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| author |   Sven Schnelle <svens@stackframe.org> | 2019-07-23 22:37:52 +0200 |
|---|---|---|
| committer |   Helge Deller <deller@gmx.de> | 2019-08-03 08:56:57 +0200 |
| commit | 52a22e6c27be9089fdd9c4e1857939f0dec8f57c (patch) | |
| tree | 760e141459f496f85115018ed325878598f41c0e /arch/parisc/kernel/entry.S | |
| parent | parisc/ftrace: Add ARCH_SUPPORTS_FTRACE_OPS support (diff) | |
| download | linux-dev-52a22e6c27be9089fdd9c4e1857939f0dec8f57c.tar.xz linux-dev-52a22e6c27be9089fdd9c4e1857939f0dec8f57c.zip | |
parisc/ftrace: Add KPROBES_ON_FTRACE
Allow KPROBES to use the ftrace infrastructure on PA-RISC.
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>
Diffstat (limited to 'arch/parisc/kernel/entry.S')
| -rw-r--r-- | arch/parisc/kernel/entry.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/arch/parisc/kernel/entry.S b/arch/parisc/kernel/entry.S index d9d3387f7c47..1d1d748c227f 100644 --- a/arch/parisc/kernel/entry.S +++ b/arch/parisc/kernel/entry.S @@ -1996,6 +1996,7 @@ _mcount: * calling mcount(), and 2 instructions for ftrace_stub(). That way we * have all on one L1 cacheline. */ + ldi 0, %arg3 b ftrace_function_trampoline copy %r3, %arg2 /* caller original %sp */ ftrace_stub: @@ -2048,6 +2049,7 @@ ftrace_caller: LDREG 0(%r3), %r25 copy %rp, %r26 ldo -8(%r25), %r25 + ldi 0, %r23 /* no pt_regs */ b,l ftrace_function_trampoline, %rp copy %r3, %r24 @@ -2075,6 +2077,103 @@ ftrace_caller: ENDPROC_CFI(ftrace_caller) +#ifdef CONFIG_HAVE_DYNAMIC_FTRACE_WITH_REGS +ENTRY_CFI(ftrace_regs_caller,caller,frame=FTRACE_FRAME_SIZE+PT_SZ_ALGN, + CALLS,SAVE_RP,SAVE_SP) +ftrace_regs_caller: + .global ftrace_regs_caller + + ldo -FTRACE_FRAME_SIZE(%sp), %r1 + STREG %rp, -RP_OFFSET(%r1) + + copy %sp, %r1 + ldo PT_SZ_ALGN(%sp), %sp + + STREG %rp, PT_GR2(%r1) + STREG %r3, PT_GR3(%r1) + STREG %r4, PT_GR4(%r1) + STREG %r5, PT_GR5(%r1) + STREG %r6, PT_GR6(%r1) + STREG %r7, PT_GR7(%r1) + STREG %r8, PT_GR8(%r1) + STREG %r9, PT_GR9(%r1) + STREG %r10, PT_GR10(%r1) + STREG %r11, PT_GR11(%r1) + STREG %r12, PT_GR12(%r1) + STREG %r13, PT_GR13(%r1) + STREG %r14, PT_GR14(%r1) + STREG %r15, PT_GR15(%r1) + STREG %r16, PT_GR16(%r1) + STREG %r17, PT_GR17(%r1) + STREG %r18, PT_GR18(%r1) + STREG %r19, PT_GR19(%r1) + STREG %r20, PT_GR20(%r1) + STREG %r21, PT_GR21(%r1) + STREG %r22, PT_GR22(%r1) + STREG %r23, PT_GR23(%r1) + STREG %r24, PT_GR24(%r1) + STREG %r25, PT_GR25(%r1) + STREG %r26, PT_GR26(%r1) + STREG %r27, PT_GR27(%r1) + STREG %r28, PT_GR28(%r1) + STREG %r29, PT_GR29(%r1) + STREG %r30, PT_GR30(%r1) + STREG %r31, PT_GR31(%r1) + mfctl %cr11, %r26 + STREG %r26, PT_SAR(%r1) + + copy %rp, %r26 + LDREG -FTRACE_FRAME_SIZE-PT_SZ_ALGN(%sp), %r25 + ldo -8(%r25), %r25 + copy %r3, %arg2 + b,l ftrace_function_trampoline, %rp + copy %r1, %arg3 /* struct pt_regs */ + + ldo -PT_SZ_ALGN(%sp), %r1 + + LDREG PT_SAR(%r1), %rp + mtctl %rp, %cr11 + + LDREG PT_GR2(%r1), %rp + LDREG PT_GR3(%r1), %r3 + LDREG PT_GR4(%r1), %r4 + LDREG PT_GR5(%r1), %r5 + LDREG PT_GR6(%r1), %r6 + LDREG PT_GR7(%r1), %r7 + LDREG PT_GR8(%r1), %r8 + LDREG PT_GR9(%r1), %r9 + LDREG PT_GR10(%r1),%r10 + LDREG PT_GR11(%r1),%r11 + LDREG PT_GR12(%r1),%r12 + LDREG PT_GR13(%r1),%r13 + LDREG PT_GR14(%r1),%r14 + LDREG PT_GR15(%r1),%r15 + LDREG PT_GR16(%r1),%r16 + LDREG PT_GR17(%r1),%r17 + LDREG PT_GR18(%r1),%r18 + LDREG PT_GR19(%r1),%r19 + LDREG PT_GR20(%r1),%r20 + LDREG PT_GR21(%r1),%r21 + LDREG PT_GR22(%r1),%r22 + LDREG PT_GR23(%r1),%r23 + LDREG PT_GR24(%r1),%r24 + LDREG PT_GR25(%r1),%r25 + LDREG PT_GR26(%r1),%r26 + LDREG PT_GR27(%r1),%r27 + LDREG PT_GR28(%r1),%r28 + LDREG PT_GR29(%r1),%r29 + LDREG PT_GR30(%r1),%r30 + LDREG PT_GR31(%r1),%r31 + + ldo -PT_SZ_ALGN(%sp), %sp + LDREGM -FTRACE_FRAME_SIZE(%sp), %r1 + /* Adjust return point to jump back to beginning of traced function */ + ldo -4(%r1), %r1 + bv,n (%r1) + +ENDPROC_CFI(ftrace_regs_caller) + +#endif #endif #ifdef CONFIG_FUNCTION_GRAPH_TRACER |