{
int copy_size = 0;
uint8_t *p_start, *p_end;
+ host_ulong start_offset;
int nb_args, i, n;
uint8_t args_present[MAX_ARGS];
const char *sym_name, *p;
ELF_RELOC *rel;
- /* compute exact size excluding return instruction */
+ /* Compute exact size excluding prologue and epilogue instructions.
+ * Increment start_offset to skip epilogue instructions, then compute
+ * copy_size the indicate the size of the remaining instructions (in
+ * bytes).
+ */
p_start = text + offset;
p_end = p_start + size;
+ start_offset = offset;
switch(ELF_ARCH) {
case EM_386:
{
case EM_SPARC:
case EM_SPARC32PLUS:
{
+ uint32_t start_insn, end_insn1, end_insn2, skip_insn;
uint8_t *p;
p = (void *)(p_end - 8);
if (p <= p_start)
error("empty code for %s", name);
- if (get32((uint32_t *)(p_start + 0x0)) != 0x9de3bf98)
- error("save %%sp,-104,%%sp expected at the start of %s "
- "found [%08x]",
- name, get32((uint32_t *)(p_start + 0x0)));
- if (get32((uint32_t *)(p + 0x0)) != 0x81c7e008 ||
- get32((uint32_t *)(p + 0x4)) != 0x81e80000)
- error("ret; restore; expected at the end of %s found [%08x:%08x]",
- name,
- get32((uint32_t *)(p + 0x0)),
- get32((uint32_t *)(p + 0x4)));
+ 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) {
+ 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)
+ error("ret; restore; not found at end of %s", name);
+ } 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)
+ p -= 4;
+ }
copy_size = p - p_start;
}
break;
case EM_SPARCV9:
{
+ uint32_t start_insn, end_insn1, end_insn2, skip_insn;
uint8_t *p;
p = (void *)(p_end - 8);
if (p <= p_start)
error("empty code for %s", name);
- if (get32((uint32_t *)(p_start + 0x0)) != 0x9de3bf40)
- error("save %%sp,-192,%%sp expected at the start of %s "
- "found [%08x]",
- name, get32((uint32_t *)(p_start + 0x0)));
- if (get32((uint32_t *)(p + 0x0)) != 0x81cfe008 ||
- get32((uint32_t *)(p + 0x4)) != 0x01000000)
- error("rett %%i7+8; nop; expected at the end of %s "
- "found [%08x:%08x]",
- name,
- get32((uint32_t *)(p + 0x0)),
- get32((uint32_t *)(p + 0x4)));
+ 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) {
+ 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)
+ error("ret; restore; not found at end of %s", name);
+ } 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)
+ p -= 4;
+ }
+
copy_size = p - p_start;
}
break;
args_present[i] = 0;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
n = strtoul(p, NULL, 10);
fprintf(outfile, " extern void %s();\n", name);
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (*sym_name && !strstart(sym_name, "__op_param", &p)) {
#if defined(HOST_SPARC)
}
}
- fprintf(outfile, " memcpy(gen_code_ptr, &%s, %d);\n", name, copy_size);
+ fprintf(outfile, " memcpy(gen_code_ptr, (void *)((char *)&%s+%d), %d);\n", name, start_offset - offset, copy_size);
for(i = 0; i < nb_args; i++) {
fprintf(outfile, " param%d = *opparam_ptr++;\n", i + 1);
}
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
switch(type) {
case R_386_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_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 - offset, name, rel->r_offset - offset, addend);
+ rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
break;
default:
error("unsupported i386 relocation (%d)", type);
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
switch(type) {
case R_PPC_ADDR32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_PPC_ADDR16_LO:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d);\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_PPC_ADDR16_HI:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = (%s + %d) >> 16;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_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 - offset, name, addend);
+ rel->r_offset - start_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 - offset, rel->r_offset - offset, name, rel->r_offset - offset, addend);
+ rel->r_offset - start_offset, rel->r_offset - start_offset, name, rel->r_offset - start_offset, addend);
break;
default:
error("unsupported powerpc relocation (%d)", type);
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
switch(type) {
case R_390_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_390_16:
fprintf(outfile, " *(uint16_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_390_8:
fprintf(outfile, " *(uint8_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
default:
error("unsupported s390 relocation (%d)", type);
#elif defined(HOST_ALPHA)
{
for (i = 0, rel = relocs; i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ if (rel->r_offset >= start_offset && rel->r_offset < start_offset + copy_size) {
int type;
type = ELF64_R_TYPE(rel->r_info);
/* 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 - offset);
+ rel->r_offset - start_offset);
fprintf(outfile, " immediate_lda(gen_code_ptr + %ld, gp);\n",
- rel->r_offset - offset + rel->r_addend);
+ rel->r_offset - start_offset + 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 - offset, p);
+ rel->r_offset - start_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 - offset, p);
+ rel->r_offset - start_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);\n",
- rel->r_offset - offset, sym_name, rel->r_offset - offset);
+ rel->r_offset - start_offset, sym_name, rel->r_offset - start_offset);
break;
default:
error("unsupported Alpha relocation (%d)", type);
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ if (rel->r_offset >= start_offset &&
+ rel->r_offset < start_offset + copy_size) {
sym_name = strtab + symtab[ELF32_R_SYM(rel->r_info)].st_name;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_SPARC_HI22:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
- " | ((%s + %d) & 0x3fffff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
+ " | (((%s + %d) >> 10) & 0x3fffff);\n",
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
name, addend);
break;
case R_SPARC_LO10:
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
name, addend);
break;
case R_SPARC_WDISP30:
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
- " | ((((%s + %d) - (long)gen_code_ptr)>>2) "
+ " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffffff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
- name, addend);
+ 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);
int type;
int addend;
for(i = 0, rel = relocs;i < nb_relocs; i++, rel++) {
- if (rel->r_offset >= offset && rel->r_offset < offset + copy_size) {
+ 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;
if (strstart(sym_name, "__op_param", &p)) {
snprintf(name, sizeof(name), "param%s", p);
switch(type) {
case R_SPARC_32:
fprintf(outfile, " *(uint32_t *)(gen_code_ptr + %d) = %s + %d;\n",
- rel->r_offset - offset, name, addend);
+ rel->r_offset - start_offset, name, addend);
break;
case R_SPARC_HI22:
fprintf(outfile,
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffff) "
- " | ((%s + %d) & 0x3fffff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
+ " | (((%s + %d) >> 10) & 0x3fffff);\n",
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
name, addend);
break;
case R_SPARC_LO10:
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3ff) "
" | ((%s + %d) & 0x3ff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
name, addend);
break;
case R_SPARC_WDISP30:
" *(uint32_t *)(gen_code_ptr + %d) = "
"((*(uint32_t *)(gen_code_ptr + %d)) "
" & ~0x3fffffff) "
- " | ((((%s + %d) - (long)gen_code_ptr)>>2) "
+ " | ((((%s + %d) - (long)(gen_code_ptr + %d))>>2) "
" & 0x3fffffff);\n",
- rel->r_offset - offset,
- rel->r_offset - offset,
- name, addend);
+ rel->r_offset - start_offset,
+ rel->r_offset - start_offset,
+ name, addend,
+ rel->r_offset - start_offset);
break;
default:
error("unsupported sparc64 relocation (%d)", type);
" const uint32_t *opparam_ptr;\n"
" gen_code_ptr = gen_code_buf;\n"
" opc_ptr = opc_buf;\n"
-" opparam_ptr = opparam_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"
" switch(*opc_ptr++) {\n"
);
" the_end:\n"
);
-/* generate a return */
+/* generate epilogue */
switch(ELF_ARCH) {
case EM_386:
fprintf(outfile, "*gen_code_ptr++ = 0xc3; /* ret */\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");
+ break;
case EM_SPARCV9:
- /* Fill the delay slot. */
- fprintf(outfile, "*((uint32_t *)gen_code_ptr) = *((uint32_t *)gen_code_ptr - 1); /* delay slot */\n");
- fprintf(outfile, "*((uint32_t *)gen_code_ptr - 1) = 0x81c3e008; /* retl */\n");
- fprintf(outfile, "gen_code_ptr++;\n");
+ fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81c7e008; /* ret */\n");
+ fprintf(outfile, "*((uint32_t *)gen_code_ptr)++ = 0x81e80000; /* restore */\n");
break;
default:
error("unknown ELF architecture");
projects / qemu.git / blobdiff