Officially past the point of no return. C scripting works!

1 files changed, 0 insertions, 444 deletions

diff --git a/tinycc/arm-link.c b/tinycc/arm-link.c
deleted file mode 100644
index 242bb94..0000000
--- a/tinycc/arm-link.c
+++ /dev/null
@@ -1,444 +0,0 @@
-#ifdef TARGET_DEFS_ONLY
-
-#define EM_TCC_TARGET EM_ARM
-
-/* relocation type for 32 bit data relocation */
-#define R_DATA_32   R_ARM_ABS32
-#define R_DATA_PTR  R_ARM_ABS32
-#define R_JMP_SLOT  R_ARM_JUMP_SLOT
-#define R_GLOB_DAT  R_ARM_GLOB_DAT
-#define R_COPY      R_ARM_COPY
-#define R_RELATIVE  R_ARM_RELATIVE
-
-#define R_NUM       R_ARM_NUM
-
-#define ELF_START_ADDR 0x00010000
-#define ELF_PAGE_SIZE  0x10000
-
-#define PCRELATIVE_DLLPLT 1
-#define RELOCATE_DLLPLT 1
-
-enum float_abi {
-    ARM_SOFTFP_FLOAT,
-    ARM_HARD_FLOAT,
-};
-
-#else /* !TARGET_DEFS_ONLY */
-
-#include "tcc.h"
-
-#ifdef NEED_RELOC_TYPE
-/* 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_ARM_MOVT_ABS:
-	case R_ARM_MOVW_ABS_NC:
-	case R_ARM_THM_MOVT_ABS:
-	case R_ARM_THM_MOVW_ABS_NC:
-	case R_ARM_ABS32:
-	case R_ARM_REL32:
-	case R_ARM_GOTPC:
-	case R_ARM_GOTOFF:
-	case R_ARM_GOT32:
-	case R_ARM_GOT_PREL:
-	case R_ARM_COPY:
-	case R_ARM_GLOB_DAT:
-	case R_ARM_NONE:
-	case R_ARM_TARGET1:
-	case R_ARM_MOVT_PREL:
-	case R_ARM_MOVW_PREL_NC:
-            return 0;
-
-        case R_ARM_PC24:
-        case R_ARM_CALL:
-	case R_ARM_JUMP24:
-	case R_ARM_PLT32:
-	case R_ARM_THM_PC22:
-	case R_ARM_THM_JUMP24:
-	case R_ARM_PREL31:
-	case R_ARM_V4BX:
-	case R_ARM_JUMP_SLOT:
-            return 1;
-    }
-    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_ARM_NONE:
-	case R_ARM_COPY:
-	case R_ARM_GLOB_DAT:
-	case R_ARM_JUMP_SLOT:
-            return NO_GOTPLT_ENTRY;
-
-        case R_ARM_PC24:
-        case R_ARM_CALL:
-	case R_ARM_JUMP24:
-	case R_ARM_PLT32:
-	case R_ARM_THM_PC22:
-	case R_ARM_THM_JUMP24:
-	case R_ARM_MOVT_ABS:
-	case R_ARM_MOVW_ABS_NC:
-	case R_ARM_THM_MOVT_ABS:
-	case R_ARM_THM_MOVW_ABS_NC:
-	case R_ARM_PREL31:
-	case R_ARM_ABS32:
-	case R_ARM_REL32:
-	case R_ARM_V4BX:
-	case R_ARM_TARGET1:
-	case R_ARM_MOVT_PREL:
-	case R_ARM_MOVW_PREL_NC:
-            return AUTO_GOTPLT_ENTRY;
-
-	case R_ARM_GOTPC:
-	case R_ARM_GOTOFF:
-            return BUILD_GOT_ONLY;
-
-	case R_ARM_GOT32:
-	case R_ARM_GOT_PREL:
-            return ALWAYS_GOTPLT_ENTRY;
-    }
-    return -1;
-}
-
-#ifdef NEED_BUILD_GOT
-ST_FUNC unsigned create_plt_entry(TCCState *s1, unsigned got_offset, struct sym_attr *attr)
-{
-    Section *plt = s1->plt;
-    uint8_t *p;
-    unsigned plt_offset;
-
-    /* when building a DLL, GOT entry accesses must be done relative to
-       start of GOT (see x86_64 example above)  */
-
-    /* empty PLT: create PLT0 entry that push address of call site and
-       jump to ld.so resolution routine (GOT + 8) */
-    if (plt->data_offset == 0) {
-        p = section_ptr_add(plt, 20);
-        write32le(p,    0xe52de004); /* push {lr}         */
-        write32le(p+4,  0xe59fe004); /* ldr lr, [pc, #4] */
-        write32le(p+8,  0xe08fe00e); /* add lr, pc, lr    */
-        write32le(p+12, 0xe5bef008); /* ldr pc, [lr, #8]! */
-        /* p+16 is set in relocate_plt */
-    }
-    plt_offset = plt->data_offset;
-
-    if (attr->plt_thumb_stub) {
-        p = section_ptr_add(plt, 4);
-        write32le(p,   0x4778); /* bx pc */
-        write32le(p+2, 0x46c0); /* nop   */
-    }
-    p = section_ptr_add(plt, 16);
-    /* save GOT offset for relocate_plt */
-    write32le(p + 4, got_offset);
-    return plt_offset;
-}
-
-/* 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) {
-        int x = s1->got->sh_addr - s1->plt->sh_addr - 12;
-        write32le(s1->plt->data + 16, x - 4);
-        p += 20;
-        while (p < p_end) {
-	    unsigned off = x  + read32le(p + 4) + (s1->plt->data - p) + 4;
-            if (read32le(p) == 0x46c04778) /* PLT Thumb stub present */
-                p += 4;
-            write32le(p, 0xe28fc200 | ((off >> 28) & 0xf));      // add ip, pc, #0xN0000000
-            write32le(p + 4, 0xe28cc600 | ((off >> 20) & 0xff)); // add ip, pc, #0xNN00000
-            write32le(p + 8, 0xe28cca00 | ((off >> 12) & 0xff)); // add ip, ip, #0xNN000
-            write32le(p + 12, 0xe5bcf000 | (off & 0xfff));	 // ldr pc, [ip, #0xNNN]!
-            p += 16;
-        }
-    }
-
-    if (s1->plt->reloc) {
-        ElfW_Rel *rel;
-        p = s1->got->data;
-        for_each_elem(s1->plt->reloc, 0, rel, ElfW_Rel) {
-            write32le(p + rel->r_offset, s1->plt->sh_addr);
-	}
-    }
-}
-#endif
-#endif
-
-void relocate(TCCState *s1, ElfW_Rel *rel, int type, unsigned char *ptr, addr_t addr, addr_t val)
-{
-    ElfW(Sym) *sym;
-    int sym_index, esym_index;
-
-    sym_index = ELFW(R_SYM)(rel->r_info);
-    sym = &((ElfW(Sym) *)symtab_section->data)[sym_index];
-
-    switch(type) {
-        case R_ARM_PC24:
-        case R_ARM_CALL:
-        case R_ARM_JUMP24:
-        case R_ARM_PLT32:
-            {
-                int x, is_thumb, is_call, h, blx_avail, is_bl, th_ko;
-                x = (*(int *) ptr) & 0xffffff;
-#ifdef DEBUG_RELOC
-		printf ("reloc %d: x=0x%x val=0x%x ", type, x, val);
-#endif
-                (*(int *)ptr) &= 0xff000000;
-                if (x & 0x800000)
-                    x -= 0x1000000;
-                x <<= 2;
-                blx_avail = (TCC_CPU_VERSION >= 5);
-                is_thumb = val & 1;
-                is_bl = (*(unsigned *) ptr) >> 24 == 0xeb;
-                is_call = (type == R_ARM_CALL || (type == R_ARM_PC24 && is_bl));
-                x += val - addr;
-#ifdef DEBUG_RELOC
-		printf (" newx=0x%x name=%s\n", x,
-			(char *) symtab_section->link->data + sym->st_name);
-#endif
-                h = x & 2;
-                th_ko = (x & 3) && (!blx_avail || !is_call);
-                if (th_ko || x >= 0x2000000 || x < -0x2000000)
-                    tcc_error_noabort("can't relocate value at %x,%d",addr, type);
-                x >>= 2;
-                x &= 0xffffff;
-                /* Only reached if blx is avail and it is a call */
-                if (is_thumb) {
-                    x |= h << 24;
-                    (*(int *)ptr) = 0xfa << 24; /* bl -> blx */
-                }
-                (*(int *) ptr) |= x;
-            }
-            return;
-        /* Since these relocations only concern Thumb-2 and blx instruction was
-           introduced before Thumb-2, we can assume blx is available and not
-           guard its use */
-        case R_ARM_THM_PC22:
-        case R_ARM_THM_JUMP24:
-            {
-                int x, hi, lo, s, j1, j2, i1, i2, imm10, imm11;
-                int to_thumb, is_call, to_plt, blx_bit = 1 << 12;
-                Section *plt;
-
-                /* weak reference */
-                if (sym->st_shndx == SHN_UNDEF &&
-                    ELFW(ST_BIND)(sym->st_info) == STB_WEAK)
-                    return;
-
-                /* Get initial offset */
-                hi = (*(uint16_t *)ptr);
-                lo = (*(uint16_t *)(ptr+2));
-                s = (hi >> 10) & 1;
-                j1 = (lo >> 13) & 1;
-                j2 = (lo >> 11) & 1;
-                i1 = (j1 ^ s) ^ 1;
-                i2 = (j2 ^ s) ^ 1;
-                imm10 = hi & 0x3ff;
-                imm11 = lo & 0x7ff;
-                x = (s << 24) | (i1 << 23) | (i2 << 22) |
-                    (imm10 << 12) | (imm11 << 1);
-                if (x & 0x01000000)
-                    x -= 0x02000000;
-
-                /* Relocation infos */
-                to_thumb = val & 1;
-                plt = s1->plt;
-                to_plt = (val >= plt->sh_addr) &&
-                         (val < plt->sh_addr + plt->data_offset);
-                is_call = (type == R_ARM_THM_PC22);
-
-                if (!to_thumb && !to_plt && !is_call) {
-                    int index;
-                    uint8_t *p;
-                    char *name, buf[1024];
-                    Section *text;
-
-                    name = (char *) symtab_section->link->data + sym->st_name;
-                    text = s1->sections[sym->st_shndx];
-                    /* Modify reloc to target a thumb stub to switch to ARM */
-                    snprintf(buf, sizeof(buf), "%s_from_thumb", name);
-                    index = put_elf_sym(symtab_section,
-                                        text->data_offset + 1,
-                                        sym->st_size, sym->st_info, 0,
-                                        sym->st_shndx, buf);
-                    to_thumb = 1;
-                    val = text->data_offset + 1;
-                    rel->r_info = ELFW(R_INFO)(index, type);
-                    /* Create a thumb stub function to switch to ARM mode */
-                    put_elf_reloc(symtab_section, text,
-                                  text->data_offset + 4, R_ARM_JUMP24,
-                                  sym_index);
-                    p = section_ptr_add(text, 8);
-                    write32le(p,   0x4778); /* bx pc */
-                    write32le(p+2, 0x46c0); /* nop   */
-                    write32le(p+4, 0xeafffffe); /* b $sym */
-                }
-
-                /* Compute final offset */
-                x += val - addr;
-                if (!to_thumb && is_call) {
-                    blx_bit = 0; /* bl -> blx */
-                    x = (x + 3) & -4; /* Compute offset from aligned PC */
-                }
-
-                /* Check that relocation is possible
-                   * offset must not be out of range
-                   * if target is to be entered in arm mode:
-                     - bit 1 must not set
-                     - instruction must be a call (bl) or a jump to PLT */
-                if (!to_thumb || x >= 0x1000000 || x < -0x1000000)
-                    if (to_thumb || (val & 2) || (!is_call && !to_plt))
-                        tcc_error_noabort("can't relocate value at %x,%d",addr, type);
-
-                /* Compute and store final offset */
-                s = (x >> 24) & 1;
-                i1 = (x >> 23) & 1;
-                i2 = (x >> 22) & 1;
-                j1 = s ^ (i1 ^ 1);
-                j2 = s ^ (i2 ^ 1);
-                imm10 = (x >> 12) & 0x3ff;
-                imm11 = (x >> 1) & 0x7ff;
-                (*(uint16_t *)ptr) = (uint16_t) ((hi & 0xf800) |
-                                     (s << 10) | imm10);
-                (*(uint16_t *)(ptr+2)) = (uint16_t) ((lo & 0xc000) |
-                                (j1 << 13) | blx_bit | (j2 << 11) |
-                                imm11);
-            }
-            return;
-        case R_ARM_MOVT_ABS:
-        case R_ARM_MOVW_ABS_NC:
-            {
-                int x, imm4, imm12;
-                if (type == R_ARM_MOVT_ABS)
-                    val >>= 16;
-                imm12 = val & 0xfff;
-                imm4 = (val >> 12) & 0xf;
-                x = (imm4 << 16) | imm12;
-                if (type == R_ARM_THM_MOVT_ABS)
-                    *(int *)ptr |= x;
-                else
-                    *(int *)ptr += x;
-            }
-            return;
-        case R_ARM_MOVT_PREL:
-        case R_ARM_MOVW_PREL_NC:
-            {
-		int insn = *(int *)ptr;
-                int addend = ((insn >> 4) & 0xf000) | (insn & 0xfff);
-
-		addend = (addend ^ 0x8000) - 0x8000;
-		val += addend - addr;
-		if (type == R_ARM_MOVT_PREL)
-		    val >>= 16;
-		*(int *)ptr = (insn & 0xfff0f000) |
-			      ((val & 0xf000) << 4) | (val & 0xfff);
-            }
-            return;
-        case R_ARM_THM_MOVT_ABS:
-        case R_ARM_THM_MOVW_ABS_NC:
-            {
-                int x, i, imm4, imm3, imm8;
-                if (type == R_ARM_THM_MOVT_ABS)
-                    val >>= 16;
-                imm8 = val & 0xff;
-                imm3 = (val >> 8) & 0x7;
-                i = (val >> 11) & 1;
-                imm4 = (val >> 12) & 0xf;
-                x = (imm3 << 28) | (imm8 << 16) | (i << 10) | imm4;
-                if (type == R_ARM_THM_MOVT_ABS)
-                    *(int *)ptr |= x;
-                else
-                    *(int *)ptr += x;
-            }
-            return;
-        case R_ARM_PREL31:
-            {
-                int x;
-                x = (*(int *)ptr) & 0x7fffffff;
-                (*(int *)ptr) &= 0x80000000;
-                x = (x * 2) / 2;
-                x += val - addr;
-                if((x^(x>>1))&0x40000000)
-                    tcc_error_noabort("can't relocate value at %x,%d",addr, type);
-                (*(int *)ptr) |= x & 0x7fffffff;
-            }
-            return;
-        case R_ARM_ABS32:
-        case R_ARM_TARGET1:
-            if (s1->output_type & TCC_OUTPUT_DYN) {
-                esym_index = get_sym_attr(s1, sym_index, 0)->dyn_index;
-                qrel->r_offset = rel->r_offset;
-                if (esym_index) {
-                    qrel->r_info = ELFW(R_INFO)(esym_index, R_ARM_ABS32);
-                    qrel++;
-                    return;
-                } else {
-                    qrel->r_info = ELFW(R_INFO)(0, R_ARM_RELATIVE);
-                    qrel++;
-                }
-            }
-            *(int *)ptr += val;
-            return;
-        case R_ARM_REL32:
-            *(int *)ptr += val - addr;
-            return;
-        case R_ARM_GOTPC:
-            *(int *)ptr += s1->got->sh_addr - addr;
-            return;
-        case R_ARM_GOTOFF:
-            *(int *)ptr += val - s1->got->sh_addr;
-            return;
-        case R_ARM_GOT32:
-            /* we load the got offset */
-            *(int *)ptr += get_sym_attr(s1, sym_index, 0)->got_offset;
-            return;
-	case R_ARM_GOT_PREL:
-            /* we load the pc relative got offset */
-            *(int *)ptr += s1->got->sh_addr +
-			   get_sym_attr(s1, sym_index, 0)->got_offset -
-			   addr;
-            return;
-        case R_ARM_COPY:
-            return;
-        case R_ARM_V4BX:
-            /* trade Thumb support for ARMv4 support */
-            if ((0x0ffffff0 & *(int*)ptr) == 0x012FFF10)
-                *(int*)ptr ^= 0xE12FFF10 ^ 0xE1A0F000; /* BX Rm -> MOV PC, Rm */
-            return;
-        case R_ARM_GLOB_DAT:
-        case R_ARM_JUMP_SLOT:
-            *(addr_t *)ptr = val;
-            return;
-        case R_ARM_NONE:
-            /* Nothing to do.  Normally used to indicate a dependency
-               on a certain symbol (like for exception handling under EABI).  */
-            return;
-        case R_ARM_RELATIVE:
-#ifdef TCC_TARGET_PE
-            add32le(ptr, val - s1->pe_imagebase);
-#endif
-            /* do nothing */
-            return;
-        default:
-            fprintf(stderr,"FIXME: handle reloc type %d at %x [%p] to %x\n",
-                type, (unsigned)addr, ptr, (unsigned)val);
-            return;
-    }
-}
-
-#endif /* !TARGET_DEFS_ONLY */