Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 175671e7 authored by Barry Song's avatar Barry Song Committed by Mike Frysinger
Browse files

Blackfin: ptrace: enable access to L1 stacks 



If an app is placing its stack in L1 scratchpad SRAM, make sure ptrace
is granted access to it so that gdb can do its thing.

Signed-off-by: default avatarBarry Song <barry.song@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent c5af5451

arch/blackfin/kernel/ptrace.c

+8 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <asm/fixed_code.h>

#include <asm/cacheflush.h>

#include <asm/mem_map.h>

#include <asm/mmu_context.h>



/*

 * does not yet catch signals sent when the child dies.
@@ -135,6 +136,13 @@ static inline int is_user_addr_valid(struct task_struct *child, 
	if (start >= FIXED_CODE_START && start + len < FIXED_CODE_END)

		return 0;



#ifdef CONFIG_APP_STACK_L1

	if (child->mm->context.l1_stack_save)

		if (start >= (unsigned long)l1_stack_base &&

			start + len < (unsigned long)l1_stack_base + l1_stack_len)

			return 0;

#endif



	return -EIO;

}