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-rw-r--r--arch/powerpc/kernel/entry_32.S16
-rw-r--r--arch/powerpc/kernel/entry_64.S16
-rw-r--r--arch/powerpc/kernel/misc.S7
-rw-r--r--arch/powerpc/kernel/misc_32.S33
-rw-r--r--arch/powerpc/kernel/misc_64.S34
-rw-r--r--arch/powerpc/kernel/ppc_ksyms.c1
-rw-r--r--arch/powerpc/kernel/process.c59
-rw-r--r--arch/powerpc/kernel/signal_32.c1
-rw-r--r--arch/powerpc/kernel/sys_ppc32.c22
9 files changed, 59 insertions, 130 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index af37528..9499385 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -435,6 +435,22 @@ ret_from_fork:
li r3,0
b ret_from_syscall
+ .globl ret_from_kernel_thread
+ret_from_kernel_thread:
+ REST_NVGPRS(r1)
+ bl schedule_tail
+ mtlr r14
+ mr r3,r15
+ PPC440EP_ERR42
+ blrl
+ li r3,0
+ b do_exit # no return
+
+ .globl __ret_from_kernel_execve
+__ret_from_kernel_execve:
+ addi r1,r3,-STACK_FRAME_OVERHEAD
+ b ret_from_syscall
+
/* Traced system call support */
syscall_dotrace:
SAVE_NVGPRS(r1)
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 0e931aa..56e0ff0 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -370,6 +370,22 @@ _GLOBAL(ret_from_fork)
li r3,0
b syscall_exit
+_GLOBAL(ret_from_kernel_thread)
+ bl .schedule_tail
+ REST_NVGPRS(r1)
+ REST_GPR(2,r1)
+ mtlr r14
+ mr r3,r15
+ blrl
+ li r3,0
+ b .do_exit # no return
+
+_GLOBAL(__ret_from_kernel_execve)
+ addi r1,r3,-STACK_FRAME_OVERHEAD
+ li r10,1
+ std r10,SOFTE(r1)
+ b syscall_exit
+
.section ".toc","aw"
DSCR_DEFAULT:
.tc dscr_default[TC],dscr_default
diff --git a/arch/powerpc/kernel/misc.S b/arch/powerpc/kernel/misc.S
index ba16874..7ce26d4 100644
--- a/arch/powerpc/kernel/misc.S
+++ b/arch/powerpc/kernel/misc.S
@@ -54,13 +54,6 @@ _GLOBAL(add_reloc_offset)
.align 3
2: PPC_LONG 1b
-_GLOBAL(kernel_execve)
- li r0,__NR_execve
- sc
- bnslr
- neg r3,r3
- blr
-
_GLOBAL(setjmp)
mflr r0
PPC_STL r0,0(r3)
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 407e293..19e096b 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -663,39 +663,6 @@ _GLOBAL(abs)
sub r3,r3,r4
blr
-/*
- * Create a kernel thread
- * kernel_thread(fn, arg, flags)
- */
-_GLOBAL(kernel_thread)
- stwu r1,-16(r1)
- stw r30,8(r1)
- stw r31,12(r1)
- mr r30,r3 /* function */
- mr r31,r4 /* argument */
- ori r3,r5,CLONE_VM /* flags */
- oris r3,r3,CLONE_UNTRACED>>16
- li r4,0 /* new sp (unused) */
- li r0,__NR_clone
- sc
- bns+ 1f /* did system call indicate error? */
- neg r3,r3 /* if so, make return code negative */
-1: cmpwi 0,r3,0 /* parent or child? */
- bne 2f /* return if parent */
- li r0,0 /* make top-level stack frame */
- stwu r0,-16(r1)
- mtlr r30 /* fn addr in lr */
- mr r3,r31 /* load arg and call fn */
- PPC440EP_ERR42
- blrl
- li r0,__NR_exit /* exit if function returns */
- li r3,0
- sc
-2: lwz r30,8(r1)
- lwz r31,12(r1)
- addi r1,r1,16
- blr
-
#ifdef CONFIG_SMP
_GLOBAL(start_secondary_resume)
/* Reset stack */
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S
index 565b786..5cfa800 100644
--- a/arch/powerpc/kernel/misc_64.S
+++ b/arch/powerpc/kernel/misc_64.S
@@ -407,40 +407,6 @@ _GLOBAL(scom970_write)
/*
- * Create a kernel thread
- * kernel_thread(fn, arg, flags)
- */
-_GLOBAL(kernel_thread)
- std r29,-24(r1)
- std r30,-16(r1)
- stdu r1,-STACK_FRAME_OVERHEAD(r1)
- mr r29,r3
- mr r30,r4
- ori r3,r5,CLONE_VM /* flags */
- oris r3,r3,(CLONE_UNTRACED>>16)
- li r4,0 /* new sp (unused) */
- li r0,__NR_clone
- sc
- bns+ 1f /* did system call indicate error? */
- neg r3,r3 /* if so, make return code negative */
-1: cmpdi 0,r3,0 /* parent or child? */
- bne 2f /* return if parent */
- li r0,0
- stdu r0,-STACK_FRAME_OVERHEAD(r1)
- ld r2,8(r29)
- ld r29,0(r29)
- mtlr r29 /* fn addr in lr */
- mr r3,r30 /* load arg and call fn */
- blrl
- li r0,__NR_exit /* exit after child exits */
- li r3,0
- sc
-2: addi r1,r1,STACK_FRAME_OVERHEAD
- ld r29,-24(r1)
- ld r30,-16(r1)
- blr
-
-/*
* disable_kernel_fp()
* Disable the FPU.
*/
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index 3e40315..19e4288 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -94,7 +94,6 @@ EXPORT_SYMBOL(pci_dram_offset);
#endif /* CONFIG_PCI */
EXPORT_SYMBOL(start_thread);
-EXPORT_SYMBOL(kernel_thread);
EXPORT_SYMBOL(giveup_fpu);
#ifdef CONFIG_ALTIVEC
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index d5ad666..ba48233 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -733,30 +733,39 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
extern unsigned long dscr_default; /* defined in arch/powerpc/kernel/sysfs.c */
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p,
+ unsigned long arg, struct task_struct *p,
struct pt_regs *regs)
{
struct pt_regs *childregs, *kregs;
extern void ret_from_fork(void);
+ extern void ret_from_kernel_thread(void);
+ void (*f)(void);
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
- CHECK_FULL_REGS(regs);
/* Copy registers */
sp -= sizeof(struct pt_regs);
childregs = (struct pt_regs *) sp;
- *childregs = *regs;
- if ((childregs->msr & MSR_PR) == 0) {
+ if (!regs) {
/* for kernel thread, set `current' and stackptr in new task */
+ memset(childregs, 0, sizeof(struct pt_regs));
childregs->gpr[1] = sp + sizeof(struct pt_regs);
-#ifdef CONFIG_PPC32
- childregs->gpr[2] = (unsigned long) p;
-#else
+#ifdef CONFIG_PPC64
+ childregs->gpr[14] = *(unsigned long *)usp;
+ childregs->gpr[2] = ((unsigned long *)usp)[1],
clear_tsk_thread_flag(p, TIF_32BIT);
+#else
+ childregs->gpr[14] = usp; /* function */
+ childregs->gpr[2] = (unsigned long) p;
#endif
+ childregs->gpr[15] = arg;
p->thread.regs = NULL; /* no user register state */
+ f = ret_from_kernel_thread;
} else {
+ CHECK_FULL_REGS(regs);
+ *childregs = *regs;
childregs->gpr[1] = usp;
p->thread.regs = childregs;
+ childregs->gpr[3] = 0; /* Result from fork() */
if (clone_flags & CLONE_SETTLS) {
#ifdef CONFIG_PPC64
if (!is_32bit_task())
@@ -765,8 +774,9 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
#endif
childregs->gpr[2] = childregs->gpr[6];
}
+
+ f = ret_from_fork;
}
- childregs->gpr[3] = 0; /* Result from fork() */
sp -= STACK_FRAME_OVERHEAD;
/*
@@ -805,19 +815,17 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
p->thread.dscr = current->thread.dscr;
}
#endif
-
/*
* The PPC64 ABI makes use of a TOC to contain function
* pointers. The function (ret_from_except) is actually a pointer
* to the TOC entry. The first entry is a pointer to the actual
* function.
- */
+ */
#ifdef CONFIG_PPC64
- kregs->nip = *((unsigned long *)ret_from_fork);
+ kregs->nip = *((unsigned long *)f);
#else
- kregs->nip = (unsigned long)ret_from_fork;
+ kregs->nip = (unsigned long)f;
#endif
-
return 0;
}
@@ -1055,26 +1063,13 @@ int sys_vfork(unsigned long p1, unsigned long p2, unsigned long p3,
regs, 0, NULL, NULL);
}
-int sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
- unsigned long a3, unsigned long a4, unsigned long a5,
- struct pt_regs *regs)
+void __ret_from_kernel_execve(struct pt_regs *normal)
+__noreturn;
+
+void ret_from_kernel_execve(struct pt_regs *normal)
{
- int error;
- char *filename;
-
- filename = getname((const char __user *) a0);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- flush_fp_to_thread(current);
- flush_altivec_to_thread(current);
- flush_spe_to_thread(current);
- error = do_execve(filename,
- (const char __user *const __user *) a1,
- (const char __user *const __user *) a2, regs);
- putname(filename);
-out:
- return error;
+ set_thread_flag(TIF_RESTOREALL);
+ __ret_from_kernel_execve(normal);
}
static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 8b4c049..804e323 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -35,7 +35,6 @@
#include <linux/stddef.h>
#include <linux/tty.h>
#include <linux/binfmts.h>
-#include <linux/freezer.h>
#endif
#include <asm/uaccess.h>
diff --git a/arch/powerpc/kernel/sys_ppc32.c b/arch/powerpc/kernel/sys_ppc32.c
index abd1112..9c2ed90 100644
--- a/arch/powerpc/kernel/sys_ppc32.c
+++ b/arch/powerpc/kernel/sys_ppc32.c
@@ -156,28 +156,6 @@ asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
(off_t __user *)offset, count);
}
-long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
- unsigned long a3, unsigned long a4, unsigned long a5,
- struct pt_regs *regs)
-{
- int error;
- char * filename;
-
- filename = getname((char __user *) a0);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- flush_fp_to_thread(current);
- flush_altivec_to_thread(current);
-
- error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
-
- putname(filename);
-
-out:
- return error;
-}
-
/* Note: it is necessary to treat option as an unsigned int,
* with the corresponding cast to a signed int to insure that the
* proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
generated by cgit v0.10.2 at 2024-10-30 11:09:25 (GMT)