diff options
Diffstat (limited to 'externals/breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc')
| -rw-r--r-- | externals/breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/externals/breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc b/externals/breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc new file mode 100644 index 0000000000..7649768355 --- /dev/null +++ b/externals/breakpad/src/client/linux/dump_writer_common/ucontext_reader.cc @@ -0,0 +1,329 @@ +// Copyright 2014 Google LLC +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google LLC nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#ifdef HAVE_CONFIG_H +#include <config.h> // Must come first +#endif + +#include "client/linux/dump_writer_common/ucontext_reader.h" + +#include "common/linux/linux_libc_support.h" +#include "google_breakpad/common/minidump_format.h" + +namespace google_breakpad { + +// Minidump defines register structures which are different from the raw +// structures which we get from the kernel. These are platform specific +// functions to juggle the ucontext_t and user structures into minidump format. + +#if defined(__i386__) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.gregs[REG_ESP]; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.gregs[REG_EIP]; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc, + const fpstate_t* fp) { + const greg_t* regs = uc->uc_mcontext.gregs; + + out->context_flags = MD_CONTEXT_X86_FULL | + MD_CONTEXT_X86_FLOATING_POINT; + + out->gs = regs[REG_GS]; + out->fs = regs[REG_FS]; + out->es = regs[REG_ES]; + out->ds = regs[REG_DS]; + + out->edi = regs[REG_EDI]; + out->esi = regs[REG_ESI]; + out->ebx = regs[REG_EBX]; + out->edx = regs[REG_EDX]; + out->ecx = regs[REG_ECX]; + out->eax = regs[REG_EAX]; + + out->ebp = regs[REG_EBP]; + out->eip = regs[REG_EIP]; + out->cs = regs[REG_CS]; + out->eflags = regs[REG_EFL]; + out->esp = regs[REG_UESP]; + out->ss = regs[REG_SS]; + + out->float_save.control_word = fp->cw; + out->float_save.status_word = fp->sw; + out->float_save.tag_word = fp->tag; + out->float_save.error_offset = fp->ipoff; + out->float_save.error_selector = fp->cssel; + out->float_save.data_offset = fp->dataoff; + out->float_save.data_selector = fp->datasel; + + // 8 registers * 10 bytes per register. + my_memcpy(out->float_save.register_area, fp->_st, 10 * 8); +} + +#elif defined(__x86_64) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.gregs[REG_RSP]; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.gregs[REG_RIP]; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc, + const fpstate_t* fpregs) { + const greg_t* regs = uc->uc_mcontext.gregs; + + out->context_flags = MD_CONTEXT_AMD64_FULL; + + out->cs = regs[REG_CSGSFS] & 0xffff; + + out->fs = (regs[REG_CSGSFS] >> 32) & 0xffff; + out->gs = (regs[REG_CSGSFS] >> 16) & 0xffff; + + out->eflags = regs[REG_EFL]; + + out->rax = regs[REG_RAX]; + out->rcx = regs[REG_RCX]; + out->rdx = regs[REG_RDX]; + out->rbx = regs[REG_RBX]; + + out->rsp = regs[REG_RSP]; + out->rbp = regs[REG_RBP]; + out->rsi = regs[REG_RSI]; + out->rdi = regs[REG_RDI]; + out->r8 = regs[REG_R8]; + out->r9 = regs[REG_R9]; + out->r10 = regs[REG_R10]; + out->r11 = regs[REG_R11]; + out->r12 = regs[REG_R12]; + out->r13 = regs[REG_R13]; + out->r14 = regs[REG_R14]; + out->r15 = regs[REG_R15]; + + out->rip = regs[REG_RIP]; + + out->flt_save.control_word = fpregs->cwd; + out->flt_save.status_word = fpregs->swd; + out->flt_save.tag_word = fpregs->ftw; + out->flt_save.error_opcode = fpregs->fop; + out->flt_save.error_offset = fpregs->rip; + out->flt_save.data_offset = fpregs->rdp; + out->flt_save.error_selector = 0; // We don't have this. + out->flt_save.data_selector = 0; // We don't have this. + out->flt_save.mx_csr = fpregs->mxcsr; + out->flt_save.mx_csr_mask = fpregs->mxcr_mask; + my_memcpy(&out->flt_save.float_registers, &fpregs->_st, 8 * 16); + my_memcpy(&out->flt_save.xmm_registers, &fpregs->_xmm, 16 * 16); +} + +#elif defined(__ARM_EABI__) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.arm_sp; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.arm_pc; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc) { + out->context_flags = MD_CONTEXT_ARM_FULL; + + out->iregs[0] = uc->uc_mcontext.arm_r0; + out->iregs[1] = uc->uc_mcontext.arm_r1; + out->iregs[2] = uc->uc_mcontext.arm_r2; + out->iregs[3] = uc->uc_mcontext.arm_r3; + out->iregs[4] = uc->uc_mcontext.arm_r4; + out->iregs[5] = uc->uc_mcontext.arm_r5; + out->iregs[6] = uc->uc_mcontext.arm_r6; + out->iregs[7] = uc->uc_mcontext.arm_r7; + out->iregs[8] = uc->uc_mcontext.arm_r8; + out->iregs[9] = uc->uc_mcontext.arm_r9; + out->iregs[10] = uc->uc_mcontext.arm_r10; + + out->iregs[11] = uc->uc_mcontext.arm_fp; + out->iregs[12] = uc->uc_mcontext.arm_ip; + out->iregs[13] = uc->uc_mcontext.arm_sp; + out->iregs[14] = uc->uc_mcontext.arm_lr; + out->iregs[15] = uc->uc_mcontext.arm_pc; + + out->cpsr = uc->uc_mcontext.arm_cpsr; + + // TODO: fix this after fixing ExceptionHandler + out->float_save.fpscr = 0; + my_memset(&out->float_save.regs, 0, sizeof(out->float_save.regs)); + my_memset(&out->float_save.extra, 0, sizeof(out->float_save.extra)); +} + +#elif defined(__aarch64__) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.sp; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.pc; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc, + const struct fpsimd_context* fpregs) { + out->context_flags = MD_CONTEXT_ARM64_FULL_OLD; + + out->cpsr = static_cast<uint32_t>(uc->uc_mcontext.pstate); + for (int i = 0; i < MD_CONTEXT_ARM64_REG_SP; ++i) + out->iregs[i] = uc->uc_mcontext.regs[i]; + out->iregs[MD_CONTEXT_ARM64_REG_SP] = uc->uc_mcontext.sp; + out->iregs[MD_CONTEXT_ARM64_REG_PC] = uc->uc_mcontext.pc; + + out->float_save.fpsr = fpregs->fpsr; + out->float_save.fpcr = fpregs->fpcr; + my_memcpy(&out->float_save.regs, &fpregs->vregs, + MD_FLOATINGSAVEAREA_ARM64_FPR_COUNT * 16); +} + +#elif defined(__mips__) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.gregs[MD_CONTEXT_MIPS_REG_SP]; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.pc; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc) { +#if _MIPS_SIM == _ABI64 + out->context_flags = MD_CONTEXT_MIPS64_FULL; +#elif _MIPS_SIM == _ABIO32 + out->context_flags = MD_CONTEXT_MIPS_FULL; +#else +#error "This mips ABI is currently not supported (n32)" +#endif + + for (int i = 0; i < MD_CONTEXT_MIPS_GPR_COUNT; ++i) + out->iregs[i] = uc->uc_mcontext.gregs[i]; + + out->mdhi = uc->uc_mcontext.mdhi; + out->mdlo = uc->uc_mcontext.mdlo; + + out->hi[0] = uc->uc_mcontext.hi1; + out->hi[1] = uc->uc_mcontext.hi2; + out->hi[2] = uc->uc_mcontext.hi3; + out->lo[0] = uc->uc_mcontext.lo1; + out->lo[1] = uc->uc_mcontext.lo2; + out->lo[2] = uc->uc_mcontext.lo3; + out->dsp_control = uc->uc_mcontext.dsp; + + out->epc = uc->uc_mcontext.pc; + out->badvaddr = 0; // Not reported in signal context. + out->status = 0; // Not reported in signal context. + out->cause = 0; // Not reported in signal context. + + for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i) + out->float_save.regs[i] = uc->uc_mcontext.fpregs.fp_r.fp_dregs[i]; + + out->float_save.fpcsr = uc->uc_mcontext.fpc_csr; +#if _MIPS_SIM == _ABIO32 + out->float_save.fir = uc->uc_mcontext.fpc_eir; // Unused. +#endif +} + +#elif defined(__riscv) + +uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { + return uc->uc_mcontext.__gregs[MD_CONTEXT_RISCV_REG_SP]; +} + +uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { + return uc->uc_mcontext.__gregs[MD_CONTEXT_RISCV_REG_PC]; +} + +void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc) { +# if __riscv__xlen == 32 + out->context_flags = MD_CONTEXT_RISCV_FULL; +# elif __riscv_xlen == 64 + out->context_flags = MD_CONTEXT_RISCV64_FULL; +# else +# error "Unexpected __riscv_xlen" +# endif + + out->pc = uc->uc_mcontext.__gregs[0]; + out->ra = uc->uc_mcontext.__gregs[1]; + out->sp = uc->uc_mcontext.__gregs[2]; + out->gp = uc->uc_mcontext.__gregs[3]; + out->tp = uc->uc_mcontext.__gregs[4]; + out->t0 = uc->uc_mcontext.__gregs[5]; + out->t1 = uc->uc_mcontext.__gregs[6]; + out->t2 = uc->uc_mcontext.__gregs[7]; + out->s0 = uc->uc_mcontext.__gregs[8]; + out->s1 = uc->uc_mcontext.__gregs[9]; + out->a0 = uc->uc_mcontext.__gregs[10]; + out->a1 = uc->uc_mcontext.__gregs[11]; + out->a2 = uc->uc_mcontext.__gregs[12]; + out->a3 = uc->uc_mcontext.__gregs[13]; + out->a4 = uc->uc_mcontext.__gregs[14]; + out->a5 = uc->uc_mcontext.__gregs[15]; + out->a6 = uc->uc_mcontext.__gregs[16]; + out->a7 = uc->uc_mcontext.__gregs[17]; + out->s2 = uc->uc_mcontext.__gregs[18]; + out->s3 = uc->uc_mcontext.__gregs[19]; + out->s4 = uc->uc_mcontext.__gregs[20]; + out->s5 = uc->uc_mcontext.__gregs[21]; + out->s6 = uc->uc_mcontext.__gregs[22]; + out->s7 = uc->uc_mcontext.__gregs[23]; + out->s8 = uc->uc_mcontext.__gregs[24]; + out->s9 = uc->uc_mcontext.__gregs[25]; + out->s10 = uc->uc_mcontext.__gregs[26]; + out->s11 = uc->uc_mcontext.__gregs[27]; + out->t3 = uc->uc_mcontext.__gregs[28]; + out->t4 = uc->uc_mcontext.__gregs[29]; + out->t5 = uc->uc_mcontext.__gregs[30]; + out->t6 = uc->uc_mcontext.__gregs[31]; + + // Breakpad only supports RISCV32 with 32 bit floating point. + // Breakpad only supports RISCV64 with 64 bit floating point. +#if __riscv_xlen == 32 + for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++) + out->fpregs[i] = uc->uc_mcontext.__fpregs.__f.__f[i]; + out->fcsr = uc->uc_mcontext.__fpregs.__f.__fcsr; +#elif __riscv_xlen == 64 + for (int i = 0; i < MD_CONTEXT_RISCV_FPR_COUNT; i++) + out->fpregs[i] = uc->uc_mcontext.__fpregs.__d.__f[i]; + out->fcsr = uc->uc_mcontext.__fpregs.__d.__fcsr; +#else +#error "Unexpected __riscv_xlen" +#endif +} +#endif + +} // namespace google_breakpad |