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-rw-r--r--410user/exec2obj.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/410user/exec2obj.c b/410user/exec2obj.c
new file mode 100644
index 0000000..80c1a57
--- /dev/null
+++ b/410user/exec2obj.c
@@ -0,0 +1,208 @@
+#include "410kern/inc/exec2obj.h"
+#include <stdio.h>
+#include <string.h>
+
+#define STABS 0
+
+void print_usage() {
+ fprintf(stderr, "Usage: exec2obj <file>...\n");
+ fprintf(stderr, "Creates a .s file containing a const char array for each file\n");
+ fprintf(stderr, "given as an argument. Each array is initialized to the contents\n");
+ fprintf(stderr, "of that file. A table of contents is also created. Look at\n");
+ fprintf(stderr, "exec2obj.h for more information.\n\n");
+}
+
+char header[] =
+#if STABS
+"\t.file\t\"user_apps.c\"\n"
+"\t.stabs\t\"/home/gghartma/15-410/proj2/\",100,0,0,.Ltext0\n"
+"\t.stabs\t\"user_apps.c\",100,0,0,.Ltext0\n"
+#endif
+"\t.text\n"
+".Ltext0:\n"
+#if STABS
+"\t.stabs\t\"gcc2_compiled.\",60,0,0,0\n"
+"\t.stabs\t\"int:t(0,1)=r(0,1);-2147483648;2147483647;\",128,0,0,0\n"
+"\t.stabs\t\"char:t(0,2)=r(0,2);0;127;\",128,0,0,0\n"
+"\t.stabs\t\"long int:t(0,3)=r(0,3);-2147483648;2147483647;\",128,0,0,0\n"
+"\t.stabs\t\"unsigned int:t(0,4)=r(0,4);0000000000000;0037777777777;\",128,0,0,0\n"
+"\t.stabs\t\"long unsigned int:t(0,5)=r(0,5);0000000000000;0037777777777;\",128,0,0,0\n"
+"\t.stabs\t\"long long int:t(0,6)=@s64;r(0,6);01000000000000000000000;0777777777777777777777;\",128,0,0,0\n"
+"\t.stabs\t\"long long unsigned int:t(0,7)=@s64;r(0,7);0000000000000;01777777777777777777777;\",128,0,0,0\n"
+"\t.stabs\t\"short int:t(0,8)=@s16;r(0,8);-32768;32767;\",128,0,0,0\n"
+"\t.stabs\t\"short unsigned int:t(0,9)=@s16;r(0,9);0;65535;\",128,0,0,0\n"
+"\t.stabs\t\"signed char:t(0,10)=@s8;r(0,10);-128;127;\",128,0,0,0\n"
+"\t.stabs\t\"unsigned char:t(0,11)=@s8;r(0,11);0;255;\",128,0,0,0\n"
+"\t.stabs\t\"float:t(0,12)=r(0,1);4;0;\",128,0,0,0\n"
+"\t.stabs\t\"double:t(0,13)=r(0,1);8;0;\",128,0,0,0\n"
+"\t.stabs\t\"long double:t(0,14)=r(0,1);12;0;\",128,0,0,0\n"
+"\t.stabs\t\"complex int:t(0,15)=s8real:(0,1),0,32;imag:(0,1),32,32;;\",128,0,0,0\n"
+"\t.stabs\t\"complex float:t(0,16)=R3;8;0;\",128,0,0,0\n"
+"\t.stabs\t\"complex double:t(0,17)=R4;16;0;\",128,0,0,0\n"
+"\t.stabs\t\"complex long double:t(0,18)=R5;24;0;\",128,0,0,0\n"
+"\t.stabs\t\"void:t(0,19)=(0,19)\",128,0,0,0\n"
+"\t.stabs\t\"__builtin_va_list:t(0,20)=*(0,2)\",128,0,0,0\n"
+"\t.stabs\t\"_Bool:t(0,21)=@s8;-16\",128,0,0,0\n"
+"\t.stabs\t\"user_apps.c\",130,0,0,0\n"
+"\t.stabs\t\"410kern/lib/inc/exec2obj.h\",130,0,0,0\n"
+"\t.stabs\t\"exec2obj_userapp_TOC_entry:t(2,1)=(2,2)=s264execname:(2,3)=ar(2,4)=r(2,4);0000000000000;0037777777777;;0;255;(2,5)=k(0,2),0,2048;execbytes:(2,6)=*(2,5),2048,32;execlen:(0,1),2080,32;;\",128,0,21,0\n"
+"\t.stabn\t162,0,0,0\n"
+#endif
+"\t.section\t.rodata\n"
+ ;
+
+void emit_file_header(FILE *s, const char *file, int execsize)
+{
+ fprintf(s,".globl %s_exec2obj_userapp_code_ptr\n", file);
+ fprintf(s,"\t.align 32\n");
+ fprintf(s,"\t.type\t%s_exec2obj_userapp_code_ptr, @object\n", file);
+ fprintf(s,"\t.size\t%s_exec2obj_userapp_code_ptr, %d\n", file, execsize);
+ fprintf(s,"%s_exec2obj_userapp_code_ptr:\n", file);
+}
+
+int emit_file_bytes(FILE *out, FILE *in, int bytes)
+{
+ char line[1];
+ static const size_t sz = sizeof(line) / sizeof(line[0]);
+ while (1) {
+ size_t rval = fread(line, sizeof(line[0]), sz, in);
+ if (rval <= 0)
+ break;
+ bytes -= rval;
+ fprintf(out, "\t.byte\t%d", line[0]);
+ char *it = line + 1;
+ char *end = line + rval;
+ while (it != end) {
+ fprintf(out, ",%d", *it++);
+ }
+ fprintf(out, "\n");
+ }
+ return bytes;
+}
+
+void emit_dir_header(FILE *out, int nrfiles)
+{
+ fprintf(out, ".globl exec2obj_userapp_count\n"
+ "\t.align 4\n"
+ "\t.type\texec2obj_userapp_count, @object\n"
+ "\t.size\texec2obj_userapp_count, 4\n"
+ "exec2obj_userapp_count:\n");
+ fprintf(out, "\t.long\t%d\n", nrfiles);
+ fprintf(out, ".globl exec2obj_userapp_TOC\n"
+ "\t.align 32\n"
+ "\t.type\texec2obj_userapp_TOC, @object\n");
+ fprintf(out, "\t.size\texec2obj_userapp_TOC, %d\n", sizeof(exec2obj_userapp_TOC));
+ fprintf(out, "exec2obj_userapp_TOC:\n");
+}
+
+void emit_dir_entry(FILE *out, const char *name, int size)
+{
+ /* This is an awful hack, since we want the directory listing file
+ * named something that it can't be named on the host file system
+ * and can't appear in a symbol name. */
+ const char *listed_name =
+ (strcmp(name, "__DIR_LISTING__") == 0) ? "." : name;
+
+ fprintf(out, "\t.string\t\"%s\"\n", listed_name);
+ fprintf(out, "\t.zero\t%d\n", sizeof(exec2obj_userapp_TOC[0].execname) - strlen(listed_name) - 1);
+ fprintf(out, "\t.long\t%s_exec2obj_userapp_code_ptr\n", name);
+ fprintf(out, "\t.long\t%d\n", size);
+}
+
+
+void emit_dir_footer(FILE *out, int nrfiles)
+{
+ fprintf(out, "\t.zero\t%d\n",
+ sizeof(exec2obj_userapp_TOC) - nrfiles * sizeof(exec2obj_userapp_TOC[0]));
+ fprintf(out,
+#if STABS
+ "\t.stabs\t\"exec2obj_userapp_count:G(1,1)=k(0,1)\",32,0,8,0\n"
+ "\t.stabs\t\"exec2obj_userapp_TOC:G(1,2)=ar(2,4);0;127;(1,3)=k(2,1)\",32,0,9,0\n"
+ "\t.stabs\t\"idle_exec2obj_userapp_code_ptr:G(1,4)=ar(2,4);0;9574;(2,5)\",32,0,2,0\n"
+ "\t.stabs\t\"shell_exec2obj_userapp_code_ptr:G(1,5)=ar(2,4);0;39418;(2,5)\",32,0,4,0\n"
+ "\t.stabs\t\"init_exec2obj_userapp_code_ptr:G(1,6)=ar(2,4);0;21722;(2,5)\",32,0,6,0\n"
+#endif
+ "\t.text\n"
+#if STABS
+ "\t.stabs \"\",100,0,0,.Letext\n"
+#endif
+ ".Letext:\n"
+#if STABS
+ "\t.section\t.note.GNU-stack,\"\",@progbits\n"
+ "\t.ident\t\"GCC: (GNU) 3.3.5 (Debian 1:3.3.5-13)\"\n"
+#endif
+ );
+}
+
+#define MAX_FNAME 128
+
+int main(int argc, char** argv) {
+ FILE *in;
+ int execsize = 0;
+ int file_iter = 1;
+ int execsizes[MAX_NUM_APP_ENTRIES];
+
+ char fname_buf[MAX_FNAME];
+
+ /* If there are no executables specified it's an error. */
+ if (argc < 2) {
+ print_usage();
+ return -1;
+ }
+
+ if (argc > MAX_NUM_APP_ENTRIES + 1) {
+ fprintf(stderr, "Too many executables: The maximum is %d\n", MAX_NUM_APP_ENTRIES);
+ }
+
+ fwrite(header, sizeof(header[0]), sizeof(header) / sizeof(header[0]) - 1, stdout);
+
+ while (file_iter < argc) {
+
+ strncpy(fname_buf, argv[file_iter], MAX_FNAME);
+ strncat(fname_buf, ".strip", MAX_FNAME - strlen(fname_buf));
+
+ in = fopen(fname_buf,"r");
+ if (!in) {
+ fprintf(stderr, "Could not open %s for reading; falling back.\n",fname_buf);
+
+ /* Open the executable. */
+ in = fopen(argv[file_iter],"r");
+ if (!in) {
+ fprintf(stderr, "Could not open %s for reading.\n",argv[file_iter]);
+ printf("\n\n.abort\n\n");
+ return -1;
+ }
+ }
+
+ /* Find size of executable. */
+ fseek(in,0,SEEK_END);
+ execsize = ftell(in);
+ fseek(in,0,SEEK_SET);
+
+ execsizes[file_iter] = execsize;
+
+
+ /* Output the header of the file. */
+
+ emit_file_header(stdout, argv[file_iter], execsize);
+ emit_file_bytes(stdout, in, execsize);
+
+ fclose(in);
+
+ /* Move on to the next file. */
+ file_iter++;
+ }
+
+ emit_dir_header(stdout, argc-1);
+
+ /* Output the table of contents. */
+ file_iter = 1;
+
+ /* Output all other entries in TOC. */
+ while(file_iter < argc) {
+ emit_dir_entry(stdout, argv[file_iter], execsizes[file_iter]);
+ file_iter++;
+ }
+ emit_dir_footer(stdout, argc-1);
+ return 0;
+}
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