NetBoot/vasm-1/elf_reloc_jag.h
2020-06-20 09:33:04 +08:00

87 lines
2.8 KiB
C

/* elf_reloc_jag.h ELF relocation types for Jaguar RISC */
/* (c) in 2015 by Frank Wille */
#define R_JAG_NONE 0 /* No reloc */
#define R_JAG_ABS32 1 /* Direct 32 bit */
#define R_JAG_ABS16 2 /* Direct 16 bit */
#define R_JAG_ABS8 3 /* Direct 8 bit */
#define R_JAG_REL32 4 /* PC relative 32 bit */
#define R_JAG_REL16 5 /* PC relative 16 bit */
#define R_JAG_REL8 6 /* PC relative 8 bit */
#define R_JAG_ABS5 7 /* Direct 5 bit */
#define R_JAG_REL5 8 /* PC relative 5 bit */
#define R_JAG_JR 9 /* PC relative branch (distance / 2), 5 bit */
#define R_JAG_ABS32SWP 10 /* 32 bit direct, halfwords swapped as in MOVEI */
#define R_JAG_REL32SWP 11 /* 32 bit PC rel., halfwords swapped as in MOVEI */
#define RFLD(p,s) (BIGENDIAN?(size==(s)&&(pos&15)==(p)):(size==(s)&&(pos&15)==(16-(p)-(s))))
if ((*rl)->type <= LAST_STANDARD_RELOC) {
nreloc *r = (nreloc *)(*rl)->reloc;
*refsym = r->sym;
*addend = r->addend;
pos = r->bitoffset;
size = r->size;
*roffset = r->byteoffset;
mask = r->mask;
switch ((*rl)->type) {
case REL_ABS:
if (pos==0 && mask==~0) {
if (size == 32)
t = R_JAG_ABS32;
else if (size == 16)
t = R_JAG_ABS16;
else if (size == 8)
t = R_JAG_ABS8;
}
else if (RFLD(6,5) && mask==0x1f)
t = R_JAG_ABS5;
else if (RFLD(0,16) && (mask==0xffff || mask==0xffff0000)
&& (rl2=(*rl)->next)!=NULL
&& (*rl)->type==(*rl)->next->type) {
nreloc *r2 = (nreloc *)rl2->reloc;
if ((mask==0xffff0000 && r2->mask==0xffff && r2->size==16
&& r2->bitoffset==0) ||
(mask==0xffff && r2->mask==0xffff0000 && r2->size==16
&& r2->bitoffset==16)) {
t = R_JAG_ABS32SWP;
*rl = (*rl)->next;
}
}
break;
case REL_PC:
if (pos==0 && mask==~0) {
if (size == 32)
t = R_JAG_REL32;
else if (size == 16)
t = R_JAG_REL16;
else if (size == 8)
t = R_JAG_REL8;
}
else if (RFLD(6,5) && mask==0x1f)
t = R_JAG_REL5;
else if (RFLD(6,5) && mask==0x3e)
t = R_JAG_JR;
else if (RFLD(0,16) && (mask==0xffff || mask==0xffff0000)
&& (rl2=(*rl)->next)!=NULL
&& (*rl)->type==(*rl)->next->type) {
nreloc *r2 = (nreloc *)rl2->reloc;
if ((mask==0xffff0000 && r2->mask==0xffff && r2->size==16
&& r2->bitoffset==0) ||
(mask==0xffff && r2->mask==0xffff0000 && r2->size==16
&& r2->bitoffset==16)) {
t = R_JAG_REL32SWP;
*rl = (*rl)->next;
}
}
break;
}
}
#undef RFLD