87 lines
2.2 KiB
C++
87 lines
2.2 KiB
C++
#include "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 HOST_OS == OS_DARWIN
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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 <typename Ta, typename Tb>
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void bicopy(Ta& rei, Tb& seg, bool to_segfault) {
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if (to_segfault) {
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seg = rei;
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}
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else {
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rei = seg;
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}
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}
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void context_segfault(rei_host_context_t* reictx, void* segfault_ctx, bool to_segfault) {
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#if !defined(TARGET_NO_EXCEPTIONS)
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#if HOST_CPU == CPU_ARM
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#if HOST_OS == OS_LINUX
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bicopy(reictx->pc, MCTX(.arm_pc), to_segfault);
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u32* r =(u32*) &MCTX(.arm_r0);
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for (int i = 0; i < 15; i++)
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bicopy(reictx->r[i], r[i], to_segfault);
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#elif HOST_OS == OS_DARWIN
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bicopy(reictx->pc, MCTX(->__ss.__pc), to_segfault);
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for (int i = 0; i < 15; i++)
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bicopy(reictx->r[i], MCTX(->__ss.__r[i]), to_segfault);
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#else
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#error HOST_OS
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#endif
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#elif HOST_CPU == CPU_X86
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#if HOST_OS == OS_LINUX
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bicopy(reictx->pc, MCTX(.gregs[REG_EIP]), to_segfault);
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bicopy(reictx->esp, MCTX(.gregs[REG_ESP]), to_segfault);
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bicopy(reictx->eax, MCTX(.gregs[REG_EAX]), to_segfault);
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bicopy(reictx->ecx, MCTX(.gregs[REG_ECX]), to_segfault);
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#elif HOST_OS == OS_DARWIN
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bicopy(reictx->pc, MCTX(->__ss.__eip), to_segfault);
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bicopy(reictx->esp, MCTX(->__ss.__esp), to_segfault);
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bicopy(reictx->eax, MCTX(->__ss.__eax), to_segfault);
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bicopy(reictx->ecx, MCTX(->__ss.__ecx), to_segfault);
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#else
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#error HOST_OS
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#endif
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#elif HOST_CPU == CPU_X64
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#if HOST_OS == OS_LINUX
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bicopy(reictx->pc, MCTX(.gregs[REG_RIP]), to_segfault);
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#elif HOST_OS == OS_DARWIN
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bicopy(reictx->pc, MCTX(->__ss.__rip), to_segfault);
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#endif
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#elif HOST_CPU == CPU_MIPS
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bicopy(reictx->pc, MCTX(.pc), to_segfault);
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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(rei_host_context_t* reictx, void* segfault_ctx) {
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context_segfault(reictx, segfault_ctx, false);
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}
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void context_to_segfault(rei_host_context_t* reictx, void* segfault_ctx) {
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context_segfault(reictx, segfault_ctx, true);
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}
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