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path: root/sys/i386/linux/linux_sysvec.c
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Diffstat (limited to 'sys/i386/linux/linux_sysvec.c')
-rw-r--r--sys/i386/linux/linux_sysvec.c65
1 files changed, 54 insertions, 11 deletions
diff --git a/sys/i386/linux/linux_sysvec.c b/sys/i386/linux/linux_sysvec.c
index 970bd05120e6..730e7efc9572 100644
--- a/sys/i386/linux/linux_sysvec.c
+++ b/sys/i386/linux/linux_sysvec.c
@@ -71,6 +71,7 @@ __FBSDID("$FreeBSD$");
#include <compat/linux/linux_misc.h>
#include <compat/linux/linux_signal.h>
#include <compat/linux/linux_util.h>
+#include <compat/linux/linux_vdso.h>
MODULE_VERSION(linux, 1);
@@ -93,8 +94,11 @@ MALLOC_DEFINE(M_LINUX, "linux", "Linux mode structures");
#define LINUX_PS_STRINGS (LINUX_USRSTACK - sizeof(struct ps_strings))
-extern char linux_sigcode[];
-extern int linux_szsigcode;
+static int linux_szsigcode;
+static vm_object_t linux_shared_page_obj;
+static char *linux_shared_page_mapping;
+extern char _binary_linux_locore_o_start;
+extern char _binary_linux_locore_o_end;
extern struct sysent linux_sysent[LINUX_SYS_MAXSYSCALL];
@@ -110,6 +114,8 @@ static void exec_linux_setregs(struct thread *td,
struct image_params *imgp, u_long stack);
static register_t *linux_copyout_strings(struct image_params *imgp);
static boolean_t linux_trans_osrel(const Elf_Note *note, int32_t *osrel);
+static void linux_vdso_install(void *param);
+static void linux_vdso_deinstall(void *param);
static int linux_szplatform;
const char *linux_platform;
@@ -199,6 +205,10 @@ static int _bsd_to_linux_trapcode[] = {
_bsd_to_linux_trapcode[(code)]: \
LINUX_T_UNKNOWN)
+LINUX_VDSO_SYM_INTPTR(linux_sigcode);
+LINUX_VDSO_SYM_INTPTR(linux_rt_sigcode);
+LINUX_VDSO_SYM_INTPTR(linux_vsyscall);
+
/*
* If FreeBSD & Linux have a difference of opinion about what a trap
* means, deal with it here.
@@ -255,6 +265,9 @@ elf_linux_fixup(register_t **stack_base, struct image_params *imgp)
args = (Elf32_Auxargs *)imgp->auxargs;
pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2);
+ AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO_EHDR,
+ imgp->proc->p_sysent->sv_shared_page_base);
+ AUXARGS_ENTRY(pos, LINUX_AT_SYSINFO, linux_vsyscall);
AUXARGS_ENTRY(pos, LINUX_AT_HWCAP, cpu_feature);
/*
@@ -399,10 +412,6 @@ linux_copyout_strings(struct image_params *imgp)
return (stack_base);
}
-
-
-extern unsigned long linux_sznonrtsigcode;
-
static void
linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
{
@@ -478,6 +487,7 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
frame.sf_sc.uc_mcontext.sc_esi = regs->tf_esi;
frame.sf_sc.uc_mcontext.sc_ebp = regs->tf_ebp;
frame.sf_sc.uc_mcontext.sc_ebx = regs->tf_ebx;
+ frame.sf_sc.uc_mcontext.sc_esp = regs->tf_esp;
frame.sf_sc.uc_mcontext.sc_edx = regs->tf_edx;
frame.sf_sc.uc_mcontext.sc_ecx = regs->tf_ecx;
frame.sf_sc.uc_mcontext.sc_eax = regs->tf_eax;
@@ -515,7 +525,7 @@ linux_rt_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
* Build context to run handler in.
*/
regs->tf_esp = (int)fp;
- regs->tf_eip = p->p_sysent->sv_sigcode_base + linux_sznonrtsigcode;
+ regs->tf_eip = linux_rt_sigcode;
regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D);
regs->tf_cs = _ucodesel;
regs->tf_ds = _udatasel;
@@ -606,6 +616,7 @@ linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
frame.sf_sc.sc_esi = regs->tf_esi;
frame.sf_sc.sc_ebp = regs->tf_ebp;
frame.sf_sc.sc_ebx = regs->tf_ebx;
+ frame.sf_sc.sc_esp = regs->tf_esp;
frame.sf_sc.sc_edx = regs->tf_edx;
frame.sf_sc.sc_ecx = regs->tf_ecx;
frame.sf_sc.sc_eax = regs->tf_eax;
@@ -634,7 +645,7 @@ linux_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
* Build context to run handler in.
*/
regs->tf_esp = (int)fp;
- regs->tf_eip = p->p_sysent->sv_sigcode_base;
+ regs->tf_eip = linux_sigcode;
regs->tf_eflags &= ~(PSL_T | PSL_VM | PSL_D);
regs->tf_cs = _ucodesel;
regs->tf_ds = _udatasel;
@@ -950,7 +961,7 @@ struct sysentvec linux_sysvec = {
.sv_transtrap = translate_traps,
.sv_fixup = linux_fixup,
.sv_sendsig = linux_sendsig,
- .sv_sigcode = linux_sigcode,
+ .sv_sigcode = &_binary_linux_locore_o_start,
.sv_szsigcode = &linux_szsigcode,
.sv_prepsyscall = NULL,
.sv_name = "Linux a.out",
@@ -989,7 +1000,7 @@ struct sysentvec elf_linux_sysvec = {
.sv_transtrap = translate_traps,
.sv_fixup = elf_linux_fixup,
.sv_sendsig = linux_sendsig,
- .sv_sigcode = linux_sigcode,
+ .sv_sigcode = &_binary_linux_locore_o_start,
.sv_szsigcode = &linux_szsigcode,
.sv_prepsyscall = NULL,
.sv_name = "Linux ELF",
@@ -1015,7 +1026,39 @@ struct sysentvec elf_linux_sysvec = {
.sv_schedtail = linux_schedtail,
.sv_thread_detach = linux_thread_detach,
};
-INIT_SYSENTVEC(elf_sysvec, &elf_linux_sysvec);
+
+static void
+linux_vdso_install(void *param)
+{
+
+ linux_szsigcode = (&_binary_linux_locore_o_end -
+ &_binary_linux_locore_o_start);
+
+ if (linux_szsigcode > elf_linux_sysvec.sv_shared_page_len)
+ panic("Linux invalid vdso size\n");
+
+ __elfN(linux_vdso_fixup)(&elf_linux_sysvec);
+
+ linux_shared_page_obj = __elfN(linux_shared_page_init)
+ (&linux_shared_page_mapping);
+
+ __elfN(linux_vdso_reloc)(&elf_linux_sysvec, LINUX_SHAREDPAGE);
+
+ bcopy(elf_linux_sysvec.sv_sigcode, linux_shared_page_mapping,
+ linux_szsigcode);
+ elf_linux_sysvec.sv_shared_page_obj = linux_shared_page_obj;
+}
+SYSINIT(elf_linux_vdso_init, SI_SUB_EXEC, SI_ORDER_ANY,
+ (sysinit_cfunc_t)linux_vdso_install, NULL);
+
+static void
+linux_vdso_deinstall(void *param)
+{
+
+ __elfN(linux_shared_page_fini)(linux_shared_page_obj);
+};
+SYSUNINIT(elf_linux_vdso_uninit, SI_SUB_EXEC, SI_ORDER_FIRST,
+ (sysinit_cfunc_t)linux_vdso_deinstall, NULL);
static char GNU_ABI_VENDOR[] = "GNU";
static int GNULINUX_ABI_DESC = 0;