctx_cur = seh_ctx;
+ memset (seh_ctx, 0, sizeof (seh_context));
+
+ seh_ctx->func_name = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+ while (*input_line_pointer == ' ' || *input_line_pointer == '\t' || *input_line_pointer == ',')
+ input_line_pointer++;
+ seh_ctx->start_symbol = make_seh_text_label (seh_ctx_cur, &(seh_ctx_cur->start_addr));
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_endproc (int what ATTRIBUTE_UNUSED)
+{
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_endprog without prior .seh_proc (ignored)\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ seh_ctx->end_symbol = make_seh_text_label (seh_ctx, &(seh_ctx->end_addr));
+ seh_ctx->xdata_first = seh_make_xlbl_name (seh_ctx);
+ make_function_entry_pdata (seh_ctx);
+ seh_ctx_cur = NULL;
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_push (int what)
+{
+ int reg = 0;
+ int kind = -1;
+
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_push used outside of .seh_proc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ /* What 0:reg, 1:pushframe. */
+ switch (what)
+ {
+ case 0:
+ if (seh_x64_read_reg (".seh_push", 1, ®))
+ kind = UWOP_PUSH_NONVOL;
+ else
+ as_warn (_(".seh_pushreg expects register argument."));
+ break;
+ case 1:
+ kind = UWOP_PUSH_MACHFRAME;
+ break;
+ default:
+ abort ();
+ }
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_warn (_(".seh_save... is ignored for this target.\n"));
+ else if (kind != -1)
+ seh_x64_make_prologue_element (kind, reg, 0);
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_save (int what)
+{
+ int reg;
+ bfd_vma off;
+ int kind;
+ int ok = 1;
+
+ /* what 0:reg, 1:mm, 2:xmm. */
+ switch (what)
+ {
+ case 0:
+ ok &= seh_x64_read_reg (".seh_savereg", 1, ®);
+ kind = UWOP_SAVE_NONVOL;
+ break;
+ case 1:
+ ok &= seh_x64_read_reg (".seh_savemm", 2, ®);
+ kind = UWOP_SAVE_XMM;
+ break;
+ case 2:
+ ok &= seh_x64_read_reg (".seh_savexmm", 3, ®);
+ kind = UWOP_SAVE_XMM128;
+ break;
+ default:
+ abort ();
+ }
+ ok &= seh_read_offset (".seh_save", &off);
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_save used outside of .seh_proc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_warn (_(".seh_save... is ignored for this target.\n"));
+ else
+ seh_x64_make_prologue_element (kind, reg, off);
+ demand_empty_rest_of_line ();
+}
+
+static void
+obj_coff_seh_endprologue (int what ATTRIBUTE_UNUSED)
+{
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_endprologue used outside of .seh_proc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (seh_ctx_cur->endprologue_symbol != NULL)
+ as_warn (_(".seh_endprologue used more then once in .seh_proc block.\n"));
+ else
+ seh_ctx_cur->endprologue_symbol = make_seh_text_label (seh_ctx_cur, &seh_ctx_cur->endprologue_addr);
+}
+
+static void
+obj_coff_seh_stack_alloc (int what ATTRIBUTE_UNUSED)
+{
+ bfd_vma size;
+
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_stackalloc used outside of .seh_proc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (seh_read_offset (".seh_stackalloc", &size))
+ {
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_warn (_(".seh_stackalloc is ignored for this target.\n"));
+ else
+ seh_x64_make_prologue_element (UWOP_ALLOC_LARGE, 0, size);
+ }
+}
+
+static void
+obj_coff_seh_setframe (int what ATTRIBUTE_UNUSED)
+{
+ int reg;
+ int ok = 1;
+ bfd_vma off;
+
+ ok &= seh_x64_read_reg (".seh_setframe", 0, ®);
+ ok &= seh_read_offset (".seh_setframe", &off);
+ if (seh_ctx_cur == NULL)
+ {
+ as_warn (_(".seh_setframe used outside of .seh_proc block.\n"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+ if (ok)
+ {
+ seh_ctx_cur->framereg = reg;
+ seh_ctx_cur->frameoff = off;
+ }
+ if (seh_get_target_kind () != seh_kind_x64)
+ as_warn (_(".seh_setframe is ignored for this target.\n"));
+ demand_empty_rest_of_line ();
+}
+
+/* Misc function helpers. */
+static void
+seh_reloc (bfd *abfd, bfd_size_type address, int which_howto, int symidx)
+{
+ if (relcount >= relsize - 1)
+ {
+ relsize += 10;
+ if (reltab)
+ reltab = xrealloc (reltab, relsize * sizeof (arelent));
+ else
+ reltab = xmalloc (relsize * sizeof (arelent));
+ }
+ reltab[relcount].address = address;
+ reltab[relcount].addend = 0;
+ reltab[relcount].howto = bfd_reloc_type_lookup (abfd, which_howto);
+ reltab[relcount].sym_ptr_ptr = symtab + symidx;
+ relcount++;
+}
+
+static void
+save_relocs (asection *sec)
+{
+ int i;
+
+ sec->relocation = reltab;
+ sec->reloc_count = relcount;
+ sec->orelocation = xmalloc ((relcount + 1) * sizeof (arelent *));
+ for (i = 0; i < relcount; i++)
+ sec->orelocation[i] = sec->relocation + i;
+ sec->orelocation[relcount] = 0;
+ sec->flags |= SEC_RELOC;
+ reltab = 0;
+ relcount = relsize = 0;
+}
+
+static void
+seh_symbol_init (bfd *abfd, unsigned int added)
+{
+ unsigned int oldcount;
+
+ oldcount = bfd_get_symcount (abfd);
+ symptr = oldcount;
+ symtab = xmalloc ((oldcount + added + 6) * sizeof (asymbol *));
+ if (oldcount > 0)
+ memcpy (symtab, bfd_get_outsymbols (abfd), sizeof (asymbol *) * oldcount);
+}
+
+static int
+seh_symbol (bfd *abfd, const char *n1, const char *n2, const char *n3,
+ asection *sec, int flags, int addr)
+{
+ asymbol *sym;
+ char *name = xmalloc (strlen (n1) + strlen (n2) + strlen (n3) + 1);
+ int ret = symptr;
+
+ strcpy (name, n1);
+ strcat (name, n2);
+ strcat (name, n3);
+ sym = bfd_make_empty_symbol (abfd);
+ sym->name = name;
+ sym->section = sec;
+ sym->flags = flags;
+ sym->value = addr;
+ symtab[symptr++] = sym;
+ return ret;
+}
+
+static asection *
+quick_section (bfd *abfd, const char *name, int flags, int align)
+{
+ asection *sec;
+ asymbol *sym;
+
+ sec = seh_make_section2 (name, flags);
+ bfd_set_section_alignment (abfd, sec, align);
+ /* Remember to undo this before trying to link internally! */
+
+ sym = bfd_make_empty_symbol (abfd);
+ symtab[symptr++] = sym;
+ sym->name = sec->name;
+ sym->section = sec;
+ sym->flags = BSF_LOCAL;
+ sym->value = 0;
+
+ return sec;
+}
+
+static seh_kind
+seh_get_target_kind (void)
+{
+ if (!stdoutput)
+ return seh_kind_unknown;
+ switch (bfd_get_arch (stdoutput))
+ {
+ case bfd_arch_arm:
+ case bfd_arch_powerpc:
+ case bfd_arch_sh:
+ return seh_kind_arm;
+ case bfd_arch_i386:
+ switch (bfd_get_mach (stdoutput))
+ {
+ case bfd_mach_x86_64:
+ case bfd_mach_x86_64_intel_syntax:
+ return seh_kind_x64;
+ default:
+ break;
+ }
+ /* FALL THROUGH. */
+ case bfd_arch_mips:
+ return seh_kind_mips;
+ case bfd_arch_ia64:
+ /* Should return seh_kind_x64. But not implemented yet. */
+ return seh_kind_unknown;
+ default:
+ break;
+ }
+ return seh_kind_unknown;
+}
+
+static void
+seh_emit_rva (const char *name)
+{
+ char *p = (char *) xmalloc (strlen (name) + 1);
+ char *s = input_line_pointer;
+
+ strcpy (p, name);
+ input_line_pointer = p;
+ s_rva (4);
+ input_line_pointer = s;
+}
+
+static void
+seh_emit_long (const char *name)
+{
+ char *p = (char *) xmalloc (strlen (name) + 1);
+ char *s = input_line_pointer;
+
+ strcpy (p, name);
+ input_line_pointer = p;
+ cons (4);
+ input_line_pointer = s;
+}
+
+static void
+seh_make_globl (char *sym_name)
+{
+ char *s = input_line_pointer;
+
+ input_line_pointer = sym_name;
+ s_globl (4);
+ input_line_pointer = s;
+}
+
+static segT
+seh_make_section2 (const char *section_name, unsigned flags)
+{
+ char *name;
+ segT sec;
+
+ name = xmalloc (strlen (section_name) + 1);
+ strcpy (name, section_name);
+
+ sec = subseg_new (name, (subsegT) 0);
+ bfd_set_section_flags (stdoutput, sec,
+ ((SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA | flags)
+ & bfd_applicable_section_flags (stdoutput)));
+
+ return sec;
+}
+
+static segT
+seh_make_section (void)
+{
+ static segT seg_pdata = NULL;
+ segT sec = NULL;
+
+ if (!seg_pdata)
+ seg_pdata = seh_make_section2 (".pdata", 0);
+ sec = seg_pdata;
+ return sec;
+}
+
+static char *
+seh_make_xlbl_name (seh_context *c)
+{
+ size_t len = strlen (".seh_xlbl_") + strlen (c->func_name) + 9 + 1;
+ char *ret = (char*) xmalloc (len);
+
+ if (!ret)
+ as_fatal (_("Out of memory for xdata lable for %s"), c->func_name);
+ else
+ sprintf (ret, ".seh_xlbl_%s_%x", c->func_name, + c->xlbl_count);
+ c->xlbl_count += 1;
+ return ret;
+}
+
+static char *
+make_seh_text_label (seh_context *c, symbolS **addr)
+{
+ char *sym_name;
+ size_t len = strlen (".seh_tlbl_") + strlen (c->func_name) + 9 + 1;
+
+ sym_name = (char *) xmalloc (len);
+ if (!sym_name)
+ as_fatal (_("Allocating memory for SEH's text symbol for %s failed"), c->func_name);
+ sprintf (sym_name, ".seh_tlbl_%s_%x", c->func_name, c->tlbl_count);
+ c->tlbl_count += 1;
+ if (addr)
+ {
+ seh_make_globl (sym_name);
+ *addr = colon (sym_name);
+ }
+ return sym_name;
+}
+
+/* x64 secific functions. */
+
+static void
+seh_fill_pcsyms (const seh_context *c, char **names, int *idx)
+{
+ size_t i;
+ int count = 1;
+ valueT start_off = resolve_symbol_value (c->start_addr);
+ valueT un_off;
+ seh_prologue_element *e = c->elems;
+
+ names[0] = c->start_symbol;
+ idx[0] = 0;
+ if (c->elems_count == 0)
+ return;
+ for (i = 0; i < c->elems_count; i++)
+ {
+ un_off = resolve_symbol_value (e[i].pc_addr);
+ if ((un_off - start_off) > 255)
+ {
+ names[count] = e[i].pc_symbol;
+ idx[count] = (int) i;
+ count++;
+ start_off = un_off;
+ }
+ }
+}
+
+static int
+seh_needed_unwind_info (seh_context *c)
+{
+ size_t i;
+ int count = 1;
+ valueT start_off = resolve_symbol_value (c->start_addr);
+ valueT un_off;
+ seh_prologue_element *e = c->elems;
+
+ if (c->elems_count == 0)
+ return count;
+ for (i = 0; i < c->elems_count; i++)
+ {
+ un_off = resolve_symbol_value (e[i].pc_addr);
+ if ((un_off - start_off) > 255)
+ {
+ count++;
+ start_off = un_off;
+ }
+ }
+ return count;
+}
+
+static size_t
+seh_getelm_data_size (const seh_context *c, int elm_start, int elm_end)
+{
+ size_t ret = PEX64_UWI_SIZEOF_UWCODE_ARRAY (elm_end - elm_start);
+
+ while (elm_start < elm_end)
+ {
+ switch (c->elems[elm_start].kind)
+ {
+ case UWOP_PUSH_NONVOL:
+ case UWOP_PUSH_MACHFRAME:
+ ret += 2;
+ break;
+ case UWOP_SAVE_NONVOL:
+ case UWOP_SAVE_XMM:
+ case UWOP_SAVE_XMM128:
+ if ((c->elems[elm_start].offset & 7) != 0 ||
+ ((c->elems[elm_start].offset / 8) > 0xffff))
+ ret += 6;
+ else
+ ret += 4;
+ break;
+ case UWOP_ALLOC_LARGE:
+ ret += 4;
+ break;
+ default:
+ break;
+ }
+ elm_start++;
+ }
+ return ret;
+}
+
+static size_t
+seh_getsize_of_unwind_entry (seh_context *c, int elm_start, int elm_end, int bechain)
+{
+ size_t ret = seh_getelm_data_size(c, elm_start, elm_end);
+
+ c->count_syms += 1;
+ if (bechain)
+ {
+ ret += 4 + 4;
+ c->count_syms += 1;
+ c->count_reloc += 1;
+ }
+ else
+ {
+ ret += 4;
+ if (c->handler_name != NULL)
+ {
+ if (c->handler_data_name != NULL
+ && c->handler_data_name[0] != '@')
+ {
+ ret += 4;
+ c->count_syms += 2;
+ c->count_reloc += 2;
+ }
+ else
+ {
+ ret += 8 + (c->scope_count * 4) * 4;
+ c->count_syms += (c->scope_count * 4) + 1;
+ c->count_reloc += (c->scope_count * 4) + 1;
+ }
+ }
+ }
+ return ret;
+}
+
+static void
+seh_make_unwind_entry (const seh_context *c, char *name, int elm_start, int elm_end, int bechain,
+ unsigned char *data, size_t *poffs, int no)
+{
+ size_t off = *poffs;
+ size_t it;
+ valueT start_off = resolve_symbol_value (c->start_addr);
+ valueT end_prologue;
+ size_t uwcodes = seh_getelm_data_size(c, elm_start, elm_end);
+ unsigned int flag = UNW_FLAG_NHANDLER;
+ int idx;
+
+ if (c->handler_name != NULL)
+ {
+ flag = UNW_FLAG_EHANDLER;
+ if (c->handler_data_name != NULL && c->handler_data_name[0] != '@')
+ flag = UNW_FLAG_FHANDLER;
+ else if (c->handler_data_name != NULL &&
+ strcasecmp (c->handler_data_name, "@unwind") == 0)
+ flag = UNW_FLAG_UHANDLER;
+ }
+ if (!c->endprologue_addr)
+ end_prologue = start_off;
+ else
+ end_prologue = resolve_symbol_value (c->endprologue_addr);
+ seh_symbol (c->abfd, name, "", "", c->section, BSF_GLOBAL, (int) off);
+ data[off++] = (1 | ((bechain ? UNW_FLAG_CHAININFO : flag) << 3));
+ if (elm_start != 0)
+ start_off = (valueT) c->elems[elm_start].offset;
+ end_prologue -= start_off;
+ if (end_prologue > 255)
+ end_prologue = 255;
+ data[off++] = (unsigned char) end_prologue;
+ data[off++] = (unsigned char) (uwcodes / 2);
+ data[off] = (unsigned char) c->framereg;
+ data[off++] |= (unsigned char) ((c->frameoff / 16) << 4);
+ off += uwcodes;
+ if (bechain)
+ {
+ char n[100];
+
+ sprintf (n,"%x", no);
+ idx = seh_symbol (c->abfd, ".xdata_fct", c->func_name, n, UNDSEC, BSF_GLOBAL, (int) off);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ off += 4;
+ }
+ else if (c->handler_name != NULL)
+ {
+ if (flag == UNW_FLAG_FHANDLER)
+ {
+ if (strcasecmp (c->handler_name, "@1") == 0)
+ bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
+ else if (c->handler_name[0] != '@')
+ {
+ idx = seh_symbol (c->abfd, c->handler_name, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ }
+ off += 4;
+ idx = seh_symbol (c->abfd, c->handler_data_name, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ off += 4;
+ }
+ else if (flag == UNW_FLAG_UHANDLER || flag == UNW_FLAG_EHANDLER)
+ {
+ if (strcasecmp (c->handler_name, "@1") == 0)
+ bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
+ else if (c->handler_name[0] != '@')
+ {
+ idx = seh_symbol (c->abfd, c->handler_name, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ }
+ off += 4;
+ bfd_put_32 (c->abfd, (bfd_vma) c->scope_count, &data[off]);
+ off += 4;
+ for (it = 0; it < c->scope_count; it++)
+ {
+ idx = seh_symbol (c->abfd, c->scopes[it].begin_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ off += 4;
+ idx = seh_symbol (c->abfd, c->scopes[it].end_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ off += 4;
+ if (c->scopes[it].handler_addr[0] == '@')
+ {
+ if (strcasecmp (c->scopes[it].handler_addr, "@1") == 0)
+ bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
+ }
+ else
+ {
+ idx = seh_symbol (c->abfd, c->scopes[it].handler_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ }
+ off += 4;
+ if (c->scopes[it].jump_addr[0] == '@')
+ {
+ if (strcasecmp (c->scopes[it].jump_addr, "@1") == 0)
+ bfd_put_32 (c->abfd, (bfd_vma) 1, &data[off]);
+ }
+ else
+ {
+ idx = seh_symbol (c->abfd, c->scopes[it].jump_addr, "", "", UNDSEC, BSF_GLOBAL, 0);
+ seh_reloc (c->abfd, off, BFD_RELOC_RVA, idx);
+ }
+ off += 4;
+ }
+ }
+ }
+ *poffs = off;
+}
+
+static size_t
+seh_getsize_unwind_data (seh_context *c)
+{
+ int need = seh_needed_unwind_info (c);
+ int i;
+ char **names = (char **) xmalloc (sizeof (char *) * need);
+ char **pc_syms = (char **) xmalloc (sizeof (char *) * need);
+ int *elm_start = (int *) xmalloc (sizeof (int) * (need + 1));
+ size_t xdata_sz = 0;
+
+ seh_fill_pcsyms (c, pc_syms, elm_start);
+ elm_start[need] = c->elems_count;
+
+ xdata_sz += ((12 * (size_t) need));
+ c->count_syms += 5 * need;
+ xdata_sz += (seh_getsize_of_unwind_entry (c, elm_start[0], elm_start[1], 1 != need) + 7) & ~7;
+ for (i = 1; i < need; i++)
+ xdata_sz += (seh_getsize_of_unwind_entry (c, elm_start[i], elm_start[i + 1], 1 != need) + 7) & ~7;
+
+ /* Create lable names for .xdata unwind info. */
+ names[0] = c->xdata_first;
+ for (i = 1; i < need; i++)
+ names[i] = seh_make_xlbl_name (c);
+ c->xdata_names = names;
+ c->xdata_pcsyms = pc_syms;
+ c->xdata_elm_start = elm_start;
+ c->xdata_sz = xdata_sz;
+ return xdata_sz;
+}
+
+static void
+seh_create_unwind_data (seh_context *c, unsigned char *data, size_t offs)
+{
+ int need = seh_needed_unwind_info (c);
+ int i;
+ char **names = c->xdata_names;
+ char **pc_syms = c->xdata_pcsyms;
+ int *elm_start = c->xdata_elm_start;
+
+ for (i = 1; i < need; i++)
+ seh_make_function_entry_xdata (c, pc_syms[i], c->end_symbol, names[i], data, &offs, i);
+
+ /* Generate the function entry. Remark, that just
+ first is in .pdata section and already emitted. */
+ seh_make_unwind_entry (c, c->xdata_first, elm_start[0], elm_start[1], 1 != need, data, &offs, 1);
+ for (i = 1; i < need; i++)
+ seh_make_unwind_entry (c, names[i], elm_start[i], elm_start[i + 1], (i + 1) != need, data, &offs, i + 1);
+
+ for (i = 1; i < need; i++)
+ free (names[i]);
+ free (names);
+ free (pc_syms);
+ free (elm_start);
+ c->xdata_names = NULL;
+ c->xdata_pcsyms = NULL;
+ c->xdata_elm_start = NULL;
+}
+
+static void
+seh_make_function_entry_xdata (seh_context *c, char *pc_start, char *pc_end, char *pc_xdata, unsigned char *data, size_t *poffs,int no)
+{
+ bfd_vma addr = (bfd_vma) *poffs;
+ int idx;
+ char s[100];
+
+ if (!data)
+ return;
+ sprintf (s,"%x",no);
+ seh_symbol (c->abfd, ".xdata_fct",c->func_name, s, c->section, BSF_GLOBAL, (int) poffs[0]);
+ idx = seh_symbol (c->abfd, pc_start,"","", UNDSEC, BSF_GLOBAL,0);
+ seh_reloc (c->abfd, addr, BFD_RELOC_RVA, idx);
+ idx = seh_symbol (c->abfd, pc_end,"","", UNDSEC, BSF_GLOBAL,0);
+ seh_reloc (c->abfd, addr + 4, BFD_RELOC_RVA, idx);
+ idx = seh_symbol (c->abfd, pc_xdata,"","", UNDSEC, BSF_GLOBAL,0);
+ seh_reloc (c->abfd, addr + 8, BFD_RELOC_RVA, idx);
+ poffs[0] += 12;
+}
+
+static seh_scope_elem *
+seh_x64_makescope_elem (seh_context *c, const char *begin, const char *end,
+ const char *handler, const char *jmp)
+{
+ seh_scope_elem *r;
+
+ if (!end || !begin)
+ return NULL;
+ if (c->scope_count >= c->scope_max)
+ {
+ seh_scope_elem *h = (seh_scope_elem *) xmalloc (sizeof (seh_scope_elem) * (c->scope_max + 8));
+ memset (h, 0, sizeof (seh_scope_elem) * (c->scope_max + 8));
+ if (c->scopes != NULL)
+ memcpy (h, c->scopes, sizeof (seh_scope_elem) * c->scope_max);
+ if (c->scopes != NULL)
+ free (c->scopes);
+ c->scopes = h;
+ c->scope_max += 8;
+ }
+ r = &c->scopes[c->scope_count++];
+ r->begin_addr = xstrdup (begin);
+ r->end_addr = xstrdup (end);
+ r->handler_addr = (!handler ? NULL : xstrdup (handler));
+ r->jump_addr = (!jmp ? NULL : xstrdup (jmp));
+ return r;
+}
projects / msp430-binutils.git / blobdiff