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250 lines
6.5 KiB
250 lines
6.5 KiB
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
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Automatically created from "patches.arch/x86_64-unwind-annotations" by xen-port-patches.py
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--- head-2011-01-30.orig/arch/x86/kernel/entry_64-xen.S 2011-02-02 15:07:22.000000000 +0100
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+++ head-2011-01-30/arch/x86/kernel/entry_64-xen.S 2011-02-02 15:09:22.000000000 +0100
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@@ -223,23 +223,16 @@ NMI_MASK = 0x80000000
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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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+ * initial frame state for syscall
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*/
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- .macro EMPTY_FRAME start=1 offset=0
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+ .macro BASIC_FRAME start=1 offset=0
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.if \start
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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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+ CFI_DEF_CFA rsp, SS+8+\offset-RIP
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.else
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- CFI_DEF_CFA_OFFSET 8+\offset
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+ CFI_DEF_CFA_OFFSET SS+8+\offset-RIP
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.endif
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- .endm
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-
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-/*
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- * initial frame state for syscall
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- */
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- .macro BASIC_FRAME start=1 offset=0
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- EMPTY_FRAME \start, SS+8+\offset-RIP
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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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@@ -266,14 +259,15 @@ NMI_MASK = 0x80000000
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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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.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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+ .if \start >= 0
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XCPT_FRAME 2*\start, 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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@@ -289,7 +283,9 @@ NMI_MASK = 0x80000000
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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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+ .if \start >= -1
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PARTIAL_FRAME \start, 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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@@ -329,25 +325,27 @@ NMI_MASK = 0x80000000
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/* save partial stack frame */
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.pushsection .kprobes.text, "ax"
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ENTRY(save_args)
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- XCPT_FRAME
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+ XCPT_FRAME offset=ORIG_RAX-RBP+8
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cld
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/*
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* start from rbp in pt_regs and jump over
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* return address.
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*/
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movq_cfi rdi, RDI+8-RBP
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- movq_cfi rsi, RSI+8-RBP
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- movq_cfi rdx, RDX+8-RBP
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- movq_cfi rcx, RCX+8-RBP
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+ movq %rsi, RSI+8-RBP(%rsp)
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+ movq %rdx, RDX+8-RBP(%rsp)
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+ movq %rcx, RCX+8-RBP(%rsp)
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movq_cfi rax, RAX+8-RBP
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- movq_cfi r8, R8+8-RBP
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- movq_cfi r9, R9+8-RBP
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- movq_cfi r10, R10+8-RBP
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- movq_cfi r11, R11+8-RBP
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+ movq %r8, R8+8-RBP(%rsp)
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+ movq %r9, R9+8-RBP(%rsp)
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+ movq %r10, R10+8-RBP(%rsp)
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+ movq %r11, R11+8-RBP(%rsp)
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leaq -RBP+8(%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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@@ -359,11 +357,10 @@ 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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@@ -375,14 +372,14 @@ END(save_args)
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#endif
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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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@@ -393,23 +390,23 @@ 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=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 %rdi, RDI+8(%rsp)
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+ movq %rsi, RSI+8(%rsp)
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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 %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, 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 %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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@@ -692,7 +689,7 @@ 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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@@ -905,7 +902,7 @@ ENTRY(\sym)
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subq $ORIG_RAX-R15-1*8,%rsp
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CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15-1*8
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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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@@ -932,7 +929,7 @@ ENTRY(\sym)
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subq $ORIG_RAX-R15-2*8,%rsp
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CFI_ADJUST_CFA_OFFSET ORIG_RAX-R15-2*8
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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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@@ -1254,25 +1251,24 @@ END(paranoid_exit)
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* returns in "no swapgs flag" in %ebx.
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*/
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ENTRY(error_entry)
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- XCPT_FRAME 2
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- CFI_ADJUST_CFA_OFFSET 15*8
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+ XCPT_FRAME start=2 offset=ORIG_RAX-R15+8
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/* oldrax contains error code */
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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 %rdi, RDI+8(%rsp)
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+ movq %rsi, RSI+8(%rsp)
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+ movq %rdx, RDX+8(%rsp)
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+ movq %rcx, RCX+8(%rsp)
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+ movq %rax, RAX+8(%rsp)
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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, 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 %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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#ifndef CONFIG_XEN
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xorl %ebx,%ebx
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testl $3,CS+8(%rsp)
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@@ -1293,6 +1289,7 @@ error_sti:
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* compat mode. Check for these here too.
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*/
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error_kernelspace:
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+ CFI_REL_OFFSET rcx, RCX+8
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incl %ebx
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leaq irq_return(%rip),%rcx
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cmpq %rcx,RIP+8(%rsp)
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