Merge commit '517ffce4e1a03aea979fe3a18a3dd1761a24fafb' into arch-sparc
Backmerge from the point in mainline where a trivial conflict had been
introduced (arch/sparc/kernel/sys_sparc_64.c had grown sys_kern_features()
right after where kernel_execve() used to be)
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index b6b442b..e52f3c2a 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -40,6 +40,8 @@
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
config SPARC32
def_bool !64BIT
diff --git a/arch/sparc/include/asm/processor_32.h b/arch/sparc/include/asm/processor_32.h
index f74ac9e..c1e0191 100644
--- a/arch/sparc/include/asm/processor_32.h
+++ b/arch/sparc/include/asm/processor_32.h
@@ -106,7 +106,6 @@
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while(0)
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
extern unsigned long get_wchan(struct task_struct *);
diff --git a/arch/sparc/include/asm/processor_64.h b/arch/sparc/include/asm/processor_64.h
index 4e5a483..0305d56 100644
--- a/arch/sparc/include/asm/processor_64.h
+++ b/arch/sparc/include/asm/processor_64.h
@@ -94,6 +94,7 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
+#include <asm/fpumacro.h>
/* Return saved PC of a blocked thread. */
struct task_struct;
@@ -143,6 +144,10 @@
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window) - STACK_BIAS), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
+ fprs_write(0); \
+ current_thread_info()->xfsr[0] = 0; \
+ current_thread_info()->fpsaved[0] = 0; \
+ regs->tstate &= ~TSTATE_PEF; \
} while (0)
#define start_thread32(regs, pc, sp) \
@@ -183,13 +188,15 @@
: \
: "r" (regs), "r" (sp - sizeof(struct reg_window32)), \
"i" ((const unsigned long)(&((struct pt_regs *)0)->u_regs[0]))); \
+ fprs_write(0); \
+ current_thread_info()->xfsr[0] = 0; \
+ current_thread_info()->fpsaved[0] = 0; \
+ regs->tstate &= ~TSTATE_PEF; \
} while (0)
/* Free all resources held by a thread. */
#define release_thread(tsk) do { } while (0)
-extern pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
extern unsigned long get_wchan(struct task_struct *task);
#define task_pt_regs(tsk) (task_thread_info(tsk)->kregs)
diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h
index da43bdc..bdfafd7 100644
--- a/arch/sparc/include/asm/ptrace.h
+++ b/arch/sparc/include/asm/ptrace.h
@@ -32,6 +32,9 @@
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
+#define current_pt_regs() \
+ ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
struct global_reg_snapshot {
unsigned long tstate;
unsigned long tpc;
@@ -55,9 +58,7 @@
extern union global_cpu_snapshot global_cpu_snapshot[NR_CPUS];
-#define force_successful_syscall_return() \
-do { current_thread_info()->syscall_noerror = 1; \
-} while (0)
+#define force_successful_syscall_return() set_thread_noerror(1)
#define user_mode(regs) (!((regs)->tstate & TSTATE_PRIV))
#define instruction_pointer(regs) ((regs)->tpc)
#define instruction_pointer_set(regs, val) ((regs)->tpc = (val))
@@ -100,6 +101,9 @@
#define arch_ptrace_stop(exit_code, info) \
synchronize_user_stack()
+#define current_pt_regs() \
+ ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+
#define user_mode(regs) (!((regs)->psr & PSR_PS))
#define instruction_pointer(regs) ((regs)->pc)
#define user_stack_pointer(regs) ((regs)->u_regs[UREG_FP])
diff --git a/arch/sparc/include/asm/switch_to_64.h b/arch/sparc/include/asm/switch_to_64.h
index 7923c4a..cad36f5 100644
--- a/arch/sparc/include/asm/switch_to_64.h
+++ b/arch/sparc/include/asm/switch_to_64.h
@@ -23,7 +23,7 @@
/* If you are tempted to conditionalize the following */ \
/* so that ASI is only written if it changes, think again. */ \
__asm__ __volatile__("wr %%g0, %0, %%asi" \
- : : "r" (__thread_flag_byte_ptr(task_thread_info(next))[TI_FLAG_BYTE_CURRENT_DS]));\
+ : : "r" (task_thread_info(next)->current_ds));\
trap_block[current_thread_info()->cpu].thread = \
task_thread_info(next); \
__asm__ __volatile__( \
diff --git a/arch/sparc/include/asm/syscalls.h b/arch/sparc/include/asm/syscalls.h
index 45a43f6..bf8972a 100644
--- a/arch/sparc/include/asm/syscalls.h
+++ b/arch/sparc/include/asm/syscalls.h
@@ -8,6 +8,4 @@
struct pt_regs *regs,
unsigned long stack_size);
-extern asmlinkage int sparc_execve(struct pt_regs *regs);
-
#endif /* _SPARC64_SYSCALLS_H */
diff --git a/arch/sparc/include/asm/thread_info_64.h b/arch/sparc/include/asm/thread_info_64.h
index a3fe4dc..269bd92 100644
--- a/arch/sparc/include/asm/thread_info_64.h
+++ b/arch/sparc/include/asm/thread_info_64.h
@@ -14,12 +14,12 @@
#define TI_FLAG_FAULT_CODE_SHIFT 56
#define TI_FLAG_BYTE_WSTATE 1
#define TI_FLAG_WSTATE_SHIFT 48
-#define TI_FLAG_BYTE_CWP 2
-#define TI_FLAG_CWP_SHIFT 40
-#define TI_FLAG_BYTE_CURRENT_DS 3
-#define TI_FLAG_CURRENT_DS_SHIFT 32
-#define TI_FLAG_BYTE_FPDEPTH 4
-#define TI_FLAG_FPDEPTH_SHIFT 24
+#define TI_FLAG_BYTE_NOERROR 2
+#define TI_FLAG_BYTE_NOERROR_SHIFT 40
+#define TI_FLAG_BYTE_FPDEPTH 3
+#define TI_FLAG_FPDEPTH_SHIFT 32
+#define TI_FLAG_BYTE_CWP 4
+#define TI_FLAG_CWP_SHIFT 24
#define TI_FLAG_BYTE_WSAVED 5
#define TI_FLAG_WSAVED_SHIFT 16
@@ -47,7 +47,7 @@
struct exec_domain *exec_domain;
int preempt_count; /* 0 => preemptable, <0 => BUG */
__u8 new_child;
- __u8 syscall_noerror;
+ __u8 current_ds;
__u16 cpu;
unsigned long *utraps;
@@ -74,9 +74,9 @@
#define TI_FAULT_CODE (TI_FLAGS + TI_FLAG_BYTE_FAULT_CODE)
#define TI_WSTATE (TI_FLAGS + TI_FLAG_BYTE_WSTATE)
#define TI_CWP (TI_FLAGS + TI_FLAG_BYTE_CWP)
-#define TI_CURRENT_DS (TI_FLAGS + TI_FLAG_BYTE_CURRENT_DS)
#define TI_FPDEPTH (TI_FLAGS + TI_FLAG_BYTE_FPDEPTH)
#define TI_WSAVED (TI_FLAGS + TI_FLAG_BYTE_WSAVED)
+#define TI_SYS_NOERROR (TI_FLAGS + TI_FLAG_BYTE_NOERROR)
#define TI_FPSAVED 0x00000010
#define TI_KSP 0x00000018
#define TI_FAULT_ADDR 0x00000020
@@ -84,7 +84,7 @@
#define TI_EXEC_DOMAIN 0x00000030
#define TI_PRE_COUNT 0x00000038
#define TI_NEW_CHILD 0x0000003c
-#define TI_SYS_NOERROR 0x0000003d
+#define TI_CURRENT_DS 0x0000003d
#define TI_CPU 0x0000003e
#define TI_UTRAPS 0x00000040
#define TI_REG_WINDOW 0x00000048
@@ -121,7 +121,7 @@
#define INIT_THREAD_INFO(tsk) \
{ \
.task = &tsk, \
- .flags = ((unsigned long)ASI_P) << TI_FLAG_CURRENT_DS_SHIFT, \
+ .current_ds = ASI_P, \
.exec_domain = &default_exec_domain, \
.preempt_count = INIT_PREEMPT_COUNT, \
.restart_block = { \
@@ -153,13 +153,12 @@
#define set_thread_wstate(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSTATE] = (val))
#define get_thread_cwp() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP])
#define set_thread_cwp(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CWP] = (val))
-#define get_thread_current_ds() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS])
-#define set_thread_current_ds(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_CURRENT_DS] = (val))
+#define get_thread_noerror() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR])
+#define set_thread_noerror(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_NOERROR] = (val))
#define get_thread_fpdepth() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH])
#define set_thread_fpdepth(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_FPDEPTH] = (val))
#define get_thread_wsaved() (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED])
#define set_thread_wsaved(val) (__cur_thread_flag_byte_ptr[TI_FLAG_BYTE_WSAVED] = (val))
-
#endif /* !(__ASSEMBLY__) */
/*
diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h
index 73083e1..e562d3c 100644
--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -38,14 +38,14 @@
#define VERIFY_READ 0
#define VERIFY_WRITE 1
-#define get_fs() ((mm_segment_t) { get_thread_current_ds() })
+#define get_fs() ((mm_segment_t){(current_thread_info()->current_ds)})
#define get_ds() (KERNEL_DS)
#define segment_eq(a,b) ((a).seg == (b).seg)
#define set_fs(val) \
do { \
- set_thread_current_ds((val).seg); \
+ current_thread_info()->current_ds =(val).seg; \
__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \
} while(0)
diff --git a/arch/sparc/include/asm/unistd.h b/arch/sparc/include/asm/unistd.h
index 0ecea6e..c3e5d8b 100644
--- a/arch/sparc/include/asm/unistd.h
+++ b/arch/sparc/include/asm/unistd.h
@@ -46,6 +46,7 @@
#define __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
#define __ARCH_WANT_COMPAT_SYS_SENDFILE
#endif
+#define __ARCH_WANT_SYS_EXECVE
/*
* "Conditional" syscalls
diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S
index dcaa1cf..21fd1a8 100644
--- a/arch/sparc/kernel/entry.S
+++ b/arch/sparc/kernel/entry.S
@@ -806,23 +806,10 @@
call c_sys_nis_syscall
mov %l5, %o7
- .align 4
- .globl sys_execve
-sys_execve:
- mov %o7, %l5
- add %sp, STACKFRAME_SZ, %o0 ! pt_regs *regs arg
- call sparc_execve
- mov %l5, %o7
-
- .globl sunos_execv
sunos_execv:
- st %g0, [%sp + STACKFRAME_SZ + PT_I2]
-
- call sparc_execve
- add %sp, STACKFRAME_SZ, %o0
-
- b ret_sys_call
- ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl sunos_execv
+ b sys_execve
+ clr %i2
.align 4
.globl sys_sparc_pipe
@@ -959,17 +946,9 @@
.align 4
linux_sparc_ni_syscall:
sethi %hi(sys_ni_syscall), %l7
- b syscall_is_too_hard
+ b do_syscall
or %l7, %lo(sys_ni_syscall), %l7
-linux_fast_syscall:
- andn %l7, 3, %l7
- mov %i0, %o0
- mov %i1, %o1
- mov %i2, %o2
- jmpl %l7 + %g0, %g0
- mov %i3, %o3
-
linux_syscall_trace:
add %sp, STACKFRAME_SZ, %o0
call syscall_trace
@@ -991,6 +970,23 @@
b ret_sys_call
ld [%sp + STACKFRAME_SZ + PT_I0], %o0
+ .globl ret_from_kernel_thread
+ret_from_kernel_thread:
+ call schedule_tail
+ ld [%g3 + TI_TASK], %o0
+ ld [%sp + STACKFRAME_SZ + PT_G1], %l0
+ call %l0
+ ld [%sp + STACKFRAME_SZ + PT_G2], %o0
+ rd %psr, %l1
+ ld [%sp + STACKFRAME_SZ + PT_PSR], %l0
+ andn %l0, PSR_CWP, %l0
+ nop
+ and %l1, PSR_CWP, %l1
+ or %l0, %l1, %l0
+ st %l0, [%sp + STACKFRAME_SZ + PT_PSR]
+ b ret_sys_call
+ mov 0, %o0
+
/* Linux native system calls enter here... */
.align 4
.globl linux_sparc_syscall
@@ -1002,11 +998,8 @@
bgeu linux_sparc_ni_syscall
sll %g1, 2, %l4
ld [%l7 + %l4], %l7
- andcc %l7, 1, %g0
- bne linux_fast_syscall
- /* Just do first insn from SAVE_ALL in the delay slot */
-syscall_is_too_hard:
+do_syscall:
SAVE_ALL_HEAD
rd %wim, %l3
diff --git a/arch/sparc/kernel/etrap_64.S b/arch/sparc/kernel/etrap_64.S
index 786b185..1276ca2 100644
--- a/arch/sparc/kernel/etrap_64.S
+++ b/arch/sparc/kernel/etrap_64.S
@@ -92,8 +92,10 @@
rdpr %wstate, %g2
wrpr %g0, 0, %canrestore
sll %g2, 3, %g2
+
+ /* Set TI_SYS_FPDEPTH to 1 and clear TI_SYS_NOERROR. */
mov 1, %l5
- stb %l5, [%l6 + TI_FPDEPTH]
+ sth %l5, [%l6 + TI_SYS_NOERROR]
wrpr %g3, 0, %otherwin
wrpr %g2, 0, %wstate
@@ -152,7 +154,9 @@
add %l6, TI_FPSAVED + 1, %l4
srl %l5, 1, %l3
add %l5, 2, %l5
- stb %l5, [%l6 + TI_FPDEPTH]
+
+ /* Set TI_SYS_FPDEPTH to %l5 and clear TI_SYS_NOERROR. */
+ sth %l5, [%l6 + TI_SYS_NOERROR]
ba,pt %xcc, 2b
stb %g0, [%l4 + %l3]
nop
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index 487bffb..bf4c6ad 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -316,9 +316,10 @@
* XXX See comment above sys_vfork in sparc64. todo.
*/
extern void ret_from_fork(void);
+extern void ret_from_kernel_thread(void);
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long unused,
+ unsigned long arg,
struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *ti = task_thread_info(p);
@@ -336,16 +337,13 @@
}
/*
- * p->thread_info new_stack childregs
- * ! ! ! {if(PSR_PS) }
- * V V (stk.fr.) V (pt_regs) { (stk.fr.) }
- * +----- - - - - - ------+===========+============={+==========}+
+ * p->thread_info new_stack childregs stack bottom
+ * ! ! ! !
+ * V V (stk.fr.) V (pt_regs) V
+ * +----- - - - - - ------+===========+=============+
*/
new_stack = task_stack_page(p) + THREAD_SIZE;
- if (regs->psr & PSR_PS)
- new_stack -= STACKFRAME_SZ;
new_stack -= STACKFRAME_SZ + TRACEREG_SZ;
- memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ);
childregs = (struct pt_regs *) (new_stack + STACKFRAME_SZ);
/*
@@ -356,55 +354,58 @@
* Thus, kpsr|=PSR_PIL.
*/
ti->ksp = (unsigned long) new_stack;
+ p->thread.kregs = childregs;
+
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ extern int nwindows;
+ unsigned long psr;
+ memset(new_stack, 0, STACKFRAME_SZ + TRACEREG_SZ);
+ p->thread.flags |= SPARC_FLAG_KTHREAD;
+ p->thread.current_ds = KERNEL_DS;
+ ti->kpc = (((unsigned long) ret_from_kernel_thread) - 0x8);
+ childregs->u_regs[UREG_G1] = sp; /* function */
+ childregs->u_regs[UREG_G2] = arg;
+ psr = childregs->psr = get_psr();
+ ti->kpsr = psr | PSR_PIL;
+ ti->kwim = 1 << (((psr & PSR_CWP) + 1) % nwindows);
+ return 0;
+ }
+ memcpy(new_stack, (char *)regs - STACKFRAME_SZ, STACKFRAME_SZ + TRACEREG_SZ);
+ childregs->u_regs[UREG_FP] = sp;
+ p->thread.flags &= ~SPARC_FLAG_KTHREAD;
+ p->thread.current_ds = USER_DS;
ti->kpc = (((unsigned long) ret_from_fork) - 0x8);
ti->kpsr = current->thread.fork_kpsr | PSR_PIL;
ti->kwim = current->thread.fork_kwim;
- if(regs->psr & PSR_PS) {
- extern struct pt_regs fake_swapper_regs;
+ if (sp != regs->u_regs[UREG_FP]) {
+ struct sparc_stackf __user *childstack;
+ struct sparc_stackf __user *parentstack;
- p->thread.kregs = &fake_swapper_regs;
- new_stack += STACKFRAME_SZ + TRACEREG_SZ;
- childregs->u_regs[UREG_FP] = (unsigned long) new_stack;
- p->thread.flags |= SPARC_FLAG_KTHREAD;
- p->thread.current_ds = KERNEL_DS;
- memcpy(new_stack, (void *)regs->u_regs[UREG_FP], STACKFRAME_SZ);
- childregs->u_regs[UREG_G6] = (unsigned long) ti;
- } else {
- p->thread.kregs = childregs;
- childregs->u_regs[UREG_FP] = sp;
- p->thread.flags &= ~SPARC_FLAG_KTHREAD;
- p->thread.current_ds = USER_DS;
-
- if (sp != regs->u_regs[UREG_FP]) {
- struct sparc_stackf __user *childstack;
- struct sparc_stackf __user *parentstack;
-
- /*
- * This is a clone() call with supplied user stack.
- * Set some valid stack frames to give to the child.
- */
- childstack = (struct sparc_stackf __user *)
- (sp & ~0xfUL);
- parentstack = (struct sparc_stackf __user *)
- regs->u_regs[UREG_FP];
+ /*
+ * This is a clone() call with supplied user stack.
+ * Set some valid stack frames to give to the child.
+ */
+ childstack = (struct sparc_stackf __user *)
+ (sp & ~0xfUL);
+ parentstack = (struct sparc_stackf __user *)
+ regs->u_regs[UREG_FP];
#if 0
- printk("clone: parent stack:\n");
- show_stackframe(parentstack);
+ printk("clone: parent stack:\n");
+ show_stackframe(parentstack);
#endif
- childstack = clone_stackframe(childstack, parentstack);
- if (!childstack)
- return -EFAULT;
+ childstack = clone_stackframe(childstack, parentstack);
+ if (!childstack)
+ return -EFAULT;
#if 0
- printk("clone: child stack:\n");
- show_stackframe(childstack);
+ printk("clone: child stack:\n");
+ show_stackframe(childstack);
#endif
- childregs->u_regs[UREG_FP] = (unsigned long)childstack;
- }
+ childregs->u_regs[UREG_FP] = (unsigned long)childstack;
}
#ifdef CONFIG_SMP
@@ -475,69 +476,6 @@
return 1;
}
-/*
- * sparc_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage int sparc_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* Check for indirect call. */
- if(regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname((char __user *)regs->u_regs[base + UREG_I0]);
- error = PTR_ERR(filename);
- if(IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I1],
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I2],
- regs);
- putname(filename);
-out:
- return error;
-}
-
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
-
- __asm__ __volatile__("mov %4, %%g2\n\t" /* Set aside fn ptr... */
- "mov %5, %%g3\n\t" /* and arg. */
- "mov %1, %%g1\n\t"
- "mov %2, %%o0\n\t" /* Clone flags. */
- "mov 0, %%o1\n\t" /* usp arg == 0 */
- "t 0x10\n\t" /* Linux/Sparc clone(). */
- "cmp %%o1, 0\n\t"
- "be 1f\n\t" /* The parent, just return. */
- " nop\n\t" /* Delay slot. */
- "jmpl %%g2, %%o7\n\t" /* Call the function. */
- " mov %%g3, %%o0\n\t" /* Get back the arg in delay. */
- "mov %3, %%g1\n\t"
- "t 0x10\n\t" /* Linux/Sparc exit(). */
- /* Notreached by child. */
- "1: mov %%o0, %0\n\t" :
- "=r" (retval) :
- "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
- "i" (__NR_exit), "r" (fn), "r" (arg) :
- "g1", "g2", "g3", "o0", "o1", "memory", "cc");
- return retval;
-}
-EXPORT_SYMBOL(kernel_thread);
-
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index c6e0c29..dff54f4 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -622,65 +622,56 @@
* Child --> %o0 == parents pid, %o1 == 1
*/
int copy_thread(unsigned long clone_flags, unsigned long sp,
- unsigned long unused,
+ unsigned long arg,
struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *t = task_thread_info(p);
struct sparc_stackf *parent_sf;
unsigned long child_stack_sz;
char *child_trap_frame;
- int kernel_thread;
-
- kernel_thread = (regs->tstate & TSTATE_PRIV) ? 1 : 0;
- parent_sf = ((struct sparc_stackf *) regs) - 1;
/* Calculate offset to stack_frame & pt_regs */
- child_stack_sz = ((STACKFRAME_SZ + TRACEREG_SZ) +
- (kernel_thread ? STACKFRAME_SZ : 0));
+ child_stack_sz = (STACKFRAME_SZ + TRACEREG_SZ);
child_trap_frame = (task_stack_page(p) +
(THREAD_SIZE - child_stack_sz));
- memcpy(child_trap_frame, parent_sf, child_stack_sz);
- t->flags = (t->flags & ~((0xffUL << TI_FLAG_CWP_SHIFT) |
- (0xffUL << TI_FLAG_CURRENT_DS_SHIFT))) |
- (((regs->tstate + 1) & TSTATE_CWP) << TI_FLAG_CWP_SHIFT);
t->new_child = 1;
t->ksp = ((unsigned long) child_trap_frame) - STACK_BIAS;
t->kregs = (struct pt_regs *) (child_trap_frame +
sizeof(struct sparc_stackf));
t->fpsaved[0] = 0;
- if (kernel_thread) {
- struct sparc_stackf *child_sf = (struct sparc_stackf *)
- (child_trap_frame + (STACKFRAME_SZ + TRACEREG_SZ));
-
- /* Zero terminate the stack backtrace. */
- child_sf->fp = NULL;
- t->kregs->u_regs[UREG_FP] =
- ((unsigned long) child_sf) - STACK_BIAS;
-
- t->flags |= ((long)ASI_P << TI_FLAG_CURRENT_DS_SHIFT);
- t->kregs->u_regs[UREG_G6] = (unsigned long) t;
- t->kregs->u_regs[UREG_G4] = (unsigned long) t->task;
- } else {
- if (t->flags & _TIF_32BIT) {
- sp &= 0x00000000ffffffffUL;
- regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
- }
- t->kregs->u_regs[UREG_FP] = sp;
- t->flags |= ((long)ASI_AIUS << TI_FLAG_CURRENT_DS_SHIFT);
- if (sp != regs->u_regs[UREG_FP]) {
- unsigned long csp;
-
- csp = clone_stackframe(sp, regs->u_regs[UREG_FP]);
- if (!csp)
- return -EFAULT;
- t->kregs->u_regs[UREG_FP] = csp;
- }
- if (t->utraps)
- t->utraps[0]++;
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ memset(child_trap_frame, 0, child_stack_sz);
+ __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP] =
+ (current_pt_regs()->tstate + 1) & TSTATE_CWP;
+ t->current_ds = ASI_P;
+ t->kregs->u_regs[UREG_G1] = sp; /* function */
+ t->kregs->u_regs[UREG_G2] = arg;
+ return 0;
}
+ parent_sf = ((struct sparc_stackf *) regs) - 1;
+ memcpy(child_trap_frame, parent_sf, child_stack_sz);
+ if (t->flags & _TIF_32BIT) {
+ sp &= 0x00000000ffffffffUL;
+ regs->u_regs[UREG_FP] &= 0x00000000ffffffffUL;
+ }
+ t->kregs->u_regs[UREG_FP] = sp;
+ __thread_flag_byte_ptr(t)[TI_FLAG_BYTE_CWP] =
+ (regs->tstate + 1) & TSTATE_CWP;
+ t->current_ds = ASI_AIUS;
+ if (sp != regs->u_regs[UREG_FP]) {
+ unsigned long csp;
+
+ csp = clone_stackframe(sp, regs->u_regs[UREG_FP]);
+ if (!csp)
+ return -EFAULT;
+ t->kregs->u_regs[UREG_FP] = csp;
+ }
+ if (t->utraps)
+ t->utraps[0]++;
+
/* Set the return value for the child. */
t->kregs->u_regs[UREG_I0] = current->pid;
t->kregs->u_regs[UREG_I1] = 1;
@@ -694,45 +685,6 @@
return 0;
}
-/*
- * This is the mechanism for creating a new kernel thread.
- *
- * NOTE! Only a kernel-only process(ie the swapper or direct descendants
- * who haven't done an "execve()") should use this: it will work within
- * a system call from a "real" process, but the process memory space will
- * not be freed until both the parent and the child have exited.
- */
-pid_t kernel_thread(int (*fn)(void *), void * arg, unsigned long flags)
-{
- long retval;
-
- /* If the parent runs before fn(arg) is called by the child,
- * the input registers of this function can be clobbered.
- * So we stash 'fn' and 'arg' into global registers which
- * will not be modified by the parent.
- */
- __asm__ __volatile__("mov %4, %%g2\n\t" /* Save FN into global */
- "mov %5, %%g3\n\t" /* Save ARG into global */
- "mov %1, %%g1\n\t" /* Clone syscall nr. */
- "mov %2, %%o0\n\t" /* Clone flags. */
- "mov 0, %%o1\n\t" /* usp arg == 0 */
- "t 0x6d\n\t" /* Linux/Sparc clone(). */
- "brz,a,pn %%o1, 1f\n\t" /* Parent, just return. */
- " mov %%o0, %0\n\t"
- "jmpl %%g2, %%o7\n\t" /* Call the function. */
- " mov %%g3, %%o0\n\t" /* Set arg in delay. */
- "mov %3, %%g1\n\t"
- "t 0x6d\n\t" /* Linux/Sparc exit(). */
- /* Notreached by child. */
- "1:" :
- "=r" (retval) :
- "i" (__NR_clone), "r" (flags | CLONE_VM | CLONE_UNTRACED),
- "i" (__NR_exit), "r" (fn), "r" (arg) :
- "g1", "g2", "g3", "o0", "o1", "memory", "cc");
- return retval;
-}
-EXPORT_SYMBOL(kernel_thread);
-
typedef struct {
union {
unsigned int pr_regs[32];
@@ -799,41 +751,6 @@
}
EXPORT_SYMBOL(dump_fpu);
-/*
- * sparc_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage int sparc_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* User register window flush is done by entry.S */
-
- /* Check for indirect call. */
- if (regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname((char __user *)regs->u_regs[base + UREG_I0]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I1],
- (const char __user *const __user *)
- regs->u_regs[base + UREG_I2], regs);
- putname(filename);
- if (!error) {
- fprs_write(0);
- current_thread_info()->xfsr[0] = 0;
- current_thread_info()->fpsaved[0] = 0;
- regs->tstate &= ~TSTATE_PEF;
- }
-out:
- return error;
-}
-
unsigned long get_wchan(struct task_struct *task)
{
unsigned long pc, fp, bias = 0;
diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
index c323981..03c7e92 100644
--- a/arch/sparc/kernel/sys_sparc32.c
+++ b/arch/sparc/kernel/sys_sparc32.c
@@ -396,42 +396,6 @@
return ret;
}
-/*
- * sparc32_execve() executes a new program after the asm stub has set
- * things up for us. This should basically do what I want it to.
- */
-asmlinkage long sparc32_execve(struct pt_regs *regs)
-{
- int error, base = 0;
- struct filename *filename;
-
- /* User register window flush is done by entry.S */
-
- /* Check for indirect call. */
- if ((u32)regs->u_regs[UREG_G1] == 0)
- base = 1;
-
- filename = getname(compat_ptr(regs->u_regs[base + UREG_I0]));
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
-
- error = compat_do_execve(filename->name,
- compat_ptr(regs->u_regs[base + UREG_I1]),
- compat_ptr(regs->u_regs[base + UREG_I2]), regs);
-
- putname(filename);
-
- if (!error) {
- fprs_write(0);
- current_thread_info()->xfsr[0] = 0;
- current_thread_info()->fpsaved[0] = 0;
- regs->tstate &= ~TSTATE_PEF;
- }
-out:
- return error;
-}
-
#ifdef CONFIG_MODULES
asmlinkage long sys32_init_module(void __user *umod, u32 len,
diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
index 0c9b31b..a8e6eb0 100644
--- a/arch/sparc/kernel/sys_sparc_32.c
+++ b/arch/sparc/kernel/sys_sparc_32.c
@@ -258,27 +258,3 @@
up_read(&uts_sem);
return err;
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- long __res;
- register long __g1 __asm__ ("g1") = __NR_execve;
- register long __o0 __asm__ ("o0") = (long)(filename);
- register long __o1 __asm__ ("o1") = (long)(argv);
- register long __o2 __asm__ ("o2") = (long)(envp);
- asm volatile ("t 0x10\n\t"
- "bcc 1f\n\t"
- "mov %%o0, %0\n\t"
- "sub %%g0, %%o0, %0\n\t"
- "1:\n\t"
- : "=r" (__res), "=&r" (__o0)
- : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
- : "cc");
- return __res;
-}
diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 878ef3d..51b85fe 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -730,28 +730,6 @@
return ret;
}
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename,
- const char *const argv[],
- const char *const envp[])
-{
- long __res;
- register long __g1 __asm__ ("g1") = __NR_execve;
- register long __o0 __asm__ ("o0") = (long)(filename);
- register long __o1 __asm__ ("o1") = (long)(argv);
- register long __o2 __asm__ ("o2") = (long)(envp);
- asm volatile ("t 0x6d\n\t"
- "sub %%g0, %%o0, %0\n\t"
- "movcc %%xcc, %%o0, %0\n\t"
- : "=r" (__res), "=&r" (__o0)
- : "1" (__o0), "r" (__o1), "r" (__o2), "r" (__g1)
- : "cc");
- return __res;
-}
-
asmlinkage long sys_kern_features(void)
{
return KERN_FEATURE_MIXED_MODE_STACK;
diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index 7f5f65d..2ef41e6 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -1,23 +1,19 @@
/* SunOS's execv() call only specifies the argv argument, the
* environment settings are the same as the calling processes.
*/
-sys_execve:
- sethi %hi(sparc_execve), %g1
- ba,pt %xcc, execve_merge
- or %g1, %lo(sparc_execve), %g1
+sys64_execve:
+ set sys_execve, %g1
+ jmpl %g1, %g0
+ flushw
#ifdef CONFIG_COMPAT
sunos_execv:
- stx %g0, [%sp + PTREGS_OFF + PT_V9_I2]
+ mov %g0, %o2
sys32_execve:
- sethi %hi(sparc32_execve), %g1
- or %g1, %lo(sparc32_execve), %g1
-#endif
-
-execve_merge:
- flushw
+ set compat_sys_execve, %g1
jmpl %g1, %g0
- add %sp, PTREGS_OFF, %o0
+ flushw
+#endif
.align 32
sys_sparc_pipe:
@@ -112,11 +108,16 @@
ret_from_syscall:
/* Clear current_thread_info()->new_child. */
stb %g0, [%g6 + TI_NEW_CHILD]
- ldx [%g6 + TI_FLAGS], %l0
call schedule_tail
mov %g7, %o0
+ ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
+ brnz,pt %o0, ret_sys_call
+ ldx [%g6 + TI_FLAGS], %l0
+ ldx [%sp + PTREGS_OFF + PT_V9_G1], %l1
+ call %l1
+ ldx [%sp + PTREGS_OFF + PT_V9_G2], %o0
ba,pt %xcc, ret_sys_call
- ldx [%sp + PTREGS_OFF + PT_V9_I0], %o0
+ mov 0, %o0
.globl sparc_exit
.type sparc_exit,#function
@@ -222,7 +223,6 @@
ldx [%sp + PTREGS_OFF + PT_V9_TNPC], %l1 ! pc = npc
2:
- stb %g0, [%g6 + TI_SYS_NOERROR]
/* System call success, clear Carry condition code. */
andn %g3, %g2, %g3
3:
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index 45ce6be..d8b22b3 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -107,7 +107,7 @@
/*40*/ .word sys_newlstat, sys_dup, sys_sparc_pipe, sys_times, sys_nis_syscall
.word sys_umount, sys_setgid, sys_getgid, sys_signal, sys_geteuid
/*50*/ .word sys_getegid, sys_acct, sys_memory_ordering, sys_nis_syscall, sys_ioctl
- .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys_execve
+ .word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys64_execve
/*60*/ .word sys_umask, sys_chroot, sys_newfstat, sys_fstat64, sys_getpagesize
.word sys_msync, sys_vfork, sys_pread64, sys_pwrite64, sys_nis_syscall
/*70*/ .word sys_nis_syscall, sys_mmap, sys_nis_syscall, sys_64_munmap, sys_mprotect
diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index b66a779..e7ecf15 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -2688,8 +2688,8 @@
TI_PRE_COUNT != offsetof(struct thread_info,
preempt_count) ||
TI_NEW_CHILD != offsetof(struct thread_info, new_child) ||
- TI_SYS_NOERROR != offsetof(struct thread_info,
- syscall_noerror) ||
+ TI_CURRENT_DS != offsetof(struct thread_info,
+ current_ds) ||
TI_RESTART_BLOCK != offsetof(struct thread_info,
restart_block) ||
TI_KUNA_REGS != offsetof(struct thread_info,
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index 9e28a11..85be1ca 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -624,7 +624,7 @@
void prom_world(int enter)
{
if (!enter)
- set_fs((mm_segment_t) { get_thread_current_ds() });
+ set_fs(get_fs());
__asm__ __volatile__("flushw");
}