From 293c5bd13f124c325f74f89ad26edf5612ce7235 Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Wed, 25 Jul 2007 16:19:33 +0100 Subject: [MIPS] Fixup secure computing stuff. Signed-off-by: Ralf Baechle --- include/asm-mips/a.out.h | 3 ++- include/asm-mips/elf.h | 13 +++++++------ include/asm-mips/processor.h | 20 +++----------------- include/asm-mips/seccomp.h | 37 +++++++++++++++++++++++++++++++++++++ include/asm-mips/system.h | 8 +++++--- include/asm-mips/thread_info.h | 12 +++++++++++- 6 files changed, 65 insertions(+), 28 deletions(-) create mode 100644 include/asm-mips/seccomp.h (limited to 'include/asm-mips') diff --git a/include/asm-mips/a.out.h b/include/asm-mips/a.out.h index 1ad60ba186d0..bf55a5b34bef 100644 --- a/include/asm-mips/a.out.h +++ b/include/asm-mips/a.out.h @@ -38,7 +38,8 @@ struct exec #define STACK_TOP TASK_SIZE #endif #ifdef CONFIG_64BIT -#define STACK_TOP (current->thread.mflags & MF_32BIT_ADDR ? TASK_SIZE32 : TASK_SIZE) +#define STACK_TOP \ + (test_thread_flag(TIF_32BIT_ADDR) ? TASK_SIZE32 : TASK_SIZE) #endif #define STACK_TOP_MAX TASK_SIZE diff --git a/include/asm-mips/elf.h b/include/asm-mips/elf.h index ebd6bfb19d66..e7d95d48177d 100644 --- a/include/asm-mips/elf.h +++ b/include/asm-mips/elf.h @@ -265,7 +265,7 @@ do { \ #ifdef CONFIG_MIPS32_N32 #define __SET_PERSONALITY32_N32() \ do { \ - current->thread.mflags |= MF_N32; \ + set_thread_flag(TIF_32BIT_ADDR); \ current->thread.abi = &mips_abi_n32; \ } while (0) #else @@ -276,7 +276,8 @@ do { \ #ifdef CONFIG_MIPS32_O32 #define __SET_PERSONALITY32_O32() \ do { \ - current->thread.mflags |= MF_O32; \ + set_thread_flag(TIF_32BIT_REGS); \ + set_thread_flag(TIF_32BIT_ADDR); \ current->thread.abi = &mips_abi_32; \ } while (0) #else @@ -299,13 +300,13 @@ do { \ #define SET_PERSONALITY(ex, ibcs2) \ do { \ - current->thread.mflags &= ~MF_ABI_MASK; \ + clear_thread_flag(TIF_32BIT_REGS); \ + clear_thread_flag(TIF_32BIT_ADDR); \ + \ if ((ex).e_ident[EI_CLASS] == ELFCLASS32) \ __SET_PERSONALITY32(ex); \ - else { \ - current->thread.mflags |= MF_N64; \ + else \ current->thread.abi = &mips_abi; \ - } \ \ if (ibcs2) \ set_personality(PER_SVR4); \ diff --git a/include/asm-mips/processor.h b/include/asm-mips/processor.h index 1d8b9a8ae324..83bc94534084 100644 --- a/include/asm-mips/processor.h +++ b/include/asm-mips/processor.h @@ -62,8 +62,9 @@ extern unsigned int vced_count, vcei_count; * This decides where the kernel will search for a free chunk of vm * space during mmap's. */ -#define TASK_UNMAPPED_BASE ((current->thread.mflags & MF_32BIT_ADDR) ? \ - PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3)) +#define TASK_UNMAPPED_BASE \ + (test_thread_flag(TIF_32BIT_ADDR) ? \ + PAGE_ALIGN(TASK_SIZE32 / 3) : PAGE_ALIGN(TASK_SIZE / 3)) #endif #define NUM_FPU_REGS 32 @@ -132,22 +133,11 @@ struct thread_struct { unsigned long cp0_baduaddr; /* Last kernel fault accessing USEG */ unsigned long error_code; unsigned long trap_no; -#define MF_FIXADE 1 /* Fix address errors in software */ -#define MF_LOGADE 2 /* Log address errors to syslog */ -#define MF_32BIT_REGS 4 /* also implies 16/32 fprs */ -#define MF_32BIT_ADDR 8 /* 32-bit address space (o32/n32) */ -#define MF_FPUBOUND 0x10 /* thread bound to FPU-full CPU set */ - unsigned long mflags; unsigned long irix_trampoline; /* Wheee... */ unsigned long irix_oldctx; struct mips_abi *abi; }; -#define MF_ABI_MASK (MF_32BIT_REGS | MF_32BIT_ADDR) -#define MF_O32 (MF_32BIT_REGS | MF_32BIT_ADDR) -#define MF_N32 MF_32BIT_ADDR -#define MF_N64 0 - #ifdef CONFIG_MIPS_MT_FPAFF #define FPAFF_INIT \ .emulated_fp = 0, \ @@ -200,10 +190,6 @@ struct thread_struct { .cp0_baduaddr = 0, \ .error_code = 0, \ .trap_no = 0, \ - /* \ - * For now the default is to fix address errors \ - */ \ - .mflags = MF_FIXADE, \ .irix_trampoline = 0, \ .irix_oldctx = 0, \ } diff --git a/include/asm-mips/seccomp.h b/include/asm-mips/seccomp.h new file mode 100644 index 000000000000..36ed44070256 --- /dev/null +++ b/include/asm-mips/seccomp.h @@ -0,0 +1,37 @@ +#ifndef __ASM_SECCOMP_H + +#include +#include + +#define __NR_seccomp_read __NR_read +#define __NR_seccomp_write __NR_write +#define __NR_seccomp_exit __NR_exit +#define __NR_seccomp_sigreturn __NR_rt_sigreturn + +/* + * Kludge alert: + * + * The generic seccomp code currently allows only a single compat ABI. Until + * this is fixed we priorize O32 as the compat ABI over N32. + */ +#ifdef CONFIG_MIPS32_O32 + +#define TIF_32BIT TIF_32BIT_REGS + +#define __NR_seccomp_read_32 4003 +#define __NR_seccomp_write_32 4004 +#define __NR_seccomp_exit_32 4001 +#define __NR_seccomp_sigreturn_32 4193 /* rt_sigreturn */ + +#elif defined(CONFIG_MIPS32_N32) + +#define TIF_32BIT _TIF_32BIT_ADDR + +#define __NR_seccomp_read_32 6000 +#define __NR_seccomp_write_32 6001 +#define __NR_seccomp_exit_32 6058 +#define __NR_seccomp_sigreturn_32 6211 /* rt_sigreturn */ + +#endif /* CONFIG_MIPS32_O32 */ + +#endif /* __ASM_SECCOMP_H */ diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h index 8d0b1cd4a45e..357251f42518 100644 --- a/include/asm-mips/system.h +++ b/include/asm-mips/system.h @@ -46,10 +46,12 @@ struct task_struct; #define __mips_mt_fpaff_switch_to(prev) \ do { \ + struct thread_info *__prev_ti = task_thread_info(prev); \ + \ if (cpu_has_fpu && \ - (prev->thread.mflags & MF_FPUBOUND) && \ - (!(KSTK_STATUS(prev) & ST0_CU1))) { \ - prev->thread.mflags &= ~MF_FPUBOUND; \ + test_ti_thread_flag(__prev_ti, TIF_FPUBOUND) && \ + (!(KSTK_STATUS(prev) & ST0_CU1))) { \ + clear_ti_thread_flag(__prev_ti, TIF_FPUBOUND); \ prev->cpus_allowed = prev->thread.user_cpus_allowed; \ } \ next->thread.emulated_fp = 0; \ diff --git a/include/asm-mips/thread_info.h b/include/asm-mips/thread_info.h index fbcda8204473..9676e7d9f52d 100644 --- a/include/asm-mips/thread_info.h +++ b/include/asm-mips/thread_info.h @@ -46,7 +46,7 @@ struct thread_info { { \ .task = &tsk, \ .exec_domain = &default_exec_domain, \ - .flags = 0, \ + .flags = _TIF_FIXADE, \ .cpu = 0, \ .preempt_count = 1, \ .addr_limit = KERNEL_DS, \ @@ -119,6 +119,11 @@ register struct thread_info *__current_thread_info __asm__("$28"); #define TIF_POLLING_NRFLAG 17 /* true if poll_idle() is polling TIF_NEED_RESCHED */ #define TIF_MEMDIE 18 #define TIF_FREEZE 19 +#define TIF_FIXADE 20 /* Fix address errors in software */ +#define TIF_LOGADE 21 /* Log address errors to syslog */ +#define TIF_32BIT_REGS 22 /* also implies 16/32 fprs */ +#define TIF_32BIT_ADDR 23 /* 32-bit address space (o32/n32) */ +#define TIF_FPUBOUND 24 /* thread bound to FPU-full CPU set */ #define TIF_SYSCALL_TRACE 31 /* syscall trace active */ #define _TIF_SYSCALL_TRACE (1<