diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2011-08-07 20:48:49 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2011-08-07 20:48:49 +0000 |
| commit | 237c529eeee6f122beb9685bca5bca2a10d1551f (patch) | |
| tree | 964d91b5b946269616fe3d9779fe433df6f10133 /sys/arch | |
| parent | ed881fe86261cb89acf9fc1b7f046152308af0f5 (diff) | |
Avoid clobbering system call arguments upon system call entry.
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/hppa64/hppa64/locore.S | 53 |
1 files changed, 28 insertions, 25 deletions
diff --git a/sys/arch/hppa64/hppa64/locore.S b/sys/arch/hppa64/hppa64/locore.S index 8e623949dbc..ba3af2d4be0 100644 --- a/sys/arch/hppa64/hppa64/locore.S +++ b/sys/arch/hppa64/hppa64/locore.S @@ -1,4 +1,4 @@ -/* $OpenBSD: locore.S,v 1.31 2011/07/08 22:26:43 kettenis Exp $ */ +/* $OpenBSD: locore.S,v 1.32 2011/08/07 20:48:48 kettenis Exp $ */ /* * Copyright (c) 2005 Michael Shalayeff @@ -400,14 +400,13 @@ $bsd_syscall mfctl %eiem, %ret1 mtctl %r0, %eiem mtsp %r0, %sr1 - mfctl %pidr1, %ret0 - ldi HPPA_PID_KERNEL, arg7 - mtctl arg7, %pidr1 + ldi HPPA_PID_KERNEL, %ret0 + mtctl %ret0, %pidr1 .import $syscall, code .call - ldil L%$syscall, arg7 - be R%$syscall(%sr1, arg7) + ldil L%$syscall, %ret0 + be R%$syscall(%sr1, %ret0) nop ! nop ! nop ! nop gateway_end @@ -417,7 +416,7 @@ gateway_end .export $syscall, entry $syscall - mfsp %sr0, arg7 + mfsp %sr0, %ret0 mtsp %r0, %sr0 mtsp %r0, %sr1 mtsp %r0, %sr2 @@ -426,31 +425,35 @@ $syscall mtsp %r0, %sr5 mtsp %r0, %sr6 mtsp %r0, %sr7 + mtctl %ret0, %cr28 + mtctl %ret1, %cr29 - copy %sp, arg6 + copy %sp, %ret1 - mfctl %cr24, %r9 - ldd CI_CURPROC(%r9), %r9 - ldd P_ADDR(%r9), %sp + mfctl %cr24, %ret0 + ldd CI_CURPROC(%ret0), %ret0 + ldd P_ADDR(%ret0), %sp ldo PAGE_SIZE-TRAPFRAME_SIZEOF(%sp), %sp - std %sp, P_MD_REGS(%r9) + std %sp, P_MD_REGS(%ret0) ldo TRAPFRAME_SIZEOF(%sp), %sp - std arg6, TF_SP-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR0-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR1-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR2-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR3-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR4-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR5-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_SR6-TRAPFRAME_SIZEOF(%sp) + std %ret1, TF_SP-TRAPFRAME_SIZEOF(%sp) + mfctl %cr28, %ret0 + mfctl %cr29, %ret1 + std %ret0, TF_SR0-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR1-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR2-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR3-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR4-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR5-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_SR6-TRAPFRAME_SIZEOF(%sp) std %r0, TF_SR7-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_IISQ-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_IISQ+8-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_IISQ-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_IISQ+8-TRAPFRAME_SIZEOF(%sp) - ldo 4(%r31), arg7 + ldo 4(%r31), %ret0 std %r31, TF_IIOQ-TRAPFRAME_SIZEOF(%sp) - std arg7, TF_IIOQ+8-TRAPFRAME_SIZEOF(%sp) + std %ret0, TF_IIOQ+8-TRAPFRAME_SIZEOF(%sp) std %r1, TF_R1-TRAPFRAME_SIZEOF(%sp) std %arg0, TF_ARGS+(0*8)-TRAPFRAME_SIZEOF(%sp) std %arg1, TF_ARGS+(1*8)-TRAPFRAME_SIZEOF(%sp) @@ -464,7 +467,7 @@ $syscall std %dp, TF_DP-TRAPFRAME_SIZEOF(%sp) mfctl %pidr2, arg7 - std %ret0, TF_PIDR1-TRAPFRAME_SIZEOF(%sp) + std arg7, TF_PIDR1-TRAPFRAME_SIZEOF(%sp) std arg7, TF_PIDR2-TRAPFRAME_SIZEOF(%sp) mfctl %sar, %arg2 |