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Use R_AARCH64_MOVW_UABS_G* instead of R_AARCH64_CALL26.

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This is a work-around for TCC's linker, on AArch64, not building a PLT
when TCC is invoked with "-run". Fixing the linker should be possible:
it works on arm and x86_64, apparently.
This commit is contained in:
Edmund Grimley Evans 2016-10-11 18:56:10 +01:00
parent 7bd30a488a
commit 07ca2df588
1 changed files with 14 additions and 5 deletions
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19
arm64-gen.c
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@ -592,13 +592,22 @@ ST_FUNC void store(int r, SValue *sv)
static void arm64_gen_bl_or_b(int b)
{
// Currently TCC's linker does not generate a PLT when TCC is invoked
// with "-run". This means functions can be out of range if we try to
// call them in the usual way. Until the linker is fixed, work around
// this by using R_AARCH64_MOVW_UABS_G* relocations; see arm64_sym.
int avoid_call26 = 1;
if ((vtop->r & (VT_VALMASK | VT_LVAL)) == VT_CONST) {
assert(!b);
if (vtop->r & VT_SYM)
assert(!b && (vtop->r & VT_SYM));
if (avoid_call26) {
arm64_sym(30, vtop->sym, 0);
o(0xd63f03c0); // blr x30
}
else {
greloc(cur_text_section, vtop->sym, ind, R_AARCH64_CALL26);
else
assert(0);
o(0x94000000); // bl .
o(0x94000000); // bl .
}
}
else
o(0xd61f0000 | (uint32_t)!b << 21 | intr(gv(RC_R30)) << 5); // br/blr