lm32: add patch for kernel and elf2flt

1 files changed, 159 insertions, 0 deletions

diff --git a/toolchain/elf2flt/patches/6d80ab6c93409e796f85da404bde84b841231531/0001-lm32.patch b/toolchain/elf2flt/patches/6d80ab6c93409e796f85da404bde84b841231531/0001-lm32.patch
new file mode 100644
index 000000000..44757171b
--- /dev/null
+++ b/toolchain/elf2flt/patches/6d80ab6c93409e796f85da404bde84b841231531/0001-lm32.patch
@@ -0,0 +1,159 @@
+diff -Nur elf2flt-6d80ab6c93409e796f85da404bde84b841231531.orig/elf2flt.c elf2flt-6d80ab6c93409e796f85da404bde84b841231531/elf2flt.c
+--- elf2flt-6d80ab6c93409e796f85da404bde84b841231531.orig/elf2flt.c	2017-09-27 06:06:04.000000000 +0200
++++ elf2flt-6d80ab6c93409e796f85da404bde84b841231531/elf2flt.c	2017-09-27 06:07:51.032597579 +0200
+@@ -61,6 +61,8 @@
+ #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)
+@@ -120,6 +122,11 @@
+ #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"
+ #else
+@@ -357,7 +364,7 @@
+   int			bad_relocs = 0;
+   asymbol		**symb;
+   long			nsymb;
+-#ifdef TARGET_bfin
++#if defined (TARGET_bfin) || defined (TARGET_lm32)
+   unsigned long		persistent_data = 0;
+ #endif
+   
+@@ -682,6 +689,36 @@
+ 					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;
+@@ -1459,6 +1496,63 @@
+ #undef _30BITS_RELOC
+ #undef _28BITS_RELOC
+ #endif
++#ifdef TARGET_lm32
++				case R_LM32_32:
++				{
++					pflags = FLAT_LM32_RELOC_TYPE_32_BIT << 29;
++					sym_vma = bfd_section_vma(abs_bfd, 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 = bfd_section_vma(abs_bfd, 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 %d\n", (*p)->howto->type);
+@@ -1596,6 +1690,13 @@
+ 					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-6d80ab6c93409e796f85da404bde84b841231531.orig/elf2flt.ld.in elf2flt-6d80ab6c93409e796f85da404bde84b841231531/elf2flt.ld.in
+--- elf2flt-6d80ab6c93409e796f85da404bde84b841231531.orig/elf2flt.ld.in	2017-09-27 06:06:04.000000000 +0200
++++ elf2flt-6d80ab6c93409e796f85da404bde84b841231531/elf2flt.ld.in	2017-09-29 18:11:30.999698955 +0200
+@@ -34,6 +34,7 @@
+ 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.*)