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Relax the initial user stack alignment from 16 to 8 bytes. 

Add a workaround for what appears to be a bug in binutils whereby
the entry point of an SHmedia binary can sometimes specify
SHcompact code (LSB is clear).
This commit is contained in:
scw 2003-03-24 14:21:27 +00:00
parent 19e0b28415
commit 28db85d8f6
1 changed files with 12 additions and 2 deletions
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14
sys/arch/sh5/sh5/process_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: process_machdep.c,v 1.12 2003/03/13 13:44:19 scw Exp $ */
/* $NetBSD: process_machdep.c,v 1.13 2003/03/24 14:21:27 scw Exp $ */
/*
* Copyright 2002 Wasabi Systems, Inc.
@ -76,6 +76,16 @@ setregs(struct lwp *l, struct exec_package *pack, u_long stack)
tf->tf_state.sf_ssr = SH5_CONREG_SR_MMU;
tf->tf_state.sf_flags = SF_FLAGS_CALLEE_SAVED;
#ifdef SHMEDIA_ENTRY_POINT_HACK
if ((tf->tf_state.sf_spc & 3) == 0) {
#ifdef DIAGNOSTIC
printf("setregs: warning: non-SHmedia entry point for '%s'\n",
l->l_proc->p_comm);
#endif
tf->tf_state.sf_spc |= 1;
}
#endif
tf->tf_caller.r2 = (register_t) argc; /* argc */
tf->tf_caller.r3 = (register_t) (sstack + sizeof(long)); /* argv */
tf->tf_caller.r4 = (register_t) (sstack + ((argc + 2) * sizeof(long)));
@ -88,7 +98,7 @@ setregs(struct lwp *l, struct exec_package *pack, u_long stack)
tf->tf_caller.r7 = (register_t)(long)l->l_proc->p_psstr;
/* Align the stack as required by the SH-5 ABI */
tf->tf_caller.r15 = tf->tf_caller.r14 = (register_t) (sstack & ~0xf);
tf->tf_caller.r15 = tf->tf_caller.r14 = (register_t) (sstack & ~0x7);
/* Give the new process a clean set of FP regs */
memset(&l->l_addr->u_pcb.pcb_ctx.sf_fpregs, 0, sizeof(struct fpregs));