Differential D14856 Diff 41294 head/sys/amd64/linux32/linux32_sysvec.c

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head/sys/amd64/linux32/linux32_sysvec.c

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

#define AUXARGS_ENTRY_32(pos, id, val) \		#define AUXARGS_ENTRY_32(pos, id, val) \
do { \		do { \
suword32(pos++, id); \		suword32(pos++, id); \
suword32(pos++, val); \		suword32(pos++, val); \
} while (0)		} while (0)

#if BYTE_ORDER == LITTLE_ENDIAN
#define SHELLMAGIC 0x2123 /* #! */
#else
#define SHELLMAGIC 0x2321
#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
* bogus than using ldebug(sigreturn).		* bogus than using ldebug(sigreturn).
*/		*/
#define LINUX32_SYS_linux_rt_sendsig 0		#define LINUX32_SYS_linux_rt_sendsig 0
#define LINUX32_SYS_linux_sendsig 0		#define LINUX32_SYS_linux_sendsig 0

const char *linux_kplatform;		const char *linux_kplatform;
static int linux_szsigcode;		static int linux_szsigcode;
static vm_object_t linux_shared_page_obj;		static vm_object_t linux_shared_page_obj;
static char *linux_shared_page_mapping;		static char *linux_shared_page_mapping;
extern char _binary_linux32_locore_o_start;		extern char _binary_linux32_locore_o_start;
extern char _binary_linux32_locore_o_end;		extern char _binary_linux32_locore_o_end;

extern struct sysent linux32_sysent[LINUX32_SYS_MAXSYSCALL];		extern struct sysent linux32_sysent[LINUX32_SYS_MAXSYSCALL];

SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);		SET_DECLARE(linux_ioctl_handler_set, struct linux_ioctl_handler);

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 register_t linux_copyout_strings(struct image_params imgp);		static register_t linux_copyout_strings(struct image_params imgp);
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 void linux32_fixlimit(struct rlimit *rl, int which);		static void linux32_fixlimit(struct rlimit *rl, int which);
static bool linux32_trans_osrel(const Elf_Note note, int32_t osrel);		static bool linux32_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);

#define LINUX_T_UNKNOWN 255		#define LINUX_T_UNKNOWN 255
▲ Show 20 Lines • Show All 574 Lines • ▼ Show 20 Lines	linux32_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_rdx;		td->td_retval[1] = frame->tf_rdx;

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);
}		}

/*		/*
* Clear registers on exec		* Clear registers on exec
* XXX copied from ia32_signal.c.		* XXX copied from ia32_signal.c.
*/		*/
static void		static void
linux_exec_setregs(struct thread td, struct image_params imgp, u_long stack)		linux_exec_setregs(struct thread td, struct image_params imgp, u_long stack)
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