limine: Fix assignment of paths broken in 0431623

common/fs/file.h

@@ -9,8 +9,6 @@
 #  include <efi.h>
 #endif
 
-#define PATH_MAX 4096
-
 bool fs_get_guid(struct guid *guid, struct volume *part);
 char *fs_get_label(struct volume *part);
 
@@ -18,7 +16,7 @@ struct file_handle {
     bool       is_memfile;
     bool       readall;
     struct volume *vol;
-    char       path[PATH_MAX];
+    char      *path;
     void      *fd;
     void     (*read)(void *fd, void *buf, uint64_t loc, uint64_t count);
     void     (*close)(void *fd);

common/fs/file.s2.c

@@ -34,10 +34,18 @@ bool fs_get_guid(struct guid *guid, struct volume *part) {
 }
 
 struct file_handle *fopen(struct volume *part, const char *filename) {
-    if (strlen(filename) + 2 > PATH_MAX) {
-        panic(true, "fopen: Path too long");
+    size_t filename_new_len = strlen(filename) + 2;
+    char *filename_new = ext_mem_alloc(filename_new_len);
+
+    if (filename[0] != '/') {
+        filename_new[0] = '/';
+        strcpy(&filename_new[1], filename);
+    } else {
+        strcpy(filename_new, filename);
     }
 
+    filename = filename_new;
+
     struct file_handle *ret;
 
 #if bios == 1
@@ -45,24 +53,29 @@ struct file_handle *fopen(struct volume *part, const char *filename) {
         if ((ret = tftp_open(0, 69, filename)) == NULL) {
             return NULL;
         }
-        return ret;
+        goto success;
     }
 #endif
 
     if ((ret = ext2_open(part, filename)) != NULL) {
-        return ret;
+        goto success;
     }
     if ((ret = fat32_open(part, filename)) != NULL) {
-        return ret;
+        goto success;
     }
     if ((ret = iso9660_open(part, filename)) != NULL) {
-        return ret;
+        goto success;
     }
     if ((ret = ntfs_open(part, filename)) != NULL) {
-        return ret;
+        goto success;
     }
 
     return NULL;
+
+success:
+    ret->path = (char *)filename;
+
+    return ret;
 }
 
 void fclose(struct file_handle *fd) {

common/protos/limine.c

@@ -200,9 +200,7 @@ static struct limine_file get_file(struct file_handle *file, char *cmdline) {
         }
     }
 
-    char *path = ext_mem_alloc(strlen(file->path) + 1);
-    strcpy(path, file->path);
-    ret.path = reported_addr(path);
+    ret.path = reported_addr(file->path);
 
     ret.address = reported_addr(freadall(file, MEMMAP_KERNEL_AND_MODULES));
     ret.size = file->size;