openadk/toolchain/elf2flt/patches/26dfb54a59c8c0106418a0c46ccb4288d9e066fd/0002-lm32.patch

diff -Nur elf2flt.orig/elf2flt.c elf2flt/elf2flt.c
--- elf2flt.orig/elf2flt.c	2023-09-07 15:59:10.019349031 +0200
+++ elf2flt/elf2flt.c	2023-09-07 16:40:06.281961316 +0200
@@ -62,6 +62,8 @@
 #include <elf/bfin.h>
 #elif defined(TARGET_h8300)
 #include <elf/h8.h>
+#elif defined(TARGET_lm32)
+#include <elf/lm32.h>
 #elif defined(TARGET_m68k)
 #include <elf/m68k.h>
 #elif defined(TARGET_microblaze)
@@ -123,6 +125,11 @@
 #define ARCH	"nios"
 #elif defined(TARGET_nios2)
 #define ARCH	"nios2"
+#elif defined(TARGET_lm32)
+#define ARCH	"lm32"
+#define FLAT_LM32_RELOC_TYPE_32_BIT   0
+#define FLAT_LM32_RELOC_TYPE_HI16_BIT 1
+#define FLAT_LM32_RELOC_TYPE_LO16_BIT 2
 #elif defined(TARGET_xtensa)
 #define ARCH	"xtensa"
 #elif defined(TARGET_riscv64)
@@ -373,7 +380,7 @@
   int			bad_relocs = 0;
   asymbol		**symb;
   long			nsymb;
-#ifdef TARGET_bfin
+#if defined (TARGET_bfin) || defined (TARGET_lm32)
   unsigned long		persistent_data = 0;
 #endif
 
@@ -690,6 +697,36 @@
 					break;
 				default:
 					goto bad_resolved_reloc;
+#elif defined(TARGET_lm32)
+				case R_LM32_HI16:
+				case R_LM32_LO16:
+					if (q->howto->type == R_LM32_HI16) {
+						pflags = FLAT_LM32_RELOC_TYPE_HI16_BIT << 29;
+					} else {
+						pflags = FLAT_LM32_RELOC_TYPE_LO16_BIT << 29;
+					}
+
+					relocation_needed = 1;
+
+					/* remember the upper 16 bits */
+				    if ((0xffff0000 & sym_addr) != persistent_data) {
+						flat_relocs = (uint32_t *)
+							(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
+						if (verbose)
+							printf ("New persistent data for %08lx\n", sym_addr);
+						persistent_data = 0xffff0000 & sym_addr;
+						flat_relocs[flat_reloc_count++] = (sym_addr >> 16) | (3 << 29);
+					}
+					break;
+				case R_LM32_32:
+					pflags = FLAT_LM32_RELOC_TYPE_32_BIT << 29;
+					relocation_needed = 1;
+					break;
+				case R_LM32_CALL:
+					relocation_needed = 0;
+					break;
+				default:
+					goto bad_resolved_reloc;
 #elif defined(TARGET_m68k)
 				case R_68K_32:
 					goto good_32bit_resolved_reloc;
@@ -1478,6 +1515,63 @@
 #undef _30BITS_RELOC
 #undef _28BITS_RELOC
 #endif
+#ifdef TARGET_lm32
+				case R_LM32_32:
+				{
+					pflags = FLAT_LM32_RELOC_TYPE_32_BIT << 29;
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
+					sym_addr += sym_vma + q->addend;
+					relocation_needed = 1;
+					break;
+				}
+				case R_LM32_CALL:
+				{
+					sym_vma = 0;
+					sym_addr += sym_vma + q->addend;
+					sym_addr -= q->address;
+					sym_addr = (int32_t)sym_addr >> q->howto->rightshift;
+
+					if ((int32_t)sym_addr < -0x8000000 || (int32_t)sym_addr > 0x7ffffff) {
+						printf("ERROR: Relocation overflow for R_LM32_CALL relocation against %s\n", sym_name);
+						bad_relocs++;
+						continue;
+					}
+
+					r_mem[0] |= (sym_addr >> 24) & 0x03;
+					r_mem[1] = (sym_addr >> 16) & 0xff;
+					r_mem[2] = (sym_addr >> 8) & 0xff;
+					r_mem[3] = sym_addr & 0xff;
+					break;
+				}
+				case R_LM32_HI16:
+				case R_LM32_LO16:
+				{
+					if (q->howto->type == R_LM32_HI16) {
+						pflags = FLAT_LM32_RELOC_TYPE_HI16_BIT << 29;
+					} else {
+						pflags = FLAT_LM32_RELOC_TYPE_LO16_BIT << 29;
+					}
+
+					sym_vma = elf2flt_bfd_section_vma(sym_section);
+					sym_addr += sym_vma + q->addend;
+
+					relocation_needed = 1;
+
+					/* remember the upper 16 bits */
+				    if ((0xffff0000 & sym_addr) != persistent_data) {
+						flat_relocs = (uint32_t *)
+							(realloc (flat_relocs, (flat_reloc_count + 1) * sizeof (uint32_t)));
+						if (verbose)
+							printf ("New persistent data for %08lx\n", sym_addr);
+						persistent_data = 0xffff0000 & sym_addr;
+						flat_relocs[flat_reloc_count++] = (sym_addr >> 16) | (3 << 29);
+					}
+
+					r_mem[2] = (sym_addr >> 8) & 0xff;
+					r_mem[3] = sym_addr & 0xff;
+					break;
+				}
+#endif /* TARGET_lm32 */
 				default:
 					/* missing support for other types of relocs */
 					printf("ERROR: bad reloc type (%s)%d\n", q->howto->name, (*p)->howto->type);
@@ -1616,6 +1710,13 @@
 					break;
 #endif
 
+#ifdef TARGET_lm32
+				case R_LM32_HI16:
+				case R_LM32_LO16:
+				case R_LM32_CALL:
+					/* entry has already been written */
+					break;
+#endif
 				default:
 					/* The alignment of the build host
 					   might be stricter than that of the
diff -Nur elf2flt.orig/elf2flt.ld.in elf2flt/elf2flt.ld.in
--- elf2flt.orig/elf2flt.ld.in	2023-09-07 11:32:34.223463015 +0200
+++ elf2flt/elf2flt.ld.in	2023-09-07 16:06:02.781672190 +0200
@@ -73,6 +73,7 @@
 W_RODAT:	*(.rodata1)
 W_RODAT:	*(.rodata.*)
 W_RODAT:	*(.gnu.linkonce.r*)
+W_RODAT:	*(.rofixup)
 
 		/* .ARM.extab name sections containing exception unwinding information */
 		*(.ARM.extab* .gnu.linkonce.armextab.*)
@@ -111,6 +112,7 @@
 R_RODAT:	*(.rodata1)
 R_RODAT:	*(.rodata.*)
 R_RODAT:	*(.gnu.linkonce.r*)
+R_RODAT:	*(.rofixup)
 		*(.data)
 		*(.data1)
 		*(.data.*)