mirror of
https://github.com/zeldaret/oot.git
synced 2024-12-26 22:56:20 +00:00
477 lines
15 KiB
C
477 lines
15 KiB
C
#include <ctype.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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//#include "opts.h"
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#include "util.h"
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#define ARRAY_COUNT(arr) (sizeof(arr) / sizeof(arr[0]))
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static FILE *fout;
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enum
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{
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STMT_address,
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STMT_align,
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STMT_beginseg,
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STMT_endseg,
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STMT_entry,
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STMT_flags,
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STMT_include,
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STMT_name,
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STMT_romalign,
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STMT_stack,
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STMT_increment,
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};
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enum
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{
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FLAG_BOOT = (1 << 0),
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FLAG_OBJECT = (1 << 1),
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FLAG_RAW = (1 << 2),
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};
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struct Segment
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{
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uint32_t fields;
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char *name;
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uint32_t flags;
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uint32_t address;
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uint32_t stack;
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uint32_t align;
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uint32_t romalign;
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uint32_t increment;
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uint32_t entry;
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char **includes;
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int includesCount;
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};
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static struct Segment *g_segments = NULL;
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static int g_segmentsCount = 0;
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static struct Segment *add_segment(void)
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{
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struct Segment *seg;
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g_segmentsCount++;
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g_segments = realloc(g_segments, g_segmentsCount * sizeof(*g_segments));
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seg = &g_segments[g_segmentsCount - 1];
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memset(seg, 0, sizeof(*seg));
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seg->align = 16;
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return seg;
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}
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static char *skip_whitespace(char *str)
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{
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while (isspace(*str))
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str++;
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return str;
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}
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// null terminates the current token and returns a pointer to the next token
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static char *token_split(char *str)
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{
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while (!isspace(*str))
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{
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if (*str == 0)
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return str; // end of string
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str++;
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}
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*str = 0; // terminate token
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str++;
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return skip_whitespace(str);
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}
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// null terminates the current line and returns a pointer to the next line
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static char *line_split(char *str)
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{
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while (*str != '\n')
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{
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if (*str == 0)
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return str; // end of string
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str++;
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}
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*str = 0; // terminate line
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return str + 1;
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}
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static bool parse_number(const char *str, unsigned int *num)
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{
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char *endptr;
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long int n = strtol(str, &endptr, 0);
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*num = n;
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return endptr > str;
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}
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static bool parse_flags(char *str, unsigned int *flags)
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{
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unsigned int f = 0;
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while (str[0] != 0)
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{
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char *next = token_split(str);
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if (strcmp(str, "BOOT") == 0)
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f |= FLAG_BOOT;
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else if (strcmp(str, "OBJECT") == 0)
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f |= FLAG_OBJECT;
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else if (strcmp(str, "RAW") == 0)
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f |= FLAG_RAW;
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else
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return false;
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str = next;
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}
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*flags = f;
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return true;
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}
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static bool parse_quoted_string(char *str, char **out)
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{
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if (*str != '"')
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return false;
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str++;
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*out = str;
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while (*str != '"')
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{
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if (*str == 0)
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return false; // unterminated quote
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str++;
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}
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*str = 0;
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str++;
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str = skip_whitespace(str);
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if (*str != 0)
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return false; // garbage after filename
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return true;
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}
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static bool is_pow_of_2(unsigned int n)
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{
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return (n & (n - 1)) == 0;
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}
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static const char *const stmtNames[] =
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{
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[STMT_address] = "address",
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[STMT_align] = "align",
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[STMT_beginseg] = "beginseg",
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[STMT_endseg] = "endseg",
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[STMT_entry] = "entry",
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[STMT_flags] = "flags",
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[STMT_include] = "include",
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[STMT_name] = "name",
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[STMT_romalign] = "romalign",
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[STMT_stack] = "stack",
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[STMT_increment] = "increment",
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};
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static void parse_rom_spec(char *spec)
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{
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int lineNum = 1;
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char *line = spec;
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struct Segment *currSeg = NULL;
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// iterate over lines
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while (line[0] != 0)
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{
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char *nextLine = line_split(line);
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if (line[0] != 0)
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{
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char *stmtName = skip_whitespace(line);
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char *args = token_split(stmtName);
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unsigned int stmt;
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for (stmt = 0; stmt < ARRAY_COUNT(stmtNames); stmt++)
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if (strcmp(stmtName, stmtNames[stmt]) == 0)
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goto got_stmt;
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util_fatal_error("line %i: unknown statement '%s'", lineNum, stmtName);
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got_stmt:
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if (currSeg != NULL)
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{
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// ensure no duplicates (except for 'include')
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if (stmt != STMT_include && (currSeg->fields & (1 << stmt)))
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util_fatal_error("line %i: duplicate '%s' statement", lineNum, stmtName);
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currSeg->fields |= 1 << stmt;
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// statements valid within a segment definition
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switch (stmt)
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{
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case STMT_beginseg:
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util_fatal_error("line %i: '%s' inside of a segment definition", lineNum, stmtName);
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break;
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case STMT_endseg:
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// verify segment data
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if (currSeg->name == NULL)
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util_fatal_error("line %i: no name specified for segment", lineNum);
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if (currSeg->includesCount == 0)
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util_fatal_error("line %i: no includes specified for segment", lineNum);
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currSeg = NULL;
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break;
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case STMT_name:
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if (!parse_quoted_string(args, &currSeg->name))
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util_fatal_error("line %i: invalid name", lineNum);
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break;
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case STMT_address:
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if (!parse_number(args, &currSeg->address))
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util_fatal_error("line %i: expected number after 'address'", lineNum);
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break;
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case STMT_flags:
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if (!parse_flags(args, &currSeg->flags))
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util_fatal_error("line %i: invalid flags", lineNum);
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break;
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case STMT_align:
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if (!parse_number(args, &currSeg->align))
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util_fatal_error("line %i: expected number after 'align'", lineNum);
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if (!is_pow_of_2(currSeg->align))
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util_fatal_error("line %i: alignment is not a power of two", lineNum);
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break;
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case STMT_include:
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currSeg->includesCount++;
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currSeg->includes = realloc(currSeg->includes, currSeg->includesCount * sizeof(*currSeg->includes));
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if (!parse_quoted_string(args, &currSeg->includes[currSeg->includesCount - 1]))
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util_fatal_error("line %i: invalid filename", lineNum);
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break;
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case STMT_romalign:
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if (!parse_number(args, &currSeg->romalign))
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util_fatal_error("line %i: expected number after 'romalign'", lineNum);
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if (!is_pow_of_2(currSeg->romalign))
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util_fatal_error("line %i: alignment is not a power of two", lineNum);
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break;
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case STMT_increment:
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if (!parse_number(args, &currSeg->increment))
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util_fatal_error("line %i: expected number after 'increment'", lineNum);
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//if (!is_pow_of_2(currSeg->romalign))
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//util_fatal_error("line %i: alignment is not a power of two", lineNum);
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break;
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default:
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fprintf(stderr, "warning: '%s' is not implemented\n", stmtName);
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break;
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}
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}
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else
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{
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// commands valid outside a segment definition
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switch (stmt)
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{
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case STMT_beginseg:
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currSeg = add_segment();
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break;
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case STMT_endseg:
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util_fatal_error("line %i: '%s' outside of a segment definition", lineNum, stmtName);
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break;
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default:
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fprintf(stderr, "warning: '%s' is not implemented\n", stmtName);
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break;
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}
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}
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}
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line = nextLine;
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lineNum++;
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}
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}
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static void write_ld_script(void)
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{
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int i;
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int j;
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fputs("SECTIONS {\n"
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" _RomSize = 0;\n"
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" _RomStart = _RomSize;\n\n",
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fout);
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for (i = 0; i < g_segmentsCount; i++)
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{
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const struct Segment *seg = &g_segments[i];
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// align start of ROM segment
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if (seg->fields & (1 << STMT_romalign))
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fprintf(fout, " _RomSize = (_RomSize + %i) & ~ %i;\n", seg->romalign - 1, seg->romalign - 1);
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// initialized data (.text, .data, .rodata, .sdata)
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// Increment the start of the section
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//if (seg->fields & (1 << STMT_increment))
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//fprintf(fout, " . += 0x%08X;\n", seg->increment);
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fprintf(fout, " _%sSegmentRomStart = _RomSize;\n"
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" ..%s ", seg->name, seg->name);
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if (seg->address != 0)
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{
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fprintf(fout, "0x%08X ", seg->address);
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}
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// (AT(_RomSize) isn't necessary, but adds useful "load address" lines to the map file)
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fprintf(fout, ": AT(_RomSize)\n {\n"
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" _%sSegmentStart = .;\n"
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" . = ALIGN(0x10);\n"
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" _%sSegmentTextStart = .;\n",
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seg->name, seg->name);
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if (seg->fields & (1 << STMT_align))
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fprintf(fout, " . = ALIGN(0x%X);\n", seg->align);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.text)\n", seg->includes[j]);
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fprintf(fout, " _%sSegmentTextEnd = .;\n", seg->name);
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fprintf(fout, " _%sSegmentTextSize = ABSOLUTE( _%sSegmentTextEnd - _%sSegmentTextStart );\n", seg->name, seg->name, seg->name);
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fprintf(fout, " _%sSegmentDataStart = .;\n", seg->name);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.data)\n", seg->includes[j]);
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/*
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.rodata)\n", seg->includes[j]);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.sdata)\n", seg->includes[j]);
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*/
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//fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentDataEnd = .;\n", seg->name);
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fprintf(fout, " _%sSegmentDataSize = ABSOLUTE( _%sSegmentDataEnd - _%sSegmentDataStart );\n", seg->name, seg->name, seg->name);
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fprintf(fout, " _%sSegmentRoDataStart = .;\n", seg->name);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.rodata)\n", seg->includes[j]);
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//fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentRoDataEnd = .;\n", seg->name);
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fprintf(fout, " _%sSegmentRoDataSize = ABSOLUTE( _%sSegmentRoDataEnd - _%sSegmentRoDataStart );\n", seg->name, seg->name, seg->name);
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fprintf(fout, " _%sSegmentSDataStart = .;\n", seg->name);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.sdata)\n", seg->includes[j]);
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fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentSDataEnd = .;\n", seg->name);
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fprintf(fout, " _%sSegmentOvlStart = .;\n", seg->name);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.ovl)\n", seg->includes[j]);
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fprintf(fout, " . = ALIGN(0x10);\n");
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fprintf(fout, " _%sSegmentOvlEnd = .;\n", seg->name);
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if (seg->fields & (1 << STMT_increment))
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fprintf(fout, " . += 0x%08X;\n", seg->increment);
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fputs(" }\n", fout);
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//fprintf(fout, " _RomSize += ( _%sSegmentDataEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
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fprintf(fout, " _RomSize += ( _%sSegmentOvlEnd - _%sSegmentTextStart );\n", seg->name, seg->name);
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fprintf(fout, " _%sSegmentRomEnd = _RomSize;\n\n", seg->name);
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// algn end of ROM segment
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if (seg->fields & (1 << STMT_romalign))
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fprintf(fout, " _RomSize = (_RomSize + %i) & ~ %i;\n", seg->romalign - 1, seg->romalign - 1);
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// uninitialized data (.sbss, .scommon, .bss, COMMON)
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fprintf(fout, " ..%s.bss ADDR(..%s) + SIZEOF(..%s) (NOLOAD) :\n"
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/*" ..%s.bss :\n"*/
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" {\n"
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" . = ALIGN(0x10);\n"
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" _%sSegmentBssStart = .;\n",
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seg->name, seg->name, seg->name, seg->name);
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if (seg->fields & (1 << STMT_align))
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fprintf(fout, " . = ALIGN(0x%X);\n", seg->align);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.sbss)\n", seg->includes[j]);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.scommon)\n", seg->includes[j]);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (.bss)\n", seg->includes[j]);
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for (j = 0; j < seg->includesCount; j++)
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fprintf(fout, " %s (COMMON)\n", seg->includes[j]);
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fprintf(fout, " . = ALIGN(0x10);\n"
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" _%sSegmentBssEnd = .;\n"
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" _%sSegmentEnd = .;\n"
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" }\n"
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" _%sSegmentBssSize = ABSOLUTE( _%sSegmentBssEnd - _%sSegmentBssStart );\n\n",
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seg->name, seg->name, seg->name, seg->name, seg->name);
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// Increment the end of the segment
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//if (seg->fields & (1 << STMT_increment))
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//fprintf(fout, " . += 0x%08X;\n", seg->increment);
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//fprintf(fout, " ..%s.ovl ADDR(..%s) + SIZEOF(..%s) :\n"
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// /*" ..%s.bss :\n"*/
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// " {\n",
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// seg->name, seg->name, seg->name);
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//fprintf(fout, " _%sSegmentOvlStart = .;\n", seg->name);
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//for (j = 0; j < seg->includesCount; j++)
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// fprintf(fout, " %s (.ovl)\n", seg->includes[j]);
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////fprintf(fout, " . = ALIGN(0x10);\n");
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//fprintf(fout, " _%sSegmentOvlEnd = .;\n", seg->name);
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//fprintf(fout, "\n }\n");
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}
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fputs(" _RomEnd = _RomSize;\n}\n", fout);
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}
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static void usage(const char *execname)
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{
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fprintf(stderr, "Nintendo 64 linker script generation tool v0.01\n"
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"usage: %s SPEC_FILE LD_SCRIPT\n"
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"SPEC_FILE file describing the organization of object files into segments\n"
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"LD_SCRIPT filename of output linker script\n",
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execname);
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}
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int main(int argc, char **argv)
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{
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void *spec;
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size_t size;
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if (argc != 3)
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{
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usage(argv[0]);
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return 1;
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}
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spec = util_read_whole_file(argv[1], &size);
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parse_rom_spec(spec);
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fout = fopen(argv[2], "w");
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if (fout == NULL)
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util_fatal_error("failed to open file '%s' for writing", argv[2]);
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write_ld_script();
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free(spec);
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fclose(fout);
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return 0;
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}
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