diff options
| -rw-r--r-- | arch/x86/kernel/ptrace.c | 130 |
1 files changed, 128 insertions, 2 deletions
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c index 509804957f5..d56aa18309f 100644 --- a/arch/x86/kernel/ptrace.c +++ b/arch/x86/kernel/ptrace.c @@ -215,14 +215,14 @@ static int set_segment_reg(struct task_struct *task, #ifdef CONFIG_IA32_EMULATION if (test_tsk_thread_flag(task, TIF_IA32)) task_pt_regs(task)->cs = value; - break; #endif + break; case offsetof(struct user_regs_struct,ss): #ifdef CONFIG_IA32_EMULATION if (test_tsk_thread_flag(task, TIF_IA32)) task_pt_regs(task)->ss = value; - break; #endif + break; } return 0; @@ -634,6 +634,132 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data) return ret; } +#ifdef CONFIG_IA32_EMULATION + +#include <asm/user32.h> + +#define R32(l,q) \ + case offsetof(struct user32, regs.l): \ + regs->q = value; break + +#define SEG32(rs) \ + case offsetof(struct user32, regs.rs): \ + return set_segment_reg(child, \ + offsetof(struct user_regs_struct, rs), \ + value); \ + break + +static int putreg32(struct task_struct *child, unsigned regno, u32 value) +{ + struct pt_regs *regs = task_pt_regs(child); + + switch (regno) { + + SEG32(cs); + SEG32(ds); + SEG32(es); + SEG32(fs); + SEG32(gs); + SEG32(ss); + + R32(ebx, bx); + R32(ecx, cx); + R32(edx, dx); + R32(edi, di); + R32(esi, si); + R32(ebp, bp); + R32(eax, ax); + R32(orig_eax, orig_ax); + R32(eip, ip); + R32(esp, sp); + + case offsetof(struct user32, regs.eflags): + return set_flags(child, value); + + case offsetof(struct user32, u_debugreg[0]) ... + offsetof(struct user32, u_debugreg[7]): + regno -= offsetof(struct user32, u_debugreg[0]); + return ptrace_set_debugreg(child, regno / 4, value); + + default: + if (regno > sizeof(struct user32) || (regno & 3)) + return -EIO; + + /* + * Other dummy fields in the virtual user structure + * are ignored + */ + break; + } + return 0; +} + +#undef R32 +#undef SEG32 + +#define R32(l,q) \ + case offsetof(struct user32, regs.l): \ + *val = regs->q; break + +#define SEG32(rs) \ + case offsetof(struct user32, regs.rs): \ + *val = get_segment_reg(child, \ + offsetof(struct user_regs_struct, rs)); \ + break + +static int getreg32(struct task_struct *child, unsigned regno, u32 *val) +{ + struct pt_regs *regs = task_pt_regs(child); + + switch (regno) { + + SEG32(ds); + SEG32(es); + SEG32(fs); + SEG32(gs); + + R32(cs, cs); + R32(ss, ss); + R32(ebx, bx); + R32(ecx, cx); + R32(edx, dx); + R32(edi, di); + R32(esi, si); + R32(ebp, bp); + R32(eax, ax); + R32(orig_eax, orig_ax); + R32(eip, ip); + R32(esp, sp); + + case offsetof(struct user32, regs.eflags): + *val = get_flags(child); + break; + + case offsetof(struct user32, u_debugreg[0]) ... + offsetof(struct user32, u_debugreg[7]): + regno -= offsetof(struct user32, u_debugreg[0]); + *val = ptrace_get_debugreg(child, regno / 4); + break; + + default: + if (regno > sizeof(struct user32) || (regno & 3)) + return -EIO; + + /* + * Other dummy fields in the virtual user structure + * are ignored + */ + *val = 0; + break; + } + return 0; +} + +#undef R32 +#undef SEG32 + +#endif /* CONFIG_IA32_EMULATION */ + #ifdef CONFIG_X86_32 void send_sigtrap(struct task_struct *tsk, struct pt_regs *regs, int error_code) |