Differential D14856 Diff 41294 head/sys/i386/linux/linux_sysvec.c

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head/sys/i386/linux/linux_sysvec.c

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#include <compat/linux/linux_mib.h>		#include <compat/linux/linux_mib.h>
#include <compat/linux/linux_misc.h>		#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_signal.h>		#include <compat/linux/linux_signal.h>
#include <compat/linux/linux_util.h>		#include <compat/linux/linux_util.h>
#include <compat/linux/linux_vdso.h>		#include <compat/linux/linux_vdso.h>

MODULE_VERSION(linux, 1);		MODULE_VERSION(linux, 1);

#if BYTE_ORDER == LITTLE_ENDIAN
#define SHELLMAGIC 0x2123 /* #! */
#else
#define SHELLMAGIC 0x2321
#endif

#if defined(DEBUG)		#if defined(DEBUG)
SYSCTL_PROC(_compat_linux, OID_AUTO, debug, CTLTYPE_STRING \| CTLFLAG_RW, 0, 0,		SYSCTL_PROC(_compat_linux, OID_AUTO, debug, CTLTYPE_STRING \| CTLFLAG_RW, 0, 0,
linux_sysctl_debug, "A", "Linux debugging control");		linux_sysctl_debug, "A", "Linux debugging control");
#endif		#endif

/*		/*
* Allow the sendsig functions to use the ldebug() facility even though they		* Allow the sendsig functions to use the ldebug() facility even though they
* are not syscalls themselves. Map them to syscall 0. This is slightly less		* are not syscalls themselves. Map them to syscall 0. This is slightly less
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SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);		SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);

static int linux_fixup(register_t **stack_base,		static int linux_fixup(register_t **stack_base,
struct image_params *iparams);		struct image_params *iparams);
static int linux_fixup_elf(register_t **stack_base,		static int linux_fixup_elf(register_t **stack_base,
struct image_params *iparams);		struct image_params *iparams);
static void linux_sendsig(sig_t catcher, ksiginfo_t ksi, sigset_t mask);		static void linux_sendsig(sig_t catcher, ksiginfo_t ksi, sigset_t mask);
static int linux_exec_imgact_try(struct image_params *iparams);
static void linux_exec_setregs(struct thread *td,		static void linux_exec_setregs(struct thread *td,
struct image_params *imgp, u_long stack);		struct image_params *imgp, u_long stack);
static register_t linux_copyout_strings(struct image_params imgp);		static register_t linux_copyout_strings(struct image_params imgp);
static bool linux_trans_osrel(const Elf_Note note, int32_t osrel);		static bool linux_trans_osrel(const Elf_Note note, int32_t osrel);
static void linux_vdso_install(void *param);		static void linux_vdso_install(void *param);
static void linux_vdso_deinstall(void *param);		static void linux_vdso_deinstall(void *param);

static int linux_szplatform;		static int linux_szplatform;
▲ Show 20 Lines • Show All 683 Lines • ▼ Show 20 Lines	linux_fetch_syscall_args(struct thread *td)
else		else
sa->callp = &p->p_sysent->sv_table[sa->code];		sa->callp = &p->p_sysent->sv_table[sa->code];
sa->narg = sa->callp->sy_narg;		sa->narg = sa->callp->sy_narg;

td->td_retval[0] = 0;		td->td_retval[0] = 0;
td->td_retval[1] = frame->tf_edx;		td->td_retval[1] = frame->tf_edx;

return (0);		return (0);
}

/*
* If a Linux binary is exec'ing something, try this image activator
* first. We override standard shell script execution in order to
* be able to modify the interpreter path. We only do this if a Linux
* binary is doing the exec, so we do not create an EXEC module for it.
*/
static int
linux_exec_imgact_try(struct image_params *imgp)
{
const char head = (const char )imgp->image_header;
char *rpath;
int error = -1;

/*
* The interpreter for shell scripts run from a Linux binary needs
* to be located in /compat/linux if possible in order to recursively
* maintain Linux path emulation.
*/
if (((const short *)head)[0] == SHELLMAGIC) {
/*
* Run our normal shell image activator. If it succeeds then
* attempt to use the alternate path for the interpreter. If
* an alternate path is found, use our stringspace to store it.
*/
if ((error = exec_shell_imgact(imgp)) == 0) {
linux_emul_convpath(FIRST_THREAD_IN_PROC(imgp->proc),
imgp->interpreter_name, UIO_SYSSPACE, &rpath, 0,
AT_FDCWD);
if (rpath != NULL)
imgp->args->fname_buf =
imgp->interpreter_name = rpath;
}
}
return (error);
}		}

/*		/*
* exec_setregs may initialize some registers differently than Linux		* exec_setregs may initialize some registers differently than Linux
* does, thus potentially confusing Linux binaries. If necessary, we		* does, thus potentially confusing Linux binaries. If necessary, we
* override the exec_setregs default(s) here.		* override the exec_setregs default(s) here.
*/		*/
static void		static void
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