From f0f2d6536e3515b5b1b7ae97dc8f176860c8c2ce Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Mon, 26 Jun 2006 13:56:34 +0200 Subject: [PATCH] [PATCH] x86_64: Implement compat functions for PTRACE_SETSIGINFO/GETSIGINFO Previously we would just silently provide 64 bit services for this to 32bit processes. I also added all the other cases explicitely to the ptrace compat wrapper to make sure this doesn't happen again. And removed one bogus check in the wrapper. Signed-off-by: Andi Kleen Signed-off-by: Linus Torvalds --- arch/x86_64/ia32/ptrace32.c | 41 +++++++++++++++++++++++++++++++------ 1 file changed, 35 insertions(+), 6 deletions(-) diff --git a/arch/x86_64/ia32/ptrace32.c b/arch/x86_64/ia32/ptrace32.c index 23a4515a73..4defe63f59 100644 --- a/arch/x86_64/ia32/ptrace32.c +++ b/arch/x86_64/ia32/ptrace32.c @@ -27,6 +27,7 @@ #include #include #include +#include /* * Determines which flags the user has access to [1 = access, 0 = no access]. @@ -199,6 +200,24 @@ static int getreg32(struct task_struct *child, unsigned regno, u32 *val) #undef R32 +static long ptrace32_siginfo(unsigned request, u32 pid, u32 addr, u32 data) +{ + int ret; + compat_siginfo_t *si32 = (compat_siginfo_t *)compat_ptr(data); + siginfo_t *si = compat_alloc_user_space(sizeof(siginfo_t)); + if (request == PTRACE_SETSIGINFO) { + ret = copy_siginfo_from_user32(si, si32); + if (ret) + return ret; + } + ret = sys_ptrace(request, pid, addr, (unsigned long)si); + if (ret) + return ret; + if (request == PTRACE_GETSIGINFO) + ret = copy_siginfo_to_user32(si32, si); + return ret; +} + asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) { struct task_struct *child; @@ -208,9 +227,19 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) __u32 val; switch (request) { - default: + case PTRACE_TRACEME: + case PTRACE_ATTACH: + case PTRACE_KILL: + case PTRACE_CONT: + case PTRACE_SINGLESTEP: + case PTRACE_DETACH: + case PTRACE_SYSCALL: + case PTRACE_SETOPTIONS: return sys_ptrace(request, pid, addr, data); + default: + return -EINVAL; + case PTRACE_PEEKTEXT: case PTRACE_PEEKDATA: case PTRACE_POKEDATA: @@ -225,10 +254,11 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) case PTRACE_GETFPXREGS: case PTRACE_GETEVENTMSG: break; - } - if (request == PTRACE_TRACEME) - return ptrace_traceme(); + case PTRACE_SETSIGINFO: + case PTRACE_GETSIGINFO: + return ptrace32_siginfo(request, pid, addr, data); + } child = ptrace_get_task_struct(pid); if (IS_ERR(child)) @@ -349,8 +379,7 @@ asmlinkage long sys32_ptrace(long request, u32 pid, u32 addr, u32 data) break; default: - ret = -EINVAL; - break; + BUG(); } out: -- 2.39.5