diff options
Diffstat (limited to 'arch/h8300')
| -rw-r--r-- | arch/h8300/Kconfig | 2 | ||||
| -rw-r--r-- | arch/h8300/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/h8300/include/asm/ptrace.h | 3 | ||||
| -rw-r--r-- | arch/h8300/include/asm/signal.h | 2 | ||||
| -rw-r--r-- | arch/h8300/include/asm/unistd.h | 4 | ||||
| -rw-r--r-- | arch/h8300/kernel/entry.S | 9 | ||||
| -rw-r--r-- | arch/h8300/kernel/h8300_ksyms.c | 1 | ||||
| -rw-r--r-- | arch/h8300/kernel/process.c | 100 | ||||
| -rw-r--r-- | arch/h8300/kernel/sys_h8300.c | 26 | ||||
| -rw-r--r-- | arch/h8300/kernel/syscalls.S | 9 |
10 files changed, 29 insertions, 129 deletions
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig index 98fabd10e95..04bef4d25b4 100644 --- a/arch/h8300/Kconfig +++ b/arch/h8300/Kconfig @@ -8,6 +8,8 @@ config H8300 select GENERIC_IRQ_SHOW select GENERIC_CPU_DEVICES select MODULES_USE_ELF_RELA + select GENERIC_KERNEL_THREAD + select GENERIC_KERNEL_EXECVE config SYMBOL_PREFIX string diff --git a/arch/h8300/include/asm/processor.h b/arch/h8300/include/asm/processor.h index 4c9f6f87b61..4b0ca49bb46 100644 --- a/arch/h8300/include/asm/processor.h +++ b/arch/h8300/include/asm/processor.h @@ -107,8 +107,6 @@ static inline void release_thread(struct task_struct *dead_task) { } -extern int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags); - /* * Free current thread data structures etc.. */ diff --git a/arch/h8300/include/asm/ptrace.h b/arch/h8300/include/asm/ptrace.h index d09c440bdba..7468589a128 100644 --- a/arch/h8300/include/asm/ptrace.h +++ b/arch/h8300/include/asm/ptrace.h @@ -60,6 +60,9 @@ struct pt_regs { #define user_mode(regs) (!((regs)->ccr & PS_S)) #define instruction_pointer(regs) ((regs)->pc) #define profile_pc(regs) instruction_pointer(regs) +#define current_pt_regs() ((struct pt_regs *) \ + (THREAD_SIZE + (unsigned long)current_thread_info()) - 1) +#define signal_pt_regs() ((struct pt_regs *)current->thread.esp0) #endif /* __KERNEL__ */ #endif /* __ASSEMBLY__ */ #endif /* _H8300_PTRACE_H */ diff --git a/arch/h8300/include/asm/signal.h b/arch/h8300/include/asm/signal.h index fd8b66e40dc..c43c0a7d2c2 100644 --- a/arch/h8300/include/asm/signal.h +++ b/arch/h8300/include/asm/signal.h @@ -154,8 +154,6 @@ typedef struct sigaltstack { #include <asm/sigcontext.h> #undef __HAVE_ARCH_SIG_BITOPS -#define ptrace_signal_deliver(regs, cookie) do { } while (0) - #endif /* __KERNEL__ */ #endif /* _H8300_SIGNAL_H */ diff --git a/arch/h8300/include/asm/unistd.h b/arch/h8300/include/asm/unistd.h index 5cd882801d7..c2c2f5c7d6b 100644 --- a/arch/h8300/include/asm/unistd.h +++ b/arch/h8300/include/asm/unistd.h @@ -356,6 +356,10 @@ #define __ARCH_WANT_SYS_SIGPROCMASK #define __ARCH_WANT_SYS_RT_SIGACTION #define __ARCH_WANT_SYS_RT_SIGSUSPEND +#define __ARCH_WANT_SYS_EXECVE +#define __ARCH_WANT_SYS_FORK +#define __ARCH_WANT_SYS_VFORK +#define __ARCH_WANT_SYS_CLONE /* * "Conditional" syscalls diff --git a/arch/h8300/kernel/entry.S b/arch/h8300/kernel/entry.S index ca743169030..617a6878787 100644 --- a/arch/h8300/kernel/entry.S +++ b/arch/h8300/kernel/entry.S @@ -158,6 +158,7 @@ INTERRUPTS = 128 .globl SYMBOL_NAME(system_call) .globl SYMBOL_NAME(ret_from_exception) .globl SYMBOL_NAME(ret_from_fork) +.globl SYMBOL_NAME(ret_from_kernel_thread) .globl SYMBOL_NAME(ret_from_interrupt) .globl SYMBOL_NAME(interrupt_redirect_table) .globl SYMBOL_NAME(sw_ksp),SYMBOL_NAME(sw_usp) @@ -330,6 +331,14 @@ SYMBOL_NAME_LABEL(ret_from_fork) jsr @SYMBOL_NAME(schedule_tail) jmp @SYMBOL_NAME(ret_from_exception) +SYMBOL_NAME_LABEL(ret_from_kernel_thread) + mov.l er2,er0 + jsr @SYMBOL_NAME(schedule_tail) + mov.l @(LER4:16,sp),er0 + mov.l @(LER5:16,sp),er1 + jsr @er1 + jmp @SYMBOL_NAME(ret_from_exception) + SYMBOL_NAME_LABEL(resume) /* * Beware - when entering resume, offset of tss is in d1, diff --git a/arch/h8300/kernel/h8300_ksyms.c b/arch/h8300/kernel/h8300_ksyms.c index 6866bd9c7fb..53d7c0e4bd8 100644 --- a/arch/h8300/kernel/h8300_ksyms.c +++ b/arch/h8300/kernel/h8300_ksyms.c @@ -33,7 +33,6 @@ EXPORT_SYMBOL(strncmp); EXPORT_SYMBOL(ip_fast_csum); -EXPORT_SYMBOL(kernel_thread); EXPORT_SYMBOL(enable_irq); EXPORT_SYMBOL(disable_irq); diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c index e8dc1393a13..b609f63f159 100644 --- a/arch/h8300/kernel/process.c +++ b/arch/h8300/kernel/process.c @@ -47,6 +47,7 @@ void (*pm_power_off)(void) = NULL; EXPORT_SYMBOL(pm_power_off); asmlinkage void ret_from_fork(void); +asmlinkage void ret_from_kernel_thread(void); /* * The idle loop on an H8/300.. @@ -122,113 +123,34 @@ void show_regs(struct pt_regs * regs) printk("\n"); } -/* - * Create a kernel thread - */ -int kernel_thread(int (*fn)(void *), void * arg, unsigned long flags) -{ - long retval; - long clone_arg; - mm_segment_t fs; - - fs = get_fs(); - set_fs (KERNEL_DS); - clone_arg = flags | CLONE_VM; - __asm__("mov.l sp,er3\n\t" - "sub.l er2,er2\n\t" - "mov.l %2,er1\n\t" - "mov.l %1,er0\n\t" - "trapa #0\n\t" - "cmp.l sp,er3\n\t" - "beq 1f\n\t" - "mov.l %4,er0\n\t" - "mov.l %3,er1\n\t" - "jsr @er1\n\t" - "mov.l %5,er0\n\t" - "trapa #0\n" - "1:\n\t" - "mov.l er0,%0" - :"=r"(retval) - :"i"(__NR_clone),"g"(clone_arg),"g"(fn),"g"(arg),"i"(__NR_exit) - :"er0","er1","er2","er3"); - set_fs (fs); - return retval; -} - void flush_thread(void) { } -/* - * "h8300_fork()".. By the time we get here, the - * non-volatile registers have also been saved on the - * stack. We do some ugly pointer stuff here.. (see - * also copy_thread) - */ - -asmlinkage int h8300_fork(struct pt_regs *regs) -{ - return -EINVAL; -} - -asmlinkage int h8300_vfork(struct pt_regs *regs) -{ - return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, rdusp(), regs, 0, NULL, NULL); -} - -asmlinkage int h8300_clone(struct pt_regs *regs) -{ - unsigned long clone_flags; - unsigned long newsp; - - /* syscall2 puts clone_flags in er1 and usp in er2 */ - clone_flags = regs->er1; - newsp = regs->er2; - if (!newsp) - newsp = rdusp(); - return do_fork(clone_flags, newsp, regs, 0, NULL, NULL); - -} - int copy_thread(unsigned long clone_flags, unsigned long usp, unsigned long topstk, - struct task_struct * p, struct pt_regs * regs) + struct task_struct * p) { struct pt_regs * childregs; childregs = (struct pt_regs *) (THREAD_SIZE + task_stack_page(p)) - 1; - *childregs = *regs; + if (unlikely(p->flags & PF_KTHREAD)) { + memset(childregs, 0, sizeof(struct pt_regs)); + childregs->retpc = (unsigned long) ret_from_kernel_thread; + childregs->er4 = topstk; /* arg */ + childregs->er5 = usp; /* fn */ + p->thread.ksp = (unsigned long)childregs; + } + *childregs = *current_pt_regs(); childregs->retpc = (unsigned long) ret_from_fork; childregs->er0 = 0; - - p->thread.usp = usp; + p->thread.usp = usp ?: rdusp(); p->thread.ksp = (unsigned long)childregs; return 0; } -/* - * sys_execve() executes a new program. - */ -asmlinkage int sys_execve(const char *name, - const char *const *argv, - const char *const *envp, - int dummy, ...) -{ - int error; - struct filename *filename; - struct pt_regs *regs = (struct pt_regs *) ((unsigned char *)&dummy-4); - - filename = getname(name); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - return error; - error = do_execve(filename->name, argv, envp, regs); - putname(filename); - return error; -} - unsigned long thread_saved_pc(struct task_struct *tsk) { return ((struct pt_regs *)tsk->thread.esp0)->pc; diff --git a/arch/h8300/kernel/sys_h8300.c b/arch/h8300/kernel/sys_h8300.c index 4bdc7311784..bf350cb7f59 100644 --- a/arch/h8300/kernel/sys_h8300.c +++ b/arch/h8300/kernel/sys_h8300.c @@ -46,29 +46,3 @@ asmlinkage void syscall_print(void *dummy,...) ((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0); } #endif - -/* - * Do a system call from kernel instead of calling sys_execve so we - * end up with proper pt_regs. - */ -asmlinkage -int kernel_execve(const char *filename, - const char *const argv[], - const char *const envp[]) -{ - register long res __asm__("er0"); - register const char *const *_c __asm__("er3") = envp; - register const char *const *_b __asm__("er2") = argv; - register const char * _a __asm__("er1") = filename; - __asm__ __volatile__ ("mov.l %1,er0\n\t" - "trapa #0\n\t" - : "=r" (res) - : "g" (__NR_execve), - "g" (_a), - "g" (_b), - "g" (_c) - : "cc", "memory"); - return res; -} - - diff --git a/arch/h8300/kernel/syscalls.S b/arch/h8300/kernel/syscalls.S index 9d77e715a2e..b74dd0ade58 100644 --- a/arch/h8300/kernel/syscalls.S +++ b/arch/h8300/kernel/syscalls.S @@ -340,21 +340,12 @@ SYMBOL_NAME_LABEL(sys_call_table) bra SYMBOL_NAME(syscall_trampoline):8 .endm -SYMBOL_NAME_LABEL(sys_clone) - call_sp h8300_clone - SYMBOL_NAME_LABEL(sys_sigreturn) call_sp do_sigreturn SYMBOL_NAME_LABEL(sys_rt_sigreturn) call_sp do_rt_sigreturn -SYMBOL_NAME_LABEL(sys_fork) - call_sp h8300_fork - -SYMBOL_NAME_LABEL(sys_vfork) - call_sp h8300_vfork - SYMBOL_NAME_LABEL(syscall_trampoline) mov.l sp,er0 jmp @er6 |