summaryrefslogtreecommitdiffstats
path: root/arch/x86/entry
diff options
context:
space:
mode:
Diffstat (limited to 'arch/x86/entry')
-rw-r--r--arch/x86/entry/Makefile5
-rw-r--r--arch/x86/entry/calling.h115
-rw-r--r--arch/x86/entry/common.c65
-rw-r--r--arch/x86/entry/entry.S3
-rw-r--r--arch/x86/entry/entry_32.S6
-rw-r--r--arch/x86/entry/entry_64.S29
-rw-r--r--arch/x86/entry/entry_64_fred.S131
-rw-r--r--arch/x86/entry/entry_fred.c294
-rw-r--r--arch/x86/entry/thunk_32.S34
-rw-r--r--arch/x86/entry/thunk_64.S33
-rw-r--r--arch/x86/entry/vdso/Makefile60
-rw-r--r--arch/x86/entry/vdso/vma.c57
-rw-r--r--arch/x86/entry/vsyscall/vsyscall_64.c2
13 files changed, 633 insertions, 201 deletions
diff --git a/arch/x86/entry/Makefile b/arch/x86/entry/Makefile
index ca2fe18699..c93e7f5c2a 100644
--- a/arch/x86/entry/Makefile
+++ b/arch/x86/entry/Makefile
@@ -18,6 +18,9 @@ obj-y += vdso/
obj-y += vsyscall/
obj-$(CONFIG_PREEMPTION) += thunk_$(BITS).o
+CFLAGS_entry_fred.o += -fno-stack-protector
+CFLAGS_REMOVE_entry_fred.o += -pg $(CC_FLAGS_FTRACE)
+obj-$(CONFIG_X86_FRED) += entry_64_fred.o entry_fred.o
+
obj-$(CONFIG_IA32_EMULATION) += entry_64_compat.o syscall_32.o
obj-$(CONFIG_X86_X32_ABI) += syscall_x32.o
-
diff --git a/arch/x86/entry/calling.h b/arch/x86/entry/calling.h
index 9f1d94790a..ea81770629 100644
--- a/arch/x86/entry/calling.h
+++ b/arch/x86/entry/calling.h
@@ -65,7 +65,7 @@ For 32-bit we have the following conventions - kernel is built with
* for assembly code:
*/
-.macro PUSH_REGS rdx=%rdx rcx=%rcx rax=%rax save_ret=0
+.macro PUSH_REGS rdx=%rdx rcx=%rcx rax=%rax save_ret=0 unwind_hint=1
.if \save_ret
pushq %rsi /* pt_regs->si */
movq 8(%rsp), %rsi /* temporarily store the return address in %rsi */
@@ -87,14 +87,17 @@ For 32-bit we have the following conventions - kernel is built with
pushq %r13 /* pt_regs->r13 */
pushq %r14 /* pt_regs->r14 */
pushq %r15 /* pt_regs->r15 */
+
+ .if \unwind_hint
UNWIND_HINT_REGS
+ .endif
.if \save_ret
pushq %rsi /* return address on top of stack */
.endif
.endm
-.macro CLEAR_REGS
+.macro CLEAR_REGS clear_bp=1
/*
* Sanitize registers of values that a speculation attack might
* otherwise want to exploit. The lower registers are likely clobbered
@@ -109,7 +112,9 @@ For 32-bit we have the following conventions - kernel is built with
xorl %r10d, %r10d /* nospec r10 */
xorl %r11d, %r11d /* nospec r11 */
xorl %ebx, %ebx /* nospec rbx */
+ .if \clear_bp
xorl %ebp, %ebp /* nospec rbp */
+ .endif
xorl %r12d, %r12d /* nospec r12 */
xorl %r13d, %r13d /* nospec r13 */
xorl %r14d, %r14d /* nospec r14 */
@@ -117,9 +122,9 @@ For 32-bit we have the following conventions - kernel is built with
.endm
-.macro PUSH_AND_CLEAR_REGS rdx=%rdx rcx=%rcx rax=%rax save_ret=0
- PUSH_REGS rdx=\rdx, rcx=\rcx, rax=\rax, save_ret=\save_ret
- CLEAR_REGS
+.macro PUSH_AND_CLEAR_REGS rdx=%rdx rcx=%rcx rax=%rax save_ret=0 clear_bp=1 unwind_hint=1
+ PUSH_REGS rdx=\rdx, rcx=\rcx, rax=\rax, save_ret=\save_ret unwind_hint=\unwind_hint
+ CLEAR_REGS clear_bp=\clear_bp
.endm
.macro POP_REGS pop_rdi=1
@@ -142,10 +147,10 @@ For 32-bit we have the following conventions - kernel is built with
.endif
.endm
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
/*
- * PAGE_TABLE_ISOLATION PGDs are 8k. Flip bit 12 to switch between the two
+ * MITIGATION_PAGE_TABLE_ISOLATION PGDs are 8k. Flip bit 12 to switch between the two
* halves:
*/
#define PTI_USER_PGTABLE_BIT PAGE_SHIFT
@@ -160,7 +165,7 @@ For 32-bit we have the following conventions - kernel is built with
.macro ADJUST_KERNEL_CR3 reg:req
ALTERNATIVE "", "SET_NOFLUSH_BIT \reg", X86_FEATURE_PCID
- /* Clear PCID and "PAGE_TABLE_ISOLATION bit", point CR3 at kernel pagetables: */
+ /* Clear PCID and "MITIGATION_PAGE_TABLE_ISOLATION bit", point CR3 at kernel pagetables: */
andq $(~PTI_USER_PGTABLE_AND_PCID_MASK), \reg
.endm
@@ -173,7 +178,7 @@ For 32-bit we have the following conventions - kernel is built with
.endm
#define THIS_CPU_user_pcid_flush_mask \
- PER_CPU_VAR(cpu_tlbstate) + TLB_STATE_user_pcid_flush_mask
+ PER_CPU_VAR(cpu_tlbstate + TLB_STATE_user_pcid_flush_mask)
.macro SWITCH_TO_USER_CR3 scratch_reg:req scratch_reg2:req
mov %cr3, \scratch_reg
@@ -239,17 +244,19 @@ For 32-bit we have the following conventions - kernel is built with
.Ldone_\@:
.endm
-.macro RESTORE_CR3 scratch_reg:req save_reg:req
+/* Restore CR3 from a kernel context. May restore a user CR3 value. */
+.macro PARANOID_RESTORE_CR3 scratch_reg:req save_reg:req
ALTERNATIVE "jmp .Lend_\@", "", X86_FEATURE_PTI
- ALTERNATIVE "jmp .Lwrcr3_\@", "", X86_FEATURE_PCID
-
/*
- * KERNEL pages can always resume with NOFLUSH as we do
- * explicit flushes.
+ * If CR3 contained the kernel page tables at the paranoid exception
+ * entry, then there is nothing to restore as CR3 is not modified while
+ * handling the exception.
*/
bt $PTI_USER_PGTABLE_BIT, \save_reg
- jnc .Lnoflush_\@
+ jnc .Lend_\@
+
+ ALTERNATIVE "jmp .Lwrcr3_\@", "", X86_FEATURE_PCID
/*
* Check if there's a pending flush for the user ASID we're
@@ -257,25 +264,17 @@ For 32-bit we have the following conventions - kernel is built with
*/
movq \save_reg, \scratch_reg
andq $(0x7FF), \scratch_reg
- bt \scratch_reg, THIS_CPU_user_pcid_flush_mask
- jnc .Lnoflush_\@
-
btr \scratch_reg, THIS_CPU_user_pcid_flush_mask
- jmp .Lwrcr3_\@
+ jc .Lwrcr3_\@
-.Lnoflush_\@:
SET_NOFLUSH_BIT \save_reg
.Lwrcr3_\@:
- /*
- * The CR3 write could be avoided when not changing its value,
- * but would require a CR3 read *and* a scratch register.
- */
movq \save_reg, %cr3
.Lend_\@:
.endm
-#else /* CONFIG_PAGE_TABLE_ISOLATION=n: */
+#else /* CONFIG_MITIGATION_PAGE_TABLE_ISOLATION=n: */
.macro SWITCH_TO_KERNEL_CR3 scratch_reg:req
.endm
@@ -285,7 +284,7 @@ For 32-bit we have the following conventions - kernel is built with
.endm
.macro SAVE_AND_SWITCH_TO_KERNEL_CR3 scratch_reg:req save_reg:req
.endm
-.macro RESTORE_CR3 scratch_reg:req save_reg:req
+.macro PARANOID_RESTORE_CR3 scratch_reg:req save_reg:req
.endm
#endif
@@ -303,7 +302,7 @@ For 32-bit we have the following conventions - kernel is built with
* Assumes x86_spec_ctrl_{base,current} to have SPEC_CTRL_IBRS set.
*/
.macro IBRS_ENTER save_reg
-#ifdef CONFIG_CPU_IBRS_ENTRY
+#ifdef CONFIG_MITIGATION_IBRS_ENTRY
ALTERNATIVE "jmp .Lend_\@", "", X86_FEATURE_KERNEL_IBRS
movl $MSR_IA32_SPEC_CTRL, %ecx
@@ -332,7 +331,7 @@ For 32-bit we have the following conventions - kernel is built with
* regs. Must be called after the last RET.
*/
.macro IBRS_EXIT save_reg
-#ifdef CONFIG_CPU_IBRS_ENTRY
+#ifdef CONFIG_MITIGATION_IBRS_ENTRY
ALTERNATIVE "jmp .Lend_\@", "", X86_FEATURE_KERNEL_IBRS
movl $MSR_IA32_SPEC_CTRL, %ecx
@@ -426,3 +425,63 @@ For 32-bit we have the following conventions - kernel is built with
.endm
#endif /* CONFIG_SMP */
+
+#ifdef CONFIG_X86_64
+
+/* rdi: arg1 ... normal C conventions. rax is saved/restored. */
+.macro THUNK name, func
+SYM_FUNC_START(\name)
+ pushq %rbp
+ movq %rsp, %rbp
+
+ pushq %rdi
+ pushq %rsi
+ pushq %rdx
+ pushq %rcx
+ pushq %rax
+ pushq %r8
+ pushq %r9
+ pushq %r10
+ pushq %r11
+
+ call \func
+
+ popq %r11
+ popq %r10
+ popq %r9
+ popq %r8
+ popq %rax
+ popq %rcx
+ popq %rdx
+ popq %rsi
+ popq %rdi
+ popq %rbp
+ RET
+SYM_FUNC_END(\name)
+ _ASM_NOKPROBE(\name)
+.endm
+
+#else /* CONFIG_X86_32 */
+
+/* put return address in eax (arg1) */
+.macro THUNK name, func, put_ret_addr_in_eax=0
+SYM_CODE_START_NOALIGN(\name)
+ pushl %eax
+ pushl %ecx
+ pushl %edx
+
+ .if \put_ret_addr_in_eax
+ /* Place EIP in the arg1 */
+ movl 3*4(%esp), %eax
+ .endif
+
+ call \func
+ popl %edx
+ popl %ecx
+ popl %eax
+ RET
+ _ASM_NOKPROBE(\name)
+SYM_CODE_END(\name)
+ .endm
+
+#endif
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 6de50b8070..51cc9c7cb9 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -255,6 +255,71 @@ __visible noinstr void do_int80_emulation(struct pt_regs *regs)
instrumentation_end();
syscall_exit_to_user_mode(regs);
}
+
+#ifdef CONFIG_X86_FRED
+/*
+ * A FRED-specific INT80 handler is warranted for the follwing reasons:
+ *
+ * 1) As INT instructions and hardware interrupts are separate event
+ * types, FRED does not preclude the use of vector 0x80 for external
+ * interrupts. As a result, the FRED setup code does not reserve
+ * vector 0x80 and calling int80_is_external() is not merely
+ * suboptimal but actively incorrect: it could cause a system call
+ * to be incorrectly ignored.
+ *
+ * 2) It is called only for handling vector 0x80 of event type
+ * EVENT_TYPE_SWINT and will never be called to handle any external
+ * interrupt (event type EVENT_TYPE_EXTINT).
+ *
+ * 3) FRED has separate entry flows depending on if the event came from
+ * user space or kernel space, and because the kernel does not use
+ * INT insns, the FRED kernel entry handler fred_entry_from_kernel()
+ * falls through to fred_bad_type() if the event type is
+ * EVENT_TYPE_SWINT, i.e., INT insns. So if the kernel is handling
+ * an INT insn, it can only be from a user level.
+ *
+ * 4) int80_emulation() does a CLEAR_BRANCH_HISTORY. While FRED will
+ * likely take a different approach if it is ever needed: it
+ * probably belongs in either fred_intx()/ fred_other() or
+ * asm_fred_entrypoint_user(), depending on if this ought to be done
+ * for all entries from userspace or only system
+ * calls.
+ *
+ * 5) INT $0x80 is the fast path for 32-bit system calls under FRED.
+ */
+DEFINE_FREDENTRY_RAW(int80_emulation)
+{
+ int nr;
+
+ enter_from_user_mode(regs);
+
+ instrumentation_begin();
+ add_random_kstack_offset();
+
+ /*
+ * FRED pushed 0 into regs::orig_ax and regs::ax contains the
+ * syscall number.
+ *
+ * User tracing code (ptrace or signal handlers) might assume
+ * that the regs::orig_ax contains a 32-bit number on invoking
+ * a 32-bit syscall.
+ *
+ * Establish the syscall convention by saving the 32bit truncated
+ * syscall number in regs::orig_ax and by invalidating regs::ax.
+ */
+ regs->orig_ax = regs->ax & GENMASK(31, 0);
+ regs->ax = -ENOSYS;
+
+ nr = syscall_32_enter(regs);
+
+ local_irq_enable();
+ nr = syscall_enter_from_user_mode_work(regs, nr);
+ do_syscall_32_irqs_on(regs, nr);
+
+ instrumentation_end();
+ syscall_exit_to_user_mode(regs);
+}
+#endif
#else /* CONFIG_IA32_EMULATION */
/* Handles int $0x80 on a 32bit kernel */
diff --git a/arch/x86/entry/entry.S b/arch/x86/entry/entry.S
index 0033790499..d9feadffa9 100644
--- a/arch/x86/entry/entry.S
+++ b/arch/x86/entry/entry.S
@@ -10,6 +10,8 @@
#include <asm/segment.h>
#include <asm/cache.h>
+#include "calling.h"
+
.pushsection .noinstr.text, "ax"
SYM_FUNC_START(entry_ibpb)
@@ -43,3 +45,4 @@ EXPORT_SYMBOL_GPL(mds_verw_sel);
.popsection
+THUNK warn_thunk_thunk, __warn_thunk
diff --git a/arch/x86/entry/entry_32.S b/arch/x86/entry/entry_32.S
index fba4276468..d3a814efbf 100644
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -305,7 +305,7 @@
.macro CHECK_AND_APPLY_ESPFIX
#ifdef CONFIG_X86_ESPFIX32
#define GDT_ESPFIX_OFFSET (GDT_ENTRY_ESPFIX_SS * 8)
-#define GDT_ESPFIX_SS PER_CPU_VAR(gdt_page) + GDT_ESPFIX_OFFSET
+#define GDT_ESPFIX_SS PER_CPU_VAR(gdt_page + GDT_ESPFIX_OFFSET)
ALTERNATIVE "jmp .Lend_\@", "", X86_BUG_ESPFIX
@@ -649,10 +649,6 @@ SYM_CODE_START_LOCAL(asm_\cfunc)
SYM_CODE_END(asm_\cfunc)
.endm
-.macro idtentry_sysvec vector cfunc
- idtentry \vector asm_\cfunc \cfunc has_error_code=0
-.endm
-
/*
* Include the defines which emit the idt entries which are shared
* shared between 32 and 64 bit and emit the __irqentry_text_* markers
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index e986331b14..1b5be07f86 100644
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -192,7 +192,7 @@ SYM_FUNC_START(__switch_to_asm)
#ifdef CONFIG_STACKPROTECTOR
movq TASK_stack_canary(%rsi), %rbx
- movq %rbx, PER_CPU_VAR(fixed_percpu_data) + FIXED_stack_canary
+ movq %rbx, PER_CPU_VAR(fixed_percpu_data + FIXED_stack_canary)
#endif
/*
@@ -249,7 +249,13 @@ SYM_CODE_START(ret_from_fork_asm)
* and unwind should work normally.
*/
UNWIND_HINT_REGS
+
+#ifdef CONFIG_X86_FRED
+ ALTERNATIVE "jmp swapgs_restore_regs_and_return_to_usermode", \
+ "jmp asm_fred_exit_user", X86_FEATURE_FRED
+#else
jmp swapgs_restore_regs_and_return_to_usermode
+#endif
SYM_CODE_END(ret_from_fork_asm)
.popsection
@@ -372,14 +378,6 @@ SYM_CODE_END(\asmsym)
idtentry \vector asm_\cfunc \cfunc has_error_code=1
.endm
-/*
- * System vectors which invoke their handlers directly and are not
- * going through the regular common device interrupt handling code.
- */
-.macro idtentry_sysvec vector cfunc
- idtentry \vector asm_\cfunc \cfunc has_error_code=0
-.endm
-
/**
* idtentry_mce_db - Macro to generate entry stubs for #MC and #DB
* @vector: Vector number
@@ -564,7 +562,7 @@ SYM_INNER_LABEL(swapgs_restore_regs_and_return_to_usermode, SYM_L_GLOBAL)
#ifdef CONFIG_XEN_PV
ALTERNATIVE "", "jmp xenpv_restore_regs_and_return_to_usermode", X86_FEATURE_XENPV
#endif
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
ALTERNATIVE "", "jmp .Lpti_restore_regs_and_return_to_usermode", X86_FEATURE_PTI
#endif
@@ -581,7 +579,7 @@ SYM_INNER_LABEL(swapgs_restore_regs_and_return_to_usermode, SYM_L_GLOBAL)
jnz .Lnative_iret
ud2
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
.Lpti_restore_regs_and_return_to_usermode:
POP_REGS pop_rdi=0
@@ -973,14 +971,14 @@ SYM_CODE_START_LOCAL(paranoid_exit)
IBRS_EXIT save_reg=%r15
/*
- * The order of operations is important. RESTORE_CR3 requires
+ * The order of operations is important. PARANOID_RESTORE_CR3 requires
* kernel GSBASE.
*
* NB to anyone to try to optimize this code: this code does
* not execute at all for exceptions from user mode. Those
* exceptions go through error_return instead.
*/
- RESTORE_CR3 scratch_reg=%rax save_reg=%r14
+ PARANOID_RESTORE_CR3 scratch_reg=%rax save_reg=%r14
/* Handle the three GSBASE cases */
ALTERNATIVE "jmp .Lparanoid_exit_checkgs", "", X86_FEATURE_FSGSBASE
@@ -1101,7 +1099,7 @@ SYM_CODE_END(error_return)
*
* Registers:
* %r14: Used to save/restore the CR3 of the interrupted context
- * when PAGE_TABLE_ISOLATION is in use. Do not clobber.
+ * when MITIGATION_PAGE_TABLE_ISOLATION is in use. Do not clobber.
*/
SYM_CODE_START(asm_exc_nmi)
UNWIND_HINT_IRET_ENTRY
@@ -1409,8 +1407,7 @@ end_repeat_nmi:
/* Always restore stashed SPEC_CTRL value (see paranoid_entry) */
IBRS_EXIT save_reg=%r15
- /* Always restore stashed CR3 value (see paranoid_entry) */
- RESTORE_CR3 scratch_reg=%r15 save_reg=%r14
+ PARANOID_RESTORE_CR3 scratch_reg=%r15 save_reg=%r14
/*
* The above invocation of paranoid_entry stored the GSBASE
diff --git a/arch/x86/entry/entry_64_fred.S b/arch/x86/entry/entry_64_fred.S
new file mode 100644
index 0000000000..a02bc6f3d2
--- /dev/null
+++ b/arch/x86/entry/entry_64_fred.S
@@ -0,0 +1,131 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The actual FRED entry points.
+ */
+
+#include <linux/export.h>
+
+#include <asm/asm.h>
+#include <asm/fred.h>
+#include <asm/segment.h>
+
+#include "calling.h"
+
+ .code64
+ .section .noinstr.text, "ax"
+
+.macro FRED_ENTER
+ UNWIND_HINT_END_OF_STACK
+ ENDBR
+ PUSH_AND_CLEAR_REGS
+ movq %rsp, %rdi /* %rdi -> pt_regs */
+.endm
+
+.macro FRED_EXIT
+ UNWIND_HINT_REGS
+ POP_REGS
+.endm
+
+/*
+ * The new RIP value that FRED event delivery establishes is
+ * IA32_FRED_CONFIG & ~FFFH for events that occur in ring 3.
+ * Thus the FRED ring 3 entry point must be 4K page aligned.
+ */
+ .align 4096
+
+SYM_CODE_START_NOALIGN(asm_fred_entrypoint_user)
+ FRED_ENTER
+ call fred_entry_from_user
+SYM_INNER_LABEL(asm_fred_exit_user, SYM_L_GLOBAL)
+ FRED_EXIT
+1: ERETU
+
+ _ASM_EXTABLE_TYPE(1b, asm_fred_entrypoint_user, EX_TYPE_ERETU)
+SYM_CODE_END(asm_fred_entrypoint_user)
+
+/*
+ * The new RIP value that FRED event delivery establishes is
+ * (IA32_FRED_CONFIG & ~FFFH) + 256 for events that occur in
+ * ring 0, i.e., asm_fred_entrypoint_user + 256.
+ */
+ .org asm_fred_entrypoint_user + 256, 0xcc
+SYM_CODE_START_NOALIGN(asm_fred_entrypoint_kernel)
+ FRED_ENTER
+ call fred_entry_from_kernel
+ FRED_EXIT
+ ERETS
+SYM_CODE_END(asm_fred_entrypoint_kernel)
+
+#if IS_ENABLED(CONFIG_KVM_INTEL)
+SYM_FUNC_START(asm_fred_entry_from_kvm)
+ push %rbp
+ mov %rsp, %rbp
+
+ UNWIND_HINT_SAVE
+
+ /*
+ * Both IRQ and NMI from VMX can be handled on current task stack
+ * because there is no need to protect from reentrancy and the call
+ * stack leading to this helper is effectively constant and shallow
+ * (relatively speaking). Do the same when FRED is active, i.e., no
+ * need to check current stack level for a stack switch.
+ *
+ * Emulate the FRED-defined redzone and stack alignment.
+ */
+ sub $(FRED_CONFIG_REDZONE_AMOUNT << 6), %rsp
+ and $FRED_STACK_FRAME_RSP_MASK, %rsp
+
+ /*
+ * Start to push a FRED stack frame, which is always 64 bytes:
+ *
+ * +--------+-----------------+
+ * | Bytes | Usage |
+ * +--------+-----------------+
+ * | 63:56 | Reserved |
+ * | 55:48 | Event Data |
+ * | 47:40 | SS + Event Info |
+ * | 39:32 | RSP |
+ * | 31:24 | RFLAGS |
+ * | 23:16 | CS + Aux Info |
+ * | 15:8 | RIP |
+ * | 7:0 | Error Code |
+ * +--------+-----------------+
+ */
+ push $0 /* Reserved, must be 0 */
+ push $0 /* Event data, 0 for IRQ/NMI */
+ push %rdi /* fred_ss handed in by the caller */
+ push %rbp
+ pushf
+ mov $__KERNEL_CS, %rax
+ push %rax
+
+ /*
+ * Unlike the IDT event delivery, FRED _always_ pushes an error code
+ * after pushing the return RIP, thus the CALL instruction CANNOT be
+ * used here to push the return RIP, otherwise there is no chance to
+ * push an error code before invoking the IRQ/NMI handler.
+ *
+ * Use LEA to get the return RIP and push it, then push an error code.
+ */
+ lea 1f(%rip), %rax
+ push %rax /* Return RIP */
+ push $0 /* Error code, 0 for IRQ/NMI */
+
+ PUSH_AND_CLEAR_REGS clear_bp=0 unwind_hint=0
+ movq %rsp, %rdi /* %rdi -> pt_regs */
+ call __fred_entry_from_kvm /* Call the C entry point */
+ POP_REGS
+ ERETS
+1:
+ /*
+ * Objtool doesn't understand what ERETS does, this hint tells it that
+ * yes, we'll reach here and with what stack state. A save/restore pair
+ * isn't strictly needed, but it's the simplest form.
+ */
+ UNWIND_HINT_RESTORE
+ pop %rbp
+ RET
+
+SYM_FUNC_END(asm_fred_entry_from_kvm)
+EXPORT_SYMBOL_GPL(asm_fred_entry_from_kvm);
+#endif
diff --git a/arch/x86/entry/entry_fred.c b/arch/x86/entry/entry_fred.c
new file mode 100644
index 0000000000..89c1476fcd
--- /dev/null
+++ b/arch/x86/entry/entry_fred.c
@@ -0,0 +1,294 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * The FRED specific kernel/user entry functions which are invoked from
+ * assembly code and dispatch to the associated handlers.
+ */
+#include <linux/kernel.h>
+#include <linux/kdebug.h>
+#include <linux/nospec.h>
+
+#include <asm/desc.h>
+#include <asm/fred.h>
+#include <asm/idtentry.h>
+#include <asm/syscall.h>
+#include <asm/trapnr.h>
+#include <asm/traps.h>
+
+/* FRED EVENT_TYPE_OTHER vector numbers */
+#define FRED_SYSCALL 1
+#define FRED_SYSENTER 2
+
+static noinstr void fred_bad_type(struct pt_regs *regs, unsigned long error_code)
+{
+ irqentry_state_t irq_state = irqentry_nmi_enter(regs);
+
+ instrumentation_begin();
+
+ /* Panic on events from a high stack level */
+ if (regs->fred_cs.sl > 0) {
+ pr_emerg("PANIC: invalid or fatal FRED event; event type %u "
+ "vector %u error 0x%lx aux 0x%lx at %04x:%016lx\n",
+ regs->fred_ss.type, regs->fred_ss.vector, error_code,
+ fred_event_data(regs), regs->cs, regs->ip);
+ die("invalid or fatal FRED event", regs, error_code);
+ panic("invalid or fatal FRED event");
+ } else {
+ unsigned long flags = oops_begin();
+ int sig = SIGKILL;
+
+ pr_alert("BUG: invalid or fatal FRED event; event type %u "
+ "vector %u error 0x%lx aux 0x%lx at %04x:%016lx\n",
+ regs->fred_ss.type, regs->fred_ss.vector, error_code,
+ fred_event_data(regs), regs->cs, regs->ip);
+
+ if (__die("Invalid or fatal FRED event", regs, error_code))
+ sig = 0;
+
+ oops_end(flags, regs, sig);
+ }
+
+ instrumentation_end();
+ irqentry_nmi_exit(regs, irq_state);
+}
+
+static noinstr void fred_intx(struct pt_regs *regs)
+{
+ switch (regs->fred_ss.vector) {
+ /* Opcode 0xcd, 0x3, NOT INT3 (opcode 0xcc) */
+ case X86_TRAP_BP:
+ return exc_int3(regs);
+
+ /* Opcode 0xcd, 0x4, NOT INTO (opcode 0xce) */
+ case X86_TRAP_OF:
+ return exc_overflow(regs);
+
+#ifdef CONFIG_IA32_EMULATION
+ /* INT80 */
+ case IA32_SYSCALL_VECTOR:
+ if (ia32_enabled())
+ return fred_int80_emulation(regs);
+ fallthrough;
+#endif
+
+ default:
+ return exc_general_protection(regs, 0);
+ }
+}
+
+static __always_inline void fred_other(struct pt_regs *regs)
+{
+ /* The compiler can fold these conditions into a single test */
+ if (likely(regs->fred_ss.vector == FRED_SYSCALL && regs->fred_ss.lm)) {
+ regs->orig_ax = regs->ax;
+ regs->ax = -ENOSYS;
+ do_syscall_64(regs, regs->orig_ax);
+ return;
+ } else if (ia32_enabled() &&
+ likely(regs->fred_ss.vector == FRED_SYSENTER && !regs->fred_ss.lm)) {
+ regs->orig_ax = regs->ax;
+ regs->ax = -ENOSYS;
+ do_fast_syscall_32(regs);
+ return;
+ } else {
+ exc_invalid_op(regs);
+ return;
+ }
+}
+
+#define SYSVEC(_vector, _function) [_vector - FIRST_SYSTEM_VECTOR] = fred_sysvec_##_function
+
+static idtentry_t sysvec_table[NR_SYSTEM_VECTORS] __ro_after_init = {
+ SYSVEC(ERROR_APIC_VECTOR, error_interrupt),
+ SYSVEC(SPURIOUS_APIC_VECTOR, spurious_apic_interrupt),
+ SYSVEC(LOCAL_TIMER_VECTOR, apic_timer_interrupt),
+ SYSVEC(X86_PLATFORM_IPI_VECTOR, x86_platform_ipi),
+
+ SYSVEC(RESCHEDULE_VECTOR, reschedule_ipi),
+ SYSVEC(CALL_FUNCTION_SINGLE_VECTOR, call_function_single),
+ SYSVEC(CALL_FUNCTION_VECTOR, call_function),
+ SYSVEC(REBOOT_VECTOR, reboot),
+
+ SYSVEC(THRESHOLD_APIC_VECTOR, threshold),
+ SYSVEC(DEFERRED_ERROR_VECTOR, deferred_error),
+ SYSVEC(THERMAL_APIC_VECTOR, thermal),
+
+ SYSVEC(IRQ_WORK_VECTOR, irq_work),
+
+ SYSVEC(POSTED_INTR_VECTOR, kvm_posted_intr_ipi),
+ SYSVEC(POSTED_INTR_WAKEUP_VECTOR, kvm_posted_intr_wakeup_ipi),
+ SYSVEC(POSTED_INTR_NESTED_VECTOR, kvm_posted_intr_nested_ipi),
+};
+
+static bool fred_setup_done __initdata;
+
+void __init fred_install_sysvec(unsigned int sysvec, idtentry_t handler)
+{
+ if (WARN_ON_ONCE(sysvec < FIRST_SYSTEM_VECTOR))
+ return;
+
+ if (WARN_ON_ONCE(fred_setup_done))
+ return;
+
+ if (!WARN_ON_ONCE(sysvec_table[sysvec - FIRST_SYSTEM_VECTOR]))
+ sysvec_table[sysvec - FIRST_SYSTEM_VECTOR] = handler;
+}
+
+static noinstr void fred_handle_spurious_interrupt(struct pt_regs *regs)
+{
+ spurious_interrupt(regs, regs->fred_ss.vector);
+}
+
+void __init fred_complete_exception_setup(void)
+{
+ unsigned int vector;
+
+ for (vector = 0; vector < FIRST_EXTERNAL_VECTOR; vector++)
+ set_bit(vector, system_vectors);
+
+ for (vector = 0; vector < NR_SYSTEM_VECTORS; vector++) {
+ if (sysvec_table[vector])
+ set_bit(vector + FIRST_SYSTEM_VECTOR, system_vectors);
+ else
+ sysvec_table[vector] = fred_handle_spurious_interrupt;
+ }
+ fred_setup_done = true;
+}
+
+static noinstr void fred_extint(struct pt_regs *regs)
+{
+ unsigned int vector = regs->fred_ss.vector;
+ unsigned int index = array_index_nospec(vector - FIRST_SYSTEM_VECTOR,
+ NR_SYSTEM_VECTORS);
+
+ if (WARN_ON_ONCE(vector < FIRST_EXTERNAL_VECTOR))
+ return;
+
+ if (likely(vector >= FIRST_SYSTEM_VECTOR)) {
+ irqentry_state_t state = irqentry_enter(regs);
+
+ instrumentation_begin();
+ sysvec_table[index](regs);
+ instrumentation_end();
+ irqentry_exit(regs, state);
+ } else {
+ common_interrupt(regs, vector);
+ }
+}
+
+static noinstr void fred_hwexc(struct pt_regs *regs, unsigned long error_code)
+{
+ /* Optimize for #PF. That's the only exception which matters performance wise */
+ if (likely(regs->fred_ss.vector == X86_TRAP_PF))
+ return exc_page_fault(regs, error_code);
+
+ switch (regs->fred_ss.vector) {
+ case X86_TRAP_DE: return exc_divide_error(regs);
+ case X86_TRAP_DB: return fred_exc_debug(regs);
+ case X86_TRAP_BR: return exc_bounds(regs);
+ case X86_TRAP_UD: return exc_invalid_op(regs);
+ case X86_TRAP_NM: return exc_device_not_available(regs);
+ case X86_TRAP_DF: return exc_double_fault(regs, error_code);
+ case X86_TRAP_TS: return exc_invalid_tss(regs, error_code);
+ case X86_TRAP_NP: return exc_segment_not_present(regs, error_code);
+ case X86_TRAP_SS: return exc_stack_segment(regs, error_code);
+ case X86_TRAP_GP: return exc_general_protection(regs, error_code);
+ case X86_TRAP_MF: return exc_coprocessor_error(regs);
+ case X86_TRAP_AC: return exc_alignment_check(regs, error_code);
+ case X86_TRAP_XF: return exc_simd_coprocessor_error(regs);
+
+#ifdef CONFIG_X86_MCE
+ case X86_TRAP_MC: return fred_exc_machine_check(regs);
+#endif
+#ifdef CONFIG_INTEL_TDX_GUEST
+ case X86_TRAP_VE: return exc_virtualization_exception(regs);
+#endif
+#ifdef CONFIG_X86_CET
+ case X86_TRAP_CP: return exc_control_protection(regs, error_code);
+#endif
+ default: return fred_bad_type(regs, error_code);
+ }
+
+}
+
+static noinstr void fred_swexc(struct pt_regs *regs, unsigned long error_code)
+{
+ switch (regs->fred_ss.vector) {
+ case X86_TRAP_BP: return exc_int3(regs);
+ case X86_TRAP_OF: return exc_overflow(regs);
+ default: return fred_bad_type(regs, error_code);
+ }
+}
+
+__visible noinstr void fred_entry_from_user(struct pt_regs *regs)
+{
+ unsigned long error_code = regs->orig_ax;
+
+ /* Invalidate orig_ax so that syscall_get_nr() works correctly */
+ regs->orig_ax = -1;
+
+ switch (regs->fred_ss.type) {
+ case EVENT_TYPE_EXTINT:
+ return fred_extint(regs);
+ case EVENT_TYPE_NMI:
+ if (likely(regs->fred_ss.vector == X86_TRAP_NMI))
+ return fred_exc_nmi(regs);
+ break;
+ case EVENT_TYPE_HWEXC:
+ return fred_hwexc(regs, error_code);
+ case EVENT_TYPE_SWINT:
+ return fred_intx(regs);
+ case EVENT_TYPE_PRIV_SWEXC:
+ if (likely(regs->fred_ss.vector == X86_TRAP_DB))
+ return fred_exc_debug(regs);
+ break;
+ case EVENT_TYPE_SWEXC:
+ return fred_swexc(regs, error_code);
+ case EVENT_TYPE_OTHER:
+ return fred_other(regs);
+ default: break;
+ }
+
+ return fred_bad_type(regs, error_code);
+}
+
+__visible noinstr void fred_entry_from_kernel(struct pt_regs *regs)
+{
+ unsigned long error_code = regs->orig_ax;
+
+ /* Invalidate orig_ax so that syscall_get_nr() works correctly */
+ regs->orig_ax = -1;
+
+ switch (regs->fred_ss.type) {
+ case EVENT_TYPE_EXTINT:
+ return fred_extint(regs);
+ case EVENT_TYPE_NMI:
+ if (likely(regs->fred_ss.vector == X86_TRAP_NMI))
+ return fred_exc_nmi(regs);
+ break;
+ case EVENT_TYPE_HWEXC:
+ return fred_hwexc(regs, error_code);
+ case EVENT_TYPE_PRIV_SWEXC:
+ if (likely(regs->fred_ss.vector == X86_TRAP_DB))
+ return fred_exc_debug(regs);
+ break;
+ case EVENT_TYPE_SWEXC:
+ return fred_swexc(regs, error_code);
+ default: break;
+ }
+
+ return fred_bad_type(regs, error_code);
+}
+
+#if IS_ENABLED(CONFIG_KVM_INTEL)
+__visible noinstr void __fred_entry_from_kvm(struct pt_regs *regs)
+{
+ switch (regs->fred_ss.type) {
+ case EVENT_TYPE_EXTINT:
+ return fred_extint(regs);
+ case EVENT_TYPE_NMI:
+ return fred_exc_nmi(regs);
+ default:
+ WARN_ON_ONCE(1);
+ }
+}
+#endif
diff --git a/arch/x86/entry/thunk_32.S b/arch/x86/entry/thunk_32.S
index 0103e103a6..da37f42f45 100644
--- a/arch/x86/entry/thunk_32.S
+++ b/arch/x86/entry/thunk_32.S
@@ -4,33 +4,15 @@
* Copyright 2008 by Steven Rostedt, Red Hat, Inc
* (inspired by Andi Kleen's thunk_64.S)
*/
- #include <linux/export.h>
- #include <linux/linkage.h>
- #include <asm/asm.h>
- /* put return address in eax (arg1) */
- .macro THUNK name, func, put_ret_addr_in_eax=0
-SYM_CODE_START_NOALIGN(\name)
- pushl %eax
- pushl %ecx
- pushl %edx
+#include <linux/export.h>
+#include <linux/linkage.h>
+#include <asm/asm.h>
- .if \put_ret_addr_in_eax
- /* Place EIP in the arg1 */
- movl 3*4(%esp), %eax
- .endif
+#include "calling.h"
- call \func
- popl %edx
- popl %ecx
- popl %eax
- RET
- _ASM_NOKPROBE(\name)
-SYM_CODE_END(\name)
- .endm
-
- THUNK preempt_schedule_thunk, preempt_schedule
- THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
- EXPORT_SYMBOL(preempt_schedule_thunk)
- EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
+THUNK preempt_schedule_thunk, preempt_schedule
+THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
+EXPORT_SYMBOL(preempt_schedule_thunk)
+EXPORT_SYMBOL(preempt_schedule_notrace_thunk)
diff --git a/arch/x86/entry/thunk_64.S b/arch/x86/entry/thunk_64.S
index 416b400f39..119ebdc3d3 100644
--- a/arch/x86/entry/thunk_64.S
+++ b/arch/x86/entry/thunk_64.S
@@ -9,39 +9,6 @@
#include "calling.h"
#include <asm/asm.h>
- /* rdi: arg1 ... normal C conventions. rax is saved/restored. */
- .macro THUNK name, func
-SYM_FUNC_START(\name)
- pushq %rbp
- movq %rsp, %rbp
-
- pushq %rdi
- pushq %rsi
- pushq %rdx
- pushq %rcx
- pushq %rax
- pushq %r8
- pushq %r9
- pushq %r10
- pushq %r11
-
- call \func
-
- popq %r11
- popq %r10
- popq %r9
- popq %r8
- popq %rax
- popq %rcx
- popq %rdx
- popq %rsi
- popq %rdi
- popq %rbp
- RET
-SYM_FUNC_END(\name)
- _ASM_NOKPROBE(\name)
- .endm
-
THUNK preempt_schedule_thunk, preempt_schedule
THUNK preempt_schedule_notrace_thunk, preempt_schedule_notrace
EXPORT_SYMBOL(preempt_schedule_thunk)
diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 73ac5adb0b..3d64bcc403 100644
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -3,13 +3,15 @@
# Building vDSO images for x86.
#
-# Include the generic Makefile to check the built vdso.
+# Include the generic Makefile to check the built vDSO:
include $(srctree)/lib/vdso/Makefile
# Sanitizer runtimes are unavailable and cannot be linked here.
KASAN_SANITIZE := n
KMSAN_SANITIZE_vclock_gettime.o := n
+KMSAN_SANITIZE_vdso32/vclock_gettime.o := n
KMSAN_SANITIZE_vgetcpu.o := n
+KMSAN_SANITIZE_vdso32/vgetcpu.o := n
UBSAN_SANITIZE := n
KCSAN_SANITIZE := n
@@ -18,52 +20,40 @@ OBJECT_FILES_NON_STANDARD := y
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
-VDSO64-$(CONFIG_X86_64) := y
-VDSOX32-$(CONFIG_X86_X32_ABI) := y
-VDSO32-$(CONFIG_X86_32) := y
-VDSO32-$(CONFIG_IA32_EMULATION) := y
-
-# files to link into the vdso
+# Files to link into the vDSO:
vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o
vobjs32-y := vdso32/note.o vdso32/system_call.o vdso32/sigreturn.o
vobjs32-y += vdso32/vclock_gettime.o vdso32/vgetcpu.o
vobjs-$(CONFIG_X86_SGX) += vsgx.o
-# files to link into kernel
-obj-y += vma.o extable.o
-KASAN_SANITIZE_vma.o := y
-UBSAN_SANITIZE_vma.o := y
-KCSAN_SANITIZE_vma.o := y
+# Files to link into the kernel:
+obj-y += vma.o extable.o
+KASAN_SANITIZE_vma.o := y
+UBSAN_SANITIZE_vma.o := y
+KCSAN_SANITIZE_vma.o := y
-OBJECT_FILES_NON_STANDARD_extable.o := n
-OBJECT_FILES_NON_STANDARD_vdso-image-32.o := n
-OBJECT_FILES_NON_STANDARD_vdso-image-x32.o := n
-OBJECT_FILES_NON_STANDARD_vdso-image-64.o := n
-OBJECT_FILES_NON_STANDARD_vdso32-setup.o := n
OBJECT_FILES_NON_STANDARD_vma.o := n
+OBJECT_FILES_NON_STANDARD_extable.o := n
-# vDSO images to build
-vdso_img-$(VDSO64-y) += 64
-vdso_img-$(VDSOX32-y) += x32
-vdso_img-$(VDSO32-y) += 32
+# vDSO images to build:
+obj-$(CONFIG_X86_64) += vdso-image-64.o
+obj-$(CONFIG_X86_X32_ABI) += vdso-image-x32.o
+obj-$(CONFIG_COMPAT_32) += vdso-image-32.o vdso32-setup.o
-obj-$(VDSO32-y) += vdso32-setup.o
+OBJECT_FILES_NON_STANDARD_vdso-image-32.o := n
+OBJECT_FILES_NON_STANDARD_vdso-image-x32.o := n
+OBJECT_FILES_NON_STANDARD_vdso-image-64.o := n
+OBJECT_FILES_NON_STANDARD_vdso32-setup.o := n
-vobjs := $(foreach F,$(vobjs-y),$(obj)/$F)
-vobjs32 := $(foreach F,$(vobjs32-y),$(obj)/$F)
+vobjs := $(addprefix $(obj)/, $(vobjs-y))
+vobjs32 := $(addprefix $(obj)/, $(vobjs32-y))
$(obj)/vdso.o: $(obj)/vdso.so
targets += vdso.lds $(vobjs-y)
targets += vdso32/vdso32.lds $(vobjs32-y)
-# Build the vDSO image C files and link them in.
-vdso_img_objs := $(vdso_img-y:%=vdso-image-%.o)
-vdso_img_cfiles := $(vdso_img-y:%=vdso-image-%.c)
-vdso_img_sodbg := $(vdso_img-y:%=vdso%.so.dbg)
-obj-y += $(vdso_img_objs)
-targets += $(vdso_img_cfiles)
-targets += $(vdso_img_sodbg) $(vdso_img-y:%=vdso%.so)
+targets += $(foreach x, 64 x32 32, vdso-image-$(x).c vdso$(x).so vdso$(x).so.dbg)
CPPFLAGS_vdso.lds += -P -C
@@ -91,7 +81,7 @@ CFL := $(PROFILING) -mcmodel=small -fPIC -O2 -fasynchronous-unwind-tables -m64 \
-fno-omit-frame-pointer -foptimize-sibling-calls \
-DDISABLE_BRANCH_PROFILING -DBUILD_VDSO
-ifdef CONFIG_RETPOLINE
+ifdef CONFIG_MITIGATION_RETPOLINE
ifneq ($(RETPOLINE_VDSO_CFLAGS),)
CFL += $(RETPOLINE_VDSO_CFLAGS)
endif
@@ -127,7 +117,7 @@ VDSO_LDFLAGS_vdsox32.lds = -m elf32_x86_64 -soname linux-vdso.so.1 \
vobjx32s-y := $(vobjs-y:.o=-x32.o)
# same thing, but in the output directory
-vobjx32s := $(foreach F,$(vobjx32s-y),$(obj)/$F)
+vobjx32s := $(addprefix $(obj)/, $(vobjx32s-y))
# Convert 64bit object file to x32 for x32 vDSO.
quiet_cmd_x32 = X32 $@
@@ -168,7 +158,7 @@ KBUILD_CFLAGS_32 += $(call cc-option, -foptimize-sibling-calls)
KBUILD_CFLAGS_32 += -fno-omit-frame-pointer
KBUILD_CFLAGS_32 += -DDISABLE_BRANCH_PROFILING
-ifdef CONFIG_RETPOLINE
+ifdef CONFIG_MITIGATION_RETPOLINE
ifneq ($(RETPOLINE_VDSO_CFLAGS),)
KBUILD_CFLAGS_32 += $(RETPOLINE_VDSO_CFLAGS)
endif
@@ -194,5 +184,3 @@ GCOV_PROFILE := n
quiet_cmd_vdso_and_check = VDSO $@
cmd_vdso_and_check = $(cmd_vdso); $(cmd_vdso_check)
-
-clean-files := vdso32.so vdso32.so.dbg vdso64* vdso-image-*.c vdsox32.so*
diff --git a/arch/x86/entry/vdso/vma.c b/arch/x86/entry/vdso/vma.c
index 7645730dc2..6d83ceb7f1 100644
--- a/arch/x86/entry/vdso/vma.c
+++ b/arch/x86/entry/vdso/vma.c
@@ -274,59 +274,6 @@ up_fail:
return ret;
}
-#ifdef CONFIG_X86_64
-/*
- * Put the vdso above the (randomized) stack with another randomized
- * offset. This way there is no hole in the middle of address space.
- * To save memory make sure it is still in the same PTE as the stack
- * top. This doesn't give that many random bits.
- *
- * Note that this algorithm is imperfect: the distribution of the vdso
- * start address within a PMD is biased toward the end.
- *
- * Only used for the 64-bit and x32 vdsos.
- */
-static unsigned long vdso_addr(unsigned long start, unsigned len)
-{
- unsigned long addr, end;
- unsigned offset;
-
- /*
- * Round up the start address. It can start out unaligned as a result
- * of stack start randomization.
- */
- start = PAGE_ALIGN(start);
-
- /* Round the lowest possible end address up to a PMD boundary. */
- end = (start + len + PMD_SIZE - 1) & PMD_MASK;
- if (end >= DEFAULT_MAP_WINDOW)
- end = DEFAULT_MAP_WINDOW;
- end -= len;
-
- if (end > start) {
- offset = get_random_u32_below(((end - start) >> PAGE_SHIFT) + 1);
- addr = start + (offset << PAGE_SHIFT);
- } else {
- addr = start;
- }
-
- /*
- * Forcibly align the final address in case we have a hardware
- * issue that requires alignment for performance reasons.
- */
- addr = align_vdso_addr(addr);
-
- return addr;
-}
-
-static int map_vdso_randomized(const struct vdso_image *image)
-{
- unsigned long addr = vdso_addr(current->mm->start_stack, image->size-image->sym_vvar_start);
-
- return map_vdso(image, addr);
-}
-#endif
-
int map_vdso_once(const struct vdso_image *image, unsigned long addr)
{
struct mm_struct *mm = current->mm;
@@ -369,7 +316,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (!vdso64_enabled)
return 0;
- return map_vdso_randomized(&vdso_image_64);
+ return map_vdso(&vdso_image_64, 0);
}
#ifdef CONFIG_COMPAT
@@ -380,7 +327,7 @@ int compat_arch_setup_additional_pages(struct linux_binprm *bprm,
if (x32) {
if (!vdso64_enabled)
return 0;
- return map_vdso_randomized(&vdso_image_x32);
+ return map_vdso(&vdso_image_x32, 0);
}
#endif
#ifdef CONFIG_IA32_EMULATION
diff --git a/arch/x86/entry/vsyscall/vsyscall_64.c b/arch/x86/entry/vsyscall/vsyscall_64.c
index 1245000a87..2fb7d53cf3 100644
--- a/arch/x86/entry/vsyscall/vsyscall_64.c
+++ b/arch/x86/entry/vsyscall/vsyscall_64.c
@@ -76,7 +76,7 @@ static void warn_bad_vsyscall(const char *level, struct pt_regs *regs,
if (!show_unhandled_signals)
return;
- printk_ratelimited("%s%s[%d] %s ip:%lx cs:%lx sp:%lx ax:%lx si:%lx di:%lx\n",
+ printk_ratelimited("%s%s[%d] %s ip:%lx cs:%x sp:%lx ax:%lx si:%lx di:%lx\n",
level, current->comm, task_pid_nr(current),
message, regs->ip, regs->cs,
regs->sp, regs->ax, regs->si, regs->di);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-03 05:22:38 +0000