From: Jordan Niethe <jniethe5@gmail•com>
To: linuxppc-dev@lists•ozlabs.org
Cc: alistair@popple•id.au, npiggin@gmail•com, bala24@linux•ibm.com,
Jordan Niethe <jniethe5@gmail•com>,
dja@axtens•net
Subject: [PATCH v4 01/16] powerpc/xmon: Remove store_inst() for patch_instruction()
Date: Fri, 20 Mar 2020 16:17:54 +1100 [thread overview]
Message-ID: <20200320051809.24332-2-jniethe5@gmail.com> (raw)
In-Reply-To: <20200320051809.24332-1-jniethe5@gmail.com>
For modifying instructions in xmon, patch_instruction() can serve the
same role that store_inst() is performing with the advantage of not
being specific to xmon. In some places patch_instruction() is already
being using followed by store_inst(). In these cases just remove the
store_inst(). Otherwise replace store_inst() with patch_instruction().
Signed-off-by: Jordan Niethe <jniethe5@gmail•com>
---
v4: Read into a local variable
---
arch/powerpc/xmon/xmon.c | 18 +++++-------------
1 file changed, 5 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index e8c84d265602..02e3bd62cab4 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -325,11 +325,6 @@ static inline void sync(void)
asm volatile("sync; isync");
}
-static inline void store_inst(void *p)
-{
- asm volatile ("dcbst 0,%0; sync; icbi 0,%0; isync" : : "r" (p));
-}
-
static inline void cflush(void *p)
{
asm volatile ("dcbf 0,%0; icbi 0,%0" : : "r" (p));
@@ -881,8 +876,7 @@ static struct bpt *new_breakpoint(unsigned long a)
for (bp = bpts; bp < &bpts[NBPTS]; ++bp) {
if (!bp->enabled && atomic_read(&bp->ref_count) == 0) {
bp->address = a;
- bp->instr[1] = bpinstr;
- store_inst(&bp->instr[1]);
+ patch_instruction(&bp->instr[1], bpinstr);
return bp;
}
}
@@ -894,25 +888,26 @@ static struct bpt *new_breakpoint(unsigned long a)
static void insert_bpts(void)
{
int i;
+ unsigned int instr;
struct bpt *bp;
bp = bpts;
for (i = 0; i < NBPTS; ++i, ++bp) {
if ((bp->enabled & (BP_TRAP|BP_CIABR)) == 0)
continue;
- if (mread(bp->address, &bp->instr[0], 4) != 4) {
+ if (mread(bp->address, &instr, 4) != 4) {
printf("Couldn't read instruction at %lx, "
"disabling breakpoint there\n", bp->address);
bp->enabled = 0;
continue;
}
- if (IS_MTMSRD(bp->instr[0]) || IS_RFID(bp->instr[0])) {
+ if (IS_MTMSRD(instr) || IS_RFID(instr)) {
printf("Breakpoint at %lx is on an mtmsrd or rfid "
"instruction, disabling it\n", bp->address);
bp->enabled = 0;
continue;
}
- store_inst(&bp->instr[0]);
+ patch_instruction(bp->instr, instr);
if (bp->enabled & BP_CIABR)
continue;
if (patch_instruction((unsigned int *)bp->address,
@@ -922,7 +917,6 @@ static void insert_bpts(void)
bp->enabled &= ~BP_TRAP;
continue;
}
- store_inst((void *)bp->address);
}
}
@@ -957,8 +951,6 @@ static void remove_bpts(void)
(unsigned int *)bp->address, bp->instr[0]) != 0)
printf("Couldn't remove breakpoint at %lx\n",
bp->address);
- else
- store_inst((void *)bp->address);
}
}
--
2.17.1
next prev parent reply other threads:[~2020-03-20 5:22 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 5:17 [PATCH v4 00/16] Initial Prefixed Instruction support Jordan Niethe
2020-03-20 5:17 ` Jordan Niethe [this message]
2020-03-23 6:19 ` [PATCH v4 01/16] powerpc/xmon: Remove store_inst() for patch_instruction() Nicholas Piggin
2020-03-20 5:17 ` [PATCH v4 02/16] xmon: Move out-of-line instructions to text section Jordan Niethe
2020-03-23 5:59 ` Balamuruhan S
2020-03-23 6:05 ` Balamuruhan S
2020-03-23 9:26 ` Jordan Niethe
2020-03-23 6:22 ` Nicholas Piggin
2020-03-20 5:17 ` [PATCH v4 03/16] powerpc: Use a datatype for instructions Jordan Niethe
2020-03-23 6:07 ` Balamuruhan S
2020-03-23 6:23 ` Nicholas Piggin
2020-03-23 9:28 ` Jordan Niethe
2020-03-23 9:51 ` Nicholas Piggin
2020-03-24 2:58 ` Michael Ellerman
2020-03-24 3:21 ` Jordan Niethe
2020-04-01 10:32 ` Balamuruhan S
2020-04-01 23:52 ` Jordan Niethe
2020-04-02 23:44 ` Alistair Popple
2020-04-03 0:09 ` Jordan Niethe
2020-03-20 5:17 ` [PATCH v4 04/16] powerpc: Use a macro for creating instructions from u32s Jordan Niethe
2020-03-23 6:26 ` Nicholas Piggin
2020-03-23 9:29 ` Jordan Niethe
2020-03-20 5:17 ` [PATCH v4 05/16] powerpc: Use a function for masking instructions Jordan Niethe
2020-03-23 6:37 ` Nicholas Piggin
2020-03-23 9:31 ` Jordan Niethe
2020-03-20 5:17 ` [PATCH v4 06/16] powerpc: Use a function for getting the instruction op code Jordan Niethe
2020-03-23 6:54 ` Balamuruhan S
2020-03-23 9:35 ` Jordan Niethe
2020-03-20 5:18 ` [PATCH v4 07/16] powerpc: Introduce functions for instruction nullity and equality Jordan Niethe
2020-03-23 6:43 ` Nicholas Piggin
2020-03-23 9:31 ` Jordan Niethe
2020-03-20 5:18 ` [PATCH v4 08/16] powerpc: Use an accessor for word instructions Jordan Niethe
2020-03-23 11:12 ` Balamuruhan S
2020-03-24 3:18 ` Jordan Niethe
2020-03-24 6:22 ` Balamuruhan S
2020-03-20 5:18 ` [PATCH v4 09/16] powerpc: Use a function for reading instructions Jordan Niethe
2020-03-23 8:00 ` Nicholas Piggin
2020-03-23 8:43 ` Balamuruhan S
2020-03-23 10:09 ` Jordan Niethe
2020-03-23 10:36 ` Nicholas Piggin
2020-03-20 5:18 ` [PATCH v4 10/16] powerpc: Make test_translate_branch() independent of instruction length Jordan Niethe
2020-03-20 5:18 ` [PATCH v4 11/16] powerpc: Enable Prefixed Instructions Jordan Niethe
2020-03-23 7:02 ` Nicholas Piggin
2020-03-20 5:18 ` [PATCH v4 12/16] powerpc: Define new SRR1 bits for a future ISA version Jordan Niethe
2020-03-23 7:03 ` Nicholas Piggin
2020-03-20 5:18 ` [PATCH v4 13/16] powerpc: Support prefixed instructions in alignment handler Jordan Niethe
2020-03-23 7:05 ` Nicholas Piggin
2020-03-23 9:35 ` Jordan Niethe
2020-03-20 5:18 ` [PATCH v4 14/16] powerpc64: Add prefixed instructions to instruction data type Jordan Niethe
2020-03-23 6:58 ` Nicholas Piggin
2020-03-23 7:33 ` Nicholas Piggin
2020-03-23 23:45 ` Jordan Niethe
2020-03-24 5:40 ` Nicholas Piggin
2020-03-30 9:05 ` Alistair Popple
2020-03-30 9:13 ` Jordan Niethe
2020-03-20 5:18 ` [PATCH v4 15/16] powerpc sstep: Add support for prefixed load/stores Jordan Niethe
2020-03-23 8:54 ` Balamuruhan S
2020-03-20 5:18 ` [PATCH v4 16/16] powerpc sstep: Add support for prefixed fixed-point arithmetic Jordan Niethe
2020-03-23 10:05 ` Balamuruhan S
2020-03-23 6:18 ` [PATCH v4 00/16] Initial Prefixed Instruction support Nicholas Piggin
2020-03-23 9:25 ` Jordan Niethe
2020-03-23 10:17 ` Nicholas Piggin
2020-03-24 2:54 ` Jordan Niethe
2020-03-24 2:59 ` Jordan Niethe
2020-03-24 5:44 ` Nicholas Piggin
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