diff options
Diffstat (limited to 'cpukit/libdl/rtl-mdreloc-mips.c')
| -rw-r--r-- | cpukit/libdl/rtl-mdreloc-mips.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/cpukit/libdl/rtl-mdreloc-mips.c b/cpukit/libdl/rtl-mdreloc-mips.c new file mode 100644 index 0000000000..ea9989a475 --- /dev/null +++ b/cpukit/libdl/rtl-mdreloc-mips.c @@ -0,0 +1,190 @@ +#include <sys/cdefs.h> + +#include <errno.h> +#include <stdio.h> +#include <sys/types.h> +#include <sys/stat.h> + +#include <rtems/rtl/rtl.h> +#include "rtl-elf.h" +#include "rtl-error.h" +#include "rtl-trace.h" + +bool +rtems_rtl_elf_rel_resolve_sym (Elf_Word type) +{ + return true; +} + +bool +rtems_rtl_elf_relocate_rela (const rtems_rtl_obj_t* obj, + const Elf_Rela* rela, + const rtems_rtl_obj_sect_t* sect, + const char* symname, + const Elf_Byte syminfo, + const Elf_Word symvalue) +{ + rtems_rtl_set_error (EINVAL, "rela type record not supported"); + return false; +} + +/* + * 1. _gp_disp symbol are not considered in this file. + * 2. There is a local/external column; + * local corresponds to (STB_LOCAL & STT_SECTION) and + * all others are external. Because if the type of a + * symbol is STT_SECTION, it must be STB_LOCAL. Thus + * just consider symtype here. + */ +bool +rtems_rtl_elf_relocate_rel (const rtems_rtl_obj_t* obj, + const Elf_Rel* rel, + const rtems_rtl_obj_sect_t* sect, + const char* symname, + const Elf_Byte syminfo, + const Elf_Word symvalue) +{ + Elf_Addr *where; + Elf_Word tmp; + Elf_Word addend = (Elf_Word)0; + Elf_Word local = 0; + uint32_t t; + + + static Elf_Addr *where_hi16; + static Elf_Addr ahl; + + where = (Elf_Addr *)(sect->base + rel->r_offset); + addend = *where; + + if (syminfo == STT_SECTION) + local = 1; + + switch (ELF_R_TYPE(rel->r_info)) { + case R_TYPE(NONE): + break; + + case R_TYPE(16): + tmp = addend & 0xffff; + if ((tmp & 0x8000) == 0x8000) + tmp |= 0xffff0000; /* Sign extend */ + tmp = symvalue + (int)tmp; + if ((tmp & 0xffff0000) != 0) { + printf("R_MIPS_16 Overflow\n"); + return false; + } + + *where = (tmp & 0xffff) | (*where & 0xffff0000); + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_16 %p @ %p in %s\n", + (void *)*(where), where, rtems_rtl_obj_oname (obj)); + break; + + case R_TYPE(32): + tmp = symvalue + addend; + if (addend != tmp) + *where = tmp; + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_32 %p @ %p in %s\n", + (void *)*(where), where, rtems_rtl_obj_oname (obj)); + break; + + case R_TYPE(26): + + addend &= 0x03ffffff; + addend <<= 2; + + if (local == 1) { /* STB_LOCAL and STT_SECTION */ + tmp = symvalue + (((Elf_Addr)where & 0xf0000000) | addend); + tmp >>= 2; + + } else { /* external */ + + tmp = addend; + + if ((tmp & 0x08000000) == 0x08000000) + tmp |= 0xf0000000; /* Sign extened */ + tmp = ((int)tmp + symvalue) >> 2; + + } + + *where &= ~0x03ffffff; + *where |= tmp & 0x03ffffff; + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_26 local=%d %p @ %p in %s\n", + local, (void *)*(where), where, rtems_rtl_obj_oname (obj)); + break; + + case R_TYPE(HI16): + ahl = addend << 16; + where_hi16 = where; + + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_HI16 %p @ %p in %s\n", + (void *)*(where), where, rtems_rtl_obj_oname (obj)); + break; + + case R_TYPE(LO16): + //ahl += (int16_t)addend; + t = ahl + (int16_t)addend; + tmp = symvalue; + if (tmp == 0) + return false; + + addend &= 0xffff0000; + addend |= (uint16_t)(t + tmp); + *where = addend; + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf("*where %x where %x\n", *where, where); + + addend = *where_hi16; + addend &= 0xffff0000; + addend |= ((t + tmp) - (int16_t)(t + tmp)) >> 16; + *where_hi16 = addend; + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf("*where_hi %x where_hi %x\n", *where_hi16, where_hi16); + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_LO16 %p @ %p in %s\n", + (void *)*(where), where, rtems_rtl_obj_oname (obj)); + break; + + case R_TYPE(PC16): + tmp = addend & 0xffff; + if ((tmp & 0x8000) == 0x8000) + tmp |= 0xffff0000; /* Sign extend */ + tmp = symvalue + ((int)tmp*4) - (Elf_Addr)where; + tmp = (Elf_Sword)tmp >> 2; + if (((Elf_Sword)tmp > 0x7fff) || ((Elf_Sword)tmp < -0x8000)) { + printf("R_MIPS_PC16 Overflow\n"); + return false; + } + + *where = (tmp & 0xffff) | (*where & 0xffff0000); + + if (rtems_rtl_trace (RTEMS_RTL_TRACE_RELOC)) + printf ("rtl: R_MIPS_PC16 %p @ %p in %s\n", + (void *)*(where), where, rtems_rtl_obj_oname (obj)); + + break; + + default: + printf ("rtl: reloc unknown: sym = %lu, type = %lu, offset = %p, " + "contents = %p\n", + ELF_R_SYM(rel->r_info), (uint32_t) ELF_R_TYPE(rel->r_info), + (void *)rel->r_offset, (void *)*where); + rtems_rtl_set_error (EINVAL, + "%s: Unsupported relocation type %ld " + "in non-PLT relocations", + sect->name, (uint32_t) ELF_R_TYPE(rel->r_info)); + return false; + } + + return true; +} |