diff mbox series

powerpc/ptrace: Fix ptrace-hwbreak selftest failure

Message ID 5558d8c22ff0ed03cb5392798564dd203bd68501.1584787012.git.christophe.leroy@c-s.fr (mailing list archive)
State Accepted
Headers show
Series powerpc/ptrace: Fix ptrace-hwbreak selftest failure | expand

Checks

Context Check Description
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/merge (a87b93bdf800a4d7a42d95683624a4516e516b4f)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/next (59ed2adf393109c56d383e568f2e57bb5ad6d901)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linus/master (5ad0ec0b86525d0c5d3d250d3cfad7f183b00cfa)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch powerpc/fixes (1d0c32ec3b860a32df593a22bad0d1dbc5546a59)
snowpatch_ozlabs/apply_patch warning Failed to apply on branch linux-next (d8f289c16fbb72e17b783175c1fb0942816264fd)
snowpatch_ozlabs/apply_patch fail Failed to apply to any branch

Commit Message

Christophe Leroy March 21, 2020, 10:37 a.m. UTC 
Pieces of commit c3f68b0478e7 ("powerpc/watchpoint: Fix ptrace
code that muck around with address/len") disappeared with
commit 53387e67d003 ("powerpc/ptrace: split out ADV_DEBUG_REGS
related functions.").

Restore them.

Fixes: 53387e67d003 ("powerpc/ptrace: split out ADV_DEBUG_REGS related functions.")
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/ptrace/ptrace-noadv.c | 8 ++------
 1 file changed, 2 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/arch/powerpc/kernel/ptrace/ptrace-noadv.c b/arch/powerpc/kernel/ptrace/ptrace-noadv.c
index cf05fadba0d5..d4170932acb4 100644
--- a/arch/powerpc/kernel/ptrace/ptrace-noadv.c
+++ b/arch/powerpc/kernel/ptrace/ptrace-noadv.c
@@ -153,7 +153,7 @@  long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf
 	if ((unsigned long)bp_info->addr >= TASK_SIZE)
 		return -EIO;
 
-	brk.address = bp_info->addr & ~7UL;
+	brk.address = bp_info->addr & ~HW_BREAKPOINT_ALIGN;
 	brk.type = HW_BRK_TYPE_TRANSLATE;
 	brk.len = DABR_MAX_LEN;
 	if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_READ)
@@ -161,10 +161,6 @@  long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf
 	if (bp_info->trigger_type & PPC_BREAKPOINT_TRIGGER_WRITE)
 		brk.type |= HW_BRK_TYPE_WRITE;
 #ifdef CONFIG_HAVE_HW_BREAKPOINT
-	/*
-	 * Check if the request is for 'range' breakpoints. We can
-	 * support it if range < 8 bytes.
-	 */
 	if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE)
 		len = bp_info->addr2 - bp_info->addr;
 	else if (bp_info->addr_mode == PPC_BREAKPOINT_MODE_EXACT)
@@ -177,7 +173,7 @@  long ppc_set_hwdebug(struct task_struct *child, struct ppc_hw_breakpoint *bp_inf
 
 	/* Create a new breakpoint request if one doesn't exist already */
 	hw_breakpoint_init(&attr);
-	attr.bp_addr = (unsigned long)bp_info->addr & ~HW_BREAKPOINT_ALIGN;
+	attr.bp_addr = (unsigned long)bp_info->addr;
 	attr.bp_len = len;
 	arch_bp_generic_fields(brk.type, &attr.bp_type);