448 lines
12 KiB
Plaintext
448 lines
12 KiB
Plaintext
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From: jbeulich@novell.com
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Subject: fix unwind annotations
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Patch-mainline: tbd
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References: bnc#472783, bnc#588458
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---
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arch/x86/kernel/entry_64.S | 193 +++++++++++++++++++++++----------------------
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arch/x86/kernel/head_64.S | 13 +++
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2 files changed, 115 insertions(+), 91 deletions(-)
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--- a/arch/x86/kernel/entry_64.S
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+++ b/arch/x86/kernel/entry_64.S
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@@ -38,6 +38,7 @@
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*/
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#include <linux/linkage.h>
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+#include <linux/stringify.h>
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#include <asm/segment.h>
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#include <asm/cache.h>
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#include <asm/errno.h>
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@@ -240,21 +241,21 @@ ENDPROC(native_usergs_sysret64)
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/*
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* initial frame state for interrupts (and exceptions without error code)
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*/
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- .macro EMPTY_FRAME start=1 offset=0
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- .if \start
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+ .macro EMPTY_FRAME offset=0
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CFI_STARTPROC simple
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CFI_SIGNAL_FRAME
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- CFI_DEF_CFA rsp,8+\offset
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- .else
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- CFI_DEF_CFA_OFFSET 8+\offset
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- .endif
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+ CFI_DEF_CFA rsp,\offset
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.endm
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/*
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* initial frame state for interrupts (and exceptions without error code)
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*/
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.macro INTR_FRAME start=1 offset=0
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- EMPTY_FRAME \start, SS+8+\offset-RIP
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+ .if \start
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+ EMPTY_FRAME __stringify(SS+8+\offset-RIP)
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+ .else
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+ CFI_DEF_CFA_OFFSET SS+8+\offset-RIP
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+ .endif
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/*CFI_REL_OFFSET ss, SS+\offset-RIP*/
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CFI_REL_OFFSET rsp, RSP+\offset-RIP
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/*CFI_REL_OFFSET rflags, EFLAGS+\offset-RIP*/
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@@ -267,15 +268,16 @@ ENDPROC(native_usergs_sysret64)
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* with vector already pushed)
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*/
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.macro XCPT_FRAME start=1 offset=0
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- INTR_FRAME \start, RIP+\offset-ORIG_RAX
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- /*CFI_REL_OFFSET orig_rax, ORIG_RAX-ORIG_RAX*/
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+ INTR_FRAME \start, __stringify(RIP+\offset-ORIG_RAX)
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.endm
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/*
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* frame that enables calling into C.
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*/
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.macro PARTIAL_FRAME start=1 offset=0
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- XCPT_FRAME \start, ORIG_RAX+\offset-ARGOFFSET
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+ .if \start >= 0
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+ XCPT_FRAME \start, __stringify(ORIG_RAX+\offset-ARGOFFSET)
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+ .endif
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CFI_REL_OFFSET rdi, RDI+\offset-ARGOFFSET
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CFI_REL_OFFSET rsi, RSI+\offset-ARGOFFSET
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CFI_REL_OFFSET rdx, RDX+\offset-ARGOFFSET
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@@ -291,7 +293,9 @@ ENDPROC(native_usergs_sysret64)
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* frame that enables passing a complete pt_regs to a C function.
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*/
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.macro DEFAULT_FRAME start=1 offset=0
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- PARTIAL_FRAME \start, R11+\offset-R15
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+ .if \start >= -1
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+ PARTIAL_FRAME \start, __stringify(R11+\offset-R15)
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+ .endif
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CFI_REL_OFFSET rbx, RBX+\offset
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CFI_REL_OFFSET rbp, RBP+\offset
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CFI_REL_OFFSET r12, R12+\offset
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@@ -302,21 +306,23 @@ ENDPROC(native_usergs_sysret64)
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/* save partial stack frame */
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ENTRY(save_args)
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- XCPT_FRAME
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+ XCPT_FRAME offset=__stringify(ORIG_RAX-ARGOFFSET+16)
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cld
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- movq_cfi rdi, RDI+16-ARGOFFSET
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- movq_cfi rsi, RSI+16-ARGOFFSET
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- movq_cfi rdx, RDX+16-ARGOFFSET
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- movq_cfi rcx, RCX+16-ARGOFFSET
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- movq_cfi rax, RAX+16-ARGOFFSET
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- movq_cfi r8, R8+16-ARGOFFSET
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- movq_cfi r9, R9+16-ARGOFFSET
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- movq_cfi r10, R10+16-ARGOFFSET
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- movq_cfi r11, R11+16-ARGOFFSET
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+ movq %rdi, RDI+16-ARGOFFSET(%rsp)
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+ movq %rsi, RSI+16-ARGOFFSET(%rsp)
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+ movq %rdx, RDX+16-ARGOFFSET(%rsp)
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+ movq %rcx, RCX+16-ARGOFFSET(%rsp)
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+ movq_cfi rax, __stringify(RAX+16-ARGOFFSET)
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+ movq %r8, R8+16-ARGOFFSET(%rsp)
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+ movq %r9, R9+16-ARGOFFSET(%rsp)
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+ movq %r10, R10+16-ARGOFFSET(%rsp)
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+ movq_cfi r11, __stringify(R11+16-ARGOFFSET)
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leaq -ARGOFFSET+16(%rsp),%rdi /* arg1 for handler */
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movq_cfi rbp, 8 /* push %rbp */
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leaq 8(%rsp), %rbp /* mov %rsp, %ebp */
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+ CFI_DEF_CFA_REGISTER rbp
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+ CFI_ADJUST_CFA_OFFSET -8
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testl $3, CS(%rdi)
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je 1f
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SWAPGS
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@@ -328,11 +334,10 @@ ENTRY(save_args)
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*/
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1: incl PER_CPU_VAR(irq_count)
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jne 2f
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- popq_cfi %rax /* move return address... */
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+ popq %rax /* move return address... */
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mov PER_CPU_VAR(irq_stack_ptr),%rsp
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- EMPTY_FRAME 0
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- pushq_cfi %rbp /* backlink for unwinder */
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- pushq_cfi %rax /* ... to the new stack */
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+ pushq %rbp /* backlink for unwinder */
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+ pushq %rax /* ... to the new stack */
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/*
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* We entered an interrupt context - irqs are off:
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*/
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@@ -342,14 +347,14 @@ ENTRY(save_args)
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END(save_args)
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ENTRY(save_rest)
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- PARTIAL_FRAME 1 REST_SKIP+8
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+ CFI_STARTPROC
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movq 5*8+16(%rsp), %r11 /* save return address */
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- movq_cfi rbx, RBX+16
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- movq_cfi rbp, RBP+16
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- movq_cfi r12, R12+16
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- movq_cfi r13, R13+16
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- movq_cfi r14, R14+16
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- movq_cfi r15, R15+16
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+ movq %rbx, RBX+16(%rsp)
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+ movq %rbp, RBP+16(%rsp)
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+ movq %r12, R12+16(%rsp)
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+ movq %r13, R13+16(%rsp)
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+ movq %r14, R14+16(%rsp)
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+ movq %r15, R15+16(%rsp)
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movq %r11, 8(%rsp) /* return address */
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FIXUP_TOP_OF_STACK %r11, 16
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ret
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@@ -359,23 +364,23 @@ END(save_rest)
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/* save complete stack frame */
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.pushsection .kprobes.text, "ax"
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ENTRY(save_paranoid)
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- XCPT_FRAME 1 RDI+8
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+ XCPT_FRAME offset=__stringify(ORIG_RAX-R15+8)
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cld
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- movq_cfi rdi, RDI+8
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- movq_cfi rsi, RSI+8
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- movq_cfi rdx, RDX+8
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- movq_cfi rcx, RCX+8
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- movq_cfi rax, RAX+8
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- movq_cfi r8, R8+8
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- movq_cfi r9, R9+8
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- movq_cfi r10, R10+8
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- movq_cfi r11, R11+8
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- movq_cfi rbx, RBX+8
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- movq_cfi rbp, RBP+8
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- movq_cfi r12, R12+8
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- movq_cfi r13, R13+8
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- movq_cfi r14, R14+8
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- movq_cfi r15, R15+8
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+ movq %rdi, RDI+8(%rsp)
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+ movq %rsi, RSI+8(%rsp)
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+ movq_cfi rdx, __stringify(RDX+8)
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+ movq_cfi rcx, __stringify(RCX+8)
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+ movq_cfi rax, __stringify(RAX+8)
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+ movq %r8, R8+8(%rsp)
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+ movq %r9, R9+8(%rsp)
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+ movq %r10, R10+8(%rsp)
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+ movq %r11, R11+8(%rsp)
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+ movq_cfi rbx, __stringify(RBX+8)
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+ movq %rbp, RBP+8(%rsp)
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+ movq %r12, R12+8(%rsp)
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+ movq %r13, R13+8(%rsp)
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+ movq %r14, R14+8(%rsp)
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+ movq %r15, R15+8(%rsp)
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movl $1,%ebx
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movl $MSR_GS_BASE,%ecx
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rdmsr
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@@ -685,7 +690,7 @@ ENTRY(\label)
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subq $REST_SKIP, %rsp
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CFI_ADJUST_CFA_OFFSET REST_SKIP
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call save_rest
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- DEFAULT_FRAME 0 8 /* offset 8: return address */
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+ DEFAULT_FRAME -2 8 /* offset 8: return address */
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leaq 8(%rsp), \arg /* pt_regs pointer */
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call \func
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jmp ptregscall_common
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@@ -702,12 +707,12 @@ END(\label)
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ENTRY(ptregscall_common)
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DEFAULT_FRAME 1 8 /* offset 8: return address */
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RESTORE_TOP_OF_STACK %r11, 8
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- movq_cfi_restore R15+8, r15
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- movq_cfi_restore R14+8, r14
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- movq_cfi_restore R13+8, r13
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- movq_cfi_restore R12+8, r12
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- movq_cfi_restore RBP+8, rbp
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- movq_cfi_restore RBX+8, rbx
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+ movq_cfi_restore __stringify(R15+8), r15
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+ movq_cfi_restore __stringify(R14+8), r14
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+ movq_cfi_restore __stringify(R13+8), r13
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+ movq_cfi_restore __stringify(R12+8), r12
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+ movq_cfi_restore __stringify(RBP+8), rbp
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+ movq_cfi_restore __stringify(RBX+8), rbx
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ret $REST_SKIP /* pop extended registers */
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CFI_ENDPROC
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END(ptregscall_common)
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@@ -719,9 +724,8 @@ END(ptregscall_common)
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ENTRY(stub_execve)
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CFI_STARTPROC
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- popq %r11
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- CFI_ADJUST_CFA_OFFSET -8
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- CFI_REGISTER rip, r11
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+ addq $8, %rsp
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+ PARTIAL_FRAME 0
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SAVE_REST
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FIXUP_TOP_OF_STACK %r11
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movq %rsp, %rcx
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@@ -740,7 +744,7 @@ END(stub_execve)
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ENTRY(stub_rt_sigreturn)
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CFI_STARTPROC
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addq $8, %rsp
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- CFI_ADJUST_CFA_OFFSET -8
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+ PARTIAL_FRAME 0
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SAVE_REST
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movq %rsp,%rdi
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FIXUP_TOP_OF_STACK %r11
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@@ -796,10 +805,12 @@ END(interrupt)
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/* 0(%rsp): ~(interrupt number) */
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.macro interrupt func
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- subq $10*8, %rsp
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- CFI_ADJUST_CFA_OFFSET 10*8
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+ subq $ORIG_RAX-ARGOFFSET+8, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-ARGOFFSET+8
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call save_args
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- PARTIAL_FRAME 0
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+ PARTIAL_FRAME -1 8
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+ CFI_REL_OFFSET rbp, 0
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+ CFI_DEF_CFA_REGISTER rbp
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call \func
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.endm
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@@ -1036,10 +1047,10 @@ ENTRY(\sym)
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INTR_FRAME
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PARAVIRT_ADJUST_EXCEPTION_FRAME
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pushq_cfi $-1 /* ORIG_RAX: no syscall to restart */
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- subq $15*8,%rsp
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- CFI_ADJUST_CFA_OFFSET 15*8
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+ subq $ORIG_RAX-R15, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
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call error_entry
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- DEFAULT_FRAME 0
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+ DEFAULT_FRAME -1
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movq %rsp,%rdi /* pt_regs pointer */
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xorl %esi,%esi /* no error code */
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call \do_sym
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@@ -1054,8 +1065,10 @@ ENTRY(\sym)
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PARAVIRT_ADJUST_EXCEPTION_FRAME
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pushq $-1 /* ORIG_RAX: no syscall to restart */
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CFI_ADJUST_CFA_OFFSET 8
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- subq $15*8, %rsp
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+ subq $ORIG_RAX-R15, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
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call save_paranoid
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+ DEFAULT_FRAME -1
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TRACE_IRQS_OFF
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movq %rsp,%rdi /* pt_regs pointer */
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xorl %esi,%esi /* no error code */
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@@ -1071,8 +1084,10 @@ ENTRY(\sym)
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PARAVIRT_ADJUST_EXCEPTION_FRAME
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pushq $-1 /* ORIG_RAX: no syscall to restart */
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CFI_ADJUST_CFA_OFFSET 8
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- subq $15*8, %rsp
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+ subq $ORIG_RAX-R15, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
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call save_paranoid
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+ DEFAULT_FRAME -1
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TRACE_IRQS_OFF
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movq %rsp,%rdi /* pt_regs pointer */
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xorl %esi,%esi /* no error code */
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@@ -1089,10 +1104,10 @@ END(\sym)
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ENTRY(\sym)
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XCPT_FRAME
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PARAVIRT_ADJUST_EXCEPTION_FRAME
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- subq $15*8,%rsp
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- CFI_ADJUST_CFA_OFFSET 15*8
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+ subq $ORIG_RAX-R15, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
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call error_entry
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- DEFAULT_FRAME 0
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+ DEFAULT_FRAME -1
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movq %rsp,%rdi /* pt_regs pointer */
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movq ORIG_RAX(%rsp),%rsi /* get error code */
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movq $-1,ORIG_RAX(%rsp) /* no syscall to restart */
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@@ -1107,10 +1122,10 @@ END(\sym)
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ENTRY(\sym)
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XCPT_FRAME
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PARAVIRT_ADJUST_EXCEPTION_FRAME
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- subq $15*8,%rsp
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- CFI_ADJUST_CFA_OFFSET 15*8
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+ subq $ORIG_RAX-R15, %rsp
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+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
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call save_paranoid
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- DEFAULT_FRAME 0
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+ DEFAULT_FRAME -1
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TRACE_IRQS_OFF
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|
|
movq %rsp,%rdi /* pt_regs pointer */
|
||
|
|
movq ORIG_RAX(%rsp),%rsi /* get error code */
|
||
|
|
@@ -1426,7 +1441,7 @@ paranoidzeroentry machine_check *machine
|
||
|
|
|
||
|
|
/* ebx: no swapgs flag */
|
||
|
|
ENTRY(paranoid_exit)
|
||
|
|
- INTR_FRAME
|
||
|
|
+ DEFAULT_FRAME
|
||
|
|
DISABLE_INTERRUPTS(CLBR_NONE)
|
||
|
|
TRACE_IRQS_OFF
|
||
|
|
testl %ebx,%ebx /* swapgs needed? */
|
||
|
|
@@ -1476,25 +1491,24 @@ END(paranoid_exit)
|
||
|
|
* returns in "no swapgs flag" in %ebx.
|
||
|
|
*/
|
||
|
|
ENTRY(error_entry)
|
||
|
|
- XCPT_FRAME
|
||
|
|
- CFI_ADJUST_CFA_OFFSET 15*8
|
||
|
|
+ XCPT_FRAME offset=__stringify(ORIG_RAX-R15+8)
|
||
|
|
/* oldrax contains error code */
|
||
|
|
cld
|
||
|
|
- movq_cfi rdi, RDI+8
|
||
|
|
- movq_cfi rsi, RSI+8
|
||
|
|
- movq_cfi rdx, RDX+8
|
||
|
|
- movq_cfi rcx, RCX+8
|
||
|
|
- movq_cfi rax, RAX+8
|
||
|
|
- movq_cfi r8, R8+8
|
||
|
|
- movq_cfi r9, R9+8
|
||
|
|
- movq_cfi r10, R10+8
|
||
|
|
- movq_cfi r11, R11+8
|
||
|
|
- movq_cfi rbx, RBX+8
|
||
|
|
- movq_cfi rbp, RBP+8
|
||
|
|
- movq_cfi r12, R12+8
|
||
|
|
- movq_cfi r13, R13+8
|
||
|
|
- movq_cfi r14, R14+8
|
||
|
|
- movq_cfi r15, R15+8
|
||
|
|
+ movq %rdi, RDI+8(%rsp)
|
||
|
|
+ movq %rsi, RSI+8(%rsp)
|
||
|
|
+ movq %rdx, RDX+8(%rsp)
|
||
|
|
+ movq %rcx, RCX+8(%rsp)
|
||
|
|
+ movq %rax, RAX+8(%rsp)
|
||
|
|
+ movq %r8, R8+8(%rsp)
|
||
|
|
+ movq %r9, R9+8(%rsp)
|
||
|
|
+ movq %r10, R10+8(%rsp)
|
||
|
|
+ movq %r11, R11+8(%rsp)
|
||
|
|
+ movq_cfi rbx, __stringify(RBX+8)
|
||
|
|
+ movq %rbp, RBP+8(%rsp)
|
||
|
|
+ movq %r12, R12+8(%rsp)
|
||
|
|
+ movq %r13, R13+8(%rsp)
|
||
|
|
+ movq %r14, R14+8(%rsp)
|
||
|
|
+ movq %r15, R15+8(%rsp)
|
||
|
|
xorl %ebx,%ebx
|
||
|
|
testl $3,CS+8(%rsp)
|
||
|
|
je error_kernelspace
|
||
|
|
@@ -1503,7 +1517,6 @@ error_swapgs:
|
||
|
|
error_sti:
|
||
|
|
TRACE_IRQS_OFF
|
||
|
|
ret
|
||
|
|
- CFI_ENDPROC
|
||
|
|
|
||
|
|
/*
|
||
|
|
* There are two places in the kernel that can potentially fault with
|
||
|
|
@@ -1513,6 +1522,7 @@ error_sti:
|
||
|
|
* compat mode. Check for these here too.
|
||
|
|
*/
|
||
|
|
error_kernelspace:
|
||
|
|
+ CFI_REL_OFFSET rcx, RCX+8
|
||
|
|
incl %ebx
|
||
|
|
leaq irq_return(%rip),%rcx
|
||
|
|
cmpq %rcx,RIP+8(%rsp)
|
||
|
|
@@ -1528,6 +1542,7 @@ bstep_iret:
|
||
|
|
/* Fix truncated RIP */
|
||
|
|
movq %rcx,RIP+8(%rsp)
|
||
|
|
jmp error_swapgs
|
||
|
|
+ CFI_ENDPROC
|
||
|
|
END(error_entry)
|
||
|
|
|
||
|
|
|
||
|
|
@@ -1556,10 +1571,10 @@ ENTRY(nmi)
|
||
|
|
INTR_FRAME
|
||
|
|
PARAVIRT_ADJUST_EXCEPTION_FRAME
|
||
|
|
pushq_cfi $-1
|
||
|
|
- subq $15*8, %rsp
|
||
|
|
- CFI_ADJUST_CFA_OFFSET 15*8
|
||
|
|
+ subq $ORIG_RAX-R15, %rsp
|
||
|
|
+ CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15
|
||
|
|
call save_paranoid
|
||
|
|
- DEFAULT_FRAME 0
|
||
|
|
+ DEFAULT_FRAME -1
|
||
|
|
/* paranoidentry do_nmi, 0; without TRACE_IRQS_OFF */
|
||
|
|
movq %rsp,%rdi
|
||
|
|
movq $-1,%rsi
|
||
|
|
--- a/arch/x86/kernel/head_64.S
|
||
|
|
+++ b/arch/x86/kernel/head_64.S
|
||
|
|
@@ -285,6 +285,8 @@ early_idt_handlers:
|
||
|
|
|
||
|
|
ENTRY(early_idt_handler)
|
||
|
|
#ifdef CONFIG_EARLY_PRINTK
|
||
|
|
+#include <asm/calling.h>
|
||
|
|
+#include <asm/dwarf2.h>
|
||
|
|
cmpl $2,early_recursion_flag(%rip)
|
||
|
|
jz 1f
|
||
|
|
incl early_recursion_flag(%rip)
|
||
|
|
@@ -300,6 +302,16 @@ ENTRY(early_idt_handler)
|
||
|
|
testl $0x27d00,%eax
|
||
|
|
je 0f
|
||
|
|
popq %r8 # get error code
|
||
|
|
+
|
||
|
|
+ CFI_STARTPROC simple
|
||
|
|
+ CFI_SIGNAL_FRAME
|
||
|
|
+ CFI_DEF_CFA rsp, SS+8-RIP
|
||
|
|
+# CFI_REL_OFFSET ss, SS-RIP
|
||
|
|
+ CFI_REL_OFFSET rsp, RSP-RIP
|
||
|
|
+# CFI_REL_OFFSET rflags, EFLAGS-RIP
|
||
|
|
+# CFI_REL_OFFSET cs, CS-RIP
|
||
|
|
+ CFI_REL_OFFSET rip, RIP-RIP
|
||
|
|
+
|
||
|
|
0: movq 0(%rsp),%rcx # get ip
|
||
|
|
movq 8(%rsp),%rdx # get cs
|
||
|
|
xorl %eax,%eax
|
||
|
|
@@ -313,6 +325,7 @@ ENTRY(early_idt_handler)
|
||
|
|
movq 0(%rsp),%rsi # get rip again
|
||
|
|
call __print_symbol
|
||
|
|
#endif
|
||
|
|
+ CFI_ENDPROC
|
||
|
|
#endif /* EARLY_PRINTK */
|
||
|
|
1: hlt
|
||
|
|
jmp 1b
|