| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // 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__) |
| #if !defined(__native_client_nonsfi__) |
| #include <sys/user.h> |
| #endif |
| #if defined(__mips__) |
| // sys/user.h in eglibc misses size_t definition |
| #include <stddef.h> |
| #endif |
| #endif |
| |
| #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__) || defined(__native_client_nonsfi__) |
| // Old Bionic versions and PNaCl toolchain 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 and PNaCl toolchain. |
| 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__) || defined(__native_client_nonsfi__) |
| // Old Bionic versions and PNaCl toolchain 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 and PNaCl toolchain. |
| 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(__mips__) && (_MIPS_SIM == _MIPS_SIM_ABI32) |
| #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(__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] |
| #else |
| #error Unsupported target platform |
| |
| #endif |
| |
| #endif // SANDBOX_LINUX_BPF_DSL_SECCOMP_MACROS_H_ |
