arm64: rename S_FRAME_SIZE to PT_REGS_SIZE

S_FRAME_SIZE is the size of the pt_regs structure, no longer the size of
the kernel stack frame, the name is misleading. In keeping with arm32,
rename S_FRAME_SIZE to PT_REGS_SIZE.

Signed-off-by: Jianlin Lv <Jianlin.Lv@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lore.kernel.org/r/20210112015813.2340969-1-Jianlin.Lv@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c
index f42fd9e..3017844 100644 (file)
--- a/arch/arm64/kernel/asm-offsets.c
+++ b/arch/arm64/kernel/asm-offsets.c
@@ -75,7 +75,7 @@ int main(void)
   DEFINE(S_SDEI_TTBR1,         offsetof(struct pt_regs, sdei_ttbr1));
   DEFINE(S_PMR_SAVE,           offsetof(struct pt_regs, pmr_save));
   DEFINE(S_STACKFRAME,         offsetof(struct pt_regs, stackframe));
-  DEFINE(S_FRAME_SIZE,         sizeof(struct pt_regs));
+  DEFINE(PT_REGS_SIZE,         sizeof(struct pt_regs));
   BLANK();
 #ifdef CONFIG_COMPAT
   DEFINE(COMPAT_SIGFRAME_REGS_OFFSET,          offsetof(struct compat_sigframe, uc.uc_mcontext.arm_r0));

diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S
index a338f40..b3e4f9a 100644 (file)
--- a/arch/arm64/kernel/entry-ftrace.S
+++ b/arch/arm64/kernel/entry-ftrace.S
@@ -35,7 +35,7 @@
  */
        .macro  ftrace_regs_entry, allregs=0
        /* Make room for pt_regs, plus a callee frame */
-       sub     sp, sp, #(S_FRAME_SIZE + 16)
+       sub     sp, sp, #(PT_REGS_SIZE + 16)
 
        /* Save function arguments (and x9 for simplicity) */
        stp     x0, x1, [sp, #S_X0]
@@ -61,15 +61,15 @@
        .endif
 
        /* Save the callsite's SP and LR */
-       add     x10, sp, #(S_FRAME_SIZE + 16)
+       add     x10, sp, #(PT_REGS_SIZE + 16)
        stp     x9, x10, [sp, #S_LR]
 
        /* Save the PC after the ftrace callsite */
        str     x30, [sp, #S_PC]
 
        /* Create a frame record for the callsite above pt_regs */
-       stp     x29, x9, [sp, #S_FRAME_SIZE]
-       add     x29, sp, #S_FRAME_SIZE
+       stp     x29, x9, [sp, #PT_REGS_SIZE]
+       add     x29, sp, #PT_REGS_SIZE
 
        /* Create our frame record within pt_regs. */
        stp     x29, x30, [sp, #S_STACKFRAME]
@@ -120,7 +120,7 @@ ftrace_common_return:
        ldr     x9, [sp, #S_PC]
 
        /* Restore the callsite's SP */
-       add     sp, sp, #S_FRAME_SIZE + 16
+       add     sp, sp, #PT_REGS_SIZE + 16
 
        ret     x9
 SYM_CODE_END(ftrace_common)
@@ -130,7 +130,7 @@ SYM_CODE_START(ftrace_graph_caller)
        ldr     x0, [sp, #S_PC]
        sub     x0, x0, #AARCH64_INSN_SIZE      // ip (callsite's BL insn)
        add     x1, sp, #S_LR                   // parent_ip (callsite's LR)
-       ldr     x2, [sp, #S_FRAME_SIZE]         // parent fp (callsite's FP)
+       ldr     x2, [sp, #PT_REGS_SIZE]         // parent fp (callsite's FP)
        bl      prepare_ftrace_return
        b       ftrace_common_return
 SYM_CODE_END(ftrace_graph_caller)

diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index a8c3e7a..c9bae73 100644 (file)
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -75,7 +75,7 @@ alternative_else_nop_endif
        .endif
 #endif
 
-       sub     sp, sp, #S_FRAME_SIZE
+       sub     sp, sp, #PT_REGS_SIZE
 #ifdef CONFIG_VMAP_STACK
        /*
         * Test whether the SP has overflowed, without corrupting a GPR.
@@ -96,7 +96,7 @@ alternative_else_nop_endif
         * userspace, and can clobber EL0 registers to free up GPRs.
         */
 
-       /* Stash the original SP (minus S_FRAME_SIZE) in tpidr_el0. */
+       /* Stash the original SP (minus PT_REGS_SIZE) in tpidr_el0. */
        msr     tpidr_el0, x0
 
        /* Recover the original x0 value and stash it in tpidrro_el0 */
@@ -253,7 +253,7 @@ alternative_else_nop_endif
 
        scs_load tsk, x20
        .else
-       add     x21, sp, #S_FRAME_SIZE
+       add     x21, sp, #PT_REGS_SIZE
        get_current_task tsk
        .endif /* \el == 0 */
        mrs     x22, elr_el1
@@ -377,7 +377,7 @@ alternative_else_nop_endif
        ldp     x26, x27, [sp, #16 * 13]
        ldp     x28, x29, [sp, #16 * 14]
        ldr     lr, [sp, #S_LR]
-       add     sp, sp, #S_FRAME_SIZE           // restore sp
+       add     sp, sp, #PT_REGS_SIZE           // restore sp
 
        .if     \el == 0
 alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0
@@ -580,12 +580,12 @@ __bad_stack:
 
        /*
         * Store the original GPRs to the new stack. The orginal SP (minus
-        * S_FRAME_SIZE) was stashed in tpidr_el0 by kernel_ventry.
+        * PT_REGS_SIZE) was stashed in tpidr_el0 by kernel_ventry.
         */
-       sub     sp, sp, #S_FRAME_SIZE
+       sub     sp, sp, #PT_REGS_SIZE
        kernel_entry 1
        mrs     x0, tpidr_el0
-       add     x0, x0, #S_FRAME_SIZE
+       add     x0, x0, #PT_REGS_SIZE
        str     x0, [sp, #S_SP]
 
        /* Stash the regs for handle_bad_stack */

diff --git a/arch/arm64/kernel/probes/kprobes_trampoline.S b/arch/arm64/kernel/probes/kprobes_trampoline.S
index 890ca72..288a84e 100644 (file)
--- a/arch/arm64/kernel/probes/kprobes_trampoline.S
+++ b/arch/arm64/kernel/probes/kprobes_trampoline.S
@@ -25,7 +25,7 @@
        stp x24, x25, [sp, #S_X24]
        stp x26, x27, [sp, #S_X26]
        stp x28, x29, [sp, #S_X28]
-       add x0, sp, #S_FRAME_SIZE
+       add x0, sp, #PT_REGS_SIZE
        stp lr, x0, [sp, #S_LR]
        /*
         * Construct a useful saved PSTATE
@@ -62,7 +62,7 @@
        .endm
 
 SYM_CODE_START(kretprobe_trampoline)
-       sub sp, sp, #S_FRAME_SIZE
+       sub sp, sp, #PT_REGS_SIZE
 
        save_all_base_regs
 
@@ -76,7 +76,7 @@ SYM_CODE_START(kretprobe_trampoline)
 
        restore_all_base_regs
 
-       add sp, sp, #S_FRAME_SIZE
+       add sp, sp, #PT_REGS_SIZE
        ret
 
 SYM_CODE_END(kretprobe_trampoline)