#define elf_check_arch(x) ((x) == EM_SPARCV9)
#define ELF_USES_RELOCA
+#elif defined(HOST_ARM)
+
+#define ELF_CLASS ELFCLASS32
+#define ELF_ARCH EM_ARM
+#define elf_check_arch(x) ((x) == EM_ARM)
+#define ELF_USES_RELOC
+
#else
#error unsupported CPU - please update the code
#endif
return 1;
}
+#ifdef HOST_ARM
+
+int arm_emit_ldr_info(const char *name, unsigned long start_offset,
+ FILE *outfile, uint8_t *p_start, uint8_t *p_end,
+ ELF_RELOC *relocs, int nb_relocs)
+{
+ uint8_t *p;
+ uint32_t insn;
+ int offset, min_offset, pc_offset, data_size;
+ uint8_t data_allocated[1024];
+ unsigned int data_index;
+
+ memset(data_allocated, 0, sizeof(data_allocated));
+
+ p = p_start;
+ min_offset = p_end - p_start;
+ while (p < p_start + min_offset) {
+ insn = get32((uint32_t *)p);
+ if ((insn & 0x0d5f0000) == 0x051f0000) {
+ /* ldr reg, [pc, #im] */
+ offset = insn & 0xfff;
+ if (!(insn & 0x00800000))
+ offset = -offset;
+ if ((offset & 3) !=0)
+ error("%s:%04x: ldr pc offset must be 32 bit aligned",
+ name, start_offset + p - p_start);
+ pc_offset = p - p_start + offset + 8;
+ if (pc_offset <= (p - p_start) ||
+ pc_offset >= (p_end - p_start))
+ error("%s:%04x: ldr pc offset must point inside the function code",
+ name, start_offset + p - p_start);
+ if (pc_offset < min_offset)
+ min_offset = pc_offset;
+ if (outfile) {
+ /* ldr position */
+ fprintf(outfile, " arm_ldr_ptr->ptr = gen_code_ptr + %d;\n",
+ p - p_start);
+ /* ldr data index */
+ data_index = ((p_end - p_start) - pc_offset - 4) >> 2;
+ fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr + %d;\n",
+ data_index);
+ fprintf(outfile, " arm_ldr_ptr++;\n");
+ if (data_index >= sizeof(data_allocated))
+ error("%s: too many data", name);
+ if (!data_allocated[data_index]) {
+ ELF_RELOC *rel;
+ int i, addend, type;
+ const char *sym_name, *p;
+ char relname[1024];
+
+ data_allocated[data_index] = 1;
+
+ /* data value */
+ addend = get32((uint32_t *)(p_start + pc_offset));
+ relname[0] = '\0';
+ for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ if (rel->r_offset == (pc_offset + start_offset)) {
+ sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+ /* the compiler leave some unnecessary references to the code */
+ if (strstart(sym_name, "__op_param", &p)) {
+ snprintf(relname, sizeof(relname), "param%s", p);
+ } else {
+ snprintf(relname, sizeof(relname), "(long)(&%s)", sym_name);
+ }
+ type = ELF32_R_TYPE(rel->r_info);
+ if (type != R_ARM_ABS32)
+ error("%s: unsupported data relocation", name);
+ break;
+ }
+ }
+ fprintf(outfile, " arm_data_ptr[%d] = 0x%x",
+ data_index, addend);
+ if (relname[0] != '\0')
+ fprintf(outfile, " + %s", relname);
+ fprintf(outfile, ";\n");
+ }
+ }
+ }
+ p += 4;
+ }
+ data_size = (p_end - p_start) - min_offset;
+ if (data_size > 0 && outfile) {
+ fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2);
+ }
+
+ /* the last instruction must be a mov pc, lr */
+ if (p == p_start)
+ goto arm_ret_error;
+ p -= 4;
+ insn = get32((uint32_t *)p);
+ if ((insn & 0xffff0000) != 0xe91b0000) {
+ arm_ret_error:
+ if (!outfile)
+ printf("%s: invalid epilog\n", name);
+ }
+ return p - p_start;
+}
+#endif
+
+
#define MAX_ARGS 3
/* generate op code */
case EM_SPARC:
case EM_SPARC32PLUS:
{
- uint32_t start_insn, end_insn1, end_insn2, skip_insn;
+ uint32_t start_insn, end_insn1, end_insn2;
uint8_t *p;
p = (void *)(p_end - 8);
if (p <= p_start)
} else {
error("No save at the beginning of %s", name);
}
-
+#if 0
/* Skip a preceeding nop, if present. */
if (p > p_start) {
skip_insn = get32((uint32_t *)(p - 0x4));
if (skip_insn == 0x01000000)
p -= 4;
}
-
+#endif
copy_size = p - p_start;
}
break;
copy_size = p - p_start;
}
break;
+#ifdef HOST_ARM
+ case EM_ARM:
+ if ((p_end - p_start) <= 16)
+ error("%s: function too small", name);
+ if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
+ (get32((uint32_t *)(p_start + 4)) & 0xffff0000) != 0xe92d0000 ||
+ get32((uint32_t *)(p_start + 8)) != 0xe24cb004)
+ error("%s: invalid prolog", name);
+ p_start += 12;
+ start_offset += 12;
+ copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
+ relocs, nb_relocs);
+ break;
+#endif
default:
error("unknown ELF architecture");
}
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
- rel->r_offset < start_offset + copy_size) {
+ rel->r_offset < start_offset + (p_end - p_start)) {
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
if (strstart(sym_name, "__op_param", &p)) {
n = strtoul(p, NULL, 10);
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
- rel->r_offset < start_offset + copy_size) {
+ rel->r_offset < start_offset + (p_end - p_start)) {
sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
if (*sym_name &&
!strstart(sym_name, "__op_param", NULL) &&
}
}
}
+#elif defined(HOST_ARM)
+ {
+ char name[256];
+ int type;
+ int addend;
+
+ arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
+ relocs, nb_relocs);
+
+ for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ if (rel->r_offset >= start_offset &&
+ rel->r_offset < start_offset + copy_size) {
+ sym_name = strtab + symtab[ELFW(R_SYM)(rel->r_info)].st_name;
+ /* the compiler leave some unnecessary references to the code */
+ if (sym_name[0] == '\0')
+ continue;
+ if (strstart(sym_name, "__op_param", &p)) {
+ snprintf(name, sizeof(name), "param%s", p);
+ } else {
+ snprintf(name, sizeof(name), "(long)(&%s)", sym_name);
+ }
+ type = ELF32_R_TYPE(rel->r_info);
+ addend = get32((uint32_t *)(text + rel->r_offset));
+ switch(type) {
+ case R_ARM_ABS32:
+ fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
+ rel->r_offset - start_offset, name, addend);
+ break;
+ case R_ARM_PC24:
+ fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
+ rel->r_offset - start_offset, addend, name);
+ break;
+ default:
+ error("unsupported arm relocation (%d)", type);
+ }
+ }
+ }
+ }
#else
#error unsupported CPU
#endif
"{\n"
" uint8_t *gen_code_ptr;\n"
" const uint16_t *opc_ptr;\n"
-" const uint32_t *opparam_ptr;\n"
+" const uint32_t *opparam_ptr;\n");
+
+#ifdef HOST_ARM
+fprintf(outfile,
+" uint8_t *last_gen_code_ptr = gen_code_buf;\n"
+" LDREntry *arm_ldr_ptr = arm_ldr_table;\n"
+" uint32_t *arm_data_ptr = arm_data_table;\n");
+#endif
+
+fprintf(outfile,
+"\n"
" gen_code_ptr = gen_code_buf;\n"
" opc_ptr = opc_buf;\n"
" opparam_ptr = opparam_buf;\n");
/* Generate prologue, if needed. */
- switch(ELF_ARCH) {
- case EM_SPARC:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c23a080; /* sub %%sp, 128, %%sp */\n");
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc27a080; /* sub %%fp, 128, %%fp */\n");
- break;
-
- case EM_SPARCV9:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c23a100; /* sub %%sp, 256, %%sp */\n");
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc27a100; /* sub %%fp, 256, %%fp */\n");
- break;
- };
fprintf(outfile,
" for(;;) {\n"
fprintf(outfile,
" default:\n"
" goto the_end;\n"
-" }\n"
+" }\n");
+
+#ifdef HOST_ARM
+/* generate constant table if needed */
+fprintf(outfile,
+" if ((gen_code_ptr - last_gen_code_ptr) >= (MAX_FRAG_SIZE - MAX_OP_SIZE)) {\n"
+" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 1);\n"
+" last_gen_code_ptr = gen_code_ptr;\n"
+" arm_ldr_ptr = arm_ldr_table;\n"
+" arm_data_ptr = arm_data_table;\n"
+" }\n");
+#endif
+
+
+fprintf(outfile,
" }\n"
" the_end:\n"
);
break;
case EM_SPARC:
case EM_SPARC32PLUS:
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0xbc07a080; /* add %%fp, 256, %%fp */\n");
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c62008; /* jmpl %%i0 + 8, %%g0 */\n");
- fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x9c03a080; /* add %%sp, 256, %%sp */\n");
+ fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x01000000; /* nop */\n");
break;
case EM_SPARCV9:
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c7e008; /* ret */\n");
fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81e80000; /* restore */\n");
break;
+ case EM_ARM:
+ fprintf(outfile, "gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, arm_ldr_ptr, arm_data_table, arm_data_ptr, 0);\n");
+ break;
default:
error("unknown ELF architecture");
}
--- /dev/null
+/*
+ * dyngen helpers
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef __alpha__
+
+register int gp asm("$29");
+
+static inline void immediate_ldah(void *p, int val) {
+ uint32_t *dest = p;
+ long high = ((val >> 16) + ((val >> 15) & 1)) & 0xffff;
+
+ *dest &= ~0xffff;
+ *dest |= high;
+ *dest |= 31 << 16;
+}
+static inline void immediate_lda(void *dest, int val) {
+ *(uint16_t *) dest = val;
+}
+void fix_bsr(void *p, int offset) {
+ uint32_t *dest = p;
+ *dest &= ~((1 << 21) - 1);
+ *dest |= (offset >> 2) & ((1 << 21) - 1);
+}
+
+#endif /* __alpha__ */
+
+#ifdef __arm__
+
+#define MAX_OP_SIZE (128 * 4) /* in bytes */
+/* max size of the code that can be generated without calling arm_flush_ldr */
+#define MAX_FRAG_SIZE (1024 * 4)
+//#define MAX_FRAG_SIZE (135 * 4) /* for testing */
+
+typedef struct LDREntry {
+ uint8_t *ptr;
+ uint32_t *data_ptr;
+} LDREntry;
+
+static LDREntry arm_ldr_table[1024];
+static uint32_t arm_data_table[1024];
+
+extern char exec_loop;
+
+static inline void arm_reloc_pc24(uint32_t *ptr, uint32_t insn, int val)
+{
+ *ptr = (insn & ~0xffffff) | ((insn + ((val - (int)ptr) >> 2)) & 0xffffff);
+}
+
+static uint8_t *arm_flush_ldr(uint8_t *gen_code_ptr,
+ LDREntry *ldr_start, LDREntry *ldr_end,
+ uint32_t *data_start, uint32_t *data_end,
+ int gen_jmp)
+{
+ LDREntry *le;
+ uint32_t *ptr;
+ int offset, data_size, target;
+ uint8_t *data_ptr;
+ uint32_t insn;
+
+ data_size = (uint8_t *)data_end - (uint8_t *)data_start;
+
+ if (!gen_jmp) {
+ /* b exec_loop */
+ arm_reloc_pc24((uint32_t *)gen_code_ptr, 0xeafffffe, (long)(&exec_loop));
+ gen_code_ptr += 4;
+ } else {
+ /* generate branch to skip the data */
+ if (data_size == 0)
+ return gen_code_ptr;
+ target = (long)gen_code_ptr + data_size + 4;
+ arm_reloc_pc24((uint32_t *)gen_code_ptr, 0xeafffffe, target);
+ gen_code_ptr += 4;
+ }
+
+ /* copy the data */
+ data_ptr = gen_code_ptr;
+ memcpy(gen_code_ptr, data_start, data_size);
+ gen_code_ptr += data_size;
+
+ /* patch the ldr to point to the data */
+ for(le = ldr_start; le < ldr_end; le++) {
+ ptr = (uint32_t *)le->ptr;
+ offset = ((unsigned long)(le->data_ptr) - (unsigned long)data_start) +
+ (unsigned long)data_ptr -
+ (unsigned long)ptr - 8;
+ insn = *ptr & ~(0xfff | 0x00800000);
+ if (offset < 0) {
+ offset = - offset;
+ } else {
+ insn |= 0x00800000;
+ }
+ if (offset > 0xfff) {
+ fprintf(stderr, "Error ldr offset\n");
+ abort();
+ }
+ insn |= offset;
+ *ptr = insn;
+ }
+ return gen_code_ptr;
+}
+
+#endif /* __arm__ */
+
+
+
projects / sdk / emulator / qemu.git / commitdiff