From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH 17/17] powerpc: remove STACK_FRAME_OVERHEAD
Date: Sun, 27 Nov 2022 22:49:42 +1000 [thread overview]
Message-ID: <20221127124942.1665522-18-npiggin@gmail.com> (raw)
In-Reply-To: <20221127124942.1665522-1-npiggin@gmail.com>
This is equal to STACK_FRAME_MIN_SIZE on 32-bit and 64-bit ELFv1, and no
longer used in 64-bit ELFv2, so replace STACK_FRAME_OVERHEAD occurrences
with STACK_FRAME_MIN_SIZE.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/ptrace.h | 24 +++++++++++-------------
1 file changed, 11 insertions(+), 13 deletions(-)
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h
index a9dfce62a5eb..a53c580388e2 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -117,7 +117,6 @@ struct pt_regs
#define USER_REDZONE_SIZE 512
#define KERNEL_REDZONE_SIZE 288
-#define STACK_FRAME_OVERHEAD 112 /* size of minimum stack frame */
#define STACK_FRAME_LR_SAVE 2 /* Location of LR in stack frame */
#ifdef CONFIG_PPC64_ELF_ABI_V2
@@ -134,11 +133,11 @@ struct pt_regs
* so the second from last one of those is used for the frame marker.
*/
#define STACK_FRAME_MIN_SIZE 112
-#define STACK_USER_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_INT_FRAME_REGS STACK_FRAME_OVERHEAD
-#define STACK_INT_FRAME_MARKER (STACK_FRAME_OVERHEAD - 16)
-#define STACK_SWITCH_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_SWITCH_FRAME_REGS STACK_FRAME_OVERHEAD
+#define STACK_USER_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_INT_FRAME_REGS STACK_FRAME_MIN_SIZE
+#define STACK_INT_FRAME_MARKER (STACK_FRAME_MIN_SIZE - 16)
+#define STACK_SWITCH_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_SWITCH_FRAME_REGS STACK_FRAME_MIN_SIZE
#endif
/* Size of dummy stack frame allocated when calling signal handler. */
@@ -149,14 +148,13 @@ struct pt_regs
#define USER_REDZONE_SIZE 0
#define KERNEL_REDZONE_SIZE 0
-#define STACK_FRAME_OVERHEAD 16 /* size of minimum stack frame */
+#define STACK_FRAME_MIN_SIZE 16
#define STACK_FRAME_LR_SAVE 1 /* Location of LR in stack frame */
-#define STACK_USER_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_INT_FRAME_REGS STACK_FRAME_OVERHEAD
-#define STACK_INT_FRAME_MARKER (STACK_FRAME_OVERHEAD - 8)
-#define STACK_FRAME_MIN_SIZE STACK_FRAME_OVERHEAD
-#define STACK_SWITCH_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_OVERHEAD)
-#define STACK_SWITCH_FRAME_REGS STACK_FRAME_OVERHEAD
+#define STACK_USER_INT_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_INT_FRAME_REGS STACK_FRAME_MIN_SIZE
+#define STACK_INT_FRAME_MARKER (STACK_FRAME_MIN_SIZE - 8)
+#define STACK_SWITCH_FRAME_SIZE (sizeof(struct pt_regs) + STACK_FRAME_MIN_SIZE)
+#define STACK_SWITCH_FRAME_REGS STACK_FRAME_MIN_SIZE
/* Size of stack frame allocated when calling signal handler. */
#define __SIGNAL_FRAMESIZE 64
--
2.37.2
next prev parent reply other threads:[~2022-11-27 13:06 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-27 12:49 [PATCH 00/17] powerpc: Remove STACK_FRAME_OVERHEAD Nicholas Piggin
2022-11-27 12:49 ` [PATCH 01/17] KVM: PPC: Book3E: Fix CONFIG_TRACE_IRQFLAGS support Nicholas Piggin
2022-11-27 12:49 ` [PATCH 02/17] powerpc/64: Remove asm interrupt tracing call helpers Nicholas Piggin
2022-11-27 12:49 ` [PATCH 03/17] powerpc/perf: callchain validate kernel stack pointer bounds Nicholas Piggin
2022-11-27 12:49 ` [PATCH 04/17] powerpc: Rearrange copy_thread child stack creation Nicholas Piggin
2022-11-27 12:49 ` [PATCH 05/17] powerpc/pseries: hvcall stack frame overhead Nicholas Piggin
2022-11-27 12:49 ` [PATCH 06/17] powerpc: simplify ppc_save_regs Nicholas Piggin
2022-11-27 12:49 ` [PATCH 07/17] powerpc: add definition for pt_regs offset within an interrupt frame Nicholas Piggin
2022-11-27 12:49 ` [PATCH 08/17] powerpc: add a definition for the marker offset within the " Nicholas Piggin
2022-11-27 12:49 ` [PATCH 09/17] powerpc: Rename STACK_FRAME_MARKER and derive it from frame offset Nicholas Piggin
2022-11-27 12:49 ` [PATCH 10/17] powerpc: add a define for the user interrupt frame size Nicholas Piggin
2022-11-27 12:49 ` [PATCH 11/17] powerpc: add a define for the switch frame size and regs offset Nicholas Piggin
2022-11-27 12:49 ` [PATCH 12/17] powerpc: copy_thread fill in interrupt frame marker and back chain Nicholas Piggin
2022-11-27 12:49 ` [PATCH 13/17] powerpc: copy_thread add a back chain to the switch stack frame Nicholas Piggin
2022-11-27 12:49 ` [PATCH 14/17] powerpc: split validate_sp into two functions Nicholas Piggin
2022-11-27 12:49 ` [PATCH 15/17] powerpc: allow minimum sized kernel stack frames Nicholas Piggin
2022-11-27 12:49 ` [PATCH 16/17] powerpc/64: ELFv2 use minimal stack frames in int and switch frame sizes Nicholas Piggin
2022-11-27 12:49 ` Nicholas Piggin [this message]
2022-12-08 12:40 ` [PATCH 00/17] powerpc: Remove STACK_FRAME_OVERHEAD Michael Ellerman
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