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https://github.com/freebsd/freebsd-src.git
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Kernel module support for mips.
Reviewed by: gonzo Tested by: Alexandr Rybalko (ray@dlink.ua)
This commit is contained in:
Neel Natu
parent
35873dcedb
commit
6f3c632700
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=204031
@ -203,11 +203,9 @@ LD += -EB
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.if ${MACHINE_ARCH} == "mips"
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. if defined(TARGET_BIG_ENDIAN)
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CFLAGS += -EB
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LDFLAGS += -Wl,-EB
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LD += -EB
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. else
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CFLAGS += -EL
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LDFLAGS += -Wl,-EL
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LD += -EL
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. endif
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CFLAGS += -msoft-float -G0 -mno-dsp -mabicalls
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@ -89,6 +89,8 @@ libkern/umoddi3.c optional isa_mips32
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#libkern/mips/strcmp.S standard
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#libkern/mips/strncmp.S standard
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kern/link_elf_obj.c standard
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dev/cfe/cfe_api.c optional cfe
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dev/cfe/cfe_console.c optional cfe_console
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dev/cfe/cfe_env.c optional cfe_env
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@ -128,6 +128,10 @@ CFLAGS+= -fno-omit-frame-pointer
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CFLAGS+= -mlongcall -fno-omit-frame-pointer
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.endif
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.if ${MACHINE_ARCH} == "mips"
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CFLAGS+= -G0 -fno-pic -mno-abicalls -mlong-calls
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.endif
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.if defined(FIRMWS)
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.if !exists(@)
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${KMOD:S/$/.c/}: @
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@ -174,7 +178,7 @@ ${PROG}.symbols: ${FULLPROG}
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${OBJCOPY} --only-keep-debug ${FULLPROG} ${.TARGET}
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.endif
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.if ${MACHINE_ARCH} != amd64
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.if ${MACHINE_ARCH} != amd64 && ${MACHINE_ARCH} != mips
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${FULLPROG}: ${KMOD}.kld
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${LD} -Bshareable ${LDFLAGS} -o ${.TARGET} ${KMOD}.kld
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.if !defined(DEBUG_FLAGS)
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@ -187,7 +191,7 @@ EXPORT_SYMS?= NO
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CLEANFILES+= export_syms
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.endif
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.if ${MACHINE_ARCH} != amd64
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.if ${MACHINE_ARCH} != amd64 && ${MACHINE_ARCH} != mips
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${KMOD}.kld: ${OBJS}
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.else
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${FULLPROG}: ${OBJS}
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@ -206,7 +210,8 @@ ${FULLPROG}: ${OBJS}
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export_syms | xargs -J% ${OBJCOPY} % ${.TARGET}
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.endif
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.endif
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.if !defined(DEBUG_FLAGS) && ${MACHINE_ARCH} == amd64
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.if !defined(DEBUG_FLAGS) && \
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(${MACHINE_ARCH} == amd64 || ${MACHINE_ARCH} == mips)
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${OBJCOPY} --strip-debug ${.TARGET}
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.endif
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@ -853,8 +853,8 @@ link_elf_load_file(linker_class_t cls, const char *filename,
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panic("lost relatab");
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if (mapbase != (vm_offset_t)ef->address + mapsize)
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panic("mapbase 0x%lx != address %p + mapsize 0x%lx (0x%lx)\n",
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mapbase, ef->address, mapsize,
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(vm_offset_t)ef->address + mapsize);
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(u_long)mapbase, ef->address, (u_long)mapsize,
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(u_long)(vm_offset_t)ef->address + mapsize);
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/* Local intra-module relocations */
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link_elf_reloc_local(lf);
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@ -46,6 +46,7 @@ __FBSDID("$FreeBSD$");
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#include <machine/elf.h>
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#include <machine/md_var.h>
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#include <machine/cache.h>
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#ifdef __mips_n64
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struct sysentvec elf64_freebsd_sysvec = {
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@ -163,7 +164,12 @@ elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
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Elf_Addr addend = (Elf_Addr)0;
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Elf_Word rtype = (Elf_Word)0, symidx;
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const Elf_Rel *rel;
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const Elf_Rela *rela;
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/*
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* Stash R_MIPS_HI16 info so we can use it when processing R_MIPS_LO16
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*/
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static Elf_Addr ahl;
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static Elf_Addr *where_hi16;
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switch (type) {
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case ELF_RELOC_REL:
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@ -173,102 +179,57 @@ elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data,
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rtype = ELF_R_TYPE(rel->r_info);
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symidx = ELF_R_SYM(rel->r_info);
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break;
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case ELF_RELOC_RELA:
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rela = (const Elf_Rela *)data;
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where = (Elf_Addr *) (relocbase + rela->r_offset);
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addend = rela->r_addend;
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rtype = ELF_R_TYPE(rela->r_info);
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symidx = ELF_R_SYM(rela->r_info);
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break;
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default:
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panic("unknown reloc type %d\n", type);
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}
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if (local) {
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#if 0 /* TBD */
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if (rtype == R_386_RELATIVE) { /* A + B */
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addr = elf_relocaddr(lf, relocbase + addend);
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if (*where != addr)
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*where = addr;
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}
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return (0);
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#endif
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}
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switch (rtype) {
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case R_MIPS_NONE: /* none */
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break;
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case R_MIPS_16: /* S + sign-extend(A) */
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/*
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* There shouldn't be R_MIPS_16 relocs in kernel objects.
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*/
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printf("kldload: unexpected R_MIPS_16 relocation\n");
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return -1;
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break;
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case R_MIPS_32: /* S + A - P */
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case R_MIPS_32: /* S + A */
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addr = lookup(lf, symidx, 1);
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if (addr == 0)
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return -1;
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return (-1);
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addr += addend;
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if (*where != addr)
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*where = addr;
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break;
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case R_MIPS_REL32: /* A - EA + S */
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/*
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* There shouldn't be R_MIPS_REL32 relocs in kernel objects?
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*/
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printf("kldload: unexpected R_MIPS_REL32 relocation\n");
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return -1;
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break;
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case R_MIPS_26: /* ((A << 2) | (P & 0xf0000000) + S) >> 2 */
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addr = lookup(lf, symidx, 1);
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if (addr == 0)
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return (-1);
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addend &= 0x03ffffff;
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addend <<= 2;
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addr += ((Elf_Addr)where & 0xf0000000) | addend;
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addr >>= 2;
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*where &= ~0x03ffffff;
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*where |= addr & 0x03ffffff;
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break;
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case R_MIPS_HI16:
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/* extern/local: ((AHL + S) - ((short)(AHL + S)) >> 16 */
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/* _gp_disp: ((AHL + GP - P) - (short)(AHL + GP - P)) >> 16 */
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case R_MIPS_HI16: /* ((AHL + S) - ((short)(AHL + S)) >> 16 */
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ahl = addend << 16;
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where_hi16 = where;
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break;
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case R_MIPS_LO16:
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/* extern/local: AHL + S */
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/* _gp_disp: AHL + GP - P + 4 */
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break;
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case R_MIPS_LO16: /* AHL + S */
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ahl += (int16_t)addend;
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addr = lookup(lf, symidx, 1);
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if (addr == 0)
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return (-1);
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case R_MIPS_GPREL16:
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/* extern/local: ((AHL + S) - ((short)(AHL + S)) >> 16 */
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/* _gp_disp: ((AHL + GP - P) - (short)(AHL + GP - P)) >> 16 */
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break;
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addend &= 0xffff0000;
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addend |= (uint16_t)(ahl + addr);
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*where = addend;
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case R_MIPS_LITERAL: /* sign-extend(A) + L */
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break;
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case R_MIPS_GOT16: /* external: G */
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/* local: tbd */
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break;
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case R_MIPS_PC16: /* sign-extend(A) + S - P */
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break;
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case R_MIPS_CALL16: /* G */
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break;
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case R_MIPS_GPREL32: /* A + S + GP0 - GP */
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break;
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case R_MIPS_GOTHI16: /* (G - (short)G) >> 16 + A */
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break;
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case R_MIPS_GOTLO16: /* G & 0xffff */
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break;
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case R_MIPS_CALLHI16: /* (G - (short)G) >> 16 + A */
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break;
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case R_MIPS_CALLLO16: /* G & 0xffff */
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addend = *where_hi16;
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addend &= 0xffff0000;
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addend |= ((ahl + addr) - (int16_t)(ahl + addr)) >> 16;
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*where_hi16 = addend;
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break;
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default:
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@ -299,6 +260,11 @@ int
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elf_cpu_load_file(linker_file_t lf __unused)
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{
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/*
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* Sync the I and D caches to make sure our relocations are visible.
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*/
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mips_icache_sync_all();
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return (0);
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}
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