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text relocation for arm

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This commit is contained in:
herman ten brugge 2021-01-05 19:46:43 +01:00
parent 81fec84012
commit a5865fab22
1 changed files with 77 additions and 28 deletions
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105
arm-gen.c
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@ -632,9 +632,24 @@ void load(int r, SValue *sv)
if (fr & VT_SYM || !op) {
o(0xE59F0000|(intr(r)<<12));
o(0xEA000000);
if(fr & VT_SYM)
greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
o(sv->c.i);
if(fr & VT_SYM) {
if (sv->sym->type.t & VT_STATIC) {
greloc(cur_text_section, sv->sym, ind, R_ARM_REL32);
o(sv->c.i - 12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add rx,rx,pc
}
else {
greloc(cur_text_section, sv->sym, ind, R_ARM_GOT_PREL);
o(-12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add rx,rx,pc
o(0xe5900000 | (intr(r)<<12) | (intr(r)<<16)); // ldr rx,[rx]
if (sv->c.i)
stuff_const_harder(0xe2800000 | (intr(r)<<12) | (intr(r)<<16),
sv->c.i);
}
}
else
o(sv->c.i);
} else
o(op);
return;
@ -643,9 +658,24 @@ void load(int r, SValue *sv)
if (fr & VT_SYM || !op) {
o(0xE59F0000|(intr(r)<<12));
o(0xEA000000);
if(fr & VT_SYM) // needed ?
greloc(cur_text_section, sv->sym, ind, R_ARM_ABS32);
o(sv->c.i);
if(fr & VT_SYM) {
if (sv->sym->type.t & VT_STATIC) {
greloc(cur_text_section, sv->sym, ind, R_ARM_REL32);
o(sv->c.i - 12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add rx,rx,pc
}
else {
greloc(cur_text_section, sv->sym, ind, R_ARM_GOT_PREL);
o(-12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add rx,rx,pc
o(0xe5900000 | (intr(r)<<12) | (intr(r)<<16)); // ldr rx,[rx]
if (sv->c.i)
stuff_const_harder(0xe2800000 | (intr(r)<<12) | (intr(r)<<16),
sv->c.i);
}
}
else
o(sv->c.i);
o(0xE08B0000|(intr(r)<<12)|intr(r));
} else
o(op);
@ -771,25 +801,41 @@ static void gcall_or_jmp(int is_jmp)
uint32_t x;
if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
/* constant case */
if(vtop->r & VT_SYM){
x=encbranch(ind,ind+vtop->c.i,0);
if(x) {
/* relocation case */
greloc(cur_text_section, vtop->sym, ind, R_ARM_PC24);
o(x|(is_jmp?0xE0000000:0xE1000000));
} else {
if(!is_jmp)
o(0xE28FE004); // add lr,pc,#4
o(0xE51FF004); // ldr pc,[pc,#-4]
greloc(cur_text_section, vtop->sym, ind, R_ARM_ABS32);
o(vtop->c.i);
}
}else{
if(!is_jmp)
o(0xE28FE004); // add lr,pc,#4
o(0xE51FF004); // ldr pc,[pc,#-4]
o(vtop->c.i);
if(vtop->r & VT_SYM){
x=encbranch(ind,ind+vtop->c.i,0);
if(x) {
/* relocation case */
greloc(cur_text_section, vtop->sym, ind, R_ARM_PC24);
o(x|(is_jmp?0xE0000000:0xE1000000));
} else {
r = TREG_LR;
o(0xE59F0000|(intr(r)<<12)); // ldr r,[pc]
o(0xEA000000); // b $+4
if (vtop->sym->type.t & VT_STATIC) {
greloc(cur_text_section, vtop->sym, ind, R_ARM_REL32);
o(vtop->c.i - 12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add rx,rx,pc
}
else {
greloc(cur_text_section, vtop->sym, ind, R_ARM_GOT_PREL);
o(-12);
o(0xe080000f | (intr(r)<<12) | (intr(r)<<16)); // add r,r,pc
o(0xe5900000 | (intr(r)<<12) | (intr(r)<<16)); // ldr r,[r]
if (vtop->c.i)
stuff_const_harder(0xe2800000 | (intr(r)<<12) | (intr(r)<<16),
vtop->c.i);
}
if(is_jmp)
o(0xE1A0F000 | intr(r)); // mov pc, r
else
o(0xe12fff30 | intr(r)); // blx r
}
}else{
if(!is_jmp)
o(0xE28FE004); // add lr,pc,#4
o(0xE51FF004); // ldr pc,[pc,#-4]
o(vtop->c.i);
}
} else {
/* otherwise, indirect call */
#ifdef CONFIG_TCC_BCHECK
@ -821,6 +867,7 @@ static void gen_bounds_prolog(void)
o(0xe1a00000); /* ld r0,lbounds_section->data_offset */
o(0xe1a00000);
o(0xe1a00000);
o(0xe1a00000);
o(0xe1a00000); /* call __bound_local_new */
}
@ -847,8 +894,9 @@ static void gen_bounds_epilog(void)
ind = func_bound_ind;
o(0xe59f0000); /* ldr r0, [pc] */
o(0xea000000); /* b $+4 */
greloc(cur_text_section, sym_data, ind, R_ARM_ABS32);
o(0x00000000); /* lbounds_section->data_offset */
greloc(cur_text_section, sym_data, ind, R_ARM_REL32);
o(-12); /* lbounds_section->data_offset */
o(0xe080000f); /* add r0,r0,pc */
gen_bounds_call(TOK___bound_local_new);
ind = saved_ind;
}
@ -858,8 +906,9 @@ static void gen_bounds_epilog(void)
o(0xed2d0b02); /* vpush {d0} */
o(0xe59f0000); /* ldr r0, [pc] */
o(0xea000000); /* b $+4 */
greloc(cur_text_section, sym_data, ind, R_ARM_ABS32);
o(0x00000000); /* lbounds_section->data_offset */
greloc(cur_text_section, sym_data, ind, R_ARM_REL32);
o(-12); /* lbounds_section->data_offset */
o(0xe080000f); /* add r0,r0,pc */
gen_bounds_call(TOK___bound_local_delete);
o(0xecbd0b02); /* vpop {d0} */
o(0xe8bd0003); /* pop {r0,r1} */