diff options
| author | Ekaitz Zarraga <ekaitz@elenq.tech> | 2024-02-26 22:26:32 +0100 |
|---|---|---|
| committer | Ekaitz Zarraga <ekaitz@elenq.tech> | 2024-02-29 19:42:02 +0100 |
| commit | 7bc0cb5ba0d9c084cffd8db549f50025871614f0 (patch) | |
| tree | ea7a651a0aa44c0ea0dbd24d842e6baf641bdb82 | |
| parent | 2656f8edcce928c2ed74e18baa0b240e93649897 (diff) | |
riscv: Implement large addend for global address
| -rw-r--r-- | riscv64-gen.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/riscv64-gen.c b/riscv64-gen.c index 8a17b70..46971b1 100644 --- a/riscv64-gen.c +++ b/riscv64-gen.c @@ -166,7 +166,7 @@ ST_FUNC void gsym_addr(int t_, int a_) static int load_symofs(int r, SValue *sv, int forstore) { - int rr, doload = 0; + int rr, doload = 0, large_addend = 0; int fc = sv->c.i, v = sv->r & VT_VALMASK; if (sv->r & VT_SYM) { Sym label = {0}; @@ -176,8 +176,9 @@ static int load_symofs(int r, SValue *sv, int forstore) R_RISCV_PCREL_HI20, sv->c.i); sv->c.i = 0; } else { - if (((unsigned)fc + (1 << 11)) >> 12) - tcc_error("unimp: large addend for global address (0x%lx)", (long)sv->c.i); + if (((unsigned)fc + (1 << 11)) >> 12){ + large_addend = 1; + } greloca(cur_text_section, sv->sym, ind, R_RISCV_GOT_HI20, 0); doload = 1; @@ -192,6 +193,11 @@ static int load_symofs(int r, SValue *sv, int forstore) ? R_RISCV_PCREL_LO12_I : R_RISCV_PCREL_LO12_S, 0); if (doload) { EI(0x03, 3, rr, rr, 0); // ld RR, 0(RR) + if (large_addend) { + o(0x37 | (5 << 7) | ((0x800 + fc) & 0xfffff000)); //lui t0, high(fc) + ER(0x33, 0, rr, rr, 5, 0); // add RR, RR, t0 + sv->c.i = fc << 20 >> 20; + } } } else if (v == VT_LOCAL || v == VT_LLOCAL) { rr = 8; // s0 |