Changeset ae84e38 in mainline

Timestamp:

2018-04-10T18:51:14Z (7 years ago)

Author:

Jiří Zárevúcky <jiri.zarevucky@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

ad0d1f5

Parents:

20287223

Message:

Remove _gp from sparc linker script.

The global pointer is set by each PIC function individually,
so the value loaded to %l7 here is never used.
Especially if libc is shared library, since then the GOT
of main has a different address than the GOT of the main
executable (if there even is one).

Location:

uspace/lib/c/arch/sparc64

Files:

• _link.ld.in (modified) (1 diff)
• src/entry.S (modified) (1 diff)
• src/thread_entry.S (modified) (1 diff)

uspace/lib/c/arch/sparc64/_link.ld.in

@@ -28 +28 @@
 
         .got : {
-                 _gp = .;
                  *(.got*);
         } :data

uspace/lib/c/arch/sparc64/src/entry.S

@@ -47 +47 @@
 
         # Pass pcb_ptr as the first argument to __main()
+        call __main
         mov %i1, %o0
-        sethi %hi(_gp), %l7
-        call __main
-        or %l7, %lo(_gp), %l7

uspace/lib/c/arch/sparc64/src/thread_entry.S

@@ -45 +45 @@
         # Propagate the input arguments to the new window.
         #
+
+        call __thread_main              ! %o0 contains address of uarg
         mov %i0, %o0
 
-        sethi %hi(_gp), %l7
-        call __thread_main              ! %o0 contains address of uarg
-        or %l7, %lo(_gp), %l7
-
         ! not reached