From mboxrd@z Thu Jan 1 00:00:00 1970 From: Takashi Yoshii Date: Wed, 06 Aug 2008 07:11:24 +0000 Subject: [PATCH] Add PLAT_FLAT_INIT Message-Id: <48994E9C.7030102@renesas.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-sh@vger.kernel.org This patch adds FLAT_PLAT_INIT macro which initialize registers of new process, same as ELF_PLAT_INIT does. It is needed because startup routine (crt1) expects r4 has meaningful value(even 0), though I can't find any ABI/specs around here. Anyway I believe registers has fixed value when a process starts. # BTW. Where fs/binfmt_flat.c patch should be sent to ? Signed-off-by: Takashi YOSHII --- arch/sh/include/asm/flat.h | 7 +++++++ fs/binfmt_flat.c | 4 +++- 2 files changed, 10 insertions(+), 1 deletions(-) diff --git a/arch/sh/include/asm/flat.h b/arch/sh/include/asm/flat.h index 0cc8002..d3b2b4f 100644 --- a/arch/sh/include/asm/flat.h +++ b/arch/sh/include/asm/flat.h @@ -21,4 +21,11 @@ #define flat_get_relocate_addr(rel) (rel) #define flat_set_persistent(relval, p) ({ (void)p; 0; }) +#define FLAT_PLAT_INIT(_r) \ + do { _r->regs[0]=0; _r->regs[1]=0; _r->regs[2]=0; _r->regs[3]=0; \ + _r->regs[4]=0; _r->regs[5]=0; _r->regs[6]=0; _r->regs[7]=0; \ + _r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \ + _r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \ + _r->sr = SR_FD; } while (0) + #endif /* __ASM_SH_FLAT_H */ diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c index c65d431..77ceae4 100644 --- a/fs/binfmt_flat.c +++ b/fs/binfmt_flat.c @@ -914,7 +914,9 @@ static int load_flat_binary(struct linux_binprm * bprm, struct pt_regs * regs) /* Stash our initial stack pointer into the mm structure */ current->mm->start_stack = (unsigned long )sp; - +#ifdef FLAT_PLAT_INIT + FLAT_PLAT_INIT(regs); +#endif DBG_FLT("start_thread(regs=0x%x, entry=0x%x, start_stack=0x%x)\n", (int)regs, (int)start_addr, (int)current->mm->start_stack); -- 1.5.4.5