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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SANDBOX_LINUX_BPF_DSL_SECCOMP_MACROS_H_
#define SANDBOX_LINUX_BPF_DSL_SECCOMP_MACROS_H_
#include <sys/types.h> // For __BIONIC__.
// Old Bionic versions do not have sys/user.h. The if can be removed once we no
// longer need to support these old Bionic versions.
// All x86_64 builds use a new enough bionic to have sys/user.h.
#if !defined(__BIONIC__) || defined(__x86_64__)
#include <sys/user.h>
#if defined(__mips__)
// sys/user.h in eglibc misses size_t definition
#include <stddef.h>
#elif defined(__powerpc64__)
// Manually define greg_t on ppc64
typedef unsigned long long greg_t;
#endif
#endif
#include "build/build_config.h"
#include "sandbox/linux/system_headers/linux_seccomp.h" // For AUDIT_ARCH_*
// Impose some reasonable maximum BPF program size. Realistically, the
// kernel probably has much lower limits. But by limiting to less than
// 30 bits, we can ease requirements on some of our data types.
#define SECCOMP_MAX_PROGRAM_SIZE (1<<30)
#if defined(__i386__)
#define SECCOMP_ARCH AUDIT_ARCH_I386
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.gregs[(_reg)])
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, REG_EAX)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, REG_EAX)
#define SECCOMP_IP(_ctx) SECCOMP_REG(_ctx, REG_EIP)
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, REG_EBX)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, REG_ECX)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, REG_EDX)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, REG_ESI)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, REG_EDI)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, REG_EBP)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 0)
#if defined(__BIONIC__)
// Old Bionic versions don't have sys/user.h, so we just define regs_struct
// directly. This can be removed once we no longer need to support these old
// Bionic versions.
struct regs_struct {
long int ebx;
long int ecx;
long int edx;
long int esi;
long int edi;
long int ebp;
long int eax;
long int xds;
long int xes;
long int xfs;
long int xgs;
long int orig_eax;
long int eip;
long int xcs;
long int eflags;
long int esp;
long int xss;
};
#else
typedef user_regs_struct regs_struct;
#endif
#define SECCOMP_PT_RESULT(_regs) (_regs).eax
#define SECCOMP_PT_SYSCALL(_regs) (_regs).orig_eax
#define SECCOMP_PT_IP(_regs) (_regs).eip
#define SECCOMP_PT_PARM1(_regs) (_regs).ebx
#define SECCOMP_PT_PARM2(_regs) (_regs).ecx
#define SECCOMP_PT_PARM3(_regs) (_regs).edx
#define SECCOMP_PT_PARM4(_regs) (_regs).esi
#define SECCOMP_PT_PARM5(_regs) (_regs).edi
#define SECCOMP_PT_PARM6(_regs) (_regs).ebp
#elif defined(__x86_64__)
#define SECCOMP_ARCH AUDIT_ARCH_X86_64
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.gregs[(_reg)])
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, REG_RAX)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, REG_RAX)
#define SECCOMP_IP(_ctx) SECCOMP_REG(_ctx, REG_RIP)
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, REG_RDI)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, REG_RSI)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, REG_RDX)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, REG_R10)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, REG_R8)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, REG_R9)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 0)
typedef user_regs_struct regs_struct;
#define SECCOMP_PT_RESULT(_regs) (_regs).rax
#define SECCOMP_PT_SYSCALL(_regs) (_regs).orig_rax
#define SECCOMP_PT_IP(_regs) (_regs).rip
#define SECCOMP_PT_PARM1(_regs) (_regs).rdi
#define SECCOMP_PT_PARM2(_regs) (_regs).rsi
#define SECCOMP_PT_PARM3(_regs) (_regs).rdx
#define SECCOMP_PT_PARM4(_regs) (_regs).r10
#define SECCOMP_PT_PARM5(_regs) (_regs).r8
#define SECCOMP_PT_PARM6(_regs) (_regs).r9
#elif defined(__arm__) && (defined(__thumb__) || defined(__ARM_EABI__))
#define SECCOMP_ARCH AUDIT_ARCH_ARM
// ARM sigcontext_t is different from i386/x86_64.
// See </arch/arm/include/asm/sigcontext.h> in the Linux kernel.
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.arm_##_reg)
// ARM EABI syscall convention.
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, r0)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, r7)
#define SECCOMP_IP(_ctx) SECCOMP_REG(_ctx, pc)
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, r0)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, r1)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, r2)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, r3)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, r4)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, r5)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 0)
#if defined(__BIONIC__)
// Old Bionic versions don't have sys/user.h, so we just define regs_struct
// directly. This can be removed once we no longer need to support these old
// Bionic versions.
struct regs_struct {
unsigned long uregs[18];
};
#else
typedef user_regs regs_struct;
#endif
#define REG_cpsr uregs[16]
#define REG_pc uregs[15]
#define REG_lr uregs[14]
#define REG_sp uregs[13]
#define REG_ip uregs[12]
#define REG_fp uregs[11]
#define REG_r10 uregs[10]
#define REG_r9 uregs[9]
#define REG_r8 uregs[8]
#define REG_r7 uregs[7]
#define REG_r6 uregs[6]
#define REG_r5 uregs[5]
#define REG_r4 uregs[4]
#define REG_r3 uregs[3]
#define REG_r2 uregs[2]
#define REG_r1 uregs[1]
#define REG_r0 uregs[0]
#define REG_ORIG_r0 uregs[17]
#define SECCOMP_PT_RESULT(_regs) (_regs).REG_r0
#define SECCOMP_PT_SYSCALL(_regs) (_regs).REG_r7
#define SECCOMP_PT_IP(_regs) (_regs).REG_pc
#define SECCOMP_PT_PARM1(_regs) (_regs).REG_r0
#define SECCOMP_PT_PARM2(_regs) (_regs).REG_r1
#define SECCOMP_PT_PARM3(_regs) (_regs).REG_r2
#define SECCOMP_PT_PARM4(_regs) (_regs).REG_r3
#define SECCOMP_PT_PARM5(_regs) (_regs).REG_r4
#define SECCOMP_PT_PARM6(_regs) (_regs).REG_r5
#elif defined(ARCH_CPU_MIPS_FAMILY) && defined(ARCH_CPU_32_BITS)
#define SECCOMP_ARCH AUDIT_ARCH_MIPSEL
#define SYSCALL_EIGHT_ARGS
// MIPS sigcontext_t is different from i386/x86_64 and ARM.
// See </arch/mips/include/uapi/asm/sigcontext.h> in the Linux kernel.
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.gregs[_reg])
// Based on MIPS o32 ABI syscall convention.
// On MIPS, when indirect syscall is being made (syscall(__NR_foo)),
// real identificator (__NR_foo) is not in v0, but in a0
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, 2)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, 2)
#define SECCOMP_IP(_ctx) (_ctx)->uc_mcontext.pc
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, 4)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, 5)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, 6)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, 7)
// Only the first 4 arguments of syscall are in registers.
// The rest are on the stack.
#define SECCOMP_STACKPARM(_ctx, n) (((long *)SECCOMP_REG(_ctx, 29))[(n)])
#define SECCOMP_PARM5(_ctx) SECCOMP_STACKPARM(_ctx, 4)
#define SECCOMP_PARM6(_ctx) SECCOMP_STACKPARM(_ctx, 5)
#define SECCOMP_PARM7(_ctx) SECCOMP_STACKPARM(_ctx, 6)
#define SECCOMP_PARM8(_ctx) SECCOMP_STACKPARM(_ctx, 7)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 0)
// On MIPS we don't have structures like user_regs or user_regs_struct in
// sys/user.h that we could use, so we just define regs_struct directly.
struct regs_struct {
unsigned long long regs[32];
};
#define REG_a3 regs[7]
#define REG_a2 regs[6]
#define REG_a1 regs[5]
#define REG_a0 regs[4]
#define REG_v1 regs[3]
#define REG_v0 regs[2]
#define SECCOMP_PT_RESULT(_regs) (_regs).REG_v0
#define SECCOMP_PT_SYSCALL(_regs) (_regs).REG_v0
#define SECCOMP_PT_PARM1(_regs) (_regs).REG_a0
#define SECCOMP_PT_PARM2(_regs) (_regs).REG_a1
#define SECCOMP_PT_PARM3(_regs) (_regs).REG_a2
#define SECCOMP_PT_PARM4(_regs) (_regs).REG_a3
#elif defined(ARCH_CPU_MIPS_FAMILY) && defined(ARCH_CPU_64_BITS)
#define SECCOMP_ARCH AUDIT_ARCH_MIPSEL64
#define SYSCALL_EIGHT_ARGS
// MIPS sigcontext_t is different from i386/x86_64 and ARM.
// See </arch/mips/include/uapi/asm/sigcontext.h> in the Linux kernel.
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.gregs[_reg])
// Based on MIPS n64 ABI syscall convention.
// On MIPS, when an indirect syscall is being made (syscall(__NR_foo)),
// the real identifier (__NR_foo) is not in v0, but in a0.
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, 2)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, 2)
#define SECCOMP_IP(_ctx) (_ctx)->uc_mcontext.pc
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, 4)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, 5)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, 6)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, 7)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, 8)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, 9)
#define SECCOMP_PARM7(_ctx) SECCOMP_REG(_ctx, 10)
#define SECCOMP_PARM8(_ctx) SECCOMP_REG(_ctx, 11)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX (offsetof(struct arch_seccomp_data, \
instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) (offsetof(struct arch_seccomp_data, args) + \
8*(nr) + 0)
// On MIPS we don't have structures like user_regs or user_regs_struct in
// sys/user.h that we could use, so we just define regs_struct directly.
struct regs_struct {
unsigned long long regs[32];
};
#define REG_a7 regs[11]
#define REG_a6 regs[10]
#define REG_a5 regs[9]
#define REG_a4 regs[8]
#define REG_a3 regs[7]
#define REG_a2 regs[6]
#define REG_a1 regs[5]
#define REG_a0 regs[4]
#define REG_v1 regs[3]
#define REG_v0 regs[2]
#define SECCOMP_PT_RESULT(_regs) (_regs).REG_v0
#define SECCOMP_PT_SYSCALL(_regs) (_regs).REG_v0
#define SECCOMP_PT_PARM1(_regs) (_regs).REG_a0
#define SECCOMP_PT_PARM2(_regs) (_regs).REG_a1
#define SECCOMP_PT_PARM3(_regs) (_regs).REG_a2
#define SECCOMP_PT_PARM4(_regs) (_regs).REG_a3
#define SECCOMP_PT_PARM5(_regs) (_regs).REG_a4
#define SECCOMP_PT_PARM6(_regs) (_regs).REG_a5
#define SECCOMP_PT_PARM7(_regs) (_regs).REG_a6
#define SECCOMP_PT_PARM8(_regs) (_regs).REG_a7
#elif defined(__aarch64__)
struct regs_struct {
unsigned long long regs[31];
unsigned long long sp;
unsigned long long pc;
unsigned long long pstate;
};
#define SECCOMP_ARCH AUDIT_ARCH_AARCH64
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.regs[_reg])
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, 0)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, 8)
#define SECCOMP_IP(_ctx) (_ctx)->uc_mcontext.pc
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, 0)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, 1)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, 2)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, 3)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, 4)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, 5)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX \
(offsetof(struct arch_seccomp_data, instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX \
(offsetof(struct arch_seccomp_data, instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) \
(offsetof(struct arch_seccomp_data, args) + 8 * (nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) \
(offsetof(struct arch_seccomp_data, args) + 8 * (nr) + 0)
#define SECCOMP_PT_RESULT(_regs) (_regs).regs[0]
#define SECCOMP_PT_SYSCALL(_regs) (_regs).regs[8]
#define SECCOMP_PT_IP(_regs) (_regs).pc
#define SECCOMP_PT_PARM1(_regs) (_regs).regs[0]
#define SECCOMP_PT_PARM2(_regs) (_regs).regs[1]
#define SECCOMP_PT_PARM3(_regs) (_regs).regs[2]
#define SECCOMP_PT_PARM4(_regs) (_regs).regs[3]
#define SECCOMP_PT_PARM5(_regs) (_regs).regs[4]
#define SECCOMP_PT_PARM6(_regs) (_regs).regs[5]
#elif defined(__powerpc64__)
#include <asm/ptrace.h>
typedef struct pt_regs regs_struct;
#ifdef ARCH_CPU_LITTLE_ENDIAN
#define SECCOMP_ARCH AUDIT_ARCH_PPC64LE
#else
#define SECCOMP_ARCH AUDIT_ARCH_PPC64
#endif
#define SECCOMP_REG(_ctx, _reg) ((_ctx)->uc_mcontext.regs->gpr[_reg])
#define SECCOMP_RESULT(_ctx) SECCOMP_REG(_ctx, 3)
#define SECCOMP_SYSCALL(_ctx) SECCOMP_REG(_ctx, 0)
#define SECCOMP_IP(_ctx) (_ctx)->uc_mcontext.regs->nip
#define SECCOMP_PARM1(_ctx) SECCOMP_REG(_ctx, 3)
#define SECCOMP_PARM2(_ctx) SECCOMP_REG(_ctx, 4)
#define SECCOMP_PARM3(_ctx) SECCOMP_REG(_ctx, 5)
#define SECCOMP_PARM4(_ctx) SECCOMP_REG(_ctx, 6)
#define SECCOMP_PARM5(_ctx) SECCOMP_REG(_ctx, 7)
#define SECCOMP_PARM6(_ctx) SECCOMP_REG(_ctx, 8)
#define SECCOMP_NR_IDX (offsetof(struct arch_seccomp_data, nr))
#define SECCOMP_ARCH_IDX (offsetof(struct arch_seccomp_data, arch))
#define SECCOMP_IP_MSB_IDX \
(offsetof(struct arch_seccomp_data, instruction_pointer) + 4)
#define SECCOMP_IP_LSB_IDX \
(offsetof(struct arch_seccomp_data, instruction_pointer) + 0)
#define SECCOMP_ARG_MSB_IDX(nr) \
(offsetof(struct arch_seccomp_data, args) + 8 * (nr) + 4)
#define SECCOMP_ARG_LSB_IDX(nr) \
(offsetof(struct arch_seccomp_data, args) + 8 * (nr) + 0)
#define SECCOMP_PT_RESULT(_regs) (_regs).gpr[3]
#define SECCOMP_PT_SYSCALL(_regs) (_regs).gpr[0]
#define SECCOMP_PT_IP(_regs) (_regs).nip
#define SECCOMP_PT_PARM1(_regs) (_regs).gpr[3]
#define SECCOMP_PT_PARM2(_regs) (_regs).gpr[4]
#define SECCOMP_PT_PARM3(_regs) (_regs).gpr[5]
#define SECCOMP_PT_PARM4(_regs) (_regs).gpr[6]
#define SECCOMP_PT_PARM5(_regs) (_regs).gpr[7]
#define SECCOMP_PT_PARM6(_regs) (_regs).gpr[8]
#else
#error Unsupported target platform
#endif
#endif // SANDBOX_LINUX_BPF_DSL_SECCOMP_MACROS_H_
|
