#ifdef HAVE_CONFIG_H
#include <config.h>
#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 {
#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;
my_memcpy(out->float_save.register_area, fp->_st, 10 * 8);
}
#elif defined(__x86_64)
uintptr_t UContextReader::GetStackPointer(const ucontext_t* uc) { … }
uintptr_t UContextReader::GetInstructionPointer(const ucontext_t* uc) { … }
void UContextReader::FillCPUContext(RawContextCPU* out, const ucontext_t* uc,
const fpstate_t* fpregs) { … }
#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;
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;
out->status = 0;
out->cause = 0;
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;
#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];
#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
}