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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-28 18:20:01 (GMT) |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-16 23:03:53 (GMT) |
| commit | ab3486813bbbd9e74efb4c130183f3994dada4bd (patch) | |
| tree | 360d3fd62ca0b9d7940573091b5d700c4471b78a | |
| parent | c78e06430ea621ce59d20cb899a9a86bdcf4487b (diff) | |
| download | linux-fsl-qoriq-ab3486813bbbd9e74efb4c130183f3994dada4bd.tar.xz | |
sparc32: switch to generic kernel_execve()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/sparc/Kconfig | 2 | ||||
| -rw-r--r-- | arch/sparc/include/asm/ptrace.h | 3 | ||||
| -rw-r--r-- | arch/sparc/kernel/entry.S | 11 | ||||
| -rw-r--r-- | arch/sparc/kernel/sys_sparc_32.c | 24 |
4 files changed, 13 insertions, 27 deletions
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig index edc4ede..e52f3c2 100644 --- a/arch/sparc/Kconfig +++ b/arch/sparc/Kconfig @@ -41,6 +41,7 @@ config SPARC select GENERIC_STRNLEN_USER select MODULES_USE_ELF_RELA select GENERIC_KERNEL_THREAD + select GENERIC_KERNEL_EXECVE config SPARC32 def_bool !64BIT @@ -75,7 +76,6 @@ config SPARC64 select ARCH_HAVE_NMI_SAFE_CMPXCHG select HAVE_C_RECORDMCOUNT select NO_BOOTMEM - select GENERIC_KERNEL_EXECVE config ARCH_DEFCONFIG string diff --git a/arch/sparc/include/asm/ptrace.h b/arch/sparc/include/asm/ptrace.h index 7a40750..1e8b818 100644 --- a/arch/sparc/include/asm/ptrace.h +++ b/arch/sparc/include/asm/ptrace.h @@ -90,6 +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]) diff --git a/arch/sparc/kernel/entry.S b/arch/sparc/kernel/entry.S index 6114672..36b35e5 100644 --- a/arch/sparc/kernel/entry.S +++ b/arch/sparc/kernel/entry.S @@ -990,8 +990,15 @@ ret_from_kernel_thread: ld [%sp + STACKFRAME_SZ + PT_G1], %l0 call %l0 ld [%sp + STACKFRAME_SZ + PT_G2], %o0 - call do_exit /* won't return */ - clr %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 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 @@ 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; -} |