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This commit is contained in:
Rui Ueyama 2021-01-10 14:53:29 +09:00
parent ebc006abef
commit 540506d33c
1 changed files with 24 additions and 25 deletions
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49
input_sections.cc
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@ -34,31 +34,31 @@ static std::string rel_to_string(u32 r_type) {
unreachable();
}
static void overflow_check(std::ostringstream &out, u32 r_type, u64 val) {
static void overflow_check(std::ostringstream &out, u32 r_type, u8 *loc, u64 val) {
switch (r_type) {
case R_X86_64_8:
if (val != (u8)val)
out << "relocation R_X86_64_8 out of range: " << val << " is not in [0, 255]";
return;
break;
case R_X86_64_PC8:
if (val != (i8)val)
out << "relocation R_X86_64_PC8 out of range: " << (i64)val
<< " is not in [-128, 127]";
return;
break;
case R_X86_64_16:
if (val != (u16)val)
out << "relocation R_X86_64_16 out of range: " << val << " is not in [0, 65535]";
return;
break;
case R_X86_64_PC16:
if (val != (i16)val)
out << "relocation R_X86_64_PC16 out of range: " << (i64)val
<< " is not in [-32768, 32767]";
return;
break;
case R_X86_64_32:
if (val != (u32)val)
out << "relocation R_X86_64_32 out of range: " << val
<< " is not in [0, 4294967296]";
return;
break;
case R_X86_64_32S:
case R_X86_64_PC32:
case R_X86_64_GOT32:
@ -75,27 +75,30 @@ static void overflow_check(std::ostringstream &out, u32 r_type, u64 val) {
if (val != (i32)val)
out << "relocation " << rel_to_string(r_type) << " out of range: "
<< (i64)val << " is not in [-2147483648, 2147483647]";
return;
break;
case R_X86_64_NONE:
case R_X86_64_64:
case R_X86_64_PC64:
case R_X86_64_TPOFF64:
case R_X86_64_DTPOFF64:
return;
}
break;
default:
unreachable();
}
}
static int get_rel_size(u32 r_type) {
static void write_val(u32 r_type, u8 *loc, u64 val) {
switch (r_type) {
case R_X86_64_NONE:
return 0;
break;
case R_X86_64_8:
case R_X86_64_PC8:
return 1;
*loc = val;
break;
case R_X86_64_16:
case R_X86_64_PC16:
return 2;
*(u16 *)loc = val;
break;
case R_X86_64_32:
case R_X86_64_32S:
case R_X86_64_PC32:
@ -110,14 +113,17 @@ static int get_rel_size(u32 r_type) {
case R_X86_64_TPOFF32:
case R_X86_64_DTPOFF32:
case R_X86_64_GOTTPOFF:
return 4;
*(u32 *)loc = val;
break;
case R_X86_64_64:
case R_X86_64_PC64:
case R_X86_64_TPOFF64:
case R_X86_64_DTPOFF64:
return 8;
}
*(u64 *)loc = val;
break;
default:
unreachable();
}
}
void InputSection::copy_buf() {
@ -148,14 +154,8 @@ void InputSection::copy_buf() {
ref = &rel_pieces[ref_idx++];
auto write = [&](u64 val) {
overflow_check(file->err_out, rel.r_type, val);
switch (get_rel_size(rel.r_type)) {
case 1: *loc = val; return;
case 2: *(u16 *)loc = val; return;
case 4: *(u32 *)loc = val; return;
case 8: *(u64 *)loc = val; return;
}
unreachable();
overflow_check(file->err_out, rel.r_type, loc, val);
write_val(rel.r_type, loc, val);
};
#define S (ref ? ref->piece->get_addr() : sym.get_addr())
@ -172,7 +172,6 @@ void InputSection::copy_buf() {
write(S + A);
if (sym.needs_relative_rel()) {
assert(get_rel_size(rel.r_type) == 8);
memset(dynrel, 0, sizeof(*dynrel));
dynrel->r_offset = P;
dynrel->r_type = R_X86_64_RELATIVE;