[PATCH v3 1/1] loader: Make thread_ldt references position independent

[Alfred Agrell]

From: Alfred Agrell

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58666
---
 loader/preloader.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/loader/preloader.c b/loader/preloader.c
index d0551bae63a..d6833d8010c 100644
--- a/loader/preloader.c
+++ b/loader/preloader.c
@@ -208,11 +208,15 @@ extern char _end[];
 __ASM_GLOBAL_FUNC(_start,
                   __ASM_CFI("\t.cfi_undefined %eip\n")
                   "\tmovl $243,%eax\n"        /* SYS_set_thread_area */
-                  "\tmovl $thread_ldt,%ebx\n"
+                  "\tcall 1f\n"
+                  "1:\tpop %ebx\n"
+                  "\taddl $thread_ldt-1b,%ebx\n"
                   "\tint $0x80\n"             /* allocate gs segment */
                   "\torl %eax,%eax\n"
                   "\tjl 1f\n"
-                  "\tmovl thread_ldt,%eax\n"  /* thread_ldt.entry_number */
+                  "\tcall 2f\n"
+                  "2:\tpop %ebx\n"
+                  "\tmovl thread_ldt-2b(%ebx),%eax\n"  /* thread_ldt.entry_number */
                   "\tshl $3,%eax\n"
                   "\torl $3,%eax\n"
                   "\tmov %ax,%gs\n"