/* seh pdata/xdata coff object file format
- Copyright 2009
+ Copyright 2009, 2010
Free Software Foundation, Inc.
This file is part of GAS.
#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, size_t *);
-static void seh_store_elm_data (const seh_context *, int, int, unsigned char *, valueT base_off);
-
-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 segT xdata_seg;
+static segT pdata_seg;
+static int xdata_subseg;
+
+static void write_function_xdata (seh_context *);
+static void write_function_pdata (seh_context *);
+\f
static void
-seh_write_text_eh_data (const char *hnd, const char *hnd_data)
+switch_xdata (int subseg)
{
- 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);
+ if (xdata_seg == NULL)
+ {
+ xdata_seg = subseg_new (".xdata", 0);
+ bfd_set_section_flags (stdoutput, xdata_seg,
+ ((SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA)
+ & bfd_applicable_section_flags (stdoutput)));
+ }
+ subseg_set (xdata_seg, subseg);
}
-/* Generate initial pdata for x64 and mips. */
static void
-make_function_entry_pdata (seh_context *c)
+switch_pdata (void)
{
- segT sec = NULL;
- segT current_seg = now_seg;
- subsegT current_subseg = now_subseg;
+ if (pdata_seg == NULL)
+ {
+ pdata_seg = subseg_new (".pdata", 0);
+ bfd_set_section_flags (stdoutput, pdata_seg,
+ ((SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_DATA)
+ & bfd_applicable_section_flags (stdoutput)));
+ }
+ else
+ subseg_set (pdata_seg, 0);
+}
+\f
+/* Parsing routines. */
- sec = seh_make_section ();
- switch (seh_get_target_kind ())
+/* Return the style of SEH unwind info to generate. */
+
+static seh_kind
+seh_get_target_kind (void)
+{
+ if (!stdoutput)
+ return seh_kind_unknown;
+ switch (bfd_get_arch (stdoutput))
{
- 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] == '@')
+ 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))
{
- if (strcasecmp (c->handler_name, "@1") == 0)
- seh_emit_long ("1");
- else
- seh_emit_long ("0");
+ case bfd_mach_x86_64:
+ case bfd_mach_x86_64_intel_syntax:
+ return seh_kind_x64;
+ default:
+ break;
}
- 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;
+ /* 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;
}
- subseg_set (current_seg, current_subseg);
+ return seh_kind_unknown;
}
-/* Create and write xdata section. */
-static void
-seh_x64_write_xdata (void)
+/* Verify that we're in the context of a seh_proc. */
+
+static int
+verify_context (const char *directive)
{
- 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)
+ if (seh_ctx_cur == NULL)
{
- h->xdata_offset = xdata_size;
- xdata_size += seh_getsize_unwind_data (h);
- count_syms += h->count_syms;
- h = h->next;
+ as_bad (_("%s used outside of .seh_proc block"), directive);
+ ignore_rest_of_line ();
+ return 0;
}
+ return 1;
+}
- if (xdata_size == 0)
- return;
+/* Similar, except we also verify the appropriate target. */
- 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)
+static int
+verify_context_and_target (const char *directive, seh_kind target)
+{
+ if (seh_get_target_kind () != target)
{
- 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;
+ as_warn (_("%s ignored for this target"), directive);
+ ignore_rest_of_line ();
+ return 0;
+ }
+ return verify_context (directive);
+}
+
+/* Skip whitespace and a comma. Error if the comma is not seen. */
+
+static int
+skip_whitespace_and_comma (int required)
+{
+ SKIP_WHITESPACE ();
+ if (*input_line_pointer == ',')
+ {
+ input_line_pointer++;
+ SKIP_WHITESPACE ();
+ return 1;
}
- save_relocs (seg_xdata);
- bfd_set_symtab (abfd, symtab, symptr);
- bfd_set_section_contents (abfd, seg_xdata, data, 0, xdata_size);
+ else if (required)
+ {
+ as_bad (_("missing separator"));
+ ignore_rest_of_line ();
+ }
+ else
+ demand_empty_rest_of_line ();
+ return 0;
}
-/* Create pdata section data for arm. */
+/* Mark current context to use 32-bit instruction (arm). */
static void
-seh_arm_create_pdata (seh_context *c, unsigned char *data, size_t pdata_offs)
+obj_coff_seh_32 (int what)
{
- int idx;
- unsigned int val;
- valueT func_len = 0;
- valueT prolog_len = 0;
- valueT start_len = 0;
+ if (!verify_context_and_target ((what ? ".seh_32" : ".seh_no32"),
+ seh_kind_arm))
+ return;
- 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)
+ seh_ctx_cur->use_instruction_32 = (what ? 1 : 0);
+ demand_empty_rest_of_line ();
+}
+
+/* Set for current context the handler and optional data (arm). */
+
+static void
+obj_coff_seh_eh (int what ATTRIBUTE_UNUSED)
+{
+ if (!verify_context_and_target (".seh_eh", seh_kind_arm))
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);
+
+ /* Write block to .text if exception handler is set. */
+ seh_ctx_cur->handler_written = 1;
+ emit_expr (&seh_ctx_cur->handler, 4);
+ emit_expr (&seh_ctx_cur->handler_data, 4);
+
+ demand_empty_rest_of_line ();
}
-/* Write pdata section for arm. */
+/* Set for current context the default handler (x64). */
+
static void
-seh_arm_write_pdata (void)
+obj_coff_seh_handler (int what ATTRIBUTE_UNUSED)
{
- 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)
+ char *symbol_name;
+ char name_end;
+
+ if (!verify_context (".seh_handler"))
return;
- while (h != NULL)
+
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_bad (_(".seh_handler requires a handler"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer == '@')
{
- h->xdata_offset = pdata_size;
- pdata_size += 8;
- count_syms += 1;
- h = h->next;
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+
+ seh_ctx_cur->handler.X_op = O_constant;
+ seh_ctx_cur->handler.X_add_number = 0;
+
+ if (strcasecmp (symbol_name, "@0") == 0
+ || strcasecmp (symbol_name, "@null") == 0)
+ ;
+ else if (strcasecmp (symbol_name, "@1") == 0)
+ seh_ctx_cur->handler.X_add_number = 1;
+ else
+ as_bad (_("unknown constant value '%s' for handler"), symbol_name);
+
+ *input_line_pointer = name_end;
}
+ else
+ expression (&seh_ctx_cur->handler);
- if (pdata_size == 0)
+ seh_ctx_cur->handler_data.X_op = O_constant;
+ seh_ctx_cur->handler_data.X_add_number = 0;
+ seh_ctx_cur->handler_flags = 0;
+
+ if (!skip_whitespace_and_comma (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)
+ if (seh_get_target_kind () == seh_kind_x64)
{
- pdata_offs = h->xdata_offset;
- h->section = seg_pdata;
- h->abfd = abfd;
- if (h->done != 0)
+ do
{
- seh_arm_create_pdata (h, data, pdata_offs);
- h->done = 1;
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+
+ if (strcasecmp (symbol_name, "@unwind") == 0)
+ seh_ctx_cur->handler_flags |= UNW_FLAG_UHANDLER;
+ else if (strcasecmp (symbol_name, "@except") == 0)
+ seh_ctx_cur->handler_flags |= UNW_FLAG_EHANDLER;
+ else
+ as_bad (_(".seh_handler constant '%s' unknown"), symbol_name);
+
+ *input_line_pointer = name_end;
}
- h = h->next;
+ while (skip_whitespace_and_comma (0));
+ }
+ else
+ {
+ expression (&seh_ctx_cur->handler_data);
+ demand_empty_rest_of_line ();
+
+ if (seh_ctx_cur->handler_written)
+ as_warn (_(".seh_handler after .seh_eh is ignored"));
+ }
+}
+
+/* Switch to subsection for handler data for exception region (x64). */
+
+static void
+obj_coff_seh_handlerdata (int what ATTRIBUTE_UNUSED)
+{
+ if (!verify_context_and_target (".seh_handlerdata", seh_kind_x64))
+ return;
+ demand_empty_rest_of_line ();
+
+ switch_xdata (seh_ctx_cur->subsection + 1);
+}
+
+/* Mark end of current context. */
+
+static void
+do_seh_endproc (void)
+{
+ seh_ctx_cur->end_addr = symbol_temp_new_now ();
+
+ write_function_xdata (seh_ctx_cur);
+ write_function_pdata (seh_ctx_cur);
+ seh_ctx_cur = NULL;
+}
+
+static void
+obj_coff_seh_endproc (int what ATTRIBUTE_UNUSED)
+{
+ demand_empty_rest_of_line ();
+ if (seh_ctx_cur == NULL)
+ {
+ as_bad (_(".seh_endproc used without .seh_proc"));
+ return;
+ }
+
+ do_seh_endproc ();
+}
+
+/* Mark begin of new context. */
+
+static void
+obj_coff_seh_proc (int what ATTRIBUTE_UNUSED)
+{
+ char *symbol_name;
+ char name_end;
+
+ if (seh_ctx_cur != NULL)
+ {
+ as_bad (_("previous SEH entry not closed (missing .seh_endproc)"));
+ do_seh_endproc ();
+ }
+
+ if (*input_line_pointer == 0 || *input_line_pointer == '\n')
+ {
+ as_bad (_(".seh_proc requires function label name"));
+ demand_empty_rest_of_line ();
+ return;
+ }
+
+ seh_ctx_cur = XCNEW (seh_context);
+
+ if (seh_get_target_kind () == seh_kind_x64)
+ {
+ seh_ctx_cur->subsection = xdata_subseg;
+ xdata_subseg += 2;
}
- save_relocs (seg_pdata);
- bfd_set_symtab (abfd, symtab, symptr);
- bfd_set_section_contents (abfd, seg_pdata, data, 0, pdata_size);
+
+ SKIP_WHITESPACE ();
+
+ symbol_name = input_line_pointer;
+ name_end = get_symbol_end ();
+ seh_ctx_cur->func_name = xstrdup (symbol_name);
+ *input_line_pointer = name_end;
+
+ demand_empty_rest_of_line ();
+
+ seh_ctx_cur->start_addr = symbol_temp_new_now ();
}
-/* Do object finalization to generate and write pdata/xdata
- for arm and x64 target. */
+/* Mark end of prologue for current context. */
+
+static void
+obj_coff_seh_endprologue (int what ATTRIBUTE_UNUSED)
+{
+ if (!verify_context (".seh_endprologue"))
+ return;
+ demand_empty_rest_of_line ();
+
+ if (seh_ctx_cur->endprologue_addr != NULL)
+ as_warn (_("duplicate .seh_endprologue in .seh_proc block"));
+ else
+ seh_ctx_cur->endprologue_addr = symbol_temp_new_now ();
+}
+
+/* End-of-file hook. */
+
void
obj_coff_seh_do_final (void)
{
- switch (seh_get_target_kind ())
+ if (seh_ctx_cur != NULL)
{
- case seh_kind_mips:
- default:
- break;
- case seh_kind_arm:
- seh_arm_write_pdata ();
- break;
- case seh_kind_x64:
- seh_x64_write_xdata ();
- break;
+ as_bad (_("open SEH entry at end of file (missing .cfi_endproc)"));
+ do_seh_endproc ();
}
}
-/* Enter a prologue element into current context. */
+/* Enter a prologue element into current context (x64). */
+
static void
-seh_x64_make_prologue_element (int kind, int reg, bfd_vma off)
+seh_x64_make_prologue_element (int code, int info, offsetT off)
{
seh_prologue_element *n;
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;
+ seh_ctx_cur->elems = XRESIZEVEC (seh_prologue_element,
+ seh_ctx_cur->elems,
+ seh_ctx_cur->elems_max);
}
- 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;
+
+ n = &seh_ctx_cur->elems[seh_ctx_cur->elems_count++];
+ n->code = code;
+ n->info = info;
+ n->off = off;
+ n->pc_addr = symbol_temp_new_now ();
}
-/* Helper to read a register name from input stream. */
+/* Helper to read a register name from input stream (x64). */
+
static int
-seh_x64_read_reg (const char *tok, int kind, int *regno)
+seh_x64_read_reg (const char *directive, int kind)
{
- 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] =
+ static const char * const 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] =
+ static const char * const 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;
+
+ const char * const *regs = 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;
+ regs = int_regs;
break;
case 2:
- p = mm_regs;
- break;
- case 3:
- p = xmm_regs;
+ regs = xmm_regs;
break;
default:
abort ();
}
- if (*input_line_pointer == 0 || *input_line_pointer == '\n')
- return 0;
-
+ SKIP_WHITESPACE ();
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))
+ if (! strcasecmp (regs[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;
-}
-/* Read an numeric value from input stream. */
-static int
-seh_read_offset (const char *tok, bfd_vma *off)
-{
- bfd_vma r, v = 0, base = 10;
- int had_one = 0;
- int neg = 0;
- while (*input_line_pointer == ' ' || *input_line_pointer == '\t')
- input_line_pointer++;
- if (*input_line_pointer == '$')
- ++input_line_pointer;
- if (*input_line_pointer == '-')
- {
- neg = 1;
- ++input_line_pointer;
- }
- else if (*input_line_pointer == '+')
- {
- ++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)
+ /* Error if register not found, or EAX used as a frame pointer. */
+ if (i == 16 || (kind == 0 && i == 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;
+ as_bad (_("invalid register for %s"), directive);
+ return -1;
}
- if (neg)
- v = (bfd_vma) (v ^ ((bfd_vma) -1LL)) + (bfd_vma) 1ULL;
- *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;
+ return i;
}
-/* Mark current context to use 32-bit instruction (arm). */
+/* Add a register push-unwind token to the current context. */
+
static void
-obj_coff_seh_32 (int what)
+obj_coff_seh_pushreg (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;
- }
- 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"));
+ int reg;
+
+ if (!verify_context_and_target (".seh_pushreg", seh_kind_x64))
+ return;
+
+ reg = seh_x64_read_reg (".seh_pushreg", 1);
demand_empty_rest_of_line ();
+
+ if (reg < 0)
+ return;
+
+ seh_x64_make_prologue_element (UWOP_PUSH_NONVOL, reg, 0);
}
-/* Set for current context the handler and optional data (arm). */
+/* Add a register frame-unwind token to the current context. */
+
static void
-obj_coff_seh_eh (int what ATTRIBUTE_UNUSED)
+obj_coff_seh_pushframe (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);
- }
+ if (!verify_context_and_target (".seh_pushframe", seh_kind_x64))
+ return;
demand_empty_rest_of_line ();
-}
-
-/* Set for current context the default handler (x64). */
-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 ();
+ seh_x64_make_prologue_element (UWOP_PUSH_MACHFRAME, 0, 0);
}
-/* Add a scope-element for exception region (x64). */
+/* Add a register save-unwind token to current context. */
+
static void
-obj_coff_seh_scope (int what ATTRIBUTE_UNUSED)
+obj_coff_seh_save (int what)
{
- char *symbol_name,*beg = NULL,*end = NULL, *handl = NULL, *jmp = NULL;
- char name_end;
+ const char *directive = (what == 1 ? ".seh_savereg" : ".seh_savexmm");
+ int code, reg, scale;
+ offsetT off;
- 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;
- }
+ if (!verify_context_and_target (directive, seh_kind_x64))
+ 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);
- }
+ reg = seh_x64_read_reg (directive, what);
- 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 (!skip_whitespace_and_comma (1))
+ return;
- 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);
+ off = get_absolute_expression ();
demand_empty_rest_of_line ();
-}
-
-/* Mark begin of new context. */
-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')
+ if (reg < 0)
+ return;
+ if (off < 0)
{
- as_fatal (_(".seh_proc requires function lable name.\n"));
- demand_empty_rest_of_line ();
+ as_bad (_("%s offset is negative"), directive);
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 ();
+ scale = (what == 1 ? 8 : 16);
- if (seh_ctx == NULL)
- seh_ctx_root = seh_ctx = (seh_context *) xmalloc (sizeof (seh_context));
- else
+ if ((off & (scale - 1)) == 0 && off <= 0xffff * scale)
{
- seh_ctx->next = (seh_context *) xmalloc (sizeof (seh_context));
- seh_ctx = seh_ctx->next;
+ code = (what == 1 ? UWOP_SAVE_NONVOL : UWOP_SAVE_XMM128);
+ off /= scale;
}
- 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 ();
-}
-
-/* Mark end of current context. */
-static void
-obj_coff_seh_endproc (int what ATTRIBUTE_UNUSED)
-{
- if (seh_ctx_cur == NULL)
+ else if (off < 0xffffffff)
+ code = (what == 1 ? UWOP_SAVE_NONVOL_FAR : UWOP_SAVE_XMM128_FAR);
+ else
{
- as_warn (_(".seh_endprog without prior .seh_proc (ignored)\n"));
- demand_empty_rest_of_line ();
+ as_bad (_("%s offset out of range"), directive);
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 ();
+
+ seh_x64_make_prologue_element (code, reg, off);
}
-/* Add a push-unwind-information to current context.
- what:0 push volatile reg, 1: push machine frame, 2: set fp register. */
+/* Add a stack-allocation token to current context. */
+
static void
-obj_coff_seh_push (int what)
+obj_coff_seh_stackalloc (int what ATTRIBUTE_UNUSED)
{
- int reg = 0;
- int kind = -1;
- bfd_vma off = 0;
+ offsetT off;
+ int code, info;
- 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_pushreg", 1, ®))
- kind = UWOP_PUSH_NONVOL;
- else
- as_warn (_(".seh_pushreg expects register argument."));
- break;
- case 1:
- kind = UWOP_PUSH_MACHFRAME;
- break;
- default:
- abort ();
- }
+ if (!verify_context_and_target (".seh_stackalloc", seh_kind_x64))
+ return;
- 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, off);
+ off = get_absolute_expression ();
demand_empty_rest_of_line ();
-}
-/* Add a register save-unwind-information to current context. */
-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)
+ if (off == 0)
+ return;
+ if (off < 0)
{
- as_warn (_(".seh_save used outside of .seh_proc block.\n"));
- demand_empty_rest_of_line ();
+ as_bad (_(".seh_stackalloc offset is negative"));
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 ();
-}
-/* Mark end of prologue for current context. */
-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"));
+ if ((off & 7) == 0 && off <= 128)
+ code = UWOP_ALLOC_SMALL, info = (off - 8) >> 3, off = 0;
+ else if ((off & 7) == 0 && off <= 0xffff * 8)
+ code = UWOP_ALLOC_LARGE, info = 0, off >>= 3;
+ else if (off <= 0xffffffff)
+ code = UWOP_ALLOC_LARGE, info = 1;
else
- seh_ctx_cur->endprologue_symbol = make_seh_text_label (seh_ctx_cur, &seh_ctx_cur->endprologue_addr);
-}
-
-/* Add a stack-allocation-unwind-information for current context. */
-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 ();
+ as_bad (_(".seh_stackalloc offset out of range"));
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);
- }
+
+ seh_x64_make_prologue_element (code, info, off);
}
-/* Add frame-pointer-unwind-information to current context. */
+/* Add a frame-pointer token to current context. */
+
static void
obj_coff_seh_setframe (int what ATTRIBUTE_UNUSED)
{
- int kind = -1;
+ offsetT off;
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)
+ if (!verify_context_and_target (".seh_setframe", seh_kind_x64))
+ return;
+
+ reg = seh_x64_read_reg (".seh_setframe", 0);
+
+ if (!skip_whitespace_and_comma (1))
+ return;
+
+ off = get_absolute_expression ();
+ demand_empty_rest_of_line ();
+
+ if (reg < 0)
+ return;
+ if (off < 0)
+ as_bad (_(".seh_setframe offset is negative"));
+ else if (off > 240)
+ as_bad (_(".seh_setframe offset out of range"));
+ else if (off & 15)
+ as_bad (_(".seh_setframe offset not a multiple of 16"));
+ else if (seh_ctx_cur->framereg != 0)
+ as_bad (_("duplicate .seh_setframe in current .seh_proc"));
+ else
{
seh_ctx_cur->framereg = reg;
seh_ctx_cur->frameoff = off;
- kind = UWOP_SET_FPREG;
+ seh_x64_make_prologue_element (UWOP_SET_FPREG, 0, 0);
}
- if (seh_get_target_kind () != seh_kind_x64)
- as_warn (_(".seh_setframe is ignored for this target.\n"));
- else if (kind != -1)
- seh_x64_make_prologue_element (kind, reg, off);
- demand_empty_rest_of_line ();
}
+\f
+/* Data writing routines. */
-/* 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++;
-}
+/* Output raw integers in 1, 2, or 4 bytes. */
-static void
-save_relocs (asection *sec)
+static inline void
+out_one (int byte)
{
- 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;
+ FRAG_APPEND_1_CHAR (byte);
}
-static void
-seh_symbol_init (bfd *abfd, unsigned int added)
+static inline void
+out_two (int data)
{
- 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);
+ md_number_to_chars (frag_more (2), data, 2);
}
-static int
-seh_symbol (bfd *abfd, const char *n1, const char *n2, const char *n3,
- asection *sec, int flags, int addr)
+static inline void
+out_four (int data)
{
- 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;
+ md_number_to_chars (frag_more (4), data, 4);
}
-static asection *
-quick_section (bfd *abfd, const char *name, int flags, int align)
+/* Write out prologue data for x64. */
+
+static void
+seh_x64_write_prologue_data (const seh_context *c)
{
- asection *sec;
- asymbol *sym;
+ int i;
- sec = seh_make_section2 (name, flags);
- bfd_set_section_alignment (abfd, sec, align);
- /* Remember to undo this before trying to link internally! */
+ /* We have to store in reverse order. */
+ for (i = c->elems_count - 1; i >= 0; --i)
+ {
+ const seh_prologue_element *e = c->elems + i;
+ expressionS exp;
- sym = bfd_make_empty_symbol (abfd);
- symtab[symptr++] = sym;
- sym->name = sec->name;
- sym->section = sec;
- sym->flags = BSF_LOCAL;
- sym->value = 0;
+ /* First comes byte offset in code. */
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = e->pc_addr;
+ exp.X_op_symbol = c->start_addr;
+ exp.X_add_number = 0;
+ emit_expr (&exp, 1);
- return sec;
-}
+ /* Second comes code+info packed into a byte. */
+ out_one ((e->info << 4) | e->code);
-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))
+ switch (e->code)
{
- case bfd_mach_x86_64:
- case bfd_mach_x86_64_intel_syntax:
- return seh_kind_x64;
- default:
+ case UWOP_PUSH_NONVOL:
+ case UWOP_ALLOC_SMALL:
+ case UWOP_SET_FPREG:
+ case UWOP_PUSH_MACHFRAME:
+ /* These have no extra data. */
break;
+
+ case UWOP_ALLOC_LARGE:
+ if (e->info)
+ {
+ case UWOP_SAVE_NONVOL_FAR:
+ case UWOP_SAVE_XMM128_FAR:
+ /* An unscaled 4 byte offset. */
+ out_four (e->off);
+ break;
+ }
+ /* FALLTHRU */
+
+ case UWOP_SAVE_NONVOL:
+ case UWOP_SAVE_XMM128:
+ /* A scaled 2 byte offset. */
+ out_two (e->off);
+ break;
+
+ default:
+ abort ();
}
- /* 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;
+static int
+seh_x64_size_prologue_data (const seh_context *c)
+{
+ int i, ret = 0;
+
+ for (i = c->elems_count - 1; i >= 0; --i)
+ switch (c->elems[i].code)
+ {
+ case UWOP_PUSH_NONVOL:
+ case UWOP_ALLOC_SMALL:
+ case UWOP_SET_FPREG:
+ case UWOP_PUSH_MACHFRAME:
+ ret += 1;
+ break;
- strcpy (p, name);
- input_line_pointer = p;
- s_rva (4);
- input_line_pointer = s;
-}
+ case UWOP_SAVE_NONVOL:
+ case UWOP_SAVE_XMM128:
+ ret += 2;
+ break;
-static void
-seh_emit_long (const char *name)
-{
- char *p = (char *) xmalloc (strlen (name) + 1);
- char *s = input_line_pointer;
+ case UWOP_SAVE_NONVOL_FAR:
+ case UWOP_SAVE_XMM128_FAR:
+ ret += 3;
+ break;
- strcpy (p, name);
- input_line_pointer = p;
- cons (4);
- input_line_pointer = s;
-}
+ case UWOP_ALLOC_LARGE:
+ ret += (c->elems[i].info ? 3 : 2);
+ break;
-static void
-seh_make_globl (char *sym_name)
-{
- char *s = input_line_pointer;
+ default:
+ abort ();
+ }
- input_line_pointer = sym_name;
- s_globl (4);
- input_line_pointer = s;
+ return ret;
}
-static segT
-seh_make_section2 (const char *section_name, unsigned flags)
+/* Write out the xdata information for one function (x64). */
+
+static void
+seh_x64_write_function_xdata (seh_context *c)
{
- char *name;
- segT sec;
+ int flags, count_unwind_codes;
+ expressionS exp;
- name = xmalloc (strlen (section_name) + 1);
- strcpy (name, section_name);
+ /* Set 4-byte alignment. */
+ frag_align (2, 0, 0);
- 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)));
+ c->xdata_addr = symbol_temp_new_now ();
+ flags = c->handler_flags;
+ count_unwind_codes = seh_x64_size_prologue_data (c);
- return sec;
-}
+ /* ubyte:3 version, ubyte:5 flags. */
+ out_one ((flags << 3) | 1);
-static segT
-seh_make_section (void)
-{
- static segT seg_pdata = NULL;
- segT sec = NULL;
+ /* Size of prologue. */
+ if (c->endprologue_addr)
+ {
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = c->endprologue_addr;
+ exp.X_op_symbol = c->start_addr;
+ exp.X_add_number = 0;
+ emit_expr (&exp, 1);
+ }
+ else
+ out_one (0);
- if (!seg_pdata)
- seg_pdata = seh_make_section2 (".pdata", 0);
- sec = seg_pdata;
- return sec;
-}
+ /* Number of slots (i.e. shorts) in the unwind codes array. */
+ if (count_unwind_codes > 255)
+ as_fatal (_("too much unwind data in this .seh_proc"));
+ out_one (count_unwind_codes);
-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);
+ /* ubyte:4 frame-reg, ubyte:4 frame-reg-offset. */
+ /* Note that frameoff is already a multiple of 16, and therefore
+ the offset is already both scaled and shifted into place. */
+ out_one (c->frameoff | c->framereg);
- 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;
-}
+ seh_x64_write_prologue_data (c);
-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)
+ /* We need to align prologue data. */
+ if (count_unwind_codes & 1)
+ out_two (0);
+
+ if (flags & (UNW_FLAG_EHANDLER | UNW_FLAG_UHANDLER))
{
- seh_make_globl (sym_name);
- *addr = colon (sym_name);
+ /* Force the use of segment-relative relocations instead of absolute
+ valued expressions. Don't adjust for constants (e.g. NULL). */
+ if (c->handler.X_op == O_symbol)
+ c->handler.X_op = O_symbol_rva;
+ emit_expr (&c->handler, 4);
}
- return sym_name;
+
+ /* Handler data will be tacked in here by subsections. */
}
-/* x64 secific functions. */
+/* Write out xdata for one function. */
static void
-seh_fill_pcsyms (const seh_context *c, char **names, int *idx)
+write_function_xdata (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;
-
- names[0] = c->start_symbol;
- idx[0] = 0;
- if (c->elems_count == 0)
+ segT save_seg = now_seg;
+ int save_subseg = now_subseg;
+
+ /* MIPS, SH, ARM don't have xdata. */
+ if (seh_get_target_kind () != seh_kind_x64)
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;
-}
+ switch_xdata (c->subsection);
-static void
-seh_store_elm_data (const seh_context *c, int elm_start,int elm_end, unsigned char *puwop, valueT base)
-{
- int i = elm_end;
- valueT off;
+ seh_x64_write_function_xdata (c);
- /* We have to store in reverse order. */
- while (i > elm_start)
- {
- --i;
- /* First comes byte offset in code. */
- off = resolve_symbol_value (c->elems[i].pc_addr) - base;
- *puwop++ = (unsigned char) off;
- switch (c->elems[i].kind)
- {
- case UWOP_PUSH_NONVOL:
- *puwop = UWOP_PUSH_NONVOL | (c->elems[i].reg << 4);
- puwop++;
- break;
- case UWOP_SET_FPREG:
- *puwop++ = UWOP_SET_FPREG;
- break;
- case UWOP_PUSH_MACHFRAME:
- *puwop = UWOP_PUSH_MACHFRAME | (c->elems[i].reg << 4);
- puwop++;
- break;
- case UWOP_SAVE_NONVOL:
- if ((c->elems[i].offset & 7) != 0 ||
- ((c->elems[i].offset / 8) > 0xffff))
- {
- *puwop++ = UWOP_SAVE_NONVOL_FAR | (c->elems[i].reg << 4);
- bfd_putl32 ((bfd_vma) c->elems[i].offset, puwop);
- puwop += 4;
- }
- else
- {
- *puwop++ = UWOP_SAVE_NONVOL | (c->elems[i].reg << 4);
- bfd_putl16 ((bfd_vma) (c->elems[i].offset / 8), puwop);
- puwop += 2;
- }
- break;
- case UWOP_SAVE_XMM:
- if ((c->elems[i].offset & 7) != 0 ||
- ((c->elems[i].offset / 8) > 0xffff))
- {
- *puwop++ = UWOP_SAVE_XMM_FAR | (c->elems[i].reg << 4);
- bfd_putl32 ((bfd_vma) c->elems[i].offset, puwop);
- puwop += 4;
- }
- else
- {
- *puwop++ = UWOP_SAVE_XMM | (c->elems[i].reg << 4);
- bfd_putl16 ((bfd_vma) (c->elems[i].offset / 8), puwop);
- puwop += 2;
- }
- break;
- case UWOP_SAVE_XMM128:
- if ((c->elems[i].offset & 7) != 0 ||
- ((c->elems[i].offset / 8) > 0xffff))
- {
- *puwop++ = UWOP_SAVE_XMM128_FAR | (c->elems[i].reg << 4);
- bfd_putl32 ((bfd_vma) c->elems[i].offset, puwop);
- puwop += 4;
- }
- else
- {
- *puwop++ = UWOP_SAVE_XMM128 | (c->elems[i].reg << 4);
- bfd_putl16 ((bfd_vma) (c->elems[i].offset / 8), puwop);
- puwop += 2;
- }
- break;
- case UWOP_ALLOC_LARGE:
- if ((c->elems[i].offset & 7) != 0 ||
- ((c->elems[i].offset / 8) > 0xffff))
- {
- *puwop++ = UWOP_ALLOC_LARGE | (1 << 4);
- bfd_putl32 ((bfd_vma) c->elems[i].offset, puwop);
- puwop += 4;
- }
- else if ((c->elems[i].offset / 8) <= 0x10)
- {
- *puwop++ = UWOP_ALLOC_SMALL | (((c->elems[i].offset / 8) - 1) << 4);
- }
- else
- {
- *puwop++ = UWOP_ALLOC_LARGE;
- bfd_putl16 ((bfd_vma) (c->elems[i].offset / 8), puwop);
- puwop += 2;
- }
- break;
- default:
- puwop++;
- abort ();
- break;
- }
- }
+ subseg_set (save_seg, save_subseg);
}
-static size_t
-seh_getelm_data_size (const seh_context *c, int elm_start, int elm_end, size_t *unaligned_uwcodes)
-{
- size_t ret = 0;
-
- 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:
- if ((c->elems[elm_start].offset & 7) != 0 ||
- ((c->elems[elm_start].offset / 8) > 0xffff))
- ret += 6;
- else if ((c->elems[elm_start].offset / 8) <= 0x10)
- ret += 2;
- else
- ret += 4;
- break;
- case UWOP_SET_FPREG:
- ret += 2;
- break;
- default:
- ret += 2;
- break;
- }
- elm_start++;
- }
- if (unaligned_uwcodes)
- *unaligned_uwcodes = ret;
- ret = PEX64_UWI_SIZEOF_UWCODE_ARRAY ((ret / 2));
- return ret;
-}
+/* Write pdata section data for one function (arm). */
-static size_t
-seh_getsize_of_unwind_entry (seh_context *c, int elm_start, int elm_end, int bechain)
+static void
+seh_arm_write_function_pdata (seh_context *c)
{
- size_t ret = seh_getelm_data_size(c, elm_start, elm_end, NULL);
+ expressionS exp;
+ unsigned int prol_len = 0, func_len = 0;
+ unsigned int val;
- c->count_syms += 1;
- if (bechain)
- {
- ret += 4 + 4;
- c->count_syms += 1;
- c->count_reloc += 1;
- }
+ /* Start address of the function. */
+ exp.X_op = O_symbol;
+ exp.X_add_symbol = c->start_addr;
+ exp.X_add_number = 0;
+ emit_expr (&exp, 4);
+
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = c->end_addr;
+ exp.X_op_symbol = c->start_addr;
+ exp.X_add_number = 0;
+ if (resolve_expression (&exp) && exp.X_op == O_constant)
+ func_len = exp.X_add_number;
else
+ as_bad (_(".seh_endproc in a different section from .seh_proc"));
+
+ if (c->endprologue_addr)
{
- 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;
- }
- }
+ exp.X_op = O_subtract;
+ exp.X_add_symbol = c->endprologue_addr;
+ exp.X_op_symbol = c->start_addr;
+ exp.X_add_number = 0;
+
+ if (resolve_expression (&exp) && exp.X_op == O_constant)
+ prol_len = exp.X_add_number;
+ else
+ as_bad (_(".seh_endprologue in a different section from .seh_proc"));
}
- return ret;
+
+ /* Both function and prologue are in units of instructions. */
+ func_len >>= (c->use_instruction_32 ? 2 : 1);
+ prol_len >>= (c->use_instruction_32 ? 2 : 1);
+
+ /* Assemble the second word of the pdata. */
+ val = prol_len & 0xff;
+ val |= (func_len & 0x3fffff) << 8;
+ if (c->use_instruction_32)
+ val |= 0x40000000U;
+ if (c->handler_written)
+ val |= 0x80000000U;
+ out_four (val);
}
+/* Write out pdata for one function. */
+
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)
+write_function_pdata (seh_context *c)
{
- size_t off = *poffs;
- size_t it;
- valueT start_off = resolve_symbol_value (c->start_addr);
- valueT end_prologue;
- size_t unaligned_uwcodes = 0;
- size_t uwcodes = seh_getelm_data_size(c, elm_start, elm_end, &unaligned_uwcodes);
- 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) (unaligned_uwcodes / 2);
- data[off] = (unsigned char) c->framereg;
- data[off++] |= (unsigned char) ((c->frameoff / 16) << 4);
- seh_store_elm_data (c, elm_start, elm_end, &data[off], start_off);
- off += uwcodes;
- if (bechain)
- {
- char n[100];
+ expressionS exp;
+ segT save_seg = now_seg;
+ int save_subseg = now_subseg;
- 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)
+ switch_pdata ();
+
+ switch (seh_get_target_kind ())
{
- 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;
-}
+ case seh_kind_x64:
+ exp.X_op = O_symbol_rva;
+ exp.X_add_number = 0;
+
+ exp.X_add_symbol = c->start_addr;
+ emit_expr (&exp, 4);
+ exp.X_add_symbol = c->end_addr;
+ emit_expr (&exp, 4);
+ exp.X_add_symbol = c->xdata_addr;
+ emit_expr (&exp, 4);
+ break;
-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;
-}
+ case seh_kind_mips:
+ exp.X_op = O_symbol;
+ exp.X_add_number = 0;
-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;
-}
+ exp.X_add_symbol = c->start_addr;
+ emit_expr (&exp, 4);
+ exp.X_add_symbol = c->end_addr;
+ emit_expr (&exp, 4);
-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];
+ emit_expr (&c->handler, 4);
+ emit_expr (&c->handler_data, 4);
- 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;
-}
+ exp.X_add_symbol = (c->endprologue_addr
+ ? c->endprologue_addr
+ : c->start_addr);
+ emit_expr (&exp, 4);
+ break;
-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;
+ case seh_kind_arm:
+ seh_arm_write_function_pdata (c);
+ break;
- 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;
+ default:
+ abort ();
}
- 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;
+
+ subseg_set (save_seg, save_subseg);
}
projects / binutils-gdb.git / commitdiff