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libc/arm64: add cfi for optimized func

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(gdb) bt
    #0  arch_strlen () at machine/arm64/gnu/arch_strlen.S:119
    #1  0x000000004043a2c0 in strchr (s=s@entry=0x408e5e40 "HELLO WORLD", c=c@entry=87) at machine/arch_libc.c:252
    #2  0x0000000040504c6c in strchr (c=87, s=0x408e5e40 "HELLO WORLD") at /home/mi/ssd/dev-system/nuttx/include/string.h:306
    #3  test_strchr () at hello_main.c:79
    #4  hello_main (argc=argc@entry=1, argv=argv@entry=0x40b5c090) at hello_main.c:132
    #5  0x000000004043d958 in nxtask_startup (entrypt=0x40504ba0 <hello_main>, argc=argc@entry=1, argv=argv@entry=0x40b5c090) at sched/task_startup.c:72
    #6  0x00000000403f1ab4 in nxtask_start () at task/task_start.c:104
    #7  0x0000000000000000 in ?? ()

Signed-off-by: yangao1 <yangao1@xiaomi.com>
This commit is contained in:
yangao1
2025-05-20 20:55:06 +08:00
committed by Xiang Xiao
parent 34aef9cbec
commit 15eb317be2
13 changed files with 39 additions and 0 deletions
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libs/libc/machine/arm64/arch_memchr.S
+3
View File
@@ -81,6 +81,8 @@
.endm
def_fn ARCH_LIBCFUN(memchr)
.cfi_sections .debug_frame
.cfi_startproc
/* Do not dereference srcin if no bytes to compare. */
cbz cntin, .Lzero_length
/*
@@ -174,6 +176,7 @@ def_fn ARCH_LIBCFUN(memchr)
mov result, #0
ret
.cfi_endproc
.size ARCH_LIBCFUN(memchr), . - ARCH_LIBCFUN(memchr)
#endif
libs/libc/machine/arm64/arch_memcmp.S
+3
View File
@@ -95,6 +95,8 @@
.endm
def_fn ARCH_LIBCFUN(memcmp) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
subs limit, limit, 8
b.lo L(less8)
@@ -197,6 +199,7 @@ L(byte_loop):
sub result, data1w, data2w
ret
.cfi_endproc
.size ARCH_LIBCFUN(memcmp), . - ARCH_LIBCFUN(memcmp)
#endif
libs/libc/machine/arm64/arch_memcpy.S
+3
View File
@@ -112,6 +112,8 @@
*/
def_fn ARCH_LIBCFUN(memcpy) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
prfm PLDL1KEEP, [src]
add srcend, src, count
add dstend, dstin, count
@@ -233,6 +235,7 @@ L(copy_long):
stp C_l, C_h, [dstend, -16]
ret
.cfi_endproc
.size ARCH_LIBCFUN(memcpy), . - ARCH_LIBCFUN(memcpy)
#endif
libs/libc/machine/arm64/arch_memmove.S
+3
View File
@@ -101,6 +101,8 @@
*/
def_fn ARCH_LIBCFUN(memmove), 6
.cfi_sections .debug_frame
.cfi_startproc
sub tmp1, dstin, src
cmp count, 96
ccmp tmp1, count, 2, hi
@@ -158,6 +160,7 @@ def_fn ARCH_LIBCFUN(memmove), 6
stp C_l, C_h, [dstin]
3: ret
.cfi_endproc
.size ARCH_LIBCFUN(memmove), . - ARCH_LIBCFUN(memmove)
#endif
libs/libc/machine/arm64/arch_memset.S
+3
View File
@@ -94,6 +94,8 @@
def_fn ARCH_LIBCFUN(memset) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
dup v0.16B, valw
add dstend, dstin, count
@@ -243,6 +245,7 @@ L(zva_other):
sub dst, dst, 32 /* Bias dst for tail loop. */
b L(tail64)
.cfi_endproc
.size ARCH_LIBCFUN(memset), . - ARCH_LIBCFUN(memset)
#endif
libs/libc/machine/arm64/arch_strchr.S
+3
View File
@@ -85,6 +85,8 @@
.endm
def_fn ARCH_LIBCFUN(strchr)
.cfi_sections .debug_frame
.cfi_startproc
/* Magic constant 0x40100401 to allow us to identify which lane
matches the requested byte. Magic constant 0x80200802 used
similarly for NUL termination. */
@@ -162,6 +164,7 @@ def_fn ARCH_LIBCFUN(strchr)
csel result, result, xzr, eq
ret
.cfi_endproc
.size ARCH_LIBCFUN(strchr), . - ARCH_LIBCFUN(strchr)
#endif
libs/libc/machine/arm64/arch_strchrnul.S
+3
View File
@@ -81,6 +81,8 @@
.endm
def_fn ARCH_LIBCFUN(strchrnul)
.cfi_sections .debug_frame
.cfi_startproc
/* Magic constant 0x40100401 to allow us to identify which lane
matches the termination condition. */
mov wtmp2, #0x0401
@@ -147,6 +149,7 @@ def_fn ARCH_LIBCFUN(strchrnul)
add result, src, tmp1, lsr #1
ret
.cfi_endproc
.size ARCH_LIBCFUN(strchrnul), . - ARCH_LIBCFUN(strchrnul)
#endif
libs/libc/machine/arm64/arch_strcmp.S
+3
View File
@@ -77,6 +77,8 @@
/* Start of performance-critical section -- one 64B cache line. */
def_fn ARCH_LIBCFUN(strcmp) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
eor tmp1, src1, src2
mov zeroones, #REP8_01
tst tmp1, #7
@@ -206,6 +208,7 @@ L(loop_misaligned):
L(done):
sub result, data1, data2
ret
.cfi_endproc
.size ARCH_LIBCFUN(strcmp), .-ARCH_LIBCFUN(strcmp)
#endif
libs/libc/machine/arm64/arch_strcpy.S
+3
View File
@@ -108,6 +108,8 @@
#define MIN_PAGE_SIZE (1 << MIN_PAGE_P2)
def_fn ARCH_LIBCFUN(strcpy) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
/* For moderately short strings, the fastest way to do the copy is to
calculate the length of the string in the same way as strlen, then
essentially do a memcpy of the result. This avoids the need for
@@ -321,6 +323,7 @@ def_fn ARCH_LIBCFUN(strcpy) p2align=6
bic has_nul2, tmp3, tmp4
b .Lfp_gt8
.cfi_endproc
.size ARCH_LIBCFUN(strcpy), . - ARCH_LIBCFUN(strcpy)
#endif
libs/libc/machine/arm64/arch_strlen.S
+3
View File
@@ -114,6 +114,8 @@
boundary. */
def_fn ARCH_LIBCFUN(strlen) p2align=6
.cfi_sections .debug_frame
.cfi_startproc
and tmp1, srcin, MIN_PAGE_SIZE - 1
mov zeroones, REP8_01
cmp tmp1, MIN_PAGE_SIZE - 16
@@ -243,6 +245,7 @@ L(page_cross):
csel data2, data2, tmp2, eq
b L(page_cross_entry)
.cfi_endproc
.size ARCH_LIBCFUN(strlen), . - ARCH_LIBCFUN(strlen)
#endif
libs/libc/machine/arm64/arch_strncmp.S
+3
View File
@@ -84,6 +84,8 @@
nop /* Pad so that the loop below fits a cache line. */
.endr
def_fn ARCH_LIBCFUN(strncmp)
.cfi_sections .debug_frame
.cfi_startproc
cbz limit, .Lret0
eor tmp1, src1, src2
mov zeroones, #REP8_01
@@ -295,6 +297,7 @@ def_fn ARCH_LIBCFUN(strncmp)
.Lret0:
mov result, #0
ret
.cfi_endproc
.size ARCH_LIBCFUN(strncmp), . - ARCH_LIBCFUN(strncmp)
#endif
libs/libc/machine/arm64/arch_strnlen.S
+3
View File
@@ -87,6 +87,8 @@
ret
def_fn ARCH_LIBCFUN(strnlen)
.cfi_sections .debug_frame
.cfi_startproc
cbz limit, .Lhit_limit
mov zeroones, #REP8_01
bic src, srcin, #15
@@ -189,6 +191,7 @@ def_fn ARCH_LIBCFUN(strnlen)
csinv data1, data1, xzr, le
csel data2, data2, data2a, le
b .Lrealigned
.cfi_endproc
.size ARCH_LIBCFUN(strnlen), . - .Lstart /* Include pre-padding in size. */
#endif
libs/libc/machine/arm64/arch_strrchr.S
+3
View File
@@ -91,6 +91,8 @@
.endm
def_fn ARCH_LIBCFUN(strrchr)
.cfi_sections .debug_frame
.cfi_startproc
/* Magic constant 0x40100401 to allow us to identify which lane
matches the requested byte. Magic constant 0x80200802 used
similarly for NUL termination. */
@@ -180,6 +182,7 @@ def_fn ARCH_LIBCFUN(strrchr)
ret
.cfi_endproc
.size ARCH_LIBCFUN(strrchr), . - ARCH_LIBCFUN(strrchr)
#endif