diff options
Diffstat (limited to 'libc/ports/sysdeps/mips/dl-trampoline.c')
| -rw-r--r-- | libc/ports/sysdeps/mips/dl-trampoline.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/libc/ports/sysdeps/mips/dl-trampoline.c b/libc/ports/sysdeps/mips/dl-trampoline.c index 57fb05b86..605e44e18 100644 --- a/libc/ports/sysdeps/mips/dl-trampoline.c +++ b/libc/ports/sysdeps/mips/dl-trampoline.c @@ -292,9 +292,11 @@ __dl_runtime_resolve (ElfW(Word) sym_index, #endif +#ifndef __mips16 asm ("\n\ .text\n\ .align 2\n\ + .set nomips16\n\ .globl _dl_runtime_resolve\n\ .type _dl_runtime_resolve,@function\n\ .ent _dl_runtime_resolve\n\ @@ -351,6 +353,7 @@ _dl_runtime_resolve:\n\ asm ("\n\ .text\n\ .align 2\n\ + .set nomips16\n\ .globl _dl_runtime_pltresolve\n\ .type _dl_runtime_pltresolve,@function\n\ .ent _dl_runtime_pltresolve\n\ @@ -381,3 +384,130 @@ _dl_runtime_pltresolve:\n\ .previous\n\ "); +#elif _MIPS_SIM == _ABIO32 /* __mips16 */ +/* MIPS16 version, O32 only. */ +asm ("\n\ + .text\n\ + .align 2\n\ + .set mips16\n\ + .globl _dl_runtime_resolve\n\ + .type _dl_runtime_resolve,@function\n\ + .ent _dl_runtime_resolve\n\ +_dl_runtime_resolve:\n\ + .frame $29, " STRINGXP (ELF_DL_FRAME_SIZE) ", $31\n\ + # Save arguments and sp value in stack.\n\t" +# if _MIPS_ISA >= _MIPS_ISA_MIPS32 + "save " STRINGXP (ELF_DL_FRAME_SIZE) ", $4-$7, $ra\n\t" +# else + "addiu $sp, -" STRINGXP (ELF_DL_FRAME_SIZE) "\n\ + sw $7, 32($sp)\n\ + sw $6, 28($sp)\n\ + sw $5, 24($sp)\n\ + sw $4, 20($sp)\n\t" +# endif + "# Preserve caller's $ra, for RESTORE instruction below.\n\ + move $5, $15\n\ + sw $5, 36($sp)\n\ + # Compute GP into $2.\n\ + li $2, %hi(_gp_disp)\n\ + addiu $3, $pc, %lo(_gp_disp)\n\ + sll $2, 16\n\ + addu $2, $3\n\ + lw $3, %got(__dl_runtime_resolve)($2)\n\ + move $4, $24\n\ + addiu $3, %lo(__dl_runtime_resolve)\n\ + move $7, $ra\n\ + move $6, $28\n\ + move $25, $3\n\ + jalr $3\n\t" +# if _MIPS_ISA >= _MIPS_ISA_MIPS32 + "restore " STRINGXP(ELF_DL_FRAME_SIZE) ", $4-$7, $ra\n\t" +# else + "# Restore $ra, move placed further down to hide latency.\n\ + lw $4, 36($sp)\n\ + lw $5, 24($sp)\n\ + lw $6, 28($sp)\n\ + lw $7, 32($sp)\n\ + move $ra, $4\n\ + lw $4, 20($sp)\n\ + addiu $sp, " STRINGXP(ELF_DL_FRAME_SIZE) "\n\t" +# endif + "move $25, $2\n\ + jr $2\n\ + .end _dl_runtime_resolve\n\ + .previous\n\ +"); + +asm ("\n\ + .text\n\ + .align 2\n\ + .set mips16\n\ + .globl _dl_runtime_pltresolve\n\ + .type _dl_runtime_pltresolve,@function\n\ + .ent _dl_runtime_pltresolve\n\ +_dl_runtime_pltresolve:\n\ + .frame $29, " STRINGXP(ELF_DL_PLT_FRAME_SIZE) ", $31\n\ + # Save arguments and sp value in stack.\n\t" +# if _MIPS_ISA >= _MIPS_ISA_MIPS32 + "save " STRINGXP(ELF_DL_PLT_FRAME_SIZE) ", $4-$7, $ra\n\t" +# else + "addiu $sp, -" STRINGXP(ELF_DL_PLT_FRAME_SIZE) "\n\ + sw $7, 40($sp)\n\ + sw $6, 36($sp)\n\ + sw $5, 32($sp)\n\ + sw $4, 28($sp)\n\t" +# endif + "# Preserve MIPS16 stub function arguments.\n\ + sw $3, 20($sp)\n\ + sw $2, 16($sp)\n\ + # Preserve caller's $ra, for RESTORE instruction below.\n\ + move $3, $15\n\ + sw $3, 44($sp)\n\ + # Compute GP into $2.\n\ + li $2, %hi(_gp_disp)\n\ + addiu $3, $pc, %lo(_gp_disp)\n\ + sll $2, 16\n\ + addu $2, $3\n\ + # Save GP value in slot.\n\ + sw $2, 24($sp)\n\ + # Load _dl_fixup address.\n\ + lw $6, %call16(_dl_fixup)($2)\n\ + # Load link map address.\n\ + move $3, $28\n\ + lw $4, " STRINGXP (PTRSIZE) "($3)\n\ + move $5, $24\n\ + sll $5, " STRINGXP (PTRLOG) " + 1\n\ + # Call _dl_fixup.\n\ + move $25, $6\n\ + jalr $6\n\ + move $25, $2\n\ + # Reload GP value into $28.\n\ + lw $3, 24($sp)\n\ + move $28, $3\n\ + lw $3, 16($sp)\n\ + move $15, $3\n\ + lw $3, 20($sp)\n\t" +# if _MIPS_ISA >= _MIPS_ISA_MIPS32 + "restore " STRINGXP (ELF_DL_PLT_FRAME_SIZE) ", $4-$7, $ra\n\t" +# else + "# Restore $ra, move placed further down to hide latency.\n\ + lw $4, 44($sp)\n\ + lw $5, 32($sp)\n\ + lw $6, 36($sp)\n\ + lw $7, 40($sp)\n\ + move $ra, $4\n\ + lw $4, 28($sp)\n\ + addiu $sp, " STRINGXP (ELF_DL_PLT_FRAME_SIZE) "\n\t" +# endif + ".set noreorder\n\ + jr $2\n\ + move $2, $15\n\ + .set reorder\n\ + .end _dl_runtime_pltresolve\n\ + .previous\n\ +"); + +#else /* __mips16 && _MIPS_SIM != _ABIO32 */ +# error "MIPS16 support for N32/N64 not implemented" + +#endif /* __mips16 */ |