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crypto: fix PaX issue on NetBSD with CNv4 JIT

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moneromooo-monero 2019-03-07 16:40:48 +00:00
parent 89b1630e35
commit 7632dede7b
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GPG key ID: 686F07454D6CEFC3
2 changed files with 24 additions and 9 deletions
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13
src/crypto/CryptonightR_JIT.c
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@ -4,6 +4,9 @@
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#if !(defined(_MSC_VER) || defined(__MINGW32__))
#include <sys/mman.h>
#endif
#include "int-util.h"
#include "hash-ops.h"
@ -58,6 +61,11 @@ int v4_generate_JIT_code(const struct V4_Instruction* code, v4_random_math_JIT_f
uint8_t* JIT_code = (uint8_t*) buf;
const uint8_t* JIT_code_end = JIT_code + buf_size;
#if !(defined(_MSC_VER) || defined(__MINGW32__))
if (mprotect((void*)buf, buf_size, PROT_READ | PROT_WRITE))
return 1;
#endif
APPEND_CODE(prologue, sizeof(prologue));
uint32_t prev_rot_src = 0xFFFFFFFFU;
@ -101,6 +109,11 @@ int v4_generate_JIT_code(const struct V4_Instruction* code, v4_random_math_JIT_f
APPEND_CODE(epilogue, sizeof(epilogue));
#if !(defined(_MSC_VER) || defined(__MINGW32__))
if (mprotect((void*)buf, buf_size, PROT_READ | PROT_EXEC))
return 1;
#endif
__builtin___clear_cache((char*)buf, (char*)JIT_code);
return 0;

20
src/crypto/slow-hash.c
View file

@ -756,10 +756,10 @@ void slow_hash_allocate_state(void)
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || \
defined(__DragonFly__) || defined(__NetBSD__)
hp_state = mmap(0, MEMORY, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANON, 0, 0);
MAP_PRIVATE | MAP_ANON, -1, 0);
#else
hp_state = mmap(0, MEMORY, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, 0, 0);
MAP_PRIVATE | MAP_ANONYMOUS | MAP_HUGETLB, -1, 0);
#endif
if(hp_state == MAP_FAILED)
hp_state = NULL;
@ -778,11 +778,16 @@ void slow_hash_allocate_state(void)
#else
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || \
defined(__DragonFly__) || defined(__NetBSD__)
hp_jitfunc_memory = mmap(0, 4096 + 4095, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANON, 0, 0);
#ifdef __NetBSD__
#define RESERVED_FLAGS PROT_MPROTECT(PROT_EXEC)
#else
hp_jitfunc_memory = mmap(0, 4096 + 4095, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
#define RESERVED_FLAGS 0
#endif
hp_jitfunc_memory = mmap(0, 4096 + 4096, PROT_READ | PROT_WRITE | RESERVED_FLAGS,
MAP_PRIVATE | MAP_ANON, -1, 0);
#else
hp_jitfunc_memory = mmap(0, 4096 + 4096, PROT_READ | PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
#endif
if(hp_jitfunc_memory == MAP_FAILED)
hp_jitfunc_memory = NULL;
@ -794,9 +799,6 @@ void slow_hash_allocate_state(void)
hp_jitfunc_memory = malloc(4096 + 4095);
}
hp_jitfunc = (v4_random_math_JIT_func)((size_t)(hp_jitfunc_memory + 4095) & ~4095);
#if !(defined(_MSC_VER) || defined(__MINGW32__))
mprotect(hp_jitfunc, 4096, PROT_READ | PROT_WRITE | PROT_EXEC);
#endif
}
/**