mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-15 07:46:43 +07:00
da6a91252a
The trampoline code is used by kretprobes to capture a return from a probed function. This is done by saving the registers, calling the handler, and restoring the registers. The code then returns to the original saved caller return address. It is necessary to do this directly instead of using a software breakpoint because the code used in processing that breakpoint could itself be kprobe'd and cause a problematic reentry into the debug exception handler. Signed-off-by: William Cohen <wcohen@redhat.com> Signed-off-by: David A. Long <dave.long@linaro.org> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> [catalin.marinas@arm.com: removed unnecessary masking of the PSTATE bits] Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
145 lines
6.4 KiB
C
145 lines
6.4 KiB
C
/*
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* Based on arch/arm/kernel/asm-offsets.c
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*
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* Copyright (C) 1995-2003 Russell King
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* 2001-2002 Keith Owens
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* Copyright (C) 2012 ARM Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/sched.h>
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#include <linux/mm.h>
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#include <linux/dma-mapping.h>
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#include <linux/kvm_host.h>
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#include <linux/suspend.h>
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#include <asm/thread_info.h>
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#include <asm/memory.h>
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#include <asm/smp_plat.h>
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#include <asm/suspend.h>
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#include <asm/vdso_datapage.h>
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#include <linux/kbuild.h>
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#include <linux/arm-smccc.h>
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int main(void)
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{
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DEFINE(TSK_ACTIVE_MM, offsetof(struct task_struct, active_mm));
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BLANK();
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DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
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DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count));
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DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
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DEFINE(TI_TASK, offsetof(struct thread_info, task));
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DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
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BLANK();
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DEFINE(THREAD_CPU_CONTEXT, offsetof(struct task_struct, thread.cpu_context));
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BLANK();
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DEFINE(S_X0, offsetof(struct pt_regs, regs[0]));
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DEFINE(S_X1, offsetof(struct pt_regs, regs[1]));
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DEFINE(S_X2, offsetof(struct pt_regs, regs[2]));
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DEFINE(S_X3, offsetof(struct pt_regs, regs[3]));
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DEFINE(S_X4, offsetof(struct pt_regs, regs[4]));
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DEFINE(S_X5, offsetof(struct pt_regs, regs[5]));
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DEFINE(S_X6, offsetof(struct pt_regs, regs[6]));
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DEFINE(S_X7, offsetof(struct pt_regs, regs[7]));
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DEFINE(S_X8, offsetof(struct pt_regs, regs[8]));
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DEFINE(S_X10, offsetof(struct pt_regs, regs[10]));
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DEFINE(S_X12, offsetof(struct pt_regs, regs[12]));
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DEFINE(S_X14, offsetof(struct pt_regs, regs[14]));
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DEFINE(S_X16, offsetof(struct pt_regs, regs[16]));
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DEFINE(S_X18, offsetof(struct pt_regs, regs[18]));
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DEFINE(S_X20, offsetof(struct pt_regs, regs[20]));
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DEFINE(S_X22, offsetof(struct pt_regs, regs[22]));
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DEFINE(S_X24, offsetof(struct pt_regs, regs[24]));
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DEFINE(S_X26, offsetof(struct pt_regs, regs[26]));
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DEFINE(S_X28, offsetof(struct pt_regs, regs[28]));
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DEFINE(S_LR, offsetof(struct pt_regs, regs[30]));
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DEFINE(S_SP, offsetof(struct pt_regs, sp));
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#ifdef CONFIG_COMPAT
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DEFINE(S_COMPAT_SP, offsetof(struct pt_regs, compat_sp));
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#endif
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DEFINE(S_PSTATE, offsetof(struct pt_regs, pstate));
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DEFINE(S_PC, offsetof(struct pt_regs, pc));
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DEFINE(S_ORIG_X0, offsetof(struct pt_regs, orig_x0));
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DEFINE(S_SYSCALLNO, offsetof(struct pt_regs, syscallno));
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DEFINE(S_FRAME_SIZE, sizeof(struct pt_regs));
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BLANK();
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DEFINE(MM_CONTEXT_ID, offsetof(struct mm_struct, context.id.counter));
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BLANK();
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DEFINE(VMA_VM_MM, offsetof(struct vm_area_struct, vm_mm));
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DEFINE(VMA_VM_FLAGS, offsetof(struct vm_area_struct, vm_flags));
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BLANK();
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DEFINE(VM_EXEC, VM_EXEC);
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BLANK();
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DEFINE(PAGE_SZ, PAGE_SIZE);
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BLANK();
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DEFINE(DMA_BIDIRECTIONAL, DMA_BIDIRECTIONAL);
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DEFINE(DMA_TO_DEVICE, DMA_TO_DEVICE);
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DEFINE(DMA_FROM_DEVICE, DMA_FROM_DEVICE);
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BLANK();
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DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
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DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
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DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
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DEFINE(CLOCK_REALTIME_COARSE, CLOCK_REALTIME_COARSE);
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DEFINE(CLOCK_MONOTONIC_COARSE,CLOCK_MONOTONIC_COARSE);
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DEFINE(CLOCK_COARSE_RES, LOW_RES_NSEC);
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DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
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BLANK();
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DEFINE(VDSO_CS_CYCLE_LAST, offsetof(struct vdso_data, cs_cycle_last));
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DEFINE(VDSO_XTIME_CLK_SEC, offsetof(struct vdso_data, xtime_clock_sec));
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DEFINE(VDSO_XTIME_CLK_NSEC, offsetof(struct vdso_data, xtime_clock_nsec));
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DEFINE(VDSO_XTIME_CRS_SEC, offsetof(struct vdso_data, xtime_coarse_sec));
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DEFINE(VDSO_XTIME_CRS_NSEC, offsetof(struct vdso_data, xtime_coarse_nsec));
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DEFINE(VDSO_WTM_CLK_SEC, offsetof(struct vdso_data, wtm_clock_sec));
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DEFINE(VDSO_WTM_CLK_NSEC, offsetof(struct vdso_data, wtm_clock_nsec));
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DEFINE(VDSO_TB_SEQ_COUNT, offsetof(struct vdso_data, tb_seq_count));
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DEFINE(VDSO_CS_MULT, offsetof(struct vdso_data, cs_mult));
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DEFINE(VDSO_CS_SHIFT, offsetof(struct vdso_data, cs_shift));
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DEFINE(VDSO_TZ_MINWEST, offsetof(struct vdso_data, tz_minuteswest));
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DEFINE(VDSO_TZ_DSTTIME, offsetof(struct vdso_data, tz_dsttime));
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DEFINE(VDSO_USE_SYSCALL, offsetof(struct vdso_data, use_syscall));
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BLANK();
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DEFINE(TVAL_TV_SEC, offsetof(struct timeval, tv_sec));
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DEFINE(TVAL_TV_USEC, offsetof(struct timeval, tv_usec));
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DEFINE(TSPEC_TV_SEC, offsetof(struct timespec, tv_sec));
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DEFINE(TSPEC_TV_NSEC, offsetof(struct timespec, tv_nsec));
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BLANK();
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DEFINE(TZ_MINWEST, offsetof(struct timezone, tz_minuteswest));
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DEFINE(TZ_DSTTIME, offsetof(struct timezone, tz_dsttime));
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BLANK();
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DEFINE(CPU_BOOT_STACK, offsetof(struct secondary_data, stack));
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BLANK();
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#ifdef CONFIG_KVM_ARM_HOST
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DEFINE(VCPU_CONTEXT, offsetof(struct kvm_vcpu, arch.ctxt));
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DEFINE(CPU_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs));
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DEFINE(CPU_USER_PT_REGS, offsetof(struct kvm_regs, regs));
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DEFINE(CPU_FP_REGS, offsetof(struct kvm_regs, fp_regs));
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DEFINE(VCPU_FPEXC32_EL2, offsetof(struct kvm_vcpu, arch.ctxt.sys_regs[FPEXC32_EL2]));
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DEFINE(VCPU_HOST_CONTEXT, offsetof(struct kvm_vcpu, arch.host_cpu_context));
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#endif
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#ifdef CONFIG_CPU_PM
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DEFINE(CPU_SUSPEND_SZ, sizeof(struct cpu_suspend_ctx));
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DEFINE(CPU_CTX_SP, offsetof(struct cpu_suspend_ctx, sp));
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DEFINE(MPIDR_HASH_MASK, offsetof(struct mpidr_hash, mask));
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DEFINE(MPIDR_HASH_SHIFTS, offsetof(struct mpidr_hash, shift_aff));
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DEFINE(SLEEP_STACK_DATA_SYSTEM_REGS, offsetof(struct sleep_stack_data, system_regs));
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DEFINE(SLEEP_STACK_DATA_CALLEE_REGS, offsetof(struct sleep_stack_data, callee_saved_regs));
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#endif
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DEFINE(ARM_SMCCC_RES_X0_OFFS, offsetof(struct arm_smccc_res, a0));
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DEFINE(ARM_SMCCC_RES_X2_OFFS, offsetof(struct arm_smccc_res, a2));
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BLANK();
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DEFINE(HIBERN_PBE_ORIG, offsetof(struct pbe, orig_address));
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DEFINE(HIBERN_PBE_ADDR, offsetof(struct pbe, address));
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DEFINE(HIBERN_PBE_NEXT, offsetof(struct pbe, next));
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return 0;
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}
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