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oot/tools/mkldscript.c

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#include <ctype.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#include "opts.h"
#include "util.h"
#define ARRAY_COUNT(arr) (sizeof(arr) / sizeof(arr[0]))
static FILE *fout;
enum
{
STMT_address,
STMT_align,
STMT_beginseg,
STMT_endseg,
STMT_entry,
STMT_flags,
STMT_include,
STMT_name,
STMT_romalign,
STMT_stack,
STMT_increment,
};
enum
{
FLAG_BOOT = (1 << 0),
FLAG_OBJECT = (1 << 1),
FLAG_RAW = (1 << 2),
};
struct Segment
{
uint32_t fields;
char *name;
uint32_t flags;
uint32_t address;
uint32_t stack;
uint32_t align;
uint32_t romalign;
uint32_t increment;
uint32_t entry;
char **includes;
int includesCount;
};
static struct Segment *g_segments = NULL;
static int g_segmentsCount = 0;
static struct Segment *add_segment(void)
{
struct Segment *seg;
g_segmentsCount++;
g_segments = realloc(g_segments, g_segmentsCount * sizeof(*g_segments));
seg = &g_segments[g_segmentsCount - 1];
memset(seg, 0, sizeof(*seg));
seg->align = 16;
return seg;
}
static char *skip_whitespace(char *str)
{
while (isspace(*str))
str++;
return str;
}
// null terminates the current token and returns a pointer to the next token
static char *token_split(char *str)
{
while (!isspace(*str))
{
if (*str == 0)
return str; // end of string
str++;
}
*str = 0; // terminate token
str++;
return skip_whitespace(str);
}
// null terminates the current line and returns a pointer to the next line
static char *line_split(char *str)
{
while (*str != '\n')
{
if (*str == 0)
return str; // end of string
str++;
}
*str = 0; // terminate line
return str + 1;
}
static bool parse_number(const char *str, unsigned int *num)
{
char *endptr;
long int n = strtol(str, &endptr, 0);
*num = n;
return endptr > str;
}
static bool parse_flags(char *str, unsigned int *flags)
{
unsigned int f = 0;
while (str[0] != 0)
{
char *next = token_split(str);
if (strcmp(str, "BOOT") == 0)
f |= FLAG_BOOT;
else if (strcmp(str, "OBJECT") == 0)
f |= FLAG_OBJECT;
else if (strcmp(str, "RAW") == 0)
f |= FLAG_RAW;
else
return false;
str = next;
}
*flags = f;
return true;
}
static bool parse_quoted_string(char *str, char **out)
{
if (*str != '"')
return false;
str++;
*out = str;
while (*str != '"')
{
if (*str == 0)
return false; // unterminated quote
str++;
}
*str = 0;
str++;
str = skip_whitespace(str);
if (*str != 0)
return false; // garbage after filename
return true;
}
static bool is_pow_of_2(unsigned int n)
{
return (n & (n - 1)) == 0;
}
static const char *const stmtNames[] =
{
[STMT_address] = "address",
[STMT_align] = "align",
[STMT_beginseg] = "beginseg",
[STMT_endseg] = "endseg",
[STMT_entry] = "entry",
[STMT_flags] = "flags",
[STMT_include] = "include",
[STMT_name] = "name",
[STMT_romalign] = "romalign",
[STMT_stack] = "stack",
[STMT_increment] = "increment",
};
static void parse_rom_spec(char *spec)
{
int lineNum = 1;
char *line = spec;
struct Segment *currSeg = NULL;
// iterate over lines
while (line[0] != 0)
{
char *nextLine = line_split(line);
if (line[0] != 0)
{
char *stmtName = skip_whitespace(line);
char *args = token_split(stmtName);
unsigned int stmt;
for (stmt = 0; stmt < ARRAY_COUNT(stmtNames); stmt++)
if (strcmp(stmtName, stmtNames[stmt]) == 0)
goto got_stmt;
util_fatal_error("line %i: unknown statement '%s'", lineNum, stmtName);
got_stmt:
if (currSeg != NULL)
{
// ensure no duplicates (except for 'include')
if (stmt != STMT_include && (currSeg->fields & (1 << stmt)))
util_fatal_error("line %i: duplicate '%s' statement", lineNum, stmtName);
currSeg->fields |= 1 << stmt;
// statements valid within a segment definition
switch (stmt)
{
case STMT_beginseg:
util_fatal_error("line %i: '%s' inside of a segment definition", lineNum, stmtName);
break;
case STMT_endseg:
// verify segment data
if (currSeg->name == NULL)
util_fatal_error("line %i: no name specified for segment", lineNum);
if (currSeg->includesCount == 0)
util_fatal_error("line %i: no includes specified for segment", lineNum);
currSeg = NULL;
break;
case STMT_name:
if (!parse_quoted_string(args, &currSeg->name))
util_fatal_error("line %i: invalid name", lineNum);
break;
case STMT_address:
if (!parse_number(args, &currSeg->address))
util_fatal_error("line %i: expected number after 'address'", lineNum);
break;
case STMT_flags:
if (!parse_flags(args, &currSeg->flags))
util_fatal_error("line %i: invalid flags", lineNum);
break;
case STMT_align:
if (!parse_number(args, &currSeg->align))
util_fatal_error("line %i: expected number after 'align'", lineNum);
if (!is_pow_of_2(currSeg->align))
util_fatal_error("line %i: alignment is not a power of two", lineNum);
break;
case STMT_include:
currSeg->includesCount++;
currSeg->includes = realloc(currSeg->includes, currSeg->includesCount * sizeof(*currSeg->includes));
if (!parse_quoted_string(args, &currSeg->includes[currSeg->includesCount - 1]))
util_fatal_error("line %i: invalid filename", lineNum);
break;
case STMT_romalign:
if (!parse_number(args, &currSeg->romalign))
util_fatal_error("line %i: expected number after 'romalign'", lineNum);
if (!is_pow_of_2(currSeg->romalign))
util_fatal_error("line %i: alignment is not a power of two", lineNum);
break;
case STMT_increment:
if (!parse_number(args, &currSeg->increment))
util_fatal_error("line %i: expected number after 'increment'", lineNum);
//if (!is_pow_of_2(currSeg->romalign))
//util_fatal_error("line %i: alignment is not a power of two", lineNum);
break;
default:
fprintf(stderr, "warning: '%s' is not implemented\n", stmtName);
break;
}
}
else
{
// commands valid outside a segment definition
switch (stmt)
{
case STMT_beginseg:
currSeg = add_segment();
break;
case STMT_endseg:
util_fatal_error("line %i: '%s' outside of a segment definition", lineNum, stmtName);
break;
default:
fprintf(stderr, "warning: '%s' is not implemented\n", stmtName);
break;
}
}
}
line = nextLine;
lineNum++;
}
}
static void write_ld_script(void)
{
int i;
int j;
fputs("SECTIONS {\n"
" _RomSize = 0;\n"
" _RomStart = _RomSize;\n\n",
fout);
for (i = 0; i < g_segmentsCount; i++)
{
const struct Segment *seg = &g_segments[i];
// align start of ROM segment
if (seg->fields & (1 << STMT_romalign))
fprintf(fout, " _RomSize = (_RomSize + %i) & ~ %i;\n", seg->romalign - 1, seg->romalign - 1);
// initialized data (.text, .data, .rodata, .sdata)
// Increment the start of the section
//if (seg->fields & (1 << STMT_increment))
//fprintf(fout, " . += 0x%08X;\n", seg->increment);
fprintf(fout, " _%sSegmentRomStart = _RomSize;\n"
" ..%s ", seg->name, seg->name);
if (seg->address != 0)
{
fprintf(fout, "0x%08X ", seg->address);
}
// (AT(_RomSize) isn't necessary, but adds useful "load address" lines to the map file)
fprintf(fout, ": AT(_RomSize)\n {\n"
" _%sSegmentStart = .;\n"
" . = ALIGN(0x10);\n"
" _%sSegmentTextStart = .;\n",
seg->name, seg->name);
if (seg->fields & (1 << STMT_align))
fprintf(fout, " . = ALIGN(0x%X);\n", seg->align);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.text)\n", seg->includes[j]);
fprintf(fout, " _%sSegmentTextEnd = .;\n", seg->name);
fprintf(fout, " _%sSegmentTextSize = ABSOLUTE( _%sSegmentTextEnd - _%sSegmentTextStart );\n", seg->name, seg->name, seg->name);
fprintf(fout, " _%sSegmentDataStart = .;\n", seg->name);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.data)\n", seg->includes[j]);
/*
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.rodata)\n", seg->includes[j]);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.sdata)\n", seg->includes[j]);
*/
//fprintf(fout, " . = ALIGN(0x10);\n");
fprintf(fout, " _%sSegmentDataEnd = .;\n", seg->name);
fprintf(fout, " _%sSegmentDataSize = ABSOLUTE( _%sSegmentDataEnd - _%sSegmentDataStart );\n", seg->name, seg->name, seg->name);
fprintf(fout, " _%sSegmentRoDataStart = .;\n", seg->name);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.rodata)\n", seg->includes[j]);
//fprintf(fout, " . = ALIGN(0x10);\n");
fprintf(fout, " _%sSegmentRoDataEnd = .;\n", seg->name);
fprintf(fout, " _%sSegmentRoDataSize = ABSOLUTE( _%sSegmentRoDataEnd - _%sSegmentRoDataStart );\n", seg->name, seg->name, seg->name);
fprintf(fout, " _%sSegmentSDataStart = .;\n", seg->name);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.sdata)\n", seg->includes[j]);
fprintf(fout, " . = ALIGN(0x10);\n");
fprintf(fout, " _%sSegmentSDataEnd = .;\n", seg->name);
fprintf(fout, " _%sSegmentOvlStart = .;\n", seg->name);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.ovl)\n", seg->includes[j]);
fprintf(fout, " . = ALIGN(0x10);\n");
fprintf(fout, " _%sSegmentOvlEnd = .;\n", seg->name);
if (seg->fields & (1 << STMT_increment))
fprintf(fout, " . += 0x%08X;\n", seg->increment);
fputs(" }\n", fout);
//fprintf(fout, " _RomSize += ( _%sSegmentDataEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
fprintf(fout, " _RomSize += ( _%sSegmentOvlEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
fprintf(fout, " _%sSegmentRomEnd = _RomSize;\n\n", seg->name);
// algn end of ROM segment
if (seg->fields & (1 << STMT_romalign))
fprintf(fout, " _RomSize = (_RomSize + %i) & ~ %i;\n", seg->romalign - 1, seg->romalign - 1);
// uninitialized data (.sbss, .scommon, .bss, COMMON)
fprintf(fout, " ..%s.bss ADDR(..%s) + SIZEOF(..%s) (NOLOAD) :\n"
/*" ..%s.bss :\n"*/
" {\n"
" . = ALIGN(0x10);\n"
" _%sSegmentBssStart = .;\n",
seg->name, seg->name, seg->name, seg->name);
if (seg->fields & (1 << STMT_align))
fprintf(fout, " . = ALIGN(0x%X);\n", seg->align);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.sbss)\n", seg->includes[j]);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.scommon)\n", seg->includes[j]);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (.bss)\n", seg->includes[j]);
for (j = 0; j < seg->includesCount; j++)
fprintf(fout, " %s (COMMON)\n", seg->includes[j]);
fprintf(fout, " . = ALIGN(0x10);\n"
" _%sSegmentBssEnd = .;\n"
" _%sSegmentEnd = .;\n"
" }\n"
" _%sSegmentBssSize = ABSOLUTE( _%sSegmentBssEnd - _%sSegmentBssStart );\n\n",
seg->name, seg->name, seg->name, seg->name, seg->name);
// Increment the end of the segment
//if (seg->fields & (1 << STMT_increment))
//fprintf(fout, " . += 0x%08X;\n", seg->increment);
//fprintf(fout, " ..%s.ovl ADDR(..%s) + SIZEOF(..%s) :\n"
// /*" ..%s.bss :\n"*/
// " {\n",
// seg->name, seg->name, seg->name);
//fprintf(fout, " _%sSegmentOvlStart = .;\n", seg->name);
//for (j = 0; j < seg->includesCount; j++)
// fprintf(fout, " %s (.ovl)\n", seg->includes[j]);
////fprintf(fout, " . = ALIGN(0x10);\n");
//fprintf(fout, " _%sSegmentOvlEnd = .;\n", seg->name);
//fprintf(fout, "\n }\n");
}
fputs(" _RomEnd = _RomSize;\n}\n", fout);
}
static void usage(const char *execname)
{
fprintf(stderr, "Nintendo 64 linker script generation tool v0.01\n"
"usage: %s SPEC_FILE LD_SCRIPT\n"
"SPEC_FILE file describing the organization of object files into segments\n"
"LD_SCRIPT filename of output linker script\n",
execname);
}
int main(int argc, char **argv)
{
void *spec;
size_t size;
if (argc != 3)
{
usage(argv[0]);
return 1;
}
spec = util_read_whole_file(argv[1], &size);
parse_rom_spec(spec);
fout = fopen(argv[2], "w");
if (fout == NULL)
util_fatal_error("failed to open file '%s' for writing", argv[2]);
write_ld_script();
free(spec);
fclose(fout);
return 0;
}
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