diff options
Diffstat (limited to 'arch/mips/include/asm/stackframe.h')
| -rw-r--r-- | arch/mips/include/asm/stackframe.h | 280 |
1 files changed, 168 insertions, 112 deletions
diff --git a/arch/mips/include/asm/stackframe.h b/arch/mips/include/asm/stackframe.h index eaa5a4d7d5e5..5d3563c55e0c 100644 --- a/arch/mips/include/asm/stackframe.h +++ b/arch/mips/include/asm/stackframe.h @@ -19,20 +19,43 @@ #include <asm/asm-offsets.h> #include <asm/thread_info.h> +/* Make the addition of cfi info a little easier. */ + .macro cfi_rel_offset reg offset=0 docfi=0 + .if \docfi + .cfi_rel_offset \reg, \offset + .endif + .endm + + .macro cfi_st reg offset=0 docfi=0 + LONG_S \reg, \offset(sp) + cfi_rel_offset \reg, \offset, \docfi + .endm + + .macro cfi_restore reg offset=0 docfi=0 + .if \docfi + .cfi_restore \reg + .endif + .endm + + .macro cfi_ld reg offset=0 docfi=0 + LONG_L \reg, \offset(sp) + cfi_restore \reg \offset \docfi + .endm + #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) #define STATMASK 0x3f #else #define STATMASK 0x1f #endif - .macro SAVE_AT + .macro SAVE_AT docfi=0 .set push .set noat - LONG_S $1, PT_R1(sp) + cfi_st $1, PT_R1, \docfi .set pop .endm - .macro SAVE_TEMP + .macro SAVE_TEMP docfi=0 #ifdef CONFIG_CPU_HAS_SMARTMIPS mflhxu v1 LONG_S v1, PT_LO(sp) @@ -44,20 +67,20 @@ mfhi v1 #endif #ifdef CONFIG_32BIT - LONG_S $8, PT_R8(sp) - LONG_S $9, PT_R9(sp) + cfi_st $8, PT_R8, \docfi + cfi_st $9, PT_R9, \docfi #endif - LONG_S $10, PT_R10(sp) - LONG_S $11, PT_R11(sp) - LONG_S $12, PT_R12(sp) + cfi_st $10, PT_R10, \docfi + cfi_st $11, PT_R11, \docfi + cfi_st $12, PT_R12, \docfi #if !defined(CONFIG_CPU_HAS_SMARTMIPS) && !defined(CONFIG_CPU_MIPSR6) LONG_S v1, PT_HI(sp) mflo v1 #endif - LONG_S $13, PT_R13(sp) - LONG_S $14, PT_R14(sp) - LONG_S $15, PT_R15(sp) - LONG_S $24, PT_R24(sp) + cfi_st $13, PT_R13, \docfi + cfi_st $14, PT_R14, \docfi + cfi_st $15, PT_R15, \docfi + cfi_st $24, PT_R24, \docfi #if !defined(CONFIG_CPU_HAS_SMARTMIPS) && !defined(CONFIG_CPU_MIPSR6) LONG_S v1, PT_LO(sp) #endif @@ -71,20 +94,28 @@ #endif .endm - .macro SAVE_STATIC - LONG_S $16, PT_R16(sp) - LONG_S $17, PT_R17(sp) - LONG_S $18, PT_R18(sp) - LONG_S $19, PT_R19(sp) - LONG_S $20, PT_R20(sp) - LONG_S $21, PT_R21(sp) - LONG_S $22, PT_R22(sp) - LONG_S $23, PT_R23(sp) - LONG_S $30, PT_R30(sp) + .macro SAVE_STATIC docfi=0 + cfi_st $16, PT_R16, \docfi + cfi_st $17, PT_R17, \docfi + cfi_st $18, PT_R18, \docfi + cfi_st $19, PT_R19, \docfi + cfi_st $20, PT_R20, \docfi + cfi_st $21, PT_R21, \docfi + cfi_st $22, PT_R22, \docfi + cfi_st $23, PT_R23, \docfi + cfi_st $30, PT_R30, \docfi .endm +/* + * get_saved_sp returns the SP for the current CPU by looking in the + * kernelsp array for it. If tosp is set, it stores the current sp in + * k0 and loads the new value in sp. If not, it clobbers k0 and + * stores the new value in k1, leaving sp unaffected. + */ #ifdef CONFIG_SMP - .macro get_saved_sp /* SMP variation */ + + /* SMP variation */ + .macro get_saved_sp docfi=0 tosp=0 ASM_CPUID_MFC0 k0, ASM_SMP_CPUID_REG #if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32) lui k1, %hi(kernelsp) @@ -97,7 +128,15 @@ #endif LONG_SRL k0, SMP_CPUID_PTRSHIFT LONG_ADDU k1, k0 + .if \tosp + move k0, sp + .if \docfi + .cfi_register sp, k0 + .endif + LONG_L sp, %lo(kernelsp)(k1) + .else LONG_L k1, %lo(kernelsp)(k1) + .endif .endm .macro set_saved_sp stackp temp temp2 @@ -106,7 +145,8 @@ LONG_S \stackp, kernelsp(\temp) .endm #else /* !CONFIG_SMP */ - .macro get_saved_sp /* Uniprocessor variation */ + /* Uniprocessor variation */ + .macro get_saved_sp docfi=0 tosp=0 #ifdef CONFIG_CPU_JUMP_WORKAROUNDS /* * Clear BTB (branch target buffer), forbid RAS (return address @@ -135,7 +175,15 @@ daddiu k1, %hi(kernelsp) dsll k1, k1, 16 #endif + .if \tosp + move k0, sp + .if \docfi + .cfi_register sp, k0 + .endif + LONG_L sp, %lo(kernelsp)(k1) + .else LONG_L k1, %lo(kernelsp)(k1) + .endif .endm .macro set_saved_sp stackp temp temp2 @@ -143,7 +191,7 @@ .endm #endif - .macro SAVE_SOME + .macro SAVE_SOME docfi=0 .set push .set noat .set reorder @@ -151,7 +199,6 @@ sll k0, 3 /* extract cu0 bit */ .set noreorder bltz k0, 8f - move k1, sp #ifdef CONFIG_EVA /* * Flush interAptiv's Return Prediction Stack (RPS) by writing @@ -178,20 +225,26 @@ MTC0 k0, CP0_ENTRYHI #endif .set reorder + move k0, sp + .if \docfi + .cfi_register sp, k0 + .endif /* Called from user mode, new stack. */ - get_saved_sp -#ifndef CONFIG_CPU_DADDI_WORKAROUNDS -8: move k0, sp - PTR_SUBU sp, k1, PT_SIZE -#else - .set at=k0 -8: PTR_SUBU k1, PT_SIZE + get_saved_sp docfi=\docfi tosp=1 +8: +#ifdef CONFIG_CPU_DADDI_WORKAROUNDS + .set at=k1 +#endif + PTR_SUBU sp, PT_SIZE +#ifdef CONFIG_CPU_DADDI_WORKAROUNDS .set noat - move k0, sp - move sp, k1 #endif - LONG_S k0, PT_R29(sp) - LONG_S $3, PT_R3(sp) + .if \docfi + .cfi_def_cfa sp,0 + .endif + cfi_st k0, PT_R29, \docfi + cfi_rel_offset sp, PT_R29, \docfi + cfi_st v1, PT_R3, \docfi /* * You might think that you don't need to save $0, * but the FPU emulator and gdb remote debug stub @@ -199,23 +252,26 @@ */ LONG_S $0, PT_R0(sp) mfc0 v1, CP0_STATUS - LONG_S $2, PT_R2(sp) + cfi_st v0, PT_R2, \docfi LONG_S v1, PT_STATUS(sp) - LONG_S $4, PT_R4(sp) + cfi_st $4, PT_R4, \docfi mfc0 v1, CP0_CAUSE - LONG_S $5, PT_R5(sp) + cfi_st $5, PT_R5, \docfi LONG_S v1, PT_CAUSE(sp) - LONG_S $6, PT_R6(sp) - MFC0 v1, CP0_EPC - LONG_S $7, PT_R7(sp) + cfi_st $6, PT_R6, \docfi + cfi_st ra, PT_R31, \docfi + MFC0 ra, CP0_EPC + cfi_st $7, PT_R7, \docfi #ifdef CONFIG_64BIT - LONG_S $8, PT_R8(sp) - LONG_S $9, PT_R9(sp) + cfi_st $8, PT_R8, \docfi + cfi_st $9, PT_R9, \docfi #endif - LONG_S v1, PT_EPC(sp) - LONG_S $25, PT_R25(sp) - LONG_S $28, PT_R28(sp) - LONG_S $31, PT_R31(sp) + LONG_S ra, PT_EPC(sp) + .if \docfi + .cfi_rel_offset ra, PT_EPC + .endif + cfi_st $25, PT_R25, \docfi + cfi_st $28, PT_R28, \docfi /* Set thread_info if we're coming from user mode */ mfc0 k0, CP0_STATUS @@ -232,21 +288,21 @@ .set pop .endm - .macro SAVE_ALL - SAVE_SOME - SAVE_AT - SAVE_TEMP - SAVE_STATIC + .macro SAVE_ALL docfi=0 + SAVE_SOME \docfi + SAVE_AT \docfi + SAVE_TEMP \docfi + SAVE_STATIC \docfi .endm - .macro RESTORE_AT + .macro RESTORE_AT docfi=0 .set push .set noat - LONG_L $1, PT_R1(sp) + cfi_ld $1, PT_R1, \docfi .set pop .endm - .macro RESTORE_TEMP + .macro RESTORE_TEMP docfi=0 #ifdef CONFIG_CPU_CAVIUM_OCTEON /* Restore the Octeon multiplier state */ jal octeon_mult_restore @@ -265,33 +321,37 @@ mthi $24 #endif #ifdef CONFIG_32BIT - LONG_L $8, PT_R8(sp) - LONG_L $9, PT_R9(sp) + cfi_ld $8, PT_R8, \docfi + cfi_ld $9, PT_R9, \docfi #endif - LONG_L $10, PT_R10(sp) - LONG_L $11, PT_R11(sp) - LONG_L $12, PT_R12(sp) - LONG_L $13, PT_R13(sp) - LONG_L $14, PT_R14(sp) - LONG_L $15, PT_R15(sp) - LONG_L $24, PT_R24(sp) + cfi_ld $10, PT_R10, \docfi + cfi_ld $11, PT_R11, \docfi + cfi_ld $12, PT_R12, \docfi + cfi_ld $13, PT_R13, \docfi + cfi_ld $14, PT_R14, \docfi + cfi_ld $15, PT_R15, \docfi + cfi_ld $24, PT_R24, \docfi .endm - .macro RESTORE_STATIC - LONG_L $16, PT_R16(sp) - LONG_L $17, PT_R17(sp) - LONG_L $18, PT_R18(sp) - LONG_L $19, PT_R19(sp) - LONG_L $20, PT_R20(sp) - LONG_L $21, PT_R21(sp) - LONG_L $22, PT_R22(sp) - LONG_L $23, PT_R23(sp) - LONG_L $30, PT_R30(sp) + .macro RESTORE_STATIC docfi=0 + cfi_ld $16, PT_R16, \docfi + cfi_ld $17, PT_R17, \docfi + cfi_ld $18, PT_R18, \docfi + cfi_ld $19, PT_R19, \docfi + cfi_ld $20, PT_R20, \docfi + cfi_ld $21, PT_R21, \docfi + cfi_ld $22, PT_R22, \docfi + cfi_ld $23, PT_R23, \docfi + cfi_ld $30, PT_R30, \docfi + .endm + + .macro RESTORE_SP docfi=0 + cfi_ld sp, PT_R29, \docfi .endm #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX) - .macro RESTORE_SOME + .macro RESTORE_SOME docfi=0 .set push .set reorder .set noat @@ -306,30 +366,30 @@ and v0, v1 or v0, a0 mtc0 v0, CP0_STATUS - LONG_L $31, PT_R31(sp) - LONG_L $28, PT_R28(sp) - LONG_L $25, PT_R25(sp) - LONG_L $7, PT_R7(sp) - LONG_L $6, PT_R6(sp) - LONG_L $5, PT_R5(sp) - LONG_L $4, PT_R4(sp) - LONG_L $3, PT_R3(sp) - LONG_L $2, PT_R2(sp) + cfi_ld $31, PT_R31, \docfi + cfi_ld $28, PT_R28, \docfi + cfi_ld $25, PT_R25, \docfi + cfi_ld $7, PT_R7, \docfi + cfi_ld $6, PT_R6, \docfi + cfi_ld $5, PT_R5, \docfi + cfi_ld $4, PT_R4, \docfi + cfi_ld $3, PT_R3, \docfi + cfi_ld $2, PT_R2, \docfi .set pop .endm - .macro RESTORE_SP_AND_RET + .macro RESTORE_SP_AND_RET docfi=0 .set push .set noreorder LONG_L k0, PT_EPC(sp) - LONG_L sp, PT_R29(sp) + RESTORE_SP \docfi jr k0 rfe .set pop .endm #else - .macro RESTORE_SOME + .macro RESTORE_SOME docfi=0 .set push .set reorder .set noat @@ -346,24 +406,24 @@ mtc0 v0, CP0_STATUS LONG_L v1, PT_EPC(sp) MTC0 v1, CP0_EPC - LONG_L $31, PT_R31(sp) - LONG_L $28, PT_R28(sp) - LONG_L $25, PT_R25(sp) + cfi_ld $31, PT_R31, \docfi + cfi_ld $28, PT_R28, \docfi + cfi_ld $25, PT_R25, \docfi #ifdef CONFIG_64BIT - LONG_L $8, PT_R8(sp) - LONG_L $9, PT_R9(sp) + cfi_ld $8, PT_R8, \docfi + cfi_ld $9, PT_R9, \docfi #endif - LONG_L $7, PT_R7(sp) - LONG_L $6, PT_R6(sp) - LONG_L $5, PT_R5(sp) - LONG_L $4, PT_R4(sp) - LONG_L $3, PT_R3(sp) - LONG_L $2, PT_R2(sp) + cfi_ld $7, PT_R7, \docfi + cfi_ld $6, PT_R6, \docfi + cfi_ld $5, PT_R5, \docfi + cfi_ld $4, PT_R4, \docfi + cfi_ld $3, PT_R3, \docfi + cfi_ld $2, PT_R2, \docfi .set pop .endm - .macro RESTORE_SP_AND_RET - LONG_L sp, PT_R29(sp) + .macro RESTORE_SP_AND_RET docfi=0 + RESTORE_SP \docfi #ifdef CONFIG_CPU_MIPSR6 eretnc #else @@ -375,16 +435,12 @@ #endif - .macro RESTORE_SP - LONG_L sp, PT_R29(sp) - .endm - - .macro RESTORE_ALL - RESTORE_TEMP - RESTORE_STATIC - RESTORE_AT - RESTORE_SOME - RESTORE_SP + .macro RESTORE_ALL docfi=0 + RESTORE_TEMP \docfi + RESTORE_STATIC \docfi + RESTORE_AT \docfi + RESTORE_SOME \docfi + RESTORE_SP \docfi .endm /* |