diff options
Diffstat (limited to 'src/3rdparty/masm/disassembler/udis86/udis86_input.c')
| -rw-r--r-- | src/3rdparty/masm/disassembler/udis86/udis86_input.c | 262 |
1 files changed, 262 insertions, 0 deletions
diff --git a/src/3rdparty/masm/disassembler/udis86/udis86_input.c b/src/3rdparty/masm/disassembler/udis86/udis86_input.c new file mode 100644 index 0000000000..4dbe328766 --- /dev/null +++ b/src/3rdparty/masm/disassembler/udis86/udis86_input.c @@ -0,0 +1,262 @@ +/* udis86 - libudis86/input.c + * + * Copyright (c) 2002-2009 Vivek Thampi + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * * Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR + * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON + * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#include "config.h" + +#if USE(UDIS86) + +#include "udis86_extern.h" +#include "udis86_types.h" +#include "udis86_input.h" + +/* ----------------------------------------------------------------------------- + * inp_buff_hook() - Hook for buffered inputs. + * ----------------------------------------------------------------------------- + */ +static int +inp_buff_hook(struct ud* u) +{ + if (u->inp_buff < u->inp_buff_end) + return *u->inp_buff++; + else return -1; +} + +#ifndef __UD_STANDALONE__ +/* ----------------------------------------------------------------------------- + * inp_file_hook() - Hook for FILE inputs. + * ----------------------------------------------------------------------------- + */ +static int +inp_file_hook(struct ud* u) +{ + return fgetc(u->inp_file); +} +#endif /* __UD_STANDALONE__*/ + +/* ============================================================================= + * ud_inp_set_hook() - Sets input hook. + * ============================================================================= + */ +extern void +ud_set_input_hook(register struct ud* u, int (*hook)(struct ud*)) +{ + u->inp_hook = hook; + ud_inp_init(u); +} + +extern void +ud_set_user_opaque_data( struct ud * u, void * opaque ) +{ + u->user_opaque_data = opaque; +} + +extern void * +ud_get_user_opaque_data( struct ud * u ) +{ + return u->user_opaque_data; +} + +/* ============================================================================= + * ud_inp_set_buffer() - Set buffer as input. + * ============================================================================= + */ +extern void +ud_set_input_buffer(register struct ud* u, uint8_t* buf, size_t len) +{ + u->inp_hook = inp_buff_hook; + u->inp_buff = buf; + u->inp_buff_end = buf + len; + ud_inp_init(u); +} + +#ifndef __UD_STANDALONE__ +/* ============================================================================= + * ud_input_set_file() - Set buffer as input. + * ============================================================================= + */ +extern void +ud_set_input_file(register struct ud* u, FILE* f) +{ + u->inp_hook = inp_file_hook; + u->inp_file = f; + ud_inp_init(u); +} +#endif /* __UD_STANDALONE__ */ + +/* ============================================================================= + * ud_input_skip() - Skip n input bytes. + * ============================================================================= + */ +extern void +ud_input_skip(struct ud* u, size_t n) +{ + while (n--) { + u->inp_hook(u); + } +} + +/* ============================================================================= + * ud_input_end() - Test for end of input. + * ============================================================================= + */ +extern int +ud_input_end(struct ud* u) +{ + return (u->inp_curr == u->inp_fill) && u->inp_end; +} + +/* ----------------------------------------------------------------------------- + * ud_inp_next() - Loads and returns the next byte from input. + * + * inp_curr and inp_fill are pointers to the cache. The program is written based + * on the property that they are 8-bits in size, and will eventually wrap around + * forming a circular buffer. So, the size of the cache is 256 in size, kind of + * unnecessary yet optimized. + * + * A buffer inp_sess stores the bytes disassembled for a single session. + * ----------------------------------------------------------------------------- + */ +extern uint8_t ud_inp_next(struct ud* u) +{ + int c = -1; + /* if current pointer is not upto the fill point in the + * input cache. + */ + if ( u->inp_curr != u->inp_fill ) { + c = u->inp_cache[ ++u->inp_curr ]; + /* if !end-of-input, call the input hook and get a byte */ + } else if ( u->inp_end || ( c = u->inp_hook( u ) ) == -1 ) { + /* end-of-input, mark it as an error, since the decoder, + * expected a byte more. + */ + u->error = 1; + /* flag end of input */ + u->inp_end = 1; + return 0; + } else { + /* increment pointers, we have a new byte. */ + u->inp_curr = ++u->inp_fill; + /* add the byte to the cache */ + u->inp_cache[ u->inp_fill ] = c; + } + /* record bytes input per decode-session. */ + u->inp_sess[ u->inp_ctr++ ] = c; + /* return byte */ + return ( uint8_t ) c; +} + +/* ----------------------------------------------------------------------------- + * ud_inp_back() - Move back a single byte in the stream. + * ----------------------------------------------------------------------------- + */ +extern void +ud_inp_back(struct ud* u) +{ + if ( u->inp_ctr > 0 ) { + --u->inp_curr; + --u->inp_ctr; + } +} + +/* ----------------------------------------------------------------------------- + * ud_inp_peek() - Peek into the next byte in source. + * ----------------------------------------------------------------------------- + */ +extern uint8_t +ud_inp_peek(struct ud* u) +{ + uint8_t r = ud_inp_next(u); + if ( !u->error ) ud_inp_back(u); /* Don't backup if there was an error */ + return r; +} + +/* ----------------------------------------------------------------------------- + * ud_inp_move() - Move ahead n input bytes. + * ----------------------------------------------------------------------------- + */ +extern void +ud_inp_move(struct ud* u, size_t n) +{ + while (n--) + ud_inp_next(u); +} + +/*------------------------------------------------------------------------------ + * ud_inp_uintN() - return uintN from source. + *------------------------------------------------------------------------------ + */ +extern uint8_t +ud_inp_uint8(struct ud* u) +{ + return ud_inp_next(u); +} + +extern uint16_t +ud_inp_uint16(struct ud* u) +{ + uint16_t r, ret; + + ret = ud_inp_next(u); + r = ud_inp_next(u); + return ret | (r << 8); +} + +extern uint32_t +ud_inp_uint32(struct ud* u) +{ + uint32_t r, ret; + + ret = ud_inp_next(u); + r = ud_inp_next(u); + ret = ret | (r << 8); + r = ud_inp_next(u); + ret = ret | (r << 16); + r = ud_inp_next(u); + return ret | (r << 24); +} + +extern uint64_t +ud_inp_uint64(struct ud* u) +{ + uint64_t r, ret; + + ret = ud_inp_next(u); + r = ud_inp_next(u); + ret = ret | (r << 8); + r = ud_inp_next(u); + ret = ret | (r << 16); + r = ud_inp_next(u); + ret = ret | (r << 24); + r = ud_inp_next(u); + ret = ret | (r << 32); + r = ud_inp_next(u); + ret = ret | (r << 40); + r = ud_inp_next(u); + ret = ret | (r << 48); + r = ud_inp_next(u); + return ret | (r << 56); +} + +#endif // USE(UDIS86) |