diff options
Diffstat (limited to 'gdb/disasm.h')
| -rw-r--r-- | gdb/disasm.h | 65 |
1 files changed, 41 insertions, 24 deletions
diff --git a/gdb/disasm.h b/gdb/disasm.h index da03e13..54176eb 100644 --- a/gdb/disasm.h +++ b/gdb/disasm.h @@ -58,16 +58,14 @@ protected: using fprintf_ftype = decltype (disassemble_info::fprintf_func); using fprintf_styled_ftype = decltype (disassemble_info::fprintf_styled_func); - /* Constructor, many fields in m_di are initialized from GDBARCH. STREAM - is where the output of the disassembler will be written too, the - remaining arguments are function callbacks that are written into - m_di. Of these function callbacks FPRINTF_FUNC and - FPRINTF_STYLED_FUNC must not be nullptr. If READ_MEMORY_FUNC, - MEMORY_ERROR_FUNC, or PRINT_ADDRESS_FUNC are nullptr, then that field - within m_di is left with its default value (see the libopcodes - function init_disassemble_info for the defaults). */ + /* Constructor, many fields in m_di are initialized from GDBARCH. The + remaining arguments are function callbacks that are written into m_di. + Of these function callbacks FPRINTF_FUNC and FPRINTF_STYLED_FUNC must + not be nullptr. If READ_MEMORY_FUNC, MEMORY_ERROR_FUNC, or + PRINT_ADDRESS_FUNC are nullptr, then that field within m_di is left + with its default value (see the libopcodes function + init_disassemble_info for the defaults). */ gdb_disassemble_info (struct gdbarch *gdbarch, - struct ui_file *stream, read_memory_ftype read_memory_func, memory_error_ftype memory_error_func, print_address_ftype print_address_func, @@ -77,10 +75,6 @@ protected: /* Destructor. */ virtual ~gdb_disassemble_info (); - /* The stream that disassembler output is being written too. */ - struct ui_file *stream () - { return (struct ui_file *) m_di.stream; } - /* Stores data required for disassembling instructions in opcodes. */ struct disassemble_info m_di; @@ -109,6 +103,10 @@ struct gdb_printing_disassembler : public gdb_disassemble_info protected: + /* The stream that disassembler output is being written too. */ + struct ui_file *stream () + { return m_stream; } + /* Constructor. All the arguments are just passed to the parent class. We also add the two print functions to the arguments passed to the parent. See gdb_disassemble_info for a description of how the @@ -118,22 +116,41 @@ protected: read_memory_ftype read_memory_func, memory_error_ftype memory_error_func, print_address_ftype print_address_func) - : gdb_disassemble_info (gdbarch, stream, read_memory_func, + : gdb_disassemble_info (gdbarch, read_memory_func, memory_error_func, print_address_func, - fprintf_func, fprintf_styled_func) - { /* Nothing. */ } - - /* Callback used as the disassemble_info's fprintf_func callback, this - writes to STREAM, which will be m_di.stream. */ - static int fprintf_func (void *stream, const char *format, ...) + fprintf_func, fprintf_styled_func), + m_stream (stream) + { + gdb_assert (stream != nullptr); + } + + /* Callback used as the disassemble_info's fprintf_func callback. The + DIS_INFO pointer is a pointer to a gdb_printing_disassembler object. + Content is written to the m_stream extracted from DIS_INFO. */ + static int fprintf_func (void *dis_info, const char *format, ...) ATTRIBUTE_PRINTF(2,3); - /* Callback used as the disassemble_info's fprintf_styled_func callback, - this writes to STREAM, which will be m_di.stream. */ - static int fprintf_styled_func (void *stream, + /* Callback used as the disassemble_info's fprintf_styled_func callback. + The DIS_INFO pointer is a pointer to a gdb_printing_disassembler + object. Content is written to the m_stream extracted from DIS_INFO. */ + static int fprintf_styled_func (void *dis_info, enum disassembler_style style, const char *format, ...) ATTRIBUTE_PRINTF(3,4); + +private: + + /* When libopcodes calls the fprintf_func and fprintf_styled_func + callbacks, a 'void *' argument is passed. We arrange, through our + call to init_disassemble_info that this argument will be a pointer to + a gdb_disassemble_info sub-class, specifically, a + gdb_printing_disassembler pointer. This helper function casts + DIS_INFO to the correct type (with some asserts), and then returns the + m_stream member variable. */ + static ui_file *stream_from_gdb_disassemble_info (void *dis_info); + + /* The stream to which output should be sent. */ + struct ui_file *m_stream; }; /* A basic disassembler that doesn't actually print anything. */ @@ -142,7 +159,7 @@ struct gdb_non_printing_disassembler : public gdb_disassemble_info { gdb_non_printing_disassembler (struct gdbarch *gdbarch, read_memory_ftype read_memory_func) - : gdb_disassemble_info (gdbarch, nullptr /* stream */, + : gdb_disassemble_info (gdbarch, read_memory_func, nullptr /* memory_error_func */, nullptr /* print_address_func */, |