diff options
Diffstat (limited to 'arch/um/os-Linux/sys-i386')
-rw-r--r-- | arch/um/os-Linux/sys-i386/Makefile | 4 | ||||
-rw-r--r-- | arch/um/os-Linux/sys-i386/registers.c | 129 |
2 files changed, 31 insertions, 102 deletions
diff --git a/arch/um/os-Linux/sys-i386/Makefile b/arch/um/os-Linux/sys-i386/Makefile index 37806621b25..a841262c594 100644 --- a/arch/um/os-Linux/sys-i386/Makefile +++ b/arch/um/os-Linux/sys-i386/Makefile @@ -1,9 +1,9 @@ # -# Copyright (C) 2000 Jeff Dike (jdike@karaya.com) +# Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) # Licensed under the GPL # -obj-$(CONFIG_MODE_SKAS) = registers.o signal.o tls.o +obj-y = registers.o signal.o tls.o USER_OBJS := $(obj-y) diff --git a/arch/um/os-Linux/sys-i386/registers.c b/arch/um/os-Linux/sys-i386/registers.c index 84b44f9cd42..d1997ca76e5 100644 --- a/arch/um/os-Linux/sys-i386/registers.c +++ b/arch/um/os-Linux/sys-i386/registers.c @@ -1,144 +1,73 @@ /* * Copyright (C) 2004 PathScale, Inc + * Copyright (C) 2004 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) * Licensed under the GPL */ #include <errno.h> -#include <string.h> -#include "sysdep/ptrace_user.h" -#include "sysdep/ptrace.h" -#include "uml-config.h" -#include "skas_ptregs.h" -#include "registers.h" +#include "kern_constants.h" #include "longjmp.h" #include "user.h" +#include "sysdep/ptrace_user.h" -/* These are set once at boot time and not changed thereafter */ - -static unsigned long exec_regs[MAX_REG_NR]; -static unsigned long exec_fp_regs[HOST_FP_SIZE]; -static unsigned long exec_fpx_regs[HOST_XFP_SIZE]; -static int have_fpx_regs = 1; - -void init_thread_registers(union uml_pt_regs *to) -{ - memcpy(to->skas.regs, exec_regs, sizeof(to->skas.regs)); - memcpy(to->skas.fp, exec_fp_regs, sizeof(to->skas.fp)); - if(have_fpx_regs) - memcpy(to->skas.xfp, exec_fpx_regs, sizeof(to->skas.xfp)); -} - -/* XXX These need to use [GS]ETFPXREGS and copy_sc_{to,from}_user_skas needs - * to pass in a sufficiently large buffer - */ int save_fp_registers(int pid, unsigned long *fp_regs) { - if(ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0) + if (ptrace(PTRACE_GETFPREGS, pid, 0, fp_regs) < 0) return -errno; return 0; } int restore_fp_registers(int pid, unsigned long *fp_regs) { - if(ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0) + if (ptrace(PTRACE_SETFPREGS, pid, 0, fp_regs) < 0) return -errno; return 0; } -static int move_registers(int pid, int int_op, union uml_pt_regs *regs, - int fp_op, unsigned long *fp_regs) +int save_fpx_registers(int pid, unsigned long *fp_regs) { - if(ptrace(int_op, pid, 0, regs->skas.regs) < 0) - return -errno; - - if(ptrace(fp_op, pid, 0, fp_regs) < 0) + if (ptrace(PTRACE_GETFPXREGS, pid, 0, fp_regs) < 0) return -errno; - return 0; } -void save_registers(int pid, union uml_pt_regs *regs) +int restore_fpx_registers(int pid, unsigned long *fp_regs) { - unsigned long *fp_regs; - int err, fp_op; - - if(have_fpx_regs){ - fp_op = PTRACE_GETFPXREGS; - fp_regs = regs->skas.xfp; - } - else { - fp_op = PTRACE_GETFPREGS; - fp_regs = regs->skas.fp; - } - - err = move_registers(pid, PTRACE_GETREGS, regs, fp_op, fp_regs); - if(err) - panic("save_registers - saving registers failed, errno = %d\n", - -err); + if (ptrace(PTRACE_SETFPXREGS, pid, 0, fp_regs) < 0) + return -errno; + return 0; } -void restore_registers(int pid, union uml_pt_regs *regs) +unsigned long get_thread_reg(int reg, jmp_buf *buf) { - unsigned long *fp_regs; - int err, fp_op; - - if(have_fpx_regs){ - fp_op = PTRACE_SETFPXREGS; - fp_regs = regs->skas.xfp; - } - else { - fp_op = PTRACE_SETFPREGS; - fp_regs = regs->skas.fp; + switch (reg) { + case EIP: + return buf[0]->__eip; + case UESP: + return buf[0]->__esp; + case EBP: + return buf[0]->__ebp; + default: + printk(UM_KERN_ERR "get_thread_regs - unknown register %d\n", + reg); + return 0; } - - err = move_registers(pid, PTRACE_SETREGS, regs, fp_op, fp_regs); - if(err) - panic("restore_registers - saving registers failed, " - "errno = %d\n", -err); } -void init_registers(int pid) +int have_fpx_regs = 1; + +void arch_init_registers(int pid) { + unsigned long fpx_regs[HOST_XFP_SIZE]; int err; - memset(exec_regs, 0, sizeof(exec_regs)); - err = ptrace(PTRACE_GETREGS, pid, 0, exec_regs); - if(err) - panic("check_ptrace : PTRACE_GETREGS failed, errno = %d", - errno); - - errno = 0; - err = ptrace(PTRACE_GETFPXREGS, pid, 0, exec_fpx_regs); + err = ptrace(PTRACE_GETFPXREGS, pid, 0, fpx_regs); if(!err) return; + if(errno != EIO) panic("check_ptrace : PTRACE_GETFPXREGS failed, errno = %d", errno); have_fpx_regs = 0; - - err = ptrace(PTRACE_GETFPREGS, pid, 0, exec_fp_regs); - if(err) - panic("check_ptrace : PTRACE_GETFPREGS failed, errno = %d", - errno); -} - -void get_safe_registers(unsigned long *regs, unsigned long *fp_regs) -{ - memcpy(regs, exec_regs, sizeof(exec_regs)); - if(fp_regs != NULL) - memcpy(fp_regs, exec_fp_regs, - HOST_FP_SIZE * sizeof(unsigned long)); -} - -unsigned long get_thread_reg(int reg, jmp_buf *buf) -{ - switch(reg){ - case EIP: return buf[0]->__eip; - case UESP: return buf[0]->__esp; - case EBP: return buf[0]->__ebp; - default: - printk("get_thread_regs - unknown register %d\n", reg); - return 0; - } } |