Fix incorrect instructions names in ARM32 scanners (#124)

* Fix incorrect instructions names in ARM32 scanners

For unknown reasons some of the NEON instructions has been updated
in the PIE arm and thumb definitions without reflecting those
changes in the aarch32 scanners. As a result MAMBO does not compile
for 32-bit architectures. This commit adjusts the names in the
scanner to match defintions in PIE.wq

* Reduce size of RESERVED_BRK_SPACE for A32

For unknown reasons when RESERVED_BRK_SPACE is set to 128 * PAGE_SIZE
MABMO segfaults on scanning the first instructions. The problem
first transpires after mmap and remmap involving RESERVED_BRK_SPACE
is executed. This fix reduces the reserved space back to PAGE_SIZE
for A32 - the value used before RISC-V merge. One of the possible
explnations is smaller virtual memory on A32 compared to A64 and RISC-V.

arch/aarch32/scanner_a32.c

@@ -1804,8 +1804,8 @@ size_t scan_a32(dbm_thread *thread_data, uint32_t *read_address, int basic_block
       case ARM_NEON_VRSHR:
       case ARM_NEON_VRSHRN:
       case ARM_NEON_VRSRA:
-      case ARM_NEON_VSDOT_EL:
-      case ARM_NEON_VSDOT_VEC:
+      case ARM_NEON_VSDOT_SCAL:
+      case ARM_NEON_VSDOT:
       case ARM_NEON_VSHL:
       case ARM_NEON_VSHLI:
       case ARM_NEON_VSHLL:
@@ -1818,14 +1818,14 @@ size_t scan_a32(dbm_thread *thread_data, uint32_t *read_address, int basic_block
       case ARM_NEON_VSUB_I:
       case ARM_NEON_VSUBL:
       case ARM_NEON_VSUBW:
-      case ARM_NEON_VSUDOT_EL:
+      case ARM_NEON_VSUDOT:
       case ARM_NEON_VSWP:
       case ARM_NEON_VTRN:
       case ARM_NEON_VTST:
-      case ARM_NEON_VUDOT_EL:
-      case ARM_NEON_VUDOT_VEC:
-      case ARM_NEON_VUSDOT_EL:
-      case ARM_NEON_VUSDOT_VEC:
+      case ARM_NEON_VUDOT_SCAL:
+      case ARM_NEON_VUDOT:
+      case ARM_NEON_VUSDOT_SCAL:
+      case ARM_NEON_VUSDOT:
       case ARM_NEON_VUZP:
       case ARM_NEON_VZIP:
       case ARM_VFP_VABS:
@@ -1839,19 +1839,19 @@ size_t scan_a32(dbm_thread *thread_data, uint32_t *read_address, int basic_block
       case ARM_VFP_VCVT_F_I:
       case ARM_VFP_VDIV:
       case ARM_VFP_VFMA:
-      case ARM_VFP_VFMAL_EL:
-      case ARM_VFP_VFMAL_VEC:
+      case ARM_NEON_VFMAL_SCAL:
+      case ARM_NEON_VFMAL:
       case ARM_VFP_VFMS:
-      case ARM_VFP_VFMSL_EL:
-      case ARM_VFP_VFMSL_VEC:
+      case ARM_NEON_VFMSL_SCAL:
+      case ARM_NEON_VFMSL:
       case ARM_VFP_VFNMS:
-      case ARM_VFP_VINS_HP:
+      case ARM_VFP_VINS:
       case ARM_VFP_VMLA_F:
       case ARM_VFP_VMLS_F:
       case ARM_VFP_VMOV:
       case ARM_VFP_VMOV_HP:
       case ARM_VFP_VMOVI:
-      case ARM_VFP_VMOVX_HP:
+      case ARM_VFP_VMOVX:
       case ARM_VFP_VMRS:
       case ARM_VFP_VMUL_F:
       case ARM_VFP_VNEG:

arch/aarch32/scanner_t32.c

@@ -3059,8 +3059,8 @@ size_t scan_t32(dbm_thread *thread_data, uint16_t *read_address, int basic_block
       case THUMB_NEON_VRHADD:
       case THUMB_NEON_VRSHR:
       case THUMB_NEON_VRSHRN:
-      case THUMB_NEON_VSDOT_EL:
-      case THUMB_NEON_VSDOT_VEC:
+      case THUMB_NEON_VSDOT_SCAL:
+      case THUMB_NEON_VSDOT:
       case THUMB_NEON_VSHL:
       case THUMB_NEON_VSHLI:
       case THUMB_NEON_VSHLL:
@@ -3070,14 +3070,14 @@ size_t scan_t32(dbm_thread *thread_data, uint16_t *read_address, int basic_block
       case THUMB_NEON_VSUB_I:
       case THUMB_NEON_VSUBL:
       case THUMB_NEON_VSUBW:
-      case THUMB_NEON_VSUDOT_EL:
+      case THUMB_NEON_VSUDOT:
       case THUMB_NEON_VSWP:
       case THUMB_NEON_VTRN:
       case THUMB_NEON_VTST:
-      case THUMB_NEON_VUDOT_EL:
-      case THUMB_NEON_VUDOT_VEC:
-      case THUMB_NEON_VUSDOT_EL:
-      case THUMB_NEON_VUSDOT_VEC:
+      case THUMB_NEON_VUDOT_SCAL:
+      case THUMB_NEON_VUDOT:
+      case THUMB_NEON_VUSDOT_SCAL:
+      case THUMB_NEON_VUSDOT:
       case THUMB_VFP_VABS:
       case THUMB_VFP_VADD:
       case THUMB_VFP_VCMP:
@@ -3088,17 +3088,17 @@ size_t scan_t32(dbm_thread *thread_data, uint16_t *read_address, int basic_block
       case THUMB_VFP_VCVT_F_FP:
       case THUMB_VFP_VCVT_F_I:
       case THUMB_VFP_VDIV:
-      case THUMB_VFP_VFMAL_EL:
-      case THUMB_VFP_VFMAL_VEC:
-      case THUMB_VFP_VFMSL_EL:
-      case THUMB_VFP_VFMSL_VEC:
-      case THUMB_VFP_VINS_HP:
+      case THUMB_NEON_VFMAL_SCAL:
+      case THUMB_NEON_VFMAL:
+      case THUMB_NEON_VFMSL_SCAL:
+      case THUMB_NEON_VFMSL:
+      case THUMB_VFP_VINS:
       case THUMB_VFP_VMLA_F:
       case THUMB_VFP_VMLS_F:
       case THUMB_VFP_VMOV:
       case THUMB_VFP_VMOV_HP:
       case THUMB_VFP_VMOVI:
-      case THUMB_VFP_VMOVX_HP:
+      case THUMB_VFP_VMOVX:
       case THUMB_VFP_VMRS: // rt=0xF is CPSR
       case THUMB_VFP_VMUL:
       case THUMB_VFP_VNEG:

dbm.h

@@ -69,7 +69,11 @@
 #define MAX_CC_LINKS 100000
 
 // The size of the initial data segment allocation for brk emulation
-#define RESERVED_BRK_SPACE (128*(PAGE_SIZE))
+#ifdef __arm__
+  #define RESERVED_BRK_SPACE (PAGE_SIZE)
+#else
+  #define RESERVED_BRK_SPACE (128*(PAGE_SIZE))
+#endif
 
 #if defined __arm__ || __aarch64__ 
 #define THUMB 0x1