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-rw-r--r--arch/mips/Kconfig2
-rw-r--r--arch/mips/include/asm/processor.h2
-rw-r--r--arch/mips/include/asm/ptrace.h6
-rw-r--r--arch/mips/include/asm/unistd.h1
-rw-r--r--arch/mips/kernel/entry.S6
-rw-r--r--arch/mips/kernel/linux32.c21
-rw-r--r--arch/mips/kernel/mips_ksyms.c2
-rw-r--r--arch/mips/kernel/process.c62
-rw-r--r--arch/mips/kernel/scall64-n32.S2
-rw-r--r--arch/mips/kernel/scall64-o32.S2
-rw-r--r--arch/mips/kernel/syscall.c53
11 files changed, 39 insertions, 120 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index dba9390d37c..4183e62f178 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -40,6 +40,8 @@ config MIPS
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select MODULES_USE_ELF_RELA if 64BIT
+ select GENERIC_KERNEL_THREAD
+ select GENERIC_KERNEL_EXECVE
menu "Machine selection"
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 5e33fabe354..d28c41e0887 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -310,8 +310,6 @@ struct task_struct;
/* Free all resources held by a thread. */
#define release_thread(thread) do { } while(0)
-extern long kernel_thread(int (*fn)(void *), void * arg, unsigned long flags);
-
extern unsigned long thread_saved_pc(struct task_struct *tsk);
/*
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index 4f5da948a77..cec5e125f7e 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -61,4 +61,10 @@ static inline void die_if_kernel(const char *str, struct pt_regs *regs)
die(str, regs);
}
+#define current_pt_regs() \
+({ \
+ unsigned long sp = (unsigned long)__builtin_frame_address(0); \
+ (struct pt_regs *)((sp | (THREAD_SIZE - 1)) + 1 - 32) - 1; \
+})
+
#endif /* _ASM_PTRACE_H */
diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
index 9e47cc11aa2..b306e2081ca 100644
--- a/arch/mips/include/asm/unistd.h
+++ b/arch/mips/include/asm/unistd.h
@@ -20,6 +20,7 @@
#define __ARCH_OMIT_COMPAT_SYS_GETDENTS64
#define __ARCH_WANT_OLD_READDIR
#define __ARCH_WANT_SYS_ALARM
+#define __ARCH_WANT_SYS_EXECVE
#define __ARCH_WANT_SYS_GETHOSTNAME
#define __ARCH_WANT_SYS_IPC
#define __ARCH_WANT_SYS_PAUSE
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index a6c13321200..3320cb4ac1d 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -65,6 +65,12 @@ need_resched:
b need_resched
#endif
+FEXPORT(ret_from_kernel_thread)
+ jal schedule_tail # a0 = struct task_struct *prev
+ move a0, s1
+ jal s0
+ j syscall_exit
+
FEXPORT(ret_from_fork)
jal schedule_tail # a0 = struct task_struct *prev
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 3a21acedf88..8796dbc7e35 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -3,7 +3,6 @@
*
* Copyright (C) 2000 Silicon Graphics, Inc.
* Written by Ulf Carlsson (ulfc@engr.sgi.com)
- * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
*/
#include <linux/compiler.h>
#include <linux/mm.h>
@@ -77,26 +76,6 @@ out:
return error;
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname(compat_ptr(regs.regs[4]));
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = compat_do_execve(filename->name, compat_ptr(regs.regs[5]),
- compat_ptr(regs.regs[6]), &regs);
- putname(filename);
-
-out:
- return error;
-}
-
#define RLIM_INFINITY32 0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
diff --git a/arch/mips/kernel/mips_ksyms.c b/arch/mips/kernel/mips_ksyms.c
index 3fc1691110d..2d9304c2b54 100644
--- a/arch/mips/kernel/mips_ksyms.c
+++ b/arch/mips/kernel/mips_ksyms.c
@@ -32,8 +32,6 @@ EXPORT_SYMBOL(memset);
EXPORT_SYMBOL(memcpy);
EXPORT_SYMBOL(memmove);
-EXPORT_SYMBOL(kernel_thread);
-
/*
* Functions that operate on entire pages. Mostly used by memory management.
*/
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index e9a5fd7277f..d13720ac656 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -84,6 +84,7 @@ void __noreturn cpu_idle(void)
}
asmlinkage void ret_from_fork(void);
+asmlinkage void ret_from_kernel_thread(void);
void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
{
@@ -113,7 +114,7 @@ void flush_thread(void)
}
int copy_thread(unsigned long clone_flags, unsigned long usp,
- unsigned long unused, struct task_struct *p, struct pt_regs *regs)
+ unsigned long arg, struct task_struct *p, struct pt_regs *regs)
{
struct thread_info *ti = task_thread_info(p);
struct pt_regs *childregs;
@@ -136,19 +137,30 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
childregs = (struct pt_regs *) childksp - 1;
/* Put the stack after the struct pt_regs. */
childksp = (unsigned long) childregs;
+ p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
+ if (unlikely(p->flags & PF_KTHREAD)) {
+ unsigned long status = p->thread.cp0_status;
+ memset(childregs, 0, sizeof(struct pt_regs));
+ ti->addr_limit = KERNEL_DS;
+ p->thread.reg16 = usp; /* fn */
+ p->thread.reg17 = arg;
+ p->thread.reg29 = childksp;
+ p->thread.reg31 = (unsigned long) ret_from_kernel_thread;
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
+ status = (status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
+ ((status & (ST0_KUC | ST0_IEC)) << 2);
+#else
+ status |= ST0_EXL;
+#endif
+ childregs->cp0_status = status;
+ return 0;
+ }
*childregs = *regs;
childregs->regs[7] = 0; /* Clear error flag */
-
childregs->regs[2] = 0; /* Child gets zero as return value */
+ childregs->regs[29] = usp;
+ ti->addr_limit = USER_DS;
- if (childregs->cp0_status & ST0_CU0) {
- childregs->regs[28] = (unsigned long) ti;
- childregs->regs[29] = childksp;
- ti->addr_limit = KERNEL_DS;
- } else {
- childregs->regs[29] = usp;
- ti->addr_limit = USER_DS;
- }
p->thread.reg29 = (unsigned long) childregs;
p->thread.reg31 = (unsigned long) ret_from_fork;
@@ -156,7 +168,6 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
* New tasks lose permission to use the fpu. This accelerates context
* switching for most programs since they don't use the fpu.
*/
- p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
childregs->cp0_status &= ~(ST0_CU2|ST0_CU1);
#ifdef CONFIG_MIPS_MT_SMTC
@@ -222,35 +233,6 @@ int dump_task_fpu(struct task_struct *t, elf_fpregset_t *fpr)
}
/*
- * Create a kernel thread
- */
-static void __noreturn kernel_thread_helper(void *arg, int (*fn)(void *))
-{
- do_exit(fn(arg));
-}
-
-long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags)
-{
- struct pt_regs regs;
-
- memset(&regs, 0, sizeof(regs));
-
- regs.regs[4] = (unsigned long) arg;
- regs.regs[5] = (unsigned long) fn;
- regs.cp0_epc = (unsigned long) kernel_thread_helper;
- regs.cp0_status = read_c0_status();
-#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
- regs.cp0_status = (regs.cp0_status & ~(ST0_KUP | ST0_IEP | ST0_IEC)) |
- ((regs.cp0_status & (ST0_KUC | ST0_IEC)) << 2);
-#else
- regs.cp0_status |= ST0_EXL;
-#endif
-
- /* Ok, create the new process.. */
- return do_fork(flags | CLONE_VM | CLONE_UNTRACED, 0, &regs, 0, NULL, NULL);
-}
-
-/*
*
*/
struct mips_frame_info {
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index f6ba8381ee0..d27ca340d46 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -167,7 +167,7 @@ EXPORT(sysn32_call_table)
PTR sys_getsockopt
PTR sys_clone /* 6055 */
PTR sys_fork
- PTR sys32_execve
+ PTR compat_sys_execve
PTR sys_exit
PTR compat_sys_wait4
PTR sys_kill /* 6060 */
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 53c2d724576..9601be6afa3 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -203,7 +203,7 @@ sys_call_table:
PTR sys_creat
PTR sys_link
PTR sys_unlink /* 4010 */
- PTR sys32_execve
+ PTR compat_sys_execve
PTR sys_chdir
PTR compat_sys_time
PTR sys_mknod
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 2bd561bc05a..c611e2df776 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -127,28 +127,6 @@ _sys_clone(nabi_no_regargs struct pt_regs regs)
parent_tidptr, child_tidptr);
}
-/*
- * sys_execve() executes a new program.
- */
-asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
-{
- int error;
- struct filename *filename;
-
- filename = getname((const char __user *) (long)regs.regs[4]);
- error = PTR_ERR(filename);
- if (IS_ERR(filename))
- goto out;
- error = do_execve(filename->name,
- (const char __user *const __user *) (long)regs.regs[5],
- (const char __user *const __user *) (long)regs.regs[6],
- &regs);
- putname(filename);
-
-out:
- return error;
-}
-
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{
struct thread_info *ti = task_thread_info(current);
@@ -313,34 +291,3 @@ asmlinkage void bad_stack(void)
{
do_exit(SIGSEGV);
}
-
-/*
- * 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[])
-{
- register unsigned long __a0 asm("$4") = (unsigned long) filename;
- register unsigned long __a1 asm("$5") = (unsigned long) argv;
- register unsigned long __a2 asm("$6") = (unsigned long) envp;
- register unsigned long __a3 asm("$7");
- unsigned long __v0;
-
- __asm__ volatile (" \n"
- " .set noreorder \n"
- " li $2, %5 # __NR_execve \n"
- " syscall \n"
- " move %0, $2 \n"
- " .set reorder \n"
- : "=&r" (__v0), "=r" (__a3)
- : "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
- : "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
- "memory");
-
- if (__a3 == 0)
- return __v0;
-
- return -__v0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-08 10:42:29 +0000