/*
* Copyright ( c ) 2019 , 2022 , Oracle and / or its affiliates . All rights reserved .
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER .
*
* The Universal Permissive License ( UPL ) , Version 1 . 0
*
* Subject to the condition set forth below , permission is hereby granted to
* any person obtaining a copy of this software , associated documentation
* and / or data ( collectively the " Software " ) , free of charge and under any
* and all copyright rights in the Software , and any and all patent rights
* owned or freely licensable by each licensor hereunder covering either ( i )
* the unmodified Software as contributed to or provided by such licensor ,
* or ( ii ) the Larger Works ( as defined below ) , to deal in both
*
* ( a ) the Software , and
*
* ( b ) any piece of software and / or hardware listed in the lrgrwrks . txt file
* if one is included with the Software ( each a " Larger Work " to which the
* Software is contributed by such licensors ) ,
*
* without restriction , including without limitation the rights to copy ,
* create derivative works of , display , perform , and distribute the Software
* and make , use , sell , offer for sale , import , export , have made , and have
* sold the Software and the Larger Work ( s ) , and to sublicense the foregoing
* rights on either these or other terms .
*
* This license is subject to the following condition :
*
* The above copyright notice and either this complete permission notice or
* at a minimum a reference to the UPL must be included in all copies or
* substantial portions of the Software .
*
* THE SOFTWARE IS PROVIDED " AS IS " , WITHOUT WARRANTY OF ANY KIND , EXPRESS
* OR IMPLIED , INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY , FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT . IN
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*
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*/
/* hsdis.c -- dump a range of addresses as native instructions
This implements the plugin protocol required by the
HotSpot PrintAssembly option .
*/
#include <inttypes.h>
#include <string.h>
#include <capstone.h>
#include "hsdis.h"
/* short names for stuff in hsdis.h */
typedef decode_instructions_event_callback_ftype event_callback_t;
typedef decode_instructions_printf_callback_ftype printf_callback_t;
#define print(...) (*printf_callback) (printf_stream, __VA_ARGS__)
static void * null_event_callback(void * ignore_stream, const char * ignore_event, void * arg) {
return NULL;
}
/* print all events as XML markup */
static void * xml_event_callback(void * stream, const char * event, void * arg) {
FILE* fp = (FILE*) stream;
#define NS_PFX "dis:"
if (event[0 ] != '/' ) {
/* issue the tag, with or without a formatted argument */
fprintf(fp, "<" NS_PFX);
fprintf(fp, event, arg);
fprintf(fp, ">" );
} else {
++event; /* skip slash */
fprintf(fp, "</" NS_PFX"%s>" , event);
}
return NULL;
}
static const char * INTEL_SYNTAX_OP = "intel" ;
typedef struct {
bool intel_syntax;
} Options;
static Options parse_options(const char * options, printf_callback_t printf_callback, void * printf_stream) {
Options ops;
// initialize with defaults
ops.intel_syntax = false ;
const char * cursor = options;
while (*cursor != '\0' ) {
if (*cursor == ',' ) {
cursor++;
}
if (strncmp(cursor, INTEL_SYNTAX_OP, strlen(INTEL_SYNTAX_OP)) == 0 ) {
cursor += strlen(INTEL_SYNTAX_OP);
ops.intel_syntax = true ;
} else {
const char * end = strchr(cursor, ',' );
if (end == NULL) {
end = strchr(cursor, '\0' );
}
print("Unknown PrintAssembly option: %.*s\n" , (int ) (end - cursor), cursor);
cursor = end;
}
}
return ops;
}
#ifdef _WIN32
__declspec(dllexport)
#endif
void * decode_instructions_virtual(uintptr_t start_va, uintptr_t end_va,
unsigned char * buffer, uintptr_t length,
event_callback_t event_callback,
void * event_stream,
printf_callback_t printf_callback,
void * printf_stream,
const char * options,
int newline /* bool value for nice new line */) {
csh cs_handle;
if (printf_callback == NULL) {
int (*fprintf_callback)(FILE*, const char *, ...) = &fprintf;
FILE* fprintf_stream = stdout;
printf_callback = (printf_callback_t) fprintf_callback;
if (printf_stream == NULL)
printf_stream = (void *) fprintf_stream;
}
if (event_callback == NULL) {
if (event_stream == NULL)
event_callback = &null_event_callback;
else
event_callback = &xml_event_callback;
}
if (cs_open(CAPSTONE_ARCH, CAPSTONE_MODE, &cs_handle) != CS_ERR_OK) {
print("Could not open cs_handle" );
return NULL;
}
Options ops = parse_options(options, printf_callback, printf_stream);
cs_option(cs_handle, CS_OPT_SYNTAX, ops.intel_syntax ? CS_OPT_SYNTAX_INTEL : CS_OPT_SYNTAX_ATT);
cs_insn *insn;
size_t count = cs_disasm(cs_handle, buffer, length, (uintptr_t) buffer, 0 , &insn);
if (count) {
for (unsigned int j = 0 ; j < count; j++) {
(*event_callback)(event_stream, "insn" , (void *) insn[j].address);
print("%s\t\t%s" , insn[j].mnemonic, insn[j].op_str);
(*event_callback)(event_stream, "/insn" , (void *) (insn[j].address + insn[j].size));
if (newline) {
/* follow each complete insn by a nice newline */
print("\n" );
}
}
cs_free(insn, count);
}
cs_close(&cs_handle);
return NULL;
}
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(vorverarbeitet am 2026-06-10)
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