121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
#include "oslib/host_context.h"
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#if defined(__ANDROID__)
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#include <asm/sigcontext.h>
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#else
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#if defined(__APPLE__)
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#define _XOPEN_SOURCE 1
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#define __USE_GNU 1
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#endif
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#if !defined(TARGET_NO_EXCEPTIONS)
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#include <ucontext.h>
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#endif
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#endif
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//////
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#define MCTX(p) (((ucontext_t *)(segfault_ctx))->uc_mcontext p)
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template <bool ToSegfault, typename Tctx, typename Tseg>
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static void bicopy(Tctx& ctx, Tseg& seg)
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{
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static_assert(sizeof(Tctx) == sizeof(Tseg), "Invalid assignment");
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if (ToSegfault)
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seg = (Tseg)ctx;
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else
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ctx = (Tctx)seg;
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}
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template<bool ToSegfault>
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static void context_segfault(host_context_t* hostctx, void* segfault_ctx)
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{
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#if !defined(TARGET_NO_EXCEPTIONS)
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#if HOST_CPU == CPU_ARM
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#if defined(__FreeBSD__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.__gregs[_REG_PC]));
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for (int i = 0; i < 15; i++)
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bicopy<ToSegfault>(hostctx->reg[i], MCTX(.__gregs[i]));
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#elif defined(__unix__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.arm_pc));
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u32* reg =(u32*) &MCTX(.arm_r0);
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for (int i = 0; i < 15; i++)
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bicopy<ToSegfault>(hostctx->reg[i], reg[i]);
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#elif defined(__APPLE__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(->__ss.__pc));
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for (int i = 0; i < 15; i++)
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bicopy<ToSegfault>(hostctx->reg[i], MCTX(->__ss.__r[i]));
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#else
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#error "Unsupported OS"
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#endif
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#elif HOST_CPU == CPU_ARM64
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#if defined(__APPLE__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(->__ss.__pc));
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bicopy<ToSegfault>(hostctx->x0, MCTX(->__ss.__x[0]));
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#else
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bicopy<ToSegfault>(hostctx->pc, MCTX(.pc));
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bicopy<ToSegfault>(hostctx->x0, MCTX(.regs[0]));
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#endif
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#elif HOST_CPU == CPU_X86
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#if defined(__FreeBSD__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.mc_eip));
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bicopy<ToSegfault>(hostctx->esp, MCTX(.mc_esp));
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bicopy<ToSegfault>(hostctx->eax, MCTX(.mc_eax));
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bicopy<ToSegfault>(hostctx->ecx, MCTX(.mc_ecx));
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#elif defined(__unix__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.gregs[REG_EIP]));
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bicopy<ToSegfault>(hostctx->esp, MCTX(.gregs[REG_ESP]));
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bicopy<ToSegfault>(hostctx->eax, MCTX(.gregs[REG_EAX]));
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bicopy<ToSegfault>(hostctx->ecx, MCTX(.gregs[REG_ECX]));
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#elif defined(__APPLE__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(->__ss.__eip));
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bicopy<ToSegfault>(hostctx->esp, MCTX(->__ss.__esp));
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bicopy<ToSegfault>(hostctx->eax, MCTX(->__ss.__eax));
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bicopy<ToSegfault>(hostctx->ecx, MCTX(->__ss.__ecx));
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#else
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#error "Unsupported OS"
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#endif
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#elif HOST_CPU == CPU_X64
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#if defined(__FreeBSD__) || defined(__DragonFly__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.mc_rip));
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#elif defined(__NetBSD__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.__gregs[_REG_RIP]));
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bicopy<ToSegfault>(hostctx->rsp, MCTX(.__gregs[REG_RSP]));
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bicopy<ToSegfault>(hostctx->r9, MCTX(.__gregs[REG_R9]));
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bicopy<ToSegfault>(hostctx->rdi, MCTX(.__gregs[REG_RDI]));
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#elif defined(__unix__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(.gregs[REG_RIP]));
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bicopy<ToSegfault>(hostctx->rsp, MCTX(.gregs[REG_RSP]));
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bicopy<ToSegfault>(hostctx->r9, MCTX(.gregs[REG_R9]));
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bicopy<ToSegfault>(hostctx->rdi, MCTX(.gregs[REG_RDI]));
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#elif defined(__APPLE__)
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bicopy<ToSegfault>(hostctx->pc, MCTX(->__ss.__rip));
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bicopy<ToSegfault>(hostctx->rsp, MCTX(->__ss.__rsp));
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bicopy<ToSegfault>(hostctx->r9, MCTX(->__ss.__r9));
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bicopy<ToSegfault>(hostctx->rdi, MCTX(->__ss.__rdi));
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#else
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#error "Unsupported OS"
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#endif
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#elif HOST_CPU == CPU_MIPS
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bicopy<ToSegfault>(hostctx->pc, MCTX(.pc));
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#elif HOST_CPU == CPU_GENERIC
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//nothing!
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#else
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#error Unsupported HOST_CPU
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#endif
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#endif
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}
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void context_from_segfault(host_context_t* hostctx, void* segfault_ctx) {
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context_segfault<false>(hostctx, segfault_ctx);
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}
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void context_to_segfault(host_context_t* hostctx, void* segfault_ctx) {
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context_segfault<true>(hostctx, segfault_ctx);
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}
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