+/* seh pdata/xdata coff object file format
+ Copyright (C) 2009-2020 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. */
+
/* Short overview:
There are at the moment three different function entry formats preset.
The first is the MIPS one. The second version
The third version has a function entry block of BeginAddress (RVA),
EndAddress (RVA), and UnwindData (RVA). The description of the
- prologue, excepetion-handler, and additional SEH data is stored
+ prologue, exception-handler, and additional SEH data is stored
within the UNWIND_DATA field in the xdata section.
The pseudos:
.seh_proc <fct_name>
.seh_endprologue
- .seh_handler <handler>[,<handler-data>]]
+ .seh_handler <handler>[,@unwind][,@except] (x64)
+ .seh_handler <handler>[,<handler_data>] (others)
+ .seh_handlerdata
.seh_eh
.seh_32/.seh_no32
.seh_endproc
.seh_stackalloc
.seh_pushreg
.seh_savereg
- .seh_savemm
.seh_savexmm
.seh_pushframe
- .seh_scope
- */
+ .seh_code
+*/
/* architecture specific pdata/xdata handling. */
#define SEH_CMDS \
{"seh_proc", obj_coff_seh_proc, 0}, \
{"seh_endproc", obj_coff_seh_endproc, 0}, \
- {"seh_pushreg", obj_coff_seh_push, 0}, \
- {"seh_savereg", obj_coff_seh_save, 0}, \
- {"seh_savemm", obj_coff_seh_save, 1}, \
+ {"seh_pushreg", obj_coff_seh_pushreg, 0}, \
+ {"seh_savereg", obj_coff_seh_save, 1}, \
{"seh_savexmm", obj_coff_seh_save, 2}, \
- {"seh_pushframe", obj_coff_seh_push, 1}, \
+ {"seh_pushframe", obj_coff_seh_pushframe, 0}, \
{"seh_endprologue", obj_coff_seh_endprologue, 0}, \
{"seh_setframe", obj_coff_seh_setframe, 0}, \
- {"seh_stackalloc", obj_coff_seh_stack_alloc, 0}, \
- {"seh_handler", obj_coff_seh_handler, 0}, \
+ {"seh_stackalloc", obj_coff_seh_stackalloc, 0}, \
{"seh_eh", obj_coff_seh_eh, 0}, \
{"seh_32", obj_coff_seh_32, 1}, \
{"seh_no32", obj_coff_seh_32, 0}, \
- {"seh_scope", obj_coff_seh_scope, 0},
+ {"seh_handler", obj_coff_seh_handler, 0}, \
+ {"seh_code", obj_coff_seh_code, 0}, \
+ {"seh_handlerdata", obj_coff_seh_handlerdata, 0},
/* Type definitions. */
typedef struct seh_prologue_element
{
+ int code;
+ int info;
+ offsetT off;
symbolS *pc_addr;
- char *pc_symbol;
- int kind;
- int reg;
- bfd_vma offset;
} seh_prologue_element;
-typedef struct seh_scope_elem {
- char *begin_addr;
- char *end_addr;
- char *handler_addr;
- char *jump_addr;
-} seh_scope_elem;
-
typedef struct seh_context
{
struct seh_context *next;
- /* Was record alread processed. */
- int done;
+
+ /* Initial code-segment. */
+ segT code_seg;
/* Function name. */
char *func_name;
/* BeginAddress. */
- char *start_symbol;
symbolS *start_addr;
- bfd_vma start_offset;
/* EndAddress. */
- char *end_symbol;
symbolS *end_addr;
- bfd_vma end_offset;
+ /* Unwind data. */
+ symbolS *xdata_addr;
/* PrologueEnd. */
- char *endprologue_symbol;
symbolS *endprologue_addr;
- bfd_vma endprologue_offset;
/* ExceptionHandler. */
- char *handler_name;
- /* ExceptionHandlerData. */
- char *handler_data_name;
+ expressionS handler;
+ /* ExceptionHandlerData. (arm, mips) */
+ expressionS handler_data;
+
+ /* ARM .seh_eh directive seen. */
int handler_written;
+
/* WinCE specific data. */
int use_instruction_32;
+ /* Was record already processed. */
+ int done;
+
+ /* x64 flags for the xdata header. */
+ int handler_flags;
+ int subsection;
- /* the bfd to store data within. */
- bfd *abfd;
- /* the current section to generate data within. */
- asection *section;
- /* Relocations for section. */
- unsigned int count_reloc;
- /* Symbols within section. */
- unsigned int count_syms;
- /* Iterator for text lable generation. */
- unsigned int tlbl_count;
- /* Iterator for xdata lable generation. */
- unsigned int xlbl_count;
- /* The name of the first xdata label. */
- char *xdata_first;
- /* FIelds used for x64 generation of chained information. */
- char **xdata_names;
- char **xdata_pcsyms;
- int *xdata_elm_start;
- /* Size and offset within current generated xdata section. */
- size_t xdata_sz;
- size_t xdata_offset;
/* x64 framereg and frame offset information. */
int framereg;
- bfd_vma frameoff;
+ int frameoff;
+
/* Information about x64 specific unwind data fields. */
- size_t elems_count;
- size_t elems_max;
+ int elems_count;
+ int elems_max;
seh_prologue_element *elems;
- size_t scope_max;
- size_t scope_count;
- seh_scope_elem *scopes;
} seh_context;
typedef enum seh_kind {
} seh_kind;
/* Forward declarations. */
-static void obj_coff_seh_stack_alloc (int);
+static void obj_coff_seh_stackalloc (int);
static void obj_coff_seh_setframe (int);
static void obj_coff_seh_endprologue (int);
-static void obj_coff_seh_save (int);
-static void obj_coff_seh_push (int);
+static void obj_coff_seh_save (int);
+static void obj_coff_seh_pushreg (int);
+static void obj_coff_seh_pushframe (int);
static void obj_coff_seh_endproc (int);
static void obj_coff_seh_eh (int);
static void obj_coff_seh_32 (int);
static void obj_coff_seh_proc (int);
static void obj_coff_seh_handler (int);
-static void obj_coff_seh_scope (int);
-static int seh_read_offset (const char *, bfd_vma *);
-static int seh_x64_read_reg (const char *, int, int *);
-static void seh_x64_make_prologue_element (int, int, bfd_vma);
-static void make_function_entry_pdata (seh_context *c);
+static void obj_coff_seh_handlerdata (int);
+static void obj_coff_seh_code (int);
+
+#define UNDSEC bfd_und_section_ptr
+
+/* Check if x64 UNW_... macros are already defined. */
+#ifndef PEX64_FLAG_NHANDLER
+/* We can't include here coff/pe.h header. So we have to copy macros
+ from coff/pe.h here. */
+#define PEX64_UNWCODE_CODE(VAL) ((VAL) & 0xf)
+#define PEX64_UNWCODE_INFO(VAL) (((VAL) >> 4) & 0xf)
+
+/* The unwind info. */
+#define UNW_FLAG_NHANDLER 0
+#define UNW_FLAG_EHANDLER 1
+#define UNW_FLAG_UHANDLER 2
+#define UNW_FLAG_FHANDLER 3
+#define UNW_FLAG_CHAININFO 4
+
+#define UNW_FLAG_MASK 0x1f
+
+/* The unwind codes. */
+#define UWOP_PUSH_NONVOL 0
+#define UWOP_ALLOC_LARGE 1
+#define UWOP_ALLOC_SMALL 2
+#define UWOP_SET_FPREG 3
+#define UWOP_SAVE_NONVOL 4
+#define UWOP_SAVE_NONVOL_FAR 5
+#define UWOP_SAVE_XMM 6
+#define UWOP_SAVE_XMM_FAR 7
+#define UWOP_SAVE_XMM128 8
+#define UWOP_SAVE_XMM128_FAR 9
+#define UWOP_PUSH_MACHFRAME 10
+
+#define PEX64_UWI_VERSION(VAL) ((VAL) & 7)
+#define PEX64_UWI_FLAGS(VAL) (((VAL) >> 3) & 0x1f)
+#define PEX64_UWI_FRAMEREG(VAL) ((VAL) & 0xf)
+#define PEX64_UWI_FRAMEOFF(VAL) (((VAL) >> 4) & 0xf)
+#define PEX64_UWI_SIZEOF_UWCODE_ARRAY(VAL) \
+ ((((VAL) + 1) & ~1) * 2)
+
+#define PEX64_OFFSET_TO_UNWIND_CODE 0x4
+
+#define PEX64_OFFSET_TO_HANDLER_RVA (COUNTOFUNWINDCODES) \
+ (PEX64_OFFSET_TO_UNWIND_CODE + \
+ PEX64_UWI_SIZEOF_UWCODE_ARRAY(COUNTOFUNWINDCODES))
+
+#define PEX64_OFFSET_TO_SCOPE_COUNT(COUNTOFUNWINDCODES) \
+ (PEX64_OFFSET_TO_HANDLER_RVA(COUNTOFUNWINDCODES) + 4)
+
+#define PEX64_SCOPE_ENTRY(COUNTOFUNWINDCODES, IDX) \
+ (PEX64_OFFSET_TO_SCOPE_COUNT(COUNTOFUNWINDCODES) + \
+ PEX64_SCOPE_ENTRY_SIZE * (IDX))
-#define UNDSEC (asection *) &bfd_und_section
+#endif
projects / deliverable / binutils-gdb.git / blobdiff