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Optimize API class a bit.

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This commit is contained in:
Andy Nguyen 2021-10-31 22:06:06 +01:00
parent 548af2ec1a
commit 49311ffaff
5 changed files with 104 additions and 78 deletions
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84
com/bdjb/API.java
View File

@ -48,8 +48,6 @@ public final class API {
private static final String VALUE_FIELD_NAME = "value"; private static final String VALUE_FIELD_NAME = "value";
private static final Long LONG_VALUE = new Long(1337);
private static API instance; private static API instance;
private UnsafeInterface unsafe; private UnsafeInterface unsafe;
@ -228,8 +226,8 @@ public final class API {
} }
private void buildContext( private void buildContext(
long contextData, long contextBuf,
long setJmpData, long setJmpBuf,
long rip, long rip,
long rdi, long rdi,
long rsi, long rsi,
@ -237,42 +235,48 @@ public final class API {
long rcx, long rcx,
long r8, long r8,
long r9) { long r9) {
long rbx = read64(setJmpData + 0x08); long rbx = read64(setJmpBuf + 0x08);
long rsp = read64(setJmpData + 0x10); long rsp = read64(setJmpBuf + 0x10);
long rbp = read64(setJmpData + 0x18); long rbp = read64(setJmpBuf + 0x18);
long r12 = read64(setJmpData + 0x20); long r12 = read64(setJmpBuf + 0x20);
long r13 = read64(setJmpData + 0x28); long r13 = read64(setJmpBuf + 0x28);
long r14 = read64(setJmpData + 0x30); long r14 = read64(setJmpBuf + 0x30);
long r15 = read64(setJmpData + 0x38); long r15 = read64(setJmpBuf + 0x38);
write64(contextData + 0x48, rdi); write64(contextBuf + 0x48, rdi);
write64(contextData + 0x50, rsi); write64(contextBuf + 0x50, rsi);
write64(contextData + 0x58, rdx); write64(contextBuf + 0x58, rdx);
write64(contextData + 0x60, rcx); write64(contextBuf + 0x60, rcx);
write64(contextData + 0x68, r8); write64(contextBuf + 0x68, r8);
write64(contextData + 0x70, r9); write64(contextBuf + 0x70, r9);
write64(contextData + 0x80, rbx); write64(contextBuf + 0x80, rbx);
write64(contextData + 0x88, rbp); write64(contextBuf + 0x88, rbp);
write64(contextData + 0xA0, r12); write64(contextBuf + 0xA0, r12);
write64(contextData + 0xA8, r13); write64(contextBuf + 0xA8, r13);
write64(contextData + 0xB0, r14); write64(contextBuf + 0xB0, r14);
write64(contextData + 0xB8, r15); write64(contextBuf + 0xB8, r15);
write64(contextData + 0xE0, rip); write64(contextBuf + 0xE0, rip);
write64(contextData + 0xF8, rsp); write64(contextBuf + 0xF8, rsp);
write64(contextData + 0x110, 0x41414141); write64(contextBuf + 0x110, 0x41414141);
write64(contextData + 0x118, 0x41414141); write64(contextBuf + 0x118, 0x41414141);
} }
public long call(long func, long arg0, long arg1, long arg2, long arg3, long arg4, long arg5) { public long call(long func, long arg0, long arg1, long arg2, long arg3, long arg4, long arg5) {
long fakeCallKlass = malloc(0x400); long fakeCallKlass = malloc(0x400);
long fakeCallKlassVtable = malloc(0x400);
if (fakeCallKlass == 0 || fakeCallKlassVtable == 0) {
throw new IllegalStateException("Could not allocate memory.");
}
memset(fakeCallKlass, 0, 0x400); memset(fakeCallKlass, 0, 0x400);
long fakeCallKlassVtable = malloc(0x400);
for (int i = 0; i < 0x400; i += 8) { for (int i = 0; i < 0x400; i += 8) {
write64(fakeCallKlassVtable + i, JVM_NativePath); write64(fakeCallKlassVtable + i, JVM_NativePath);
} }
try {
long ret = 0; long ret = 0;
if (jdk11) { if (jdk11) {
@ -284,6 +288,7 @@ public final class API {
write64(fakeCallKlass + 0x00, fakeCallKlassVtable); write64(fakeCallKlass + 0x00, fakeCallKlassVtable);
write64(callClass + 0x98, fakeCallKlass); write64(callClass + 0x98, fakeCallKlass);
multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS); multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS);
write64(callClass + 0x98, callKlass);
buildContext( buildContext(
fakeCallKlass + 0x00, fakeCallKlass + 0x00, func, arg0, arg1, arg2, arg3, arg4, arg5); fakeCallKlass + 0x00, fakeCallKlass + 0x00, func, arg0, arg1, arg2, arg3, arg4, arg5);
@ -293,7 +298,6 @@ public final class API {
write64(fakeCallKlass + 0x00, fakeCallKlassVtable); write64(fakeCallKlass + 0x00, fakeCallKlassVtable);
write64(callClass + 0x98, fakeCallKlass); write64(callClass + 0x98, fakeCallKlass);
ret = multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS); ret = multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS);
write64(callClass + 0x98, callKlass); write64(callClass + 0x98, callKlass);
} else { } else {
long callClass = addrof(Call.class); long callClass = addrof(Call.class);
@ -304,6 +308,7 @@ public final class API {
write64(fakeCallKlass + 0x20, fakeCallKlassVtable); write64(fakeCallKlass + 0x20, fakeCallKlassVtable);
write64(callClass + 0x68, fakeCallKlass); write64(callClass + 0x68, fakeCallKlass);
multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS); multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS);
write64(callClass + 0x68, callKlass);
buildContext( buildContext(
fakeCallKlass + 0x20, fakeCallKlass + 0x20, func, arg0, arg1, arg2, arg3, arg4, arg5); fakeCallKlass + 0x20, fakeCallKlass + 0x20, func, arg0, arg1, arg2, arg3, arg4, arg5);
@ -313,18 +318,18 @@ public final class API {
write64(fakeCallKlass + 0x20, fakeCallKlassVtable); write64(fakeCallKlass + 0x20, fakeCallKlassVtable);
write64(callClass + 0x68, fakeCallKlass); write64(callClass + 0x68, fakeCallKlass);
ret = multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS); ret = multiNewArray(Call.class, MULTI_NEW_ARRAY_DIMENSIONS);
write64(callClass + 0x68, callKlass); write64(callClass + 0x68, callKlass);
} }
free(fakeCallKlassVtable);
free(fakeCallKlass);
if (ret == 0) { if (ret == 0) {
return 0; return 0;
} }
return read64(ret); return read64(ret);
} finally {
free(fakeCallKlassVtable);
free(fakeCallKlass);
}
} }
public long call(long func, long arg0, long arg1, long arg2, long arg3, long arg4) { public long call(long func, long arg0, long arg1, long arg2, long arg3, long arg4) {
@ -379,8 +384,9 @@ public final class API {
} }
public long addrof(Object obj) { public long addrof(Object obj) {
unsafe.putObject(LONG_VALUE, longValueOffset, obj); Long longValue = new Long(1337);
return unsafe.getLong(LONG_VALUE, longValueOffset); unsafe.putObject(longValue, longValueOffset, obj);
return unsafe.getLong(longValue, longValueOffset);
} }
public byte read8(long addr) { public byte read8(long addr) {
@ -428,9 +434,7 @@ public final class API {
} }
public long memcpy(long dest, long src, long n) { public long memcpy(long dest, long src, long n) {
for (int i = 0; i < n; i++) { unsafe.copyMemory(src, dest, n);
write8(dest + i, read8(src + i));
}
return dest; return dest;
} }
@ -449,9 +453,7 @@ public final class API {
} }
public long memset(long s, int c, long n) { public long memset(long s, int c, long n) {
for (int i = 0; i < n; i++) { unsafe.setMemory(s, n, (byte) c);
write8(s + i, (byte) c);
}
return s; return s;
} }

4
com/bdjb/UnsafeInterface.java
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@ -37,4 +37,8 @@ interface UnsafeInterface {
public long reallocateMemory(long address, long bytes); public long reallocateMemory(long address, long bytes);
public void freeMemory(long address); public void freeMemory(long address);
public void setMemory(long address, long bytes, byte value);
public void copyMemory(long srcAddress, long destAddress, long bytes);
} }

8
com/bdjb/UnsafeJdkImpl.java
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@ -102,4 +102,12 @@ class UnsafeJdkImpl implements UnsafeInterface {
public void freeMemory(long address) { public void freeMemory(long address) {
unsafe.freeMemory(address); unsafe.freeMemory(address);
} }
public void setMemory(long address, long bytes, byte value) {
unsafe.setMemory(address, bytes, value);
}
public void copyMemory(long srcAddress, long destAddress, long bytes) {
unsafe.copyMemory(srcAddress, destAddress, bytes);
}
} }

8
com/bdjb/UnsafeSunImpl.java
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@ -81,4 +81,12 @@ class UnsafeSunImpl implements UnsafeInterface {
public void freeMemory(long address) { public void freeMemory(long address) {
unsafe.freeMemory(address); unsafe.freeMemory(address);
} }
public void setMemory(long address, long bytes, byte value) {
unsafe.setMemory(address, bytes, value);
}
public void copyMemory(long srcAddress, long destAddress, long bytes) {
unsafe.copyMemory(srcAddress, destAddress, bytes);
}
} }

4
jdk/internal/misc/Unsafe.java
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@ -46,4 +46,8 @@ public class Unsafe {
} }
public void freeMemory(long address) {} public void freeMemory(long address) {}
public void setMemory(long address, long bytes, byte value) {}
public void copyMemory(long srcAddress, long destAddress, long bytes) {}
} }