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Splits disassembler from expdump, adds disassembler options. Adds better assembler interface, adds option for outputting the generated listings.

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This commit is contained in:
Felix Queißner 2016-07-01 09:06:55 +02:00
parent ae9ea08ef1
commit 1fec9927c1
6 changed files with 258 additions and 150 deletions
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2
libvm/Makefile
View file

@ -6,7 +6,7 @@ all: explink expdump emulator as
explink: explink.c explink: explink.c
$(CC) -g -o bin/$@ $^ $(CC) -g -o bin/$@ $^
expdump: expdump.c mnemonics.c expdump: expdump.c mnemonics.c disassembler.c
$(CC) -g -o bin/$@ $^ $(CC) -g -o bin/$@ $^
emulator: emulator.c vm.c emulator: emulator.c vm.c

2
libvm/as/Makefile
View file

@ -5,7 +5,7 @@
all: as all: as
as: as.c tokens.c ../mnemonics.c as: as.c tokens.c ../mnemonics.c ../disassembler.c
gcc -g -o ../bin/$@ $^ gcc -g -o ../bin/$@ $^
tokens.c: tokens.y tokens.c: tokens.y

100
libvm/as/as.c
View file

@ -11,6 +11,7 @@
#include "tokens.h" #include "tokens.h"
#include "../vm.h" #include "../vm.h"
#include "../mnemonics.h" #include "../mnemonics.h"
#include "../disassembler.h"
struct llist struct llist
{ {
@ -30,11 +31,14 @@ void list_insert(llist_t **list, const char *name, uint32_t value)
*list = item; *list = item;
} }
int listFound = 0;
uint32_t list_find(llist_t **list, const char *name) uint32_t list_find(llist_t **list, const char *name)
{ {
listFound = 0;
for(llist_t *it = *list; it != NULL; it = it->next) for(llist_t *it = *list; it != NULL; it = it->next)
{ {
if(strcmp(it->name, name) == 0) { if(strcmp(it->name, name) == 0) {
listFound = 1;
return it->value; return it->value;
} }
} }
@ -53,6 +57,8 @@ void list_free(llist_t **list)
FILE *output; FILE *output;
FILE *listing = NULL;
int listSymbols = 0; int listSymbols = 0;
int entryPoint = 0; int entryPoint = 0;
@ -105,6 +111,11 @@ void assemble()
list_insert(&labels, yytext, entryPoint); list_insert(&labels, yytext, entryPoint);
if(listing)
{
fprintf(listing, "%s:\n", yytext);
}
tok = yylex(); tok = yylex();
} }
if(tok != TOK_NEWLINE) if(tok != TOK_NEWLINE)
@ -127,7 +138,24 @@ void assemble()
exit(1); exit(1);
} }
else if(strcmp(mnemonics[i].name, yytext) == 0) { else if(strcmp(mnemonics[i].name, yytext) == 0) {
current = mnemonics[i].instr; // Copy instruction here, but account for
// already applied modificatiors by
// only copying when values still zero.
#define COPY_IF(prop) \
if(!current.prop) \
current.prop = mnemonics[i].instr.prop;
COPY_IF(execZ );
COPY_IF(execN);
COPY_IF(input0);
COPY_IF(input1);
COPY_IF(command);
COPY_IF(cmdinfo);
COPY_IF(flags);
COPY_IF(output);
COPY_IF(argument);
#undef COPY_IF
// current = mnemonics[i].instr;
break; break;
} }
} }
@ -136,6 +164,7 @@ void assemble()
apply_modifiers(&current); apply_modifiers(&current);
int reqPatch = 0;
if(tok != TOK_NEWLINE) if(tok != TOK_NEWLINE)
{ {
switch(tok) switch(tok)
@ -151,9 +180,16 @@ void assemble()
break; break;
case TOK_REFERENCE: case TOK_REFERENCE:
{ {
// insert patch here for deferred argument modification
// (yytext + 1) removes the leading @ // (yytext + 1) removes the leading @
list_insert(&patches, yytext + 1, entryPoint); // check if we already had a label with this name
uint32_t target = list_find(&labels, yytext + 1);
if(listFound)
current.argument = target;
else {
// insert patch here for deferred argument modification
list_insert(&patches, yytext + 1, entryPoint);
reqPatch = 1;
}
break; break;
} }
default: default:
@ -172,6 +208,13 @@ void assemble()
// write command: // write command:
fwrite(&current, sizeof(instruction_t), 1, output); fwrite(&current, sizeof(instruction_t), 1, output);
if(listing)
{
if(reqPatch) fprintf(listing, "\t; Requires patch:\n");
fprintf(listing, "\t", yytext);
disassemble(&current, 1, entryPoint, listing);
}
// Increase command index by one // Increase command index by one
entryPoint += 1; entryPoint += 1;
} }
@ -180,10 +223,14 @@ void assemble()
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
output = stdout; // configure disassembler:
disasmOptions.outputAddresses = false;
output = NULL;
listing = NULL;
int c; int c;
while ((c = getopt(argc, argv, "o:e:s")) != -1) while ((c = getopt(argc, argv, "o:e:sl:L")) != -1)
{ {
switch (c) switch (c)
{ {
@ -193,17 +240,32 @@ int main(int argc, char **argv)
case 's': case 's':
listSymbols = 1; listSymbols = 1;
break; break;
case 'L':
listing = stdout;
break;
case 'l':
{
if(listing != NULL) {
fprintf(stderr, "-L or -l can only be used mutual exclusive and only once.\n");
exit(1);
}
listing = fopen(optarg, "w");
if(listing == NULL) {
fprintf(stderr, "Could not open %s.\n");
exit(1);
}
}
case 'o': case 'o':
{ {
FILE *f = fopen(optarg, "wb"); if(output != NULL) {
if(f == NULL) { fprintf(stderr, "-o can be used only once.\n");
fprintf(stderr, "%f not found.\n", optarg); exit(1);
abort();
} }
if(output != stdout) { output = fopen(optarg, "wb");
fclose(output); if(output == NULL) {
fprintf(stderr, "%s not found.\n", optarg);
exit(1);
} }
output = f;
break; break;
} }
case '?': case '?':
@ -218,6 +280,13 @@ int main(int argc, char **argv)
abort(); abort();
} }
} }
if(output == NULL)
{
fprintf(stderr, "An output file must be given by -o fileName\n");
exit(1);
}
for (int index = optind; index < argc; index++) for (int index = optind; index < argc; index++)
{ {
FILE *f = fopen(argv[index], "r"); FILE *f = fopen(argv[index], "r");
@ -245,6 +314,11 @@ int main(int argc, char **argv)
for(llist_t *it = patches; it != NULL; it = it->next) for(llist_t *it = patches; it != NULL; it = it->next)
{ {
uint32_t target = list_find(&labels, it->name); uint32_t target = list_find(&labels, it->name);
if(listFound == 0)
{
fprintf(stderr, "Could not find label %s.\n", it->name);
exit(1);
}
// Seek to the target address // Seek to the target address
fseek(output, sizeof(instruction_t) * it->value + 4, SEEK_SET); fseek(output, sizeof(instruction_t) * it->value + 4, SEEK_SET);

145
libvm/disassembler.c Normal file
View file

@ -0,0 +1,145 @@
#include "disassembler.h"
#include "mnemonics.h"
#include <string.h>
#include <stdlib.h>
struct disassembler_options disasmOptions =
{
false,
true
};
static const char *commandStrings[] =
{
// VM_CMD_COPY 0
"copy",
// VM_CMD_STORE 1
"store",
// VM_CMD_LOAD 2
"load",
// VM_CMD_GET 3
"get",
// VM_CMD_SET 4
"set",
// VM_CMD_BPGET 5
"bpget",
// VM_CMD_BPSET 6
"bpset",
// VM_CMD_CPGET 7
"cpget",
// VM_CMD_MATH 8
"math",
// VM_CMD_SPGET 9
"spget",
// VM_CMD_SPSET 10
"spset",
// VM_CMD_SYSCALL 11
"syscall",
// VM_CMD_HWIO 12
"hwio",
};
void disassemble(instruction_t *list, uint32_t count, uint32_t base, FILE *f)
{
bool v = disasmOptions.verbose;
for (int i = 0; i < count; i++)
{
instruction_t instr = list[i];
if(disasmOptions.outputAddresses)
fprintf(f, "%8X: ", base + i);
const mnemonic_t *knownInstruction = NULL;
for (int j = 0; mnemonics[j].name != NULL; j++)
{
if (memcmp(&instr, &mnemonics[j].instr, sizeof(instruction_t) - sizeof(uint32_t)) == 0) {
knownInstruction = &mnemonics[j];
break;
}
}
if (knownInstruction != NULL)
{
fprintf(f, "%s", knownInstruction->name);
if (instr.argument != 0 || instr.input0 == VM_INPUT_ARG)
{
if(instr.output == VM_OUTPUT_JUMP || instr.output == VM_OUTPUT_JUMPR)
fprintf(f, " 0x%X", instr.argument);
else
fprintf(f, " %d", instr.argument);
}
fprintf(f, "\n");
continue;
}
switch (instr.execN)
{
case VM_EXEC_0: fprintf(f, "[ex(n)=0] "); break;
case VM_EXEC_1: fprintf(f, "[ex(n)=1] "); break;
case VM_EXEC_X: if (v) fprintf(f, "[ex(n)=x] "); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
switch (instr.execZ)
{
case VM_EXEC_0: fprintf(f, "[ex(z)=0] "); break;
case VM_EXEC_1: fprintf(f, "[ex(z)=1] "); break;
case VM_EXEC_X: if (v) fprintf(f, "[ex(z)=x] "); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
switch (instr.input0)
{
case VM_INPUT_ZERO: if (v) fprintf(f, "[i0:zero] "); break;
case VM_INPUT_POP: fprintf(f, "[i0:pop] "); break;
case VM_INPUT_PEEK: fprintf(f, "[i0:peek] "); break;
case VM_INPUT_ARG: fprintf(f, "[i0:arg] "); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
switch (instr.input1)
{
case VM_INPUT_ZERO: if (v) fprintf(f, "[i1:zero] "); break;
case VM_INPUT_POP: fprintf(f, "[i1:pop] "); break;
// case VM_INPUT_PEEK: fprintf(f, "[i1:peek] "); break;
// case VM_INPUT_ARG: fprintf(f, "[i1:arg] "); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
if (instr.command <= 12)
fprintf(f, "%s", commandStrings[instr.command]);
else
fprintf(f, "undefined [cmd:%d]", instr.command);
if (instr.cmdinfo != 0)
{
fprintf(f, " [ci:%d]", instr.cmdinfo);
}
if (instr.argument != 0 || instr.input0 == VM_INPUT_ARG)
{
if (instr.output == VM_OUTPUT_JUMP || instr.output == VM_OUTPUT_JUMPR)
fprintf(f, " 0x%X", instr.argument);
else
fprintf(f, " %d", instr.argument);
}
switch (instr.flags)
{
case VM_FLAG_NO: if (v) fprintf(f, " [f:no]"); break;
case VM_FLAG_YES: fprintf(f, " [f:yes]"); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
switch (instr.output)
{
case VM_OUTPUT_DISCARD: fprintf(f, " [r:discard]"); break;
case VM_OUTPUT_JUMP: fprintf(f, " [r:jump]"); break;
case VM_OUTPUT_JUMPR: fprintf(f, " [r:jumpr]"); break;
case VM_OUTPUT_PUSH: fprintf(f, " [r:push]"); break;
default: fprintf(stderr, "Invalid code @%d\n", base + i); abort();
}
fprintf(f, "\n");
}
}

22
libvm/disassembler.h Normal file
View file

@ -0,0 +1,22 @@
#pragma once
#include "vm.h"
#include <stdio.h>
#include <stdbool.h>
struct disassembler_options
{
bool verbose;
bool outputAddresses;
};
// should the disassembler be more verbose?
extern struct disassembler_options disasmOptions;
// Disassembles a given list of instructions
void disassemble(
instruction_t *list, // Array with
uint32_t count, // count instructions.
uint32_t base, // The base instruction offset, "entry point"
FILE *f // The file where the disassembly should be printed.
);

137
libvm/expdump.c
View file

@ -7,6 +7,7 @@
#include "exp.h" #include "exp.h"
#include "vm.h" #include "vm.h"
#include "disassembler.h"
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
@ -22,140 +23,6 @@
#define DEBUG_VAL(x) fprintf(stderr, #x " = %d\n", x) #define DEBUG_VAL(x) fprintf(stderr, #x " = %d\n", x)
#include "mnemonics.h"
const char *commandStrings[] =
{
// VM_CMD_COPY 0
"copy",
// VM_CMD_STORE 1
"store",
// VM_CMD_LOAD 2
"load",
// VM_CMD_GET 3
"get",
// VM_CMD_SET 4
"set",
// VM_CMD_BPGET 5
"bpget",
// VM_CMD_BPSET 6
"bpset",
// VM_CMD_CPGET 7
"cpget",
// VM_CMD_MATH 8
"math",
// VM_CMD_SPGET 9
"spget",
// VM_CMD_SPSET 10
"spset",
// VM_CMD_SYSCALL 11
"syscall",
// VM_CMD_HWIO 12
"hwio",
};
int disassembleVerbose = 0;
void disassemble(instruction_t *list, uint32_t count, uint32_t base, FILE *f)
{
int v = disassembleVerbose;
for (int i = 0; i < count; i++)
{
instruction_t instr = list[i];
fprintf(f, "%8X: ", base + i);
const mnemonic_t *knownInstruction = NULL;
for (int j = 0; mnemonics[j].name != NULL; j++)
{
if (memcmp(&instr, &mnemonics[j].instr, sizeof(instruction_t) - sizeof(uint32_t)) == 0) {
knownInstruction = &mnemonics[j];
break;
}
}
if (knownInstruction != NULL)
{
fprintf(f, "%s", knownInstruction->name);
if (instr.argument != 0 || instr.input0 == VM_INPUT_ARG)
{
if(instr.output == VM_OUTPUT_JUMP || instr.output == VM_OUTPUT_JUMPR)
fprintf(f, " 0x%X", instr.argument);
else
fprintf(f, " %d", instr.argument);
}
fprintf(f, "\n");
continue;
}
switch (instr.execN)
{
case VM_EXEC_0: fprintf(f, "[ex(n)=0] "); break;
case VM_EXEC_1: fprintf(f, "[ex(n)=1] "); break;
case VM_EXEC_X: if (v) fprintf(f, "[ex(n)=x] "); break;
}
switch (instr.execZ)
{
case VM_EXEC_0: fprintf(f, "[ex(z)=0] "); break;
case VM_EXEC_1: fprintf(f, "[ex(z)=1] "); break;
case VM_EXEC_X: if (v) fprintf(f, "[ex(z)=x] "); break;
}
switch (instr.input0)
{
case VM_INPUT_ZERO: if (v) fprintf(f, "[i0:zero] "); break;
case VM_INPUT_POP: fprintf(f, "[i0:pop] "); break;
case VM_INPUT_PEEK: fprintf(f, "[i0:peek] "); break;
case VM_INPUT_ARG: fprintf(f, "[i0:arg] "); break;
}
switch (instr.input1)
{
case VM_INPUT_ZERO: if (v) fprintf(f, "[i1:zero] "); break;
case VM_INPUT_POP: fprintf(f, "[i1:pop] "); break;
// case VM_INPUT_PEEK: fprintf(f, "[i1:peek] "); break;
// case VM_INPUT_ARG: fprintf(f, "[i1:arg] "); break;
}
if (instr.command <= 12)
fprintf(f, "%s", commandStrings[instr.command]);
else
fprintf(f, "undefined [cmd:%d]", instr.command);
if (instr.cmdinfo != 0)
{
fprintf(f, " [ci:%d]", instr.cmdinfo);
}
if (instr.argument != 0 || instr.input0 == VM_INPUT_ARG)
{
if (instr.output == VM_OUTPUT_JUMP || instr.output == VM_OUTPUT_JUMPR)
fprintf(f, " 0x%X", instr.argument);
else
fprintf(f, " %d", instr.argument);
}
switch (instr.flags)
{
case VM_FLAG_NO: if (v) fprintf(f, " [f:no]"); break;
case VM_FLAG_YES: fprintf(f, " [f:yes]"); break;
}
switch (instr.output)
{
case VM_OUTPUT_DISCARD: if (v) fprintf(f, " [r:discard]"); break;
case VM_OUTPUT_JUMP: fprintf(f, " [r:jump]"); break;
case VM_OUTPUT_JUMPR: fprintf(f, " [r:jumpr]"); break;
case VM_OUTPUT_PUSH: fprintf(f, " [r:push]"); break;
}
fprintf(f, "\n");
}
}
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
opterr = 0; opterr = 0;
@ -173,7 +40,7 @@ int main(int argc, char **argv)
case 'H': headers = 1; break; case 'H': headers = 1; break;
case 's': dumpSections = 1; break; case 's': dumpSections = 1; break;
case 'm': dumpMetas = 1; break; case 'm': dumpMetas = 1; break;
case 'D': disassembleVerbose = 1; case 'D': disasmOptions.verbose = true;
case 'd': disassembleSections = 1; break; case 'd': disassembleSections = 1; break;
case '?': case '?':
if (optopt == 'o' || optopt == 'c' || optopt == 'd') if (optopt == 'o' || optopt == 'c' || optopt == 'd')