TinyC upgrade (#6593)

1 files changed, 131 insertions, 0 deletions

diff --git a/tinyc/c67-link.c b/tinyc/c67-link.c
new file mode 100644
index 000000000..de72e442f
--- /dev/null
+++ b/tinyc/c67-link.c
@@ -0,0 +1,131 @@
+#ifdef TARGET_DEFS_ONLY
+
+#define EM_TCC_TARGET EM_C60
+
+/* relocation type for 32 bit data relocation */
+#define R_DATA_32   R_C60_32
+#define R_DATA_PTR  R_C60_32
+#define R_JMP_SLOT  R_C60_JMP_SLOT
+#define R_GLOB_DAT  R_C60_GLOB_DAT
+#define R_COPY      R_C60_COPY
+#define R_RELATIVE  R_C60_RELATIVE
+
+#define R_NUM       R_C60_NUM
+
+#define ELF_START_ADDR 0x00000400
+#define ELF_PAGE_SIZE  0x1000
+
+#define PCRELATIVE_DLLPLT 0
+#define RELOCATE_DLLPLT 0
+
+#else /* !TARGET_DEFS_ONLY */
+
+#include "tcc.h"
+
+/* Returns 1 for a code relocation, 0 for a data relocation. For unknown
+   relocations, returns -1. */
+int code_reloc (int reloc_type)
+{
+    switch (reloc_type) {
+        case R_C60_32:
+	case R_C60LO16:
+	case R_C60HI16:
+        case R_C60_GOT32:
+        case R_C60_GOTOFF:
+        case R_C60_GOTPC:
+        case R_C60_COPY:
+            return 0;
+
+        case R_C60_PLT32:
+            return 1;
+    }
+
+    tcc_error ("Unknown relocation type: %d", reloc_type);
+    return -1;
+}
+
+/* Returns an enumerator to describe whether and when the relocation needs a
+   GOT and/or PLT entry to be created. See tcc.h for a description of the
+   different values. */
+int gotplt_entry_type (int reloc_type)
+{
+    switch (reloc_type) {
+        case R_C60_32:
+	case R_C60LO16:
+	case R_C60HI16:
+        case R_C60_COPY:
+            return NO_GOTPLT_ENTRY;
+
+        case R_C60_GOTOFF:
+        case R_C60_GOTPC:
+            return BUILD_GOT_ONLY;
+
+        case R_C60_PLT32:
+        case R_C60_GOT32:
+            return ALWAYS_GOTPLT_ENTRY;
+    }
+
+    tcc_error ("Unknown relocation type: %d", reloc_type);
+    return -1;
+}
+
+ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr)
+{
+    tcc_error("C67 got not implemented");
+    return 0;
+}
+
+/* relocate the PLT: compute addresses and offsets in the PLT now that final
+   address for PLT and GOT are known (see fill_program_header) */
+ST_FUNC void relocate_plt(TCCState *s1)
+{
+    uint8_t *p, *p_end;
+
+    if (!s1->plt)
+      return;
+
+    p = s1->plt->data;
+    p_end = p + s1->plt->data_offset;
+
+    if (p < p_end) {
+        /* XXX: TODO */
+        while (p < p_end) {
+            /* XXX: TODO */
+        }
+   }
+}
+
+void relocate_init(Section *sr) {}
+
+void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val)
+{
+    switch(type) {
+        case R_C60_32:
+            *(int *)ptr += val;
+            break;
+        case R_C60LO16:
+            {
+                uint32_t orig;
+
+                /* put the low 16 bits of the absolute address add to what is
+                   already there */
+                orig  =   ((*(int *)(ptr  )) >> 7) & 0xffff;
+                orig |=  (((*(int *)(ptr+4)) >> 7) & 0xffff) << 16;
+
+                /* patch both at once - assumes always in pairs Low - High */
+                *(int *) ptr    = (*(int *) ptr    & (~(0xffff << 7)) ) |
+                                   (((val+orig)      & 0xffff) << 7);
+                *(int *)(ptr+4) = (*(int *)(ptr+4) & (~(0xffff << 7)) ) |
+                                  ((((val+orig)>>16) & 0xffff) << 7);
+            }
+            break;
+        case R_C60HI16:
+            break;
+        default:
+            fprintf(stderr,"FIXME: handle reloc type %x at %x [%p] to %x\n",
+                    type, (unsigned) addr, ptr, (unsigned) val);
+            break;
+    }
+}
+
+#endif /* !TARGET_DEFS_ONLY */