Date: Tue, 22 Dec 2009 20:05:09 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r200864 - in stable/7/sys: compat/ia32 kern sys Message-ID: <200912222005.nBMK59on074616@svn.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: kib Date: Tue Dec 22 20:05:09 2009 New Revision: 200864 URL: http://svn.freebsd.org/changeset/base/200864 Log: MFC r189927: Supply AT_EXECPATH auxinfo entry to the interpreter, both for native and compat32 binaries. Note that the merge was edited due to fexecve(2) support not present in stable/7. Tested by: bms, Mykola Dzham <freebsd levsha org ua> Modified: stable/7/sys/compat/ia32/ia32_sysvec.c stable/7/sys/kern/imgact_elf.c stable/7/sys/kern/kern_exec.c stable/7/sys/sys/imgact.h Directory Properties: stable/7/sys/ (props changed) stable/7/sys/cddl/contrib/opensolaris/ (props changed) stable/7/sys/contrib/dev/acpica/ (props changed) stable/7/sys/contrib/pf/ (props changed) Modified: stable/7/sys/compat/ia32/ia32_sysvec.c ============================================================================== --- stable/7/sys/compat/ia32/ia32_sysvec.c Tue Dec 22 20:02:06 2009 (r200863) +++ stable/7/sys/compat/ia32/ia32_sysvec.c Tue Dec 22 20:05:09 2009 (r200864) @@ -203,15 +203,21 @@ ia32_copyout_strings(struct image_params char *stringp, *destp; u_int32_t *stack_base; struct freebsd32_ps_strings *arginfo; + size_t execpath_len; int szsigcode; /* * Calculate string base and vector table pointers. * Also deal with signal trampoline code for this exec type. */ + if (imgp->execpath != NULL && imgp->auxargs != NULL) + execpath_len = strlen(imgp->execpath) + 1; + else + execpath_len = 0; arginfo = (struct freebsd32_ps_strings *)FREEBSD32_PS_STRINGS; szsigcode = *(imgp->proc->p_sysent->sv_szsigcode); destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE - + roundup(execpath_len, sizeof(char *)) - roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *)); /* @@ -222,6 +228,15 @@ ia32_copyout_strings(struct image_params ((caddr_t)arginfo - szsigcode), szsigcode); /* + * Copy the image path for the rtld. + */ + if (execpath_len != 0) { + imgp->execpathp = (uintptr_t)arginfo - szsigcode - execpath_len; + copyout(imgp->execpath, (void *)imgp->execpathp, + execpath_len); + } + + /* * If we have a valid auxargs ptr, prepare some room * on the stack. */ @@ -237,9 +252,9 @@ ia32_copyout_strings(struct image_params * the arg and env vector sets,and imgp->auxarg_size is room * for argument of Runtime loader. */ - vectp = (u_int32_t *) (destp - (imgp->args->argc + imgp->args->envc + 2 + - imgp->auxarg_size) * sizeof(u_int32_t)); - + vectp = (u_int32_t *) (destp - (imgp->args->argc + + imgp->args->envc + 2 + imgp->auxarg_size + execpath_len) * + sizeof(u_int32_t)); } else /* * The '+ 2' is for the null pointers at the end of each of Modified: stable/7/sys/kern/imgact_elf.c ============================================================================== --- stable/7/sys/kern/imgact_elf.c Tue Dec 22 20:02:06 2009 (r200863) +++ stable/7/sys/kern/imgact_elf.c Tue Dec 22 20:05:09 2009 (r200864) @@ -953,6 +953,8 @@ __elfN(freebsd_fixup)(register_t **stack AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); AUXARGS_ENTRY(pos, AT_BASE, args->base); + if (imgp->execpathp != 0) + AUXARGS_ENTRY(pos, AT_EXECPATH, imgp->execpathp); AUXARGS_ENTRY(pos, AT_NULL, 0); free(imgp->auxargs, M_TEMP); Modified: stable/7/sys/kern/kern_exec.c ============================================================================== --- stable/7/sys/kern/kern_exec.c Tue Dec 22 20:02:06 2009 (r200863) +++ stable/7/sys/kern/kern_exec.c Tue Dec 22 20:05:09 2009 (r200864) @@ -360,6 +360,8 @@ do_execve(td, args, mac_p) imgp->ps_strings = 0; imgp->auxarg_size = 0; imgp->args = args; + imgp->execpath = imgp->freepath = NULL; + imgp->execpathp = 0; #ifdef MAC error = mac_execve_enter(imgp, mac_p); @@ -486,6 +488,10 @@ interpret: * of the sv_copyout_strings/sv_fixup operations require the vnode. */ VOP_UNLOCK(imgp->vp, 0, td); + + if (imgp->auxargs != NULL) + vn_fullpath(td, imgp->vp, &imgp->execpath, &imgp->freepath); + /* * Copy out strings (args and env) and initialize stack base */ @@ -814,6 +820,8 @@ exec_fail_dealloc: if (imgp->object != NULL) vm_object_deallocate(imgp->object); + free(imgp->freepath, M_TEMP); + if (error == 0) { /* * Stop the process here if its stop event mask has @@ -1125,18 +1133,24 @@ exec_copyout_strings(imgp) register_t *stack_base; struct ps_strings *arginfo; struct proc *p; + size_t execpath_len; int szsigcode; /* * Calculate string base and vector table pointers. * Also deal with signal trampoline code for this exec type. */ + if (imgp->execpath != NULL && imgp->auxargs != NULL) + execpath_len = strlen(imgp->execpath) + 1; + else + execpath_len = 0; p = imgp->proc; szsigcode = 0; arginfo = (struct ps_strings *)p->p_sysent->sv_psstrings; if (p->p_sysent->sv_szsigcode != NULL) szsigcode = *(p->p_sysent->sv_szsigcode); destp = (caddr_t)arginfo - szsigcode - SPARE_USRSPACE - + roundup(execpath_len, sizeof(char *)) - roundup((ARG_MAX - imgp->args->stringspace), sizeof(char *)); /* @@ -1147,6 +1161,15 @@ exec_copyout_strings(imgp) szsigcode), szsigcode); /* + * Copy the image path for the rtld. + */ + if (execpath_len != 0) { + imgp->execpathp = (uintptr_t)arginfo - szsigcode - execpath_len; + copyout(imgp->execpath, (void *)imgp->execpathp, + execpath_len); + } + + /* * If we have a valid auxargs ptr, prepare some room * on the stack. */ @@ -1163,9 +1186,8 @@ exec_copyout_strings(imgp) * for argument of Runtime loader. */ vectp = (char **)(destp - (imgp->args->argc + - imgp->args->envc + 2 + imgp->auxarg_size) * + imgp->args->envc + 2 + imgp->auxarg_size + execpath_len) * sizeof(char *)); - } else { /* * The '+ 2' is for the null pointers at the end of each of Modified: stable/7/sys/sys/imgact.h ============================================================================== --- stable/7/sys/sys/imgact.h Tue Dec 22 20:02:06 2009 (r200863) +++ stable/7/sys/sys/imgact.h Tue Dec 22 20:05:09 2009 (r200864) @@ -65,6 +65,9 @@ struct image_params { size_t auxarg_size; struct image_args *args; /* system call arguments */ struct sysentvec *sysent; /* system entry vector */ + char *execpath; + unsigned long execpathp; + char *freepath; }; #ifdef _KERNEL
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200912222005.nBMK59on074616>