patch-2.4.21 linux-2.4.21/arch/x86_64/ia32/ia32_binfmt.c

• Lines: 46
• Date: 2003-06-13 07:51:32.000000000 -0700
• Orig file: linux-2.4.20/arch/x86_64/ia32/ia32_binfmt.c
• Orig date: 2002-11-28 15:53:12.000000000 -0800

diff -urN linux-2.4.20/arch/x86_64/ia32/ia32_binfmt.c linux-2.4.21/arch/x86_64/ia32/ia32_binfmt.c
@@ -25,7 +25,9 @@
 
 #define IA32_EMULATOR 1
 
-#define IA32_PAGE_OFFSET 0xFFFFF000
+#define ELF_NAME "elf/i386"
+
+#define IA32_PAGE_OFFSET 0xFFFFe000
 #define IA32_STACK_TOP IA32_PAGE_OFFSET
 #define ELF_ET_DYN_BASE		(IA32_PAGE_OFFSET/3 + 0x1000000)
 
@@ -163,11 +165,13 @@
 #define ELF_PLAT_INIT(r)		elf32_init(r)
 #define setup_arg_pages(bprm)		ia32_setup_arg_pages(bprm)
 
+extern void load_gs_index(unsigned);
+
 #undef start_thread
 #define start_thread(regs,new_rip,new_rsp) do { \
-	__asm__("movl %0,%%fs": :"r" (0)); \
-	__asm__("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
-	wrmsrl(MSR_KERNEL_GS_BASE, 0); \
+	asm volatile("movl %0,%%fs": :"r" (0)); \
+	load_gs_index(0);	\
+	asm volatile("movl %0,%%es; movl %0,%%ds": :"r" (__USER32_DS)); \
 	(regs)->rip = (new_rip); \
 	(regs)->rsp = (new_rsp); \
 	(regs)->eflags = 0x200; \
@@ -203,6 +207,8 @@
 	regs->rax = 0;
 	regs->rbx = 0; 
 	regs->rbp = 0; 
+	regs->r8 = regs->r9 = regs->r10 = regs->r11 = regs->r12 = regs->r13 =
+		regs->r14 = regs->r15 = 0;	
 	me->thread.fs = 0; 
 	me->thread.gs = 0;
 	me->thread.fsindex = 0; 
@@ -237,7 +243,7 @@
 		mpnt->vm_mm = current->mm;
 		mpnt->vm_start = PAGE_MASK & (unsigned long) bprm->p;
 		mpnt->vm_end = IA32_STACK_TOP;
-		mpnt->vm_page_prot = PAGE_COPY;
+		mpnt->vm_page_prot = PAGE_COPY_EXEC;
 		mpnt->vm_flags = VM_STACK_FLAGS;
 		mpnt->vm_ops = NULL;
 		mpnt->vm_pgoff = 0;