1 files changed, 68 insertions, 0 deletions
diff --git a/src/libtrace/init_libtrace.c b/src/libtrace/init_libtrace.c
new file mode 100644
index 0000000..fb53721
--- /dev/null
+++ b/src/libtrace/init_libtrace.c
@@ -0,0 +1,68 @@
+#include <linux/elf.h>
+#include <hck/syscall.h>
+
+static int errno;
+
+void init_libtrace(void)
+{
+	unsigned long tmp[0];
+	unsigned long *stack = tmp;
+	int phnum=0, phent=0;
+	struct elf_phdr * phdr = NULL;
+	int i;
+	struct dynamic * dpnt;
+	struct elf32_sym * symtab = NULL;
+	void * strtab = NULL;
+
+/*
+ * When loading the interpreter, in linux/fs/binfmt_elf.h, the stack
+ * is filled with an auxiliary table defined in include/linux/elf.h;
+ * it has some important things such as pointers to the program
+ * headers.  We are trying to find that table.
+ *
+ */
+	for(; (stack < (unsigned long *)(0xc0000000-256)); stack++) {
+		if ((stack[0]==3) && (stack[2]==4) && (stack[4]==5) && (stack[6]==6)) {
+			phdr = (struct elf_phdr *)stack[1];
+			phent = stack[3];
+			phnum = stack[5];
+			break;
+		}
+	}
+	if (!phdr) {
+		_sys_write(2,"No auxiliary table in stack?\n",29);
+		return;
+	}
+
+	for(i=0; i<phnum; i++) {
+		if (phdr->p_type == PT_DYNAMIC) {
+			break;
+		}
+		phdr = (struct elf_phdr *)((void*)phdr + phent);
+	}
+	if (!phdr || phdr->p_type != PT_DYNAMIC) {
+		_sys_write(2,"No .dynamic in file?\n",21);
+		return;
+	}
+	dpnt = (struct dynamic *)phdr->p_vaddr;
+
+	while(dpnt->d_tag) {
+		if (dpnt->d_tag == DT_SYMTAB) {
+			symtab = (struct elf32_sym *) dpnt->d_un.d_ptr;
+		}
+		if (dpnt->d_tag == DT_STRTAB) {
+			strtab = (void *) dpnt->d_un.d_ptr;
+		}
+		dpnt++;
+	}
+	if (!symtab) {
+		_sys_write(2, "No .symtab?\n",12);
+		return;
+	}
+	if (!strtab) {
+		_sys_write(2, "No .strtab?\n",12);
+		return;
+	}
+
+	_sys_write(2,"Hola\n",5);
+}