#include "solib.h"
#include "solib-target.h"
#include "gdbcore.h"
+#include "coff/internal.h"
+#include "libcoff.h"
+#include "solist.h"
+
+#define CYGWIN_DLL_NAME "cygwin1.dll"
/* Windows signal numbers differ between MinGW flavors and between
- those and Cygwin. The below enumeration was gleaned from the
- respective headers; the ones marked with MinGW64/Cygwin are defined
- only by MinGW64 and Cygwin, not by mingw.org's MinGW. FIXME: We
- should really have distinct MinGW vs Cygwin OSABIs, and two
- separate enums, selected at runtime. */
+ those and Cygwin. The below enumerations were gleaned from the
+ respective headers. */
+
+/* Signal numbers for the various MinGW flavors. The ones marked with
+ MinGW-w64 are defined by MinGW-w64, not by mingw.org's MinGW. */
enum
- {
- WINDOWS_SIGHUP = 1, /* MinGW64/Cygwin */
- WINDOWS_SIGINT = 2,
- WINDOWS_SIGQUIT = 3, /* MinGW64/Cygwin */
- WINDOWS_SIGILL = 4,
- WINDOWS_SIGTRAP = 5, /* MinGW64/Cygwin */
-#ifdef __CYGWIN__
- WINDOWS_SIGABRT = 6,
-#else
- WINDOWS_SIGIOT = 6, /* MinGW64 */
-#endif
- WINDOWS_SIGEMT = 7, /* MinGW64/Cygwin */
- WINDOWS_SIGFPE = 8,
- WINDOWS_SIGKILL = 9, /* MinGW64/Cygwin */
- WINDOWS_SIGBUS = 10, /* MinGW64/Cygwin */
- WINDOWS_SIGSEGV = 11,
- WINDOWS_SIGSYS = 12, /* MinGW64/Cygwin */
- WINDOWS_SIGPIPE = 13,/* MinGW64/Cygwin */
- WINDOWS_SIGALRM = 14,/* MinGW64/Cygwin */
- WINDOWS_SIGTERM = 15,
-#ifdef __CYGWIN__
- WINDOWS_SIGURG = 16,
- WINDOWS_SIGSTOP = 17,
- WINDOWS_SIGTSTP = 18,
- WINDOWS_SIGCONT = 19,
- WINDOWS_SIGCHLD = 20,
- WINDOWS_SIGTTIN = 21,
- WINDOWS_SIGTTOU = 22,
- WINDOWS_SIGIO = 23,
- WINDOWS_SIGXCPU = 24,
- WINDOWS_SIGXFSZ = 25,
- WINDOWS_SIGVTALRM = 26,
- WINDOWS_SIGPROF = 27,
- WINDOWS_SIGWINCH = 28,
- WINDOWS_SIGLOST = 29,
- WINDOWS_SIGUSR1 = 30,
- WINDOWS_SIGUSR2 = 31
-#else
- WINDOWS_SIGBREAK = 21,
- WINDOWS_SIGABRT = 22
-#endif
- };
+{
+ WINDOWS_SIGHUP = 1, /* MinGW-w64 */
+ WINDOWS_SIGINT = 2,
+ WINDOWS_SIGQUIT = 3, /* MinGW-w64 */
+ WINDOWS_SIGILL = 4,
+ WINDOWS_SIGTRAP = 5, /* MinGW-w64 */
+ WINDOWS_SIGIOT = 6, /* MinGW-w64 */
+ WINDOWS_SIGEMT = 7, /* MinGW-w64 */
+ WINDOWS_SIGFPE = 8,
+ WINDOWS_SIGKILL = 9, /* MinGW-w64 */
+ WINDOWS_SIGBUS = 10, /* MinGW-w64 */
+ WINDOWS_SIGSEGV = 11,
+ WINDOWS_SIGSYS = 12, /* MinGW-w64 */
+ WINDOWS_SIGPIPE = 13, /* MinGW-w64 */
+ WINDOWS_SIGALRM = 14, /* MinGW-w64 */
+ WINDOWS_SIGTERM = 15,
+ WINDOWS_SIGBREAK = 21,
+ WINDOWS_SIGABRT = 22,
+};
+
+/* Signal numbers for Cygwin. */
+
+enum
+{
+ CYGWIN_SIGHUP = 1,
+ CYGWIN_SIGINT = 2,
+ CYGWIN_SIGQUIT = 3,
+ CYGWIN_SIGILL = 4,
+ CYGWIN_SIGTRAP = 5,
+ CYGWIN_SIGABRT = 6,
+ CYGWIN_SIGEMT = 7,
+ CYGWIN_SIGFPE = 8,
+ CYGWIN_SIGKILL = 9,
+ CYGWIN_SIGBUS = 10,
+ CYGWIN_SIGSEGV = 11,
+ CYGWIN_SIGSYS = 12,
+ CYGWIN_SIGPIPE = 13,
+ CYGWIN_SIGALRM = 14,
+ CYGWIN_SIGTERM = 15,
+ CYGWIN_SIGURG = 16,
+ CYGWIN_SIGSTOP = 17,
+ CYGWIN_SIGTSTP = 18,
+ CYGWIN_SIGCONT = 19,
+ CYGWIN_SIGCHLD = 20,
+ CYGWIN_SIGTTIN = 21,
+ CYGWIN_SIGTTOU = 22,
+ CYGWIN_SIGIO = 23,
+ CYGWIN_SIGXCPU = 24,
+ CYGWIN_SIGXFSZ = 25,
+ CYGWIN_SIGVTALRM = 26,
+ CYGWIN_SIGPROF = 27,
+ CYGWIN_SIGWINCH = 28,
+ CYGWIN_SIGLOST = 29,
+ CYGWIN_SIGUSR1 = 30,
+ CYGWIN_SIGUSR2 = 31,
+};
struct cmd_list_element *info_w32_cmdlist;
struct windows_gdbarch_data
{
struct type *siginfo_type;
+ struct type *tib_ptr_type; /* Type of thread information block */
};
/* Allocate windows_gdbarch_data for an arch. */
static struct type *
windows_get_tlb_type (struct gdbarch *gdbarch)
{
- static struct gdbarch *last_gdbarch = NULL;
- static struct type *last_tlb_type = NULL;
struct type *dword_ptr_type, *dword32_type, *void_ptr_type;
struct type *peb_ldr_type, *peb_ldr_ptr_type;
struct type *peb_type, *peb_ptr_type, *list_type;
struct type *word_type, *wchar_type, *wchar_ptr_type;
struct type *uni_str_type, *rupp_type, *rupp_ptr_type;
- /* Do not rebuild type if same gdbarch as last time. */
- if (last_tlb_type && last_gdbarch == gdbarch)
- return last_tlb_type;
-
+ windows_gdbarch_data *windows_gdbarch_data
+ = get_windows_gdbarch_data (gdbarch);
+ if (windows_gdbarch_data->tib_ptr_type != nullptr)
+ return windows_gdbarch_data->tib_ptr_type;
+
dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
1, "DWORD_PTR");
dword32_type = arch_integer_type (gdbarch, 32,
/* list entry */
list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (list_type) = xstrdup ("list");
+ list_type->set_name (xstrdup ("list"));
module_list_ptr_type = void_ptr_type;
/* Structured Exception Handler */
seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (seh_type) = xstrdup ("seh");
+ seh_type->set_name (xstrdup ("seh"));
seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
/* struct _PEB_LDR_DATA */
peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (peb_ldr_type) = xstrdup ("peb_ldr_data");
+ peb_ldr_type->set_name (xstrdup ("peb_ldr_data"));
append_composite_type_field (peb_ldr_type, "length", dword32_type);
append_composite_type_field (peb_ldr_type, "initialized", dword32_type);
/* struct process environment block */
peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (peb_type) = xstrdup ("peb");
+ peb_type->set_name (xstrdup ("peb"));
/* First bytes contain several flags. */
append_composite_type_field (peb_type, "flags", dword_ptr_type);
/* struct thread information block */
tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- TYPE_NAME (tib_type) = xstrdup ("tib");
+ tib_type->set_name (xstrdup ("tib"));
/* uint32_t current_seh; %fs:0x0000 */
append_composite_type_field (tib_type, "current_seh", seh_ptr_type);
NULL);
TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
- last_tlb_type = tib_ptr_type;
- last_gdbarch = gdbarch;
+ windows_gdbarch_data->tib_ptr_type = tib_ptr_type;
return tib_ptr_type;
}
if (!text_offset)
{
- gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget, -1));
+ gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget));
/* The following calls are OK even if dll is NULL.
The default value 0x1000 is returned by pe_text_section_offset
in that case. */
"Thread Information Block is %s.\n"), value);
}
-static void
-info_w32_command (const char *args, int from_tty)
-{
- help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout);
-}
static int w32_prefix_command_valid = 0;
void
{
if (!w32_prefix_command_valid)
{
- add_prefix_cmd ("w32", class_info, info_w32_command,
- _("Print information specific to Win32 debugging."),
- &info_w32_cmdlist, "info w32 ", 0, &infolist);
+ add_basic_prefix_cmd
+ ("w32", class_info,
+ _("Print information specific to Win32 debugging."),
+ &info_w32_cmdlist, "info w32 ", 0, &infolist);
w32_prefix_command_valid = 1;
}
}
-/* Implementation of `gdbarch_gdb_signal_to_target'. */
+/* Implementation of `gdbarch_gdb_signal_to_target' for Windows. */
static int
windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
return WINDOWS_SIGALRM;
case GDB_SIGNAL_TERM:
return WINDOWS_SIGTERM;
-#ifdef __CYGWIN__
+ }
+ return -1;
+}
+
+/* Implementation of `gdbarch_gdb_signal_to_target' for Cygwin. */
+
+static int
+cygwin_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
+{
+ switch (signal)
+ {
+ case GDB_SIGNAL_0:
+ return 0;
+ case GDB_SIGNAL_HUP:
+ return CYGWIN_SIGHUP;
+ case GDB_SIGNAL_INT:
+ return CYGWIN_SIGINT;
+ case GDB_SIGNAL_QUIT:
+ return CYGWIN_SIGQUIT;
+ case GDB_SIGNAL_ILL:
+ return CYGWIN_SIGILL;
+ case GDB_SIGNAL_TRAP:
+ return CYGWIN_SIGTRAP;
+ case GDB_SIGNAL_ABRT:
+ return CYGWIN_SIGABRT;
+ case GDB_SIGNAL_EMT:
+ return CYGWIN_SIGEMT;
+ case GDB_SIGNAL_FPE:
+ return CYGWIN_SIGFPE;
+ case GDB_SIGNAL_KILL:
+ return CYGWIN_SIGKILL;
+ case GDB_SIGNAL_BUS:
+ return CYGWIN_SIGBUS;
+ case GDB_SIGNAL_SEGV:
+ return CYGWIN_SIGSEGV;
+ case GDB_SIGNAL_SYS:
+ return CYGWIN_SIGSYS;
+ case GDB_SIGNAL_PIPE:
+ return CYGWIN_SIGPIPE;
+ case GDB_SIGNAL_ALRM:
+ return CYGWIN_SIGALRM;
+ case GDB_SIGNAL_TERM:
+ return CYGWIN_SIGTERM;
case GDB_SIGNAL_URG:
- return WINDOWS_SIGURG;
+ return CYGWIN_SIGURG;
case GDB_SIGNAL_STOP:
- return WINDOWS_SIGSTOP;
+ return CYGWIN_SIGSTOP;
case GDB_SIGNAL_TSTP:
- return WINDOWS_SIGTSTP;
+ return CYGWIN_SIGTSTP;
case GDB_SIGNAL_CONT:
- return WINDOWS_SIGCONT;
+ return CYGWIN_SIGCONT;
case GDB_SIGNAL_CHLD:
- return WINDOWS_SIGCHLD;
+ return CYGWIN_SIGCHLD;
case GDB_SIGNAL_TTIN:
- return WINDOWS_SIGTTIN;
+ return CYGWIN_SIGTTIN;
case GDB_SIGNAL_TTOU:
- return WINDOWS_SIGTTOU;
+ return CYGWIN_SIGTTOU;
case GDB_SIGNAL_IO:
- return WINDOWS_SIGIO;
+ return CYGWIN_SIGIO;
case GDB_SIGNAL_XCPU:
- return WINDOWS_SIGXCPU;
+ return CYGWIN_SIGXCPU;
case GDB_SIGNAL_XFSZ:
- return WINDOWS_SIGXFSZ;
+ return CYGWIN_SIGXFSZ;
case GDB_SIGNAL_VTALRM:
- return WINDOWS_SIGVTALRM;
+ return CYGWIN_SIGVTALRM;
case GDB_SIGNAL_PROF:
- return WINDOWS_SIGPROF;
+ return CYGWIN_SIGPROF;
case GDB_SIGNAL_WINCH:
- return WINDOWS_SIGWINCH;
+ return CYGWIN_SIGWINCH;
case GDB_SIGNAL_PWR:
- return WINDOWS_SIGLOST;
+ return CYGWIN_SIGLOST;
case GDB_SIGNAL_USR1:
- return WINDOWS_SIGUSR1;
+ return CYGWIN_SIGUSR1;
case GDB_SIGNAL_USR2:
- return WINDOWS_SIGUSR2;
-#endif /* __CYGWIN__ */
+ return CYGWIN_SIGUSR2;
}
return -1;
}
+struct enum_value_name
+{
+ uint32_t value;
+ const char *name;
+};
+
+/* Allocate a TYPE_CODE_ENUM type structure with its named values. */
+
+static struct type *
+create_enum (struct gdbarch *gdbarch, int bit, const char *name,
+ const struct enum_value_name *values, int count)
+{
+ struct type *type;
+ int i;
+
+ type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name);
+ type->set_num_fields (count);
+ type->set_fields
+ ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * count));
+ TYPE_UNSIGNED (type) = 1;
+
+ for (i = 0; i < count; i++)
+ {
+ TYPE_FIELD_NAME (type, i) = values[i].name;
+ SET_FIELD_ENUMVAL (type->field (i), values[i].value);
+ }
+
+ return type;
+}
+
+static const struct enum_value_name exception_values[] =
+{
+ { 0x40000015, "FATAL_APP_EXIT" },
+ { 0x4000001E, "WX86_SINGLE_STEP" },
+ { 0x4000001F, "WX86_BREAKPOINT" },
+ { 0x40010005, "DBG_CONTROL_C" },
+ { 0x40010008, "DBG_CONTROL_BREAK" },
+ { 0x80000002, "DATATYPE_MISALIGNMENT" },
+ { 0x80000003, "BREAKPOINT" },
+ { 0x80000004, "SINGLE_STEP" },
+ { 0xC0000005, "ACCESS_VIOLATION" },
+ { 0xC0000006, "IN_PAGE_ERROR" },
+ { 0xC000001D, "ILLEGAL_INSTRUCTION" },
+ { 0xC0000025, "NONCONTINUABLE_EXCEPTION" },
+ { 0xC0000026, "INVALID_DISPOSITION" },
+ { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" },
+ { 0xC000008D, "FLOAT_DENORMAL_OPERAND" },
+ { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" },
+ { 0xC000008F, "FLOAT_INEXACT_RESULT" },
+ { 0xC0000090, "FLOAT_INVALID_OPERATION" },
+ { 0xC0000091, "FLOAT_OVERFLOW" },
+ { 0xC0000092, "FLOAT_STACK_CHECK" },
+ { 0xC0000093, "FLOAT_UNDERFLOW" },
+ { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" },
+ { 0xC0000095, "INTEGER_OVERFLOW" },
+ { 0xC0000096, "PRIV_INSTRUCTION" },
+ { 0xC00000FD, "STACK_OVERFLOW" },
+ { 0xC0000409, "FAST_FAIL" },
+};
+
+static const struct enum_value_name violation_values[] =
+{
+ { 0, "READ_ACCESS_VIOLATION" },
+ { 1, "WRITE_ACCESS_VIOLATION" },
+ { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" },
+};
+
/* Implement the "get_siginfo_type" gdbarch method. */
static struct type *
{
struct windows_gdbarch_data *windows_gdbarch_data;
struct type *dword_type, *pvoid_type, *ulongptr_type;
- struct type *siginfo_ptr_type, *siginfo_type;
+ struct type *code_enum, *violation_enum;
+ struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type;
windows_gdbarch_data = get_windows_gdbarch_data (gdbarch);
if (windows_gdbarch_data->siginfo_type != NULL)
ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
1, "ULONG_PTR");
+ /* ExceptionCode value names */
+ code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch),
+ "ExceptionCode", exception_values,
+ ARRAY_SIZE (exception_values));
+
+ /* ACCESS_VIOLATION type names */
+ violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch),
+ "ViolationType", violation_values,
+ ARRAY_SIZE (violation_values));
+
+ /* ACCESS_VIOLATION information */
+ violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
+ append_composite_type_field (violation_type, "Type", violation_enum);
+ append_composite_type_field (violation_type, "Address", pvoid_type);
+
+ /* Unnamed union of the documented field ExceptionInformation,
+ and the alternative AccessViolationInformation (which displays
+ human-readable values for ExceptionCode ACCESS_VIOLATION). */
+ para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
+ append_composite_type_field (para_type, "ExceptionInformation",
+ lookup_array_range_type (ulongptr_type, 0, 14));
+ append_composite_type_field (para_type, "AccessViolationInformation",
+ violation_type);
+
siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD",
TYPE_CODE_STRUCT);
siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
NULL, siginfo_type);
- append_composite_type_field (siginfo_type, "ExceptionCode", dword_type);
+ /* ExceptionCode is documented as type DWORD, but here a helper
+ enum type is used instead to display a human-readable value. */
+ append_composite_type_field (siginfo_type, "ExceptionCode", code_enum);
append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type);
append_composite_type_field (siginfo_type, "ExceptionRecord",
siginfo_ptr_type);
pvoid_type);
append_composite_type_field (siginfo_type, "NumberParameters", dword_type);
/* The 64-bit variant needs some padding. */
- append_composite_type_field_aligned (siginfo_type, "ExceptionInformation",
- lookup_array_range_type (ulongptr_type,
- 0, 14),
- TYPE_LENGTH (ulongptr_type));
+ append_composite_type_field_aligned (siginfo_type, "",
+ para_type, TYPE_LENGTH (ulongptr_type));
windows_gdbarch_data->siginfo_type = siginfo_type;
return siginfo_type;
}
-/* To be called from the various GDB_OSABI_CYGWIN handlers for the
- various Windows architectures and machine types. */
+/* Implement the "solib_create_inferior_hook" target_so_ops method. */
-void
-windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+static void
+windows_solib_create_inferior_hook (int from_tty)
+{
+ CORE_ADDR exec_base = 0;
+
+ /* Find base address of main executable in
+ TIB->process_environment_block->image_base_address. */
+ struct gdbarch *gdbarch = target_gdbarch ();
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ int ptr_bytes;
+ int peb_offset; /* Offset of process_environment_block in TIB. */
+ int base_offset; /* Offset of image_base_address in PEB. */
+ if (gdbarch_ptr_bit (gdbarch) == 32)
+ {
+ ptr_bytes = 4;
+ peb_offset = 48;
+ base_offset = 8;
+ }
+ else
+ {
+ ptr_bytes = 8;
+ peb_offset = 96;
+ base_offset = 16;
+ }
+ CORE_ADDR tlb;
+ gdb_byte buf[8];
+ if (target_has_execution
+ && target_get_tib_address (inferior_ptid, &tlb)
+ && !target_read_memory (tlb + peb_offset, buf, ptr_bytes))
+ {
+ CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order);
+ if (!target_read_memory (peb + base_offset, buf, ptr_bytes))
+ exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order);
+ }
+
+ /* Rebase executable if the base address changed because of ASLR. */
+ if (symfile_objfile != nullptr && exec_base != 0)
+ {
+ CORE_ADDR vmaddr = pe_data (exec_bfd)->pe_opthdr.ImageBase;
+ if (vmaddr != exec_base)
+ objfile_rebase (symfile_objfile, exec_base - vmaddr);
+ }
+}
+
+static struct target_so_ops windows_so_ops;
+
+/* Common parts for gdbarch initialization for the Windows and Cygwin OS
+ ABIs. */
+
+static void
+windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_wchar_bit (gdbarch, 16);
set_gdbarch_wchar_signed (gdbarch, 0);
set_gdbarch_iterate_over_objfiles_in_search_order
(gdbarch, windows_iterate_over_objfiles_in_search_order);
+ windows_so_ops = solib_target_so_ops;
+ windows_so_ops.solib_create_inferior_hook
+ = windows_solib_create_inferior_hook;
+ set_solib_ops (gdbarch, &windows_so_ops);
+
+ set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
+}
+
+/* See windows-tdep.h. */
+void
+windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ windows_init_abi_common (info, gdbarch);
set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target);
+}
- set_solib_ops (gdbarch, &solib_target_so_ops);
+/* See windows-tdep.h. */
- set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
+void
+cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ windows_init_abi_common (info, gdbarch);
+ set_gdbarch_gdb_signal_to_target (gdbarch, cygwin_gdb_signal_to_target);
}
/* Implementation of `tlb' variable. */
NULL
};
+/* Layout of an element of a PE's Import Directory Table. Based on:
+
+ https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table
+ */
+
+struct pe_import_directory_entry
+{
+ uint32_t import_lookup_table_rva;
+ uint32_t timestamp;
+ uint32_t forwarder_chain;
+ uint32_t name_rva;
+ uint32_t import_address_table_rva;
+};
+
+gdb_static_assert (sizeof (pe_import_directory_entry) == 20);
+
+/* See windows-tdep.h. */
+
+bool
+is_linked_with_cygwin_dll (bfd *abfd)
+{
+ /* The list of DLLs a PE is linked to is in the .idata section. See:
+
+ https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section
+ */
+ asection *idata_section = bfd_get_section_by_name (abfd, ".idata");
+ if (idata_section == nullptr)
+ return false;
+
+ bfd_size_type idata_section_size = bfd_section_size (idata_section);
+ internal_extra_pe_aouthdr *pe_extra = &pe_data (abfd)->pe_opthdr;
+ bfd_vma import_table_va = pe_extra->DataDirectory[PE_IMPORT_TABLE].VirtualAddress;
+ bfd_vma idata_section_va = bfd_section_vma (idata_section);
+
+ /* The section's virtual address as reported by BFD has the image base applied,
+ remove it. */
+ gdb_assert (idata_section_va >= pe_extra->ImageBase);
+ idata_section_va -= pe_extra->ImageBase;
+
+ bfd_vma idata_section_end_va = idata_section_va + idata_section_size;
+
+ /* Make sure that the import table is indeed within the .idata section's range. */
+ if (import_table_va < idata_section_va
+ || import_table_va >= idata_section_end_va)
+ {
+ warning (_("\
+%s: import table's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata \
+section's range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
+ bfd_get_filename (abfd), import_table_va, idata_section_va,
+ idata_section_end_va);
+ return false;
+ }
+
+ /* The import table starts at this offset into the .idata section. */
+ bfd_vma import_table_offset_in_sect = import_table_va - idata_section_va;
+
+ /* Get the section's data. */
+ gdb::byte_vector idata_contents;
+ if (!gdb_bfd_get_full_section_contents (abfd, idata_section, &idata_contents))
+ {
+ warning (_("%s: failed to get contents of .idata section."),
+ bfd_get_filename (abfd));
+ return false;
+ }
+
+ gdb_assert (idata_contents.size () == idata_section_size);
+
+ const gdb_byte *iter = idata_contents.data () + import_table_offset_in_sect;
+ const gdb_byte *end = idata_contents.data () + idata_section_size;
+ const pe_import_directory_entry null_dir_entry = { 0 };
+
+ /* Iterate through all directory entries. */
+ while (true)
+ {
+ /* Is there enough space left in the section for another entry? */
+ if (iter + sizeof (pe_import_directory_entry) > end)
+ {
+ warning (_("%s: unexpected end of .idata section."),
+ bfd_get_filename (abfd));
+ break;
+ }
+
+ pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter;
+
+ /* Is it the end of list marker? */
+ if (memcmp (dir_entry, &null_dir_entry,
+ sizeof (pe_import_directory_entry)) == 0)
+ break;
+
+ bfd_vma name_va = dir_entry->name_rva;
+
+ /* If the name's virtual address is smaller than the section's virtual
+ address, there's a problem. */
+ if (name_va < idata_section_va || name_va >= idata_section_end_va)
+ {
+ warning (_("\
+%s: name's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata section's \
+range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
+ bfd_get_filename (abfd), name_va, idata_section_va,
+ idata_section_end_va);
+ break;
+ }
+
+ const gdb_byte *name = &idata_contents[name_va - idata_section_va];
+
+ /* Make sure we don't overshoot the end of the section with the
+ streq. */
+ if (name + sizeof (CYGWIN_DLL_NAME) <= end)
+ {
+ /* Finally, check if this is the dll name we are looking for. */
+ if (streq ((const char *) name, CYGWIN_DLL_NAME))
+ return true;
+ }
+
+ iter += sizeof (pe_import_directory_entry);
+ }
+
+ return false;
+}
+
void _initialize_windows_tdep ();
void
_initialize_windows_tdep ()
projects / deliverable / binutils-gdb.git / blobdiff