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Update outdated comments and naming in jit.h/c

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fincs 2020-04-27 13:46:55 +02:00
parent dbc4b759e2
commit b0494c1acb
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2 changed files with 21 additions and 25 deletions
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12
nx/include/switch/kernel/jit.h
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@ -9,8 +9,8 @@
/// JIT implementation type.
typedef enum {
JitType_CodeMemory, ///< JIT supported using svcSetProcessMemoryPermission
JitType_JitMemory, ///< JIT supported using [4.0.0+] code-memory syscalls (this isn't usable on [5.0.0+] so JitType_CodeMemory is used instead).
JitType_SetProcessMemoryPermission, ///< JIT supported using svcSetProcessMemoryPermission
JitType_CodeMemory, ///< JIT supported using [4.0.0+] CodeMemory syscalls
} JitType;
/// JIT buffer object.
@ -58,11 +58,15 @@ Result jitClose(Jit* j);
* @param j JIT buffer.
* @return Pointer to alias of the JIT buffer that can be written to.
*/
void* jitGetRwAddr(Jit* j);
NX_CONSTEXPR void* jitGetRwAddr(Jit* j) {
return j->rw_addr;
}
/**
* @brief Gets the address of the executable memory alias of a JIT buffer.
* @param j JIT buffer.
* @return Pointer to alias of the JIT buffer that can be executed.
*/
void* jitGetRxAddr(Jit* j);
NX_CONSTEXPR void* jitGetRxAddr(Jit* j) {
return j->rx_addr;
}

34
nx/source/kernel/jit.c
View File

@ -13,16 +13,16 @@ Result jitCreate(Jit* j, size_t size)
{
JitType type;
// Use new jit primitive introduced in [4.0.0+], if available.
// Not usable with [5.0.0+] since svcMapJitMemory doesn't allow using that SVC under the same process which owns that object.
// Use new CodeMemory object introduced in [4.0.0+], if available.
// On [5.0.0+] this is only usable with a kernel patch, as svcControlCodeMemory now errors if it's used under the same process which owns the object.
if (kernelAbove400() && envIsSyscallHinted(0x4B) && envIsSyscallHinted(0x4C)
&& (!kernelAbove500() || detectJitKernelPatch())) {
type = JitType_JitMemory;
type = JitType_CodeMemory;
}
// Fall back to MapProcessCodeMemory if available.
// Fall back to JitType_SetProcessMemoryPermission if available.
else if (envIsSyscallHinted(0x73) && envIsSyscallHinted(0x77) && envIsSyscallHinted(0x78)
&& (envGetOwnProcessHandle() != INVALID_HANDLE)) {
type = JitType_CodeMemory;
type = JitType_SetProcessMemoryPermission;
}
else {
// Jit is unavailable. :(
@ -47,11 +47,11 @@ Result jitCreate(Jit* j, size_t size)
switch (j->type)
{
case JitType_CodeMemory:
case JitType_SetProcessMemoryPermission:
j->rw_addr = j->src_addr;
break;
case JitType_JitMemory:
case JitType_CodeMemory:
j->rw_addr = virtmemReserve(j->size);
rc = svcCreateCodeMemory(&j->handle, j->src_addr, j->size);
@ -95,11 +95,11 @@ Result jitTransitionToWritable(Jit* j)
Result rc = 0;
switch (j->type) {
case JitType_CodeMemory:
case JitType_SetProcessMemoryPermission:
if (j->is_executable) rc = svcUnmapProcessCodeMemory(envGetOwnProcessHandle(), (u64) j->rx_addr, (u64) j->src_addr, j->size);
break;
case JitType_JitMemory:
case JitType_CodeMemory:
// No need to do anything.
break;
}
@ -114,7 +114,7 @@ Result jitTransitionToExecutable(Jit* j)
Result rc = 0;
switch (j->type) {
case JitType_CodeMemory:
case JitType_SetProcessMemoryPermission:
if (!j->is_executable) {
rc = svcMapProcessCodeMemory(envGetOwnProcessHandle(), (u64) j->rx_addr, (u64) j->src_addr, j->size);
@ -128,7 +128,7 @@ Result jitTransitionToExecutable(Jit* j)
}
break;
case JitType_JitMemory:
case JitType_CodeMemory:
armDCacheFlush(j->rw_addr, j->size);
armICacheInvalidate(j->rx_addr, j->size);
break;
@ -145,7 +145,7 @@ Result jitClose(Jit* j)
switch (j->type)
{
case JitType_CodeMemory:
case JitType_SetProcessMemoryPermission:
rc = jitTransitionToWritable(j);
if (R_SUCCEEDED(rc)) {
@ -153,7 +153,7 @@ Result jitClose(Jit* j)
}
break;
case JitType_JitMemory:
case JitType_CodeMemory:
rc = svcControlCodeMemory(j->handle, CodeMapOperation_UnmapOwner, j->rw_addr, j->size, 0);
if (R_SUCCEEDED(rc)) {
@ -177,11 +177,3 @@ Result jitClose(Jit* j)
}
return rc;
}
void* jitGetRwAddr(Jit* j) {
return j->rw_addr;
}
void* jitGetRxAddr(Jit* j) {
return j->rx_addr;
}