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openrisc: Add support for more module relocations

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When testing modules in OpenRISC I found R_OR1K_AHI16 (signed adjusted
high 16-bit) and R_OR1K_SLO16 (split low 16-bit) relocations are used in
modules but not implemented yet.

This patch implements the relocations. I have tested with a few modules.

Signed-off-by: Stafford Horne <shorne@gmail.com>
This commit is contained in:
Stafford Horne 2024-04-11 17:23:25 +01:00
parent 26f53f2395
commit 23c6e901c7
1 changed files with 10 additions and 0 deletions
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10
arch/openrisc/kernel/module.c
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@ -55,6 +55,16 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
value |= *location & 0xfc000000;
*location = value;
break;
case R_OR1K_AHI16:
/* Adjust the operand to match with a signed LO16. */
value += 0x8000;
*((uint16_t *)location + 1) = value >> 16;
break;
case R_OR1K_SLO16:
/* Split value lower 16-bits. */
value = ((value & 0xf800) << 10) | (value & 0x7ff);
*location = (*location & ~0x3e007ff) | value;
break;
default:
pr_err("module %s: Unknown relocation: %u\n",
me->name, ELF32_R_TYPE(rel[i].r_info));