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Merge branch 'arch-sparc' into no-rebases

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This commit is contained in:
Al Viro
2012-10-17 01:18:53 -04:00
parent fefec52b98 f7200d4c50
commit 87d2fed728
20 changed files with 157 additions and 377 deletions
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2
arch/sparc/Kconfig
View File

@@ -40,6 +40,8 @@ config SPARC
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

1
arch/sparc/include/asm/processor_32.h
View File

@@ -106,7 +106,6 @@ static inline void start_thread(struct pt_regs * regs, unsigned long pc,
/* 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 *);

11
arch/sparc/include/asm/processor_64.h
View File

@@ -94,6 +94,7 @@ struct thread_struct {
#ifndef __ASSEMBLY__
#include <linux/types.h>
#include <asm/fpumacro.h>
/* Return saved PC of a blocked thread. */
struct task_struct;
@@ -143,6 +144,10 @@ do { \
: \
: "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 @@ do { \
: \
: "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)

10
arch/sparc/include/asm/ptrace.h
View File

@@ -32,6 +32,9 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
#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;
@@ -44,9 +47,7 @@ struct global_reg_snapshot {
};
extern struct global_reg_snapshot global_reg_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))
@@ -89,6 +90,9 @@ static inline bool pt_regs_clear_syscall(struct pt_regs *regs)
#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])

2
arch/sparc/include/asm/switch_to_64.h
View File

@@ -23,7 +23,7 @@ do { flush_tlb_pending(); \
/* 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__( \

2
arch/sparc/include/asm/syscalls.h
View File

@@ -8,6 +8,4 @@ extern asmlinkage long sparc_do_fork(unsigned long clone_flags,
struct pt_regs *regs,
unsigned long stack_size);
extern asmlinkage int sparc_execve(struct pt_regs *regs);
#endif /* _SPARC64_SYSCALLS_H */

25
arch/sparc/include/asm/thread_info_64.h
View File

@@ -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 thread_info {
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 @@ struct thread_info {
#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 @@ struct thread_info {
#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 @@ struct thread_info {
#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 @@ register struct thread_info *current_thread_info_reg asm("g6");
#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__) */
/*

4
arch/sparc/include/asm/uaccess_64.h
View File

@@ -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)

1
arch/sparc/include/asm/unistd.h
View File

@@ -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

51
arch/sparc/kernel/entry.S
View File

@@ -806,23 +806,10 @@ sys_nis_syscall:
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 @@ flush_patch_four:
.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 @@ ret_from_fork:
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 @@ linux_sparc_syscall:
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

8
arch/sparc/kernel/etrap_64.S
View File

@@ -92,8 +92,10 @@ etrap_save: save %g2, -STACK_BIAS, %sp
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 @@ etrap_save: save %g2, -STACK_BIAS, %sp
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

152
arch/sparc/kernel/process_32.c
View File

@@ -316,9 +316,10 @@ asmlinkage int sparc_do_fork(unsigned long clone_flags,
* 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 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
}
/*
* 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 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
* 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 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
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;

145
arch/sparc/kernel/process_64.c
View File

@@ -538,65 +538,56 @@ asmlinkage long sparc_do_fork(unsigned long clone_flags,
* 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;
@@ -610,45 +601,6 @@ int copy_thread(unsigned long clone_flags, unsigned long sp,
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];
@@ -715,41 +667,6 @@ int dump_fpu (struct pt_regs * regs, elf_fpregset_t * fpregs)
}
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;

36
arch/sparc/kernel/sys_sparc32.c
View File

@@ -396,42 +396,6 @@ asmlinkage long compat_sys_rt_sigaction(int sig,
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,

24
arch/sparc/kernel/sys_sparc_32.c
View File

@@ -258,27 +258,3 @@ out:
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;
}

22
arch/sparc/kernel/sys_sparc_64.c
View File

@@ -729,25 +729,3 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
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;
}

30
arch/sparc/kernel/syscalls.S
View File

@@ -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 @@ sys_clone:
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 @@ ret_sys_call:
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:

2
arch/sparc/kernel/systbls_64.S
View File

@@ -106,7 +106,7 @@ sys_call_table:
/*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

4
arch/sparc/kernel/traps_64.c
View File

@@ -2688,8 +2688,8 @@ void __init trap_init(void)
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,

2
arch/sparc/mm/init_64.c
View File

@@ -624,7 +624,7 @@ static void __init inherit_prom_mappings(void)
void prom_world(int enter)
{
if (!enter)
set_fs((mm_segment_t) { get_thread_current_ds() });
set_fs(get_fs());
__asm__ __volatile__("flushw");
}