xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

parisc/ftrace: Add KPROBES_ON_FTRACE

Browse Source 
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>
This commit is contained in:
Sven Schnelle
2019-07-23 22:37:52 +02:00
committed by Helge Deller
parent d562aca37a
commit 52a22e6c27
4 changed files with 157 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

99
arch/parisc/kernel/entry.S
View File

@@ -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