typedef int32_t host_long;
typedef uint32_t host_ulong;
#define swabls(x) swab32s(x)
+#define swablss(x) swab32ss(x)
#else
typedef int64_t host_long;
typedef uint64_t host_ulong;
#define swabls(x) swab64s(x)
+#define swablss(x) swab64ss(x)
#endif
#ifdef ELF_USES_RELOCA
#ifdef CONFIG_FORMAT_COFF
-#include "a.out.h"
-
typedef int32_t host_long;
typedef uint32_t host_ulong;
+#include "a.out.h"
+
#define FILENAMELEN 256
typedef struct coff_sym {
*p = bswap32(*p);
}
+void swab32ss(int32_t *p)
+{
+ *p = bswap32(*p);
+}
+
void swab64s(uint64_t *p)
{
*p = bswap64(*p);
}
+void swab64ss(int64_t *p)
+{
+ *p = bswap64(*p);
+}
+
uint16_t get16(uint16_t *p)
{
uint16_t val;
swabls(&rel->r_offset);
swabls(&rel->r_info);
#ifdef ELF_USES_RELOCA
- swabls(&rel->r_addend);
+ swablss(&rel->r_addend);
#endif
}
}
sec = &shdr[ehdr.e_shstrndx];
- shstr = sdata[ehdr.e_shstrndx];
+ shstr = (char *)sdata[ehdr.e_shstrndx];
/* swap relocations */
for(i = 0; i < ehdr.e_shnum; i++) {
strtab_sec = &shdr[symtab_sec->sh_link];
symtab = (ElfW(Sym) *)sdata[symtab_sec - shdr];
- strtab = sdata[symtab_sec->sh_link];
+ strtab = (char *)sdata[symtab_sec->sh_link];
nb_syms = symtab_sec->sh_size / sizeof(ElfW(Sym));
if (do_swap) {
name = get_sym_name(symtab + *(uint32_t *)(rel->r_reloc->r_symndx));
if (!strcmp(name, ".data"))
name = name_for_dotdata(rel);
+ if (name[0] == '.')
+ return NULL;
return name;
}
} else {
#ifdef HOST_SPARC
if (sym_name[0] == '.')
- snprintf(name, sizeof(name),
+ snprintf(name, name_size,
"(long)(&__dot_%s)",
sym_name + 1);
else
}
}
+#ifdef HOST_IA64
+
+#define PLT_ENTRY_SIZE 16 /* 1 bundle containing "brl" */
+
+struct plt_entry {
+ struct plt_entry *next;
+ const char *name;
+ unsigned long addend;
+} *plt_list;
+
+static int
+get_plt_index (const char *name, unsigned long addend)
+{
+ struct plt_entry *plt, *prev= NULL;
+ int index = 0;
+
+ /* see if we already have an entry for this target: */
+ for (plt = plt_list; plt; ++index, prev = plt, plt = plt->next)
+ if (strcmp(plt->name, name) == 0 && plt->addend == addend)
+ return index;
+
+ /* nope; create a new PLT entry: */
+
+ plt = malloc(sizeof(*plt));
+ if (!plt) {
+ perror("malloc");
+ exit(1);
+ }
+ memset(plt, 0, sizeof(*plt));
+ plt->name = strdup(name);
+ plt->addend = addend;
+
+ /* append to plt-list: */
+ if (prev)
+ prev->next = plt;
+ else
+ plt_list = plt;
+ return index;
+}
+
+#endif
+
#ifdef HOST_ARM
int arm_emit_ldr_info(const char *name, unsigned long start_offset,
{
uint8_t *p;
uint32_t insn;
- int offset, min_offset, pc_offset, data_size;
+ int offset, min_offset, pc_offset, data_size, spare, max_pool;
uint8_t data_allocated[1024];
unsigned int data_index;
+ int type;
memset(data_allocated, 0, sizeof(data_allocated));
p = p_start;
min_offset = p_end - p_start;
+ spare = 0x7fffffff;
while (p < p_start + min_offset) {
insn = get32((uint32_t *)p);
+ /* TODO: Armv5e ldrd. */
+ /* TODO: VFP load. */
if ((insn & 0x0d5f0000) == 0x051f0000) {
/* ldr reg, [pc, #im] */
offset = insn & 0xfff;
if (!(insn & 0x00800000))
- offset = -offset;
+ offset = -offset;
+ max_pool = 4096;
+ type = 0;
+ } else if ((insn & 0x0e5f0f00) == 0x0c1f0100) {
+ /* FPA ldf. */
+ offset = (insn & 0xff) << 2;
+ if (!(insn & 0x00800000))
+ offset = -offset;
+ max_pool = 1024;
+ type = 1;
+ } else if ((insn & 0x0fff0000) == 0x028f0000) {
+ /* Some gcc load a doubleword immediate with
+ add regN, pc, #imm
+ ldmia regN, {regN, regM}
+ Hope and pray the compiler never generates somethin like
+ add reg, pc, #imm1; ldr reg, [reg, #-imm2]; */
+ int r;
+
+ r = (insn & 0xf00) >> 7;
+ offset = ((insn & 0xff) >> r) | ((insn & 0xff) << (32 - r));
+ max_pool = 1024;
+ type = 2;
+ } else {
+ max_pool = 0;
+ type = -1;
+ }
+ if (type >= 0) {
+ /* PC-relative load needs fixing up. */
+ if (spare > max_pool - offset)
+ spare = max_pool - offset;
if ((offset & 3) !=0)
- error("%s:%04x: ldr pc offset must be 32 bit aligned",
+ error("%s:%04x: pc offset must be 32 bit aligned",
+ name, start_offset + p - p_start);
+ if (offset < 0)
+ error("%s:%04x: Embedded literal value",
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",
+ error("%s:%04x: 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 */
+ /* The intruction 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",
+ /* The position of the constant pool data. */
+ data_index = ((p_end - p_start) - pc_offset) >> 2;
+ fprintf(outfile, " arm_ldr_ptr->data_ptr = arm_data_ptr - %d;\n",
data_index);
+ fprintf(outfile, " arm_ldr_ptr->type = %d;\n", type);
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 = get_rel_sym_name(rel);
- /* the compiler leave some unnecessary references to the code */
- get_reloc_expr(relname, sizeof(relname), 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;
}
+
+ /* Copy and relocate the constant pool data. */
data_size = (p_end - p_start) - min_offset;
if (data_size > 0 && outfile) {
- fprintf(outfile, " arm_data_ptr += %d;\n", data_size >> 2);
+ spare += min_offset;
+ fprintf(outfile, " arm_data_ptr -= %d;\n", data_size >> 2);
+ fprintf(outfile, " arm_pool_ptr -= %d;\n", data_size);
+ fprintf(outfile, " if (arm_pool_ptr > gen_code_ptr + %d)\n"
+ " arm_pool_ptr = gen_code_ptr + %d;\n",
+ spare, spare);
+
+ data_index = 0;
+ for (pc_offset = min_offset;
+ pc_offset < p_end - p_start;
+ pc_offset += 4) {
+
+ ELF_RELOC *rel;
+ int i, addend, type;
+ const char *sym_name;
+ char relname[1024];
+
+ /* 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 = get_rel_sym_name(rel);
+ /* the compiler leave some unnecessary references to the code */
+ get_reloc_expr(relname, sizeof(relname), 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");
+
+ data_index++;
+ }
}
- /* 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) {
+ /* The last instruction must be an ldm instruction. There are several
+ forms generated by gcc:
+ ldmib sp, {..., pc} (implies a sp adjustment of +4)
+ ldmia sp, {..., pc}
+ ldmea fp, {..., pc} */
+ if ((insn & 0xffff8000) == 0xe99d8000) {
+ if (outfile) {
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = 0xe28dd004;\n",
+ p - p_start);
+ }
+ p += 4;
+ } else if ((insn & 0xffff8000) != 0xe89d8000
+ && (insn & 0xffff8000) != 0xe91b8000) {
arm_ret_error:
if (!outfile)
printf("%s: invalid epilog\n", name);
}
- return p - p_start;
+ return p - p_start;
}
#endif
/* 08 00 84 00 */
if (get32((uint32_t *)p) != 0x00840008)
error("br.ret.sptk.many b0;; expected at the end of %s", name);
- copy_size = p - p_start;
+ copy_size = p_end - p_start;
}
#elif defined(HOST_SPARC)
{
+#define INSN_SAVE 0x9de3a000
+#define INSN_RET 0x81c7e008
+#define INSN_RETL 0x81c3e008
+#define INSN_RESTORE 0x81e80000
+#define INSN_RETURN 0x81cfe008
+#define INSN_NOP 0x01000000
+#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp
+#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp
+
uint32_t start_insn, end_insn1, end_insn2;
uint8_t *p;
p = (void *)(p_end - 8);
start_insn = get32((uint32_t *)(p_start + 0x0));
end_insn1 = get32((uint32_t *)(p + 0x0));
end_insn2 = get32((uint32_t *)(p + 0x4));
- if ((start_insn & ~0x1fff) == 0x9de3a000) {
+ if (((start_insn & ~0x1fff) == INSN_SAVE) ||
+ (start_insn & ~0x1fff) == INSN_ADD_SP) {
p_start += 0x4;
start_offset += 0x4;
- if ((int)(start_insn | ~0x1fff) < -128)
- error("Found bogus save at the start of %s", name);
- if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
+ if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
+ /* SPARC v7: ret; restore; */ ;
+ else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
+ /* SPARC v9: return; nop; */ ;
+ else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
+ /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
+ else
+
error("ret; restore; not found at end of %s", name);
+ } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
+ ;
} else {
error("No save at the beginning of %s", name);
}
/* Skip a preceeding nop, if present. */
if (p > p_start) {
skip_insn = get32((uint32_t *)(p - 0x4));
- if (skip_insn == 0x01000000)
+ if (skip_insn == INSN_NOP)
p -= 4;
}
#endif
}
#elif defined(HOST_SPARC64)
{
+#define INSN_SAVE 0x9de3a000
+#define INSN_RET 0x81c7e008
+#define INSN_RETL 0x81c3e008
+#define INSN_RESTORE 0x81e80000
+#define INSN_RETURN 0x81cfe008
+#define INSN_NOP 0x01000000
+#define INSN_ADD_SP 0x9c03a000 // add %sp, nn, %sp
+#define INSN_SUB_SP 0x9c23a000 // sub %sp, nn, %sp
+
uint32_t start_insn, end_insn1, end_insn2, skip_insn;
uint8_t *p;
p = (void *)(p_end - 8);
+#if 0
+ /* XXX: check why it occurs */
if (p <= p_start)
error("empty code for %s", name);
+#endif
start_insn = get32((uint32_t *)(p_start + 0x0));
end_insn1 = get32((uint32_t *)(p + 0x0));
end_insn2 = get32((uint32_t *)(p + 0x4));
- if ((start_insn & ~0x1fff) == 0x9de3a000) {
+ if (((start_insn & ~0x1fff) == INSN_SAVE) ||
+ (start_insn & ~0x1fff) == INSN_ADD_SP) {
p_start += 0x4;
start_offset += 0x4;
- if ((int)(start_insn | ~0x1fff) < -256)
- error("Found bogus save at the start of %s", name);
- if (end_insn1 != 0x81c7e008 || end_insn2 != 0x81e80000)
+ if (end_insn1 == INSN_RET && end_insn2 == INSN_RESTORE)
+ /* SPARC v7: ret; restore; */ ;
+ else if (end_insn1 == INSN_RETURN && end_insn2 == INSN_NOP)
+ /* SPARC v9: return; nop; */ ;
+ else if (end_insn1 == INSN_RETL && (end_insn2 & ~0x1fff) == INSN_SUB_SP)
+ /* SPARC v7: retl; sub %sp, nn, %sp; */ ;
+ else
+
error("ret; restore; not found at end of %s", name);
+ } else if (end_insn1 == INSN_RETL && end_insn2 == INSN_NOP) {
+ ;
} else {
error("No save at the beginning of %s", name);
}
}
#elif defined(HOST_ARM)
{
+ uint32_t insn;
+
if ((p_end - p_start) <= 16)
error("%s: function too small", name);
if (get32((uint32_t *)p_start) != 0xe1a0c00d ||
error("%s: invalid prolog", name);
p_start += 12;
start_offset += 12;
+ insn = get32((uint32_t *)p_start);
+ if ((insn & 0xffffff00) == 0xe24dd000) {
+ /* Stack adjustment. Assume op uses the frame pointer. */
+ p_start -= 4;
+ start_offset -= 4;
+ }
copy_size = arm_emit_ldr_info(name, start_offset, NULL, p_start, p_end,
relocs, nb_relocs);
}
}
fprintf(outfile, ";\n");
}
+#if defined(HOST_IA64)
+ fprintf(outfile, " extern char %s;\n", name);
+#else
fprintf(outfile, " extern void %s();\n", name);
+#endif
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
host_ulong offset = get_rel_offset(rel);
continue;
}
#endif
-#ifdef __APPLE__
+#if defined(__APPLE__)
/* set __attribute((unused)) on darwin because we wan't to avoid warning when we don't use the symbol */
fprintf(outfile, "extern char %s __attribute__((unused));\n", sym_name);
+#elif defined(HOST_IA64)
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ /*
+ * PCREL21 br.call targets generally
+ * are out of range and need to go
+ * through an "import stub".
+ */
+ fprintf(outfile, " extern char %s;\n",
+ sym_name);
#else
fprintf(outfile, "extern char %s;\n", sym_name);
#endif
{
EXE_SYM *sym;
const char *sym_name, *p;
- unsigned long val;
+ host_ulong val;
int n;
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
#ifdef CONFIG_FORMAT_MACH
offset -= section_hdr[sym->n_sect-1].addr;
#endif
- val = *(unsigned long *)(ptr + offset);
+ val = *(host_ulong *)(ptr + offset);
#ifdef ELF_USES_RELOCA
{
int reloc_shndx, nb_relocs1, j;
#endif
if (val >= start_offset && val <= start_offset + copy_size) {
n = strtol(p, NULL, 10);
- fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, val - start_offset);
+ fprintf(outfile, " label_offsets[%d] = %ld + (gen_code_ptr - gen_code_buf);\n", n, (long)(val - start_offset));
}
}
}
char name[256];
int type;
int addend;
+ int reloc_offset;
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 = get_rel_sym_name(rel);
+ if (!sym_name)
+ continue;
+ reloc_offset = rel->r_offset - start_offset;
if (strstart(sym_name, "__op_jmp", &p)) {
int n;
n = strtol(p, NULL, 10);
chaining: the offset of the instruction
needs to be stored */
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
- n, rel->r_offset - start_offset);
+ n, reloc_offset);
continue;
}
-
+
get_reloc_expr(name, sizeof(name), sym_name);
addend = get32((uint32_t *)(text + rel->r_offset));
#ifdef CONFIG_FORMAT_ELF
switch(type) {
case R_386_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_386_PC32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
- rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
+ reloc_offset, name, reloc_offset, addend);
break;
default:
error("unsupported i386 relocation (%d)", type);
switch(type) {
case DIR32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case DISP32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d -4;\n",
- rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
+ reloc_offset, name, reloc_offset, addend);
break;
default:
error("unsupported i386 relocation (%d)", type);
char name[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
get_reloc_expr(name, sizeof(name), sym_name);
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
case R_X86_64_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (uint32_t)%s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_X86_64_32S:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (int32_t)%s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_X86_64_PC32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %d) + %d;\n",
- rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
+ reloc_offset, name, reloc_offset, addend);
break;
default:
error("unsupported X86_64 relocation (%d)", type);
char name[256];
int type;
int addend;
+ int reloc_offset;
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;
+ reloc_offset = rel->r_offset - start_offset;
if (strstart(sym_name, "__op_jmp", &p)) {
int n;
n = strtol(p, NULL, 10);
chaining: the offset of the instruction
needs to be stored */
fprintf(outfile, " jmp_offsets[%d] = %d + (gen_code_ptr - gen_code_buf);\n",
- n, rel->r_offset - start_offset);
+ n, reloc_offset);
continue;
}
switch(type) {
case R_PPC_ADDR32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_PPC_ADDR16_LO:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_PPC_ADDR16_HI:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_PPC_ADDR16_HA:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d + 0x8000) >> 16;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_PPC_REL24:
/* warning: must be at 32 MB distancy */
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = (*(uint32_t *)(gen_code_ptr + %d) & ~0x03fffffc) | ((%s - (long)(gen_code_ptr + %d) + %d) & 0x03fffffc);\n",
- rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
+ reloc_offset, reloc_offset, name, reloc_offset, addend);
break;
default:
error("unsupported powerpc relocation (%d)", type);
char name[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
get_reloc_expr(name, sizeof(name), sym_name);
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
case R_390_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_390_16:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_390_8:
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
default:
error("unsupported s390 relocation (%d)", type);
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
int type;
+ long reloc_offset;
type = ELF64_R_TYPE(rel->r_info);
sym_name = strtab + symtab[ELF64_R_SYM(rel->r_info)].st_name;
+ reloc_offset = rel->r_offset - start_offset;
switch (type) {
case R_ALPHA_GPDISP:
/* The gp is just 32 bit, and never changes, so it's easiest to emit it
as an immediate instead of constructing it from the pv or ra. */
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, gp);\n",
- rel->r_offset - start_offset);
+ reloc_offset);
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
- rel->r_offset - start_offset + rel->r_addend);
+ reloc_offset + (int)rel->r_addend);
break;
case R_ALPHA_LITUSE:
/* jsr to literal hint. Could be used to optimize to bsr. Ignore for
special treatment. */
if (strstart(sym_name, "__op_param", &p))
fprintf(outfile, " immediate_ldah(gen_code_ptr + %ld, param%s);\n",
- rel->r_offset - start_offset, p);
+ reloc_offset, p);
break;
case R_ALPHA_GPRELLOW:
if (strstart(sym_name, "__op_param", &p))
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, param%s);\n",
- rel->r_offset - start_offset, p);
+ reloc_offset, p);
break;
case R_ALPHA_BRSGP:
/* PC-relative jump. Tweak offset to skip the two instructions that try to
set up the gp from the pv. */
fprintf(outfile, " fix_bsr(gen_code_ptr + %ld, (uint8_t *) &%s - (gen_code_ptr + %ld + 4) + 8);\n",
- rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
+ reloc_offset, sym_name, reloc_offset);
break;
default:
error("unsupported Alpha relocation (%d)", type);
}
#elif defined(HOST_IA64)
{
+ unsigned long sym_idx;
+ long code_offset;
char name[256];
int type;
- int addend;
+ long addend;
+
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[ELF64_R_SYM(rel->r_info)].st_name;
- get_reloc_expr(name, sizeof(name), sym_name);
- type = ELF64_R_TYPE(rel->r_info);
- addend = rel->r_addend;
- switch(type) {
- case R_IA64_LTOFF22:
- error("must implemnt R_IA64_LTOFF22 relocation");
- case R_IA64_PCREL21B:
- error("must implemnt R_IA64_PCREL21B relocation");
- default:
- error("unsupported ia64 relocation (%d)", type);
- }
- }
+ sym_idx = ELF64_R_SYM(rel->r_info);
+ if (rel->r_offset < start_offset
+ || rel->r_offset >= start_offset + copy_size)
+ continue;
+ sym_name = (strtab + symtab[sym_idx].st_name);
+ code_offset = rel->r_offset - start_offset;
+ if (strstart(sym_name, "__op_jmp", &p)) {
+ int n;
+ n = strtol(p, NULL, 10);
+ /* __op_jmp relocations are done at
+ runtime to do translated block
+ chaining: the offset of the instruction
+ needs to be stored */
+ fprintf(outfile, " jmp_offsets[%d] ="
+ "%ld + (gen_code_ptr - gen_code_buf);\n",
+ n, code_offset);
+ continue;
+ }
+ get_reloc_expr(name, sizeof(name), sym_name);
+ type = ELF64_R_TYPE(rel->r_info);
+ addend = rel->r_addend;
+ switch(type) {
+ case R_IA64_IMM64:
+ fprintf(outfile,
+ " ia64_imm64(gen_code_ptr + %ld, "
+ "%s + %ld);\n",
+ code_offset, name, addend);
+ break;
+ case R_IA64_LTOFF22X:
+ case R_IA64_LTOFF22:
+ fprintf(outfile, " IA64_LTOFF(gen_code_ptr + %ld,"
+ " %s + %ld, %d);\n",
+ code_offset, name, addend,
+ (type == R_IA64_LTOFF22X));
+ break;
+ case R_IA64_LDXMOV:
+ fprintf(outfile,
+ " ia64_ldxmov(gen_code_ptr + %ld,"
+ " %s + %ld);\n", code_offset, name, addend);
+ break;
+
+ case R_IA64_PCREL21B:
+ if (strstart(sym_name, "__op_gen_label", NULL)) {
+ fprintf(outfile,
+ " ia64_imm21b(gen_code_ptr + %ld,"
+ " (long) (%s + %ld -\n\t\t"
+ "((long) gen_code_ptr + %ld)) >> 4);\n",
+ code_offset, name, addend,
+ code_offset & ~0xfUL);
+ } else {
+ fprintf(outfile,
+ " IA64_PLT(gen_code_ptr + %ld, "
+ "%d);\t/* %s + %ld */\n",
+ code_offset,
+ get_plt_index(sym_name, addend),
+ sym_name, addend);
+ }
+ break;
+ default:
+ error("unsupported ia64 relocation (0x%x)",
+ type);
+ }
}
+ fprintf(outfile, " ia64_nop_b(gen_code_ptr + %d);\n",
+ copy_size - 16 + 2);
}
#elif defined(HOST_SPARC)
{
char name[256];
int type;
int addend;
+ int reloc_offset;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
rel->r_offset < start_offset + copy_size) {
get_reloc_expr(name, sizeof(name), sym_name);
type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_SPARC_HI22:
fprintf(outfile,
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
" | (((%s + %d) >> 10) & 0x3fffff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend);
+ reloc_offset, reloc_offset, name, addend);
break;
case R_SPARC_LO10:
fprintf(outfile,
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend);
+ reloc_offset, reloc_offset, name, addend);
break;
case R_SPARC_WDISP30:
fprintf(outfile,
" & ~0x3fffffff) "
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffffff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend,
- rel->r_offset - start_offset);
+ reloc_offset, reloc_offset, name, addend,
+ reloc_offset);
break;
+ case R_SPARC_WDISP22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x3fffff) "
+ " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
+ " & 0x3fffff);\n",
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
+ name, addend,
+ rel->r_offset - start_offset);
+ break;
default:
error("unsupported sparc relocation (%d)", type);
}
char name[256];
int type;
int addend;
+ int reloc_offset;
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[ELF64_R_SYM(rel->r_info)].st_name;
get_reloc_expr(name, sizeof(name), sym_name);
- type = ELF64_R_TYPE(rel->r_info);
+ type = ELF32_R_TYPE(rel->r_info);
addend = rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - start_offset, name, addend);
+ reloc_offset, name, addend);
break;
case R_SPARC_HI22:
fprintf(outfile,
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
" | (((%s + %d) >> 10) & 0x3fffff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend);
+ reloc_offset, reloc_offset, name, addend);
break;
case R_SPARC_LO10:
fprintf(outfile,
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend);
+ reloc_offset, reloc_offset, name, addend);
+ break;
+ case R_SPARC_OLO10:
+ addend += ELF64_R_TYPE_DATA (rel->r_info);
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x3ff) "
+ " | ((%s + %d) & 0x3ff);\n",
+ reloc_offset, reloc_offset, name, addend);
break;
case R_SPARC_WDISP30:
fprintf(outfile,
" & ~0x3fffffff) "
" | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffffff);\n",
- rel->r_offset - start_offset,
- rel->r_offset - start_offset,
- name, addend,
- rel->r_offset - start_offset);
+ reloc_offset, reloc_offset, name, addend,
+ reloc_offset);
+ break;
+ case R_SPARC_WDISP22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x3fffff) "
+ " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
+ " & 0x3fffff);\n",
+ reloc_offset, reloc_offset, name, addend,
+ reloc_offset);
+ break;
+ case R_SPARC_HH22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | (((%s + %d) >> 42) & 0x00000000);\n",
+ reloc_offset, reloc_offset, name, addend);
+ break;
+
+ case R_SPARC_LM22:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | (((%s + %d) >> 10) & 0x00000000);\n",
+ reloc_offset, reloc_offset, name, addend);
break;
+
+ case R_SPARC_HM10:
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + %d) = "
+ "((*(uint32_t *)(gen_code_ptr + %d)) "
+ " & ~0x00000000) "
+ " | ((((%s + %d) >> 32 & 0x3ff)) & 0x00000000);\n",
+ reloc_offset, reloc_offset, name, addend);
+ break;
+
default:
- error("unsupported sparc64 relocation (%d)", type);
+ error("unsupported sparc64 relocation (%d) for symbol %s", type, name);
}
}
}
char name[256];
int type;
int addend;
-
+ int reloc_offset;
+ uint32_t insn;
+
+ insn = get32((uint32_t *)(p_start + 4));
+ /* If prologue ends in sub sp, sp, #const then assume
+ op has a stack frame and needs the frame pointer. */
+ if ((insn & 0xffffff00) == 0xe24dd000) {
+ int i;
+ uint32_t opcode;
+ opcode = 0xe28db000; /* add fp, sp, #0. */
+#if 0
+/* ??? Need to undo the extra stack adjustment at the end of the op.
+ For now just leave the stack misaligned and hope it doesn't break anything
+ too important. */
+ if ((insn & 4) != 0) {
+ /* Preserve doubleword stack alignment. */
+ fprintf(outfile,
+ " *(uint32_t *)(gen_code_ptr + 4)= 0x%x;\n",
+ insn + 4);
+ opcode -= 4;
+ }
+#endif
+ insn = get32((uint32_t *)(p_start - 4));
+ /* Calculate the size of the saved registers,
+ excluding pc. */
+ for (i = 0; i < 15; i++) {
+ if (insn & (1 << i))
+ opcode += 4;
+ }
+ fprintf(outfile,
+ " *(uint32_t *)gen_code_ptr = 0x%x;\n", opcode);
+ }
arm_emit_ldr_info(name, start_offset, outfile, p_start, p_end,
relocs, nb_relocs);
get_reloc_expr(name, sizeof(name), sym_name);
type = ELF32_R_TYPE(rel->r_info);
addend = get32((uint32_t *)(text + rel->r_offset));
+ reloc_offset = rel->r_offset - start_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);
+ reloc_offset, name, addend);
break;
case R_ARM_PC24:
+ case R_ARM_JUMP24:
+ case R_ARM_CALL:
fprintf(outfile, " arm_reloc_pc24((uint32_t *)(gen_code_ptr + %d), 0x%x, %s);\n",
- rel->r_offset - start_offset, addend, name);
+ reloc_offset, addend, name);
break;
default:
error("unsupported arm relocation (%d)", type);
char name[256];
int type;
int addend;
+ int reloc_offset;
Elf32_Sym *sym;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
if (rel->r_offset >= start_offset &&
get_reloc_expr(name, sizeof(name), sym_name);
type = ELF32_R_TYPE(rel->r_info);
addend = get32((uint32_t *)(text + rel->r_offset)) + rel->r_addend;
+ reloc_offset = rel->r_offset - start_offset;
switch(type) {
case R_68K_32:
fprintf(outfile, " /* R_68K_32 RELOC, offset %x */\n", rel->r_offset) ;
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %#x;\n",
- rel->r_offset - start_offset, name, addend );
+ reloc_offset, name, addend );
break;
case R_68K_PC32:
fprintf(outfile, " /* R_68K_PC32 RELOC, offset %x */\n", rel->r_offset);
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s - (long)(gen_code_ptr + %#x) + %#x;\n",
- rel->r_offset - start_offset, name, rel->r_offset - start_offset, /*sym->st_value+*/ addend);
+ reloc_offset, name, reloc_offset, /*sym->st_value+*/ addend);
break;
default:
error("unsupported m68k relocation (%d)", type);
} else {
/* generate big code generation switch */
+
+#ifdef HOST_ARM
+ /* We need to know the size of all the ops so we can figure out when
+ to emit constant pools. This must be consistent with opc.h. */
+fprintf(outfile,
+"static const uint32_t arm_opc_size[] = {\n"
+" 0,\n" /* end */
+" 0,\n" /* nop */
+" 0,\n" /* nop1 */
+" 0,\n" /* nop2 */
+" 0,\n"); /* nop3 */
+ for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
+ const char *name;
+ name = get_sym_name(sym);
+ if (strstart(name, OP_PREFIX, NULL)) {
+ fprintf(outfile, " %d,\n", sym->st_size);
+ }
+ }
+fprintf(outfile,
+"};\n");
+#endif
+
fprintf(outfile,
"int dyngen_code(uint8_t *gen_code_buf,\n"
" uint16_t *label_offsets, uint16_t *jmp_offsets,\n"
" const uint32_t *opparam_ptr;\n");
#ifdef HOST_ARM
+/* Arm is tricky because it uses constant pools for loading immediate values.
+ We assume (and require) each function is code followed by a constant pool.
+ All the ops are small so this should be ok. For each op we figure
+ out how much "spare" range we have in the load instructions. This allows
+ us to insert subsequent ops in between the op and the constant pool,
+ eliminating the neeed to jump around the pool.
+
+ We currently generate:
+
+ [ For this example we assume merging would move op1_pool out of range.
+ In practice we should be able to combine many ops before the offset
+ limits are reached. ]
+ op1_code;
+ op2_code;
+ goto op3;
+ op2_pool;
+ op1_pool;
+op3:
+ op3_code;
+ ret;
+ op3_pool;
+
+ Ideally we'd put op1_pool before op2_pool, but that requires two passes.
+ */
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");
+" uint32_t *arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
+/* Initialise the parmissible pool offset to an arbitary large value. */
+" uint8_t *arm_pool_ptr = gen_code_buf + 0x1000000;\n");
+#endif
+#ifdef HOST_IA64
+ {
+ long addend, not_first = 0;
+ unsigned long sym_idx;
+ int index, max_index;
+ const char *sym_name;
+ EXE_RELOC *rel;
+
+ max_index = -1;
+ for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ sym_idx = ELF64_R_SYM(rel->r_info);
+ sym_name = (strtab + symtab[sym_idx].st_name);
+ if (strstart(sym_name, "__op_gen_label", NULL))
+ continue;
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ continue;
+
+ addend = rel->r_addend;
+ index = get_plt_index(sym_name, addend);
+ if (index <= max_index)
+ continue;
+ max_index = index;
+ fprintf(outfile, " extern void %s(void);\n", sym_name);
+ }
+
+ fprintf(outfile,
+ " struct ia64_fixup *plt_fixes = NULL, "
+ "*ltoff_fixes = NULL;\n"
+ " static long plt_target[] = {\n\t");
+
+ max_index = -1;
+ for (i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
+ sym_idx = ELF64_R_SYM(rel->r_info);
+ sym_name = (strtab + symtab[sym_idx].st_name);
+ if (strstart(sym_name, "__op_gen_label", NULL))
+ continue;
+ if (ELF64_R_TYPE(rel->r_info) != R_IA64_PCREL21B)
+ continue;
+
+ addend = rel->r_addend;
+ index = get_plt_index(sym_name, addend);
+ if (index <= max_index)
+ continue;
+ max_index = index;
+
+ if (not_first)
+ fprintf(outfile, ",\n\t");
+ not_first = 1;
+ if (addend)
+ fprintf(outfile, "(long) &%s + %ld", sym_name, addend);
+ else
+ fprintf(outfile, "(long) &%s", sym_name);
+ }
+ fprintf(outfile, "\n };\n"
+ " unsigned int plt_offset[%u] = { 0 };\n", max_index + 1);
+ }
#endif
fprintf(outfile,
/* Generate prologue, if needed. */
fprintf(outfile,
-" for(;;) {\n"
-" switch(*opc_ptr++) {\n"
-);
+" for(;;) {\n");
+
+#ifdef HOST_ARM
+/* Generate constant pool if needed */
+fprintf(outfile,
+" if (gen_code_ptr + arm_opc_size[*opc_ptr] >= arm_pool_ptr) {\n"
+" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
+"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 1);\n"
+" last_gen_code_ptr = gen_code_ptr;\n"
+" arm_ldr_ptr = arm_ldr_table;\n"
+" arm_data_ptr = arm_data_table + ARM_LDR_TABLE_SIZE;\n"
+" arm_pool_ptr = gen_code_ptr + 0x1000000;\n"
+" }\n");
+#endif
+
+fprintf(outfile,
+" switch(*opc_ptr++) {\n");
for(i = 0, sym = symtab; i < nb_syms; i++, sym++) {
const char *name;
" goto the_end;\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"
);
+#ifdef HOST_IA64
+ fprintf(outfile,
+ " {\n"
+ " extern char code_gen_buffer[];\n"
+ " ia64_apply_fixes(&gen_code_ptr, ltoff_fixes, "
+ "(uint64_t) code_gen_buffer + 2*(1<<20), plt_fixes,\n\t\t\t"
+ "sizeof(plt_target)/sizeof(plt_target[0]),\n\t\t\t"
+ "plt_target, plt_offset);\n }\n");
+#endif
/* generate some code patching */
#ifdef HOST_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");
+fprintf(outfile,
+"if (arm_data_ptr != arm_data_table + ARM_LDR_TABLE_SIZE)\n"
+" gen_code_ptr = arm_flush_ldr(gen_code_ptr, arm_ldr_table, "
+"arm_ldr_ptr, arm_data_ptr, arm_data_table + ARM_LDR_TABLE_SIZE, 0);\n");
#endif
/* flush instruction cache */
fprintf(outfile, "flush_icache_range((unsigned long)gen_code_buf, (unsigned long)gen_code_ptr);\n");
projects / qemu / blobdiff