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Diffstat (limited to 'libc/sysdeps/linux/sh/clone.S')
-rw-r--r--libc/sysdeps/linux/sh/clone.S135
1 files changed, 72 insertions, 63 deletions
diff --git a/libc/sysdeps/linux/sh/clone.S b/libc/sysdeps/linux/sh/clone.S
index 3d18b6dd0..bb566276a 100644
--- a/libc/sysdeps/linux/sh/clone.S
+++ b/libc/sysdeps/linux/sh/clone.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2000, 2003, 2004, 2007 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -20,93 +20,94 @@
and invokes a function in the right context after its all over. */
#include <features.h>
-#include <sys/syscall.h>
-#define _ERRNO_H
+#include <asm/unistd.h>
+#include <sysdep.h>
+#define _ERRNO_H 1
#include <bits/errno.h>
-#include <bits/sysnum.h>
-
-
-#ifdef __PIC__
-#define PLTJMP(_x) _x@PLT
-#else
-#define PLTJMP(_x) _x
+#ifdef RESET_PID
+#include <tcb-offsets.h>
#endif
+/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg,
+ pid_t *ptid, void *tls, pid_t *ctid); */
-
-/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */
-
- .text
-
-.text
-.align 4
-.type clone,@function
-.globl clone;
-clone:
+ .text
+ENTRY(__clone)
/* sanity check arguments. */
tst r4, r4
- bt 0f
- tst r5, r5
- bf/s 1f
- mov #+__NR_clone, r3
-0:
- bra __syscall_error
- mov #-EINVAL, r4
-
+ bt/s 0f
+ tst r5, r5
+ bf 1f
+0:
+ bra .Lsyscall_error
+ mov #-EINVAL,r0
1:
/* insert the args onto the new stack */
mov.l r7, @-r5
/* save the function pointer as the 0th element */
mov.l r4, @-r5
-
+
/* do the system call */
mov r6, r4
- trapa #(__SH_SYSCALL_TRAP_BASE + 2)
+ mov.l @r15, r6
+ mov.l @(8,r15), r7
+ mov.l @(4,r15), r0
+ mov #+SYS_ify(clone), r3
+ trapa #0x15
mov r0, r1
-#ifdef __sh2__
-/* 12 arithmetic shifts for the crappy sh2, because shad doesn't exist! */
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
- shar r1
-#else
mov #-12, r2
shad r2, r1
-#endif
- not r1, r1 /* r1=0 means r0 = -1 to -4095 */
- tst r1, r1 /* i.e. error in linux */
- bf/s 2f
- tst r0, r0
- bra __syscall_error
- mov r0, r4
-
-2:
- bt 3f
+ not r1, r1 // r1=0 means r0 = -1 to -4095
+ tst r1, r1 // i.e. error in linux
+ bf .Lclone_end
+.Lsyscall_error:
+ SYSCALL_ERROR_HANDLER
+.Lclone_end:
+ tst r0, r0
+ bt 2f
+.Lpseudo_end:
rts
nop
+2:
+ /* terminate the stack frame */
+ mov #0, r14
+#ifdef RESET_PID
+ mov r4, r0
+ shlr16 r0
+ tst #1, r0 // CLONE_THREAD = (1 << 16)
+ bf/s 4f
+ mov r4, r0
+ /* new pid */
+ shlr8 r0
+ tst #1, r0 // CLONE_VM = (1 << 8)
+ bf/s 3f
+ mov #-1, r0
+ mov #+SYS_ify(getpid), r3
+ trapa #0x15
3:
+ stc gbr, r1
+ mov.w .Lpidoff, r2
+ add r1, r2
+ mov.l r0, @r2
+ mov.w .Ltidoff, r2
+ add r1, r2
+ mov.l r0, @r2
+4:
+#endif
/* thread starts */
mov.l @r15, r1
jsr @r1
mov.l @(4,r15), r4
/* we are done, passing the return value through r0 */
- mov.l .L1, r1
-#ifdef __PIC__
+ mov.l .L3, r1
+#ifdef SHARED
mov.l r12, @-r15
sts.l pr, @-r15
mov r0, r4
- mova .LG, r0 /* .LG from syscall_error.S */
+ mova .LG, r0
mov.l .LG, r12
add r0, r12
- mova .L1, r0
+ mova .L3, r0
add r0, r1
jsr @r1
nop
@@ -118,8 +119,16 @@ clone:
mov r0, r4
#endif
.align 2
-.L1:
- .long PLTJMP( HIDDEN_JUMPTARGET(_exit))
-.size clone,.-clone;
+.LG:
+ .long _GLOBAL_OFFSET_TABLE_
+.L3:
+ .long PLTJMP(C_SYMBOL_NAME(_exit))
+#ifdef RESET_PID
+.Lpidoff:
+ .word PID - TLS_PRE_TCB_SIZE
+.Ltidoff:
+ .word TID - TLS_PRE_TCB_SIZE
+#endif
+PSEUDO_END (__clone)
-#include "syscall_error.S"
+weak_alias (__clone, clone)