diff options
| author | Ben Shi <powerman1st@163.com> | 2023-03-29 11:55:54 +0800 |
|---|---|---|
| committer | Ben Shi <powerman1st@163.com> | 2023-04-28 11:42:06 +0800 |
| commit | 229fcad7fc41bf4d1fcf106456bc429f85b37eab (patch) | |
| tree | f1255819fa3914a300a9910116146a84106cb06b /lld/test | |
| parent | 81d06268f47f089335076eb608c880fc0e60a677 (diff) | |
| download | llvm-229fcad7fc41bf4d1fcf106456bc429f85b37eab.tar.gz | |
[lld][ELF] Support relocations R_AVR_LO8_LDI_GS/R_AVR_HI8_LDI_GS
Relocations R_AVR_LO8_LDI_GS/R_AVR_HI8_LDI_GS (indirect calls
via function pointers) only cover range 128KiB. They are
equivalent to R_AVR_LO8_LDI_PM/R_AVR_HI8_LDI_PM within this
range.
But for function addresses beyond this range, GNU-ld emits
trampolines. And this patch implements corresponding thunks
for them in lld.
Reviewed By: MaskRay
Differential Revision: https://reviews.llvm.org/D147364
Diffstat (limited to 'lld/test')
| -rw-r--r-- | lld/test/ELF/avr-reloc.s | 10 | ||||
| -rw-r--r-- | lld/test/ELF/avr-thunk-ldi-gs.s | 33 |
2 files changed, 41 insertions, 2 deletions
diff --git a/lld/test/ELF/avr-reloc.s b/lld/test/ELF/avr-reloc.s index 36904f80dabb..172c0e03ba74 100644 --- a/lld/test/ELF/avr-reloc.s +++ b/lld/test/ELF/avr-reloc.s @@ -1,12 +1,12 @@ ; REQUIRES: avr ; RUN: llvm-mc -filetype=obj -triple=avr -mcpu=atmega328p %s -o %t0.o -; RUN: ld.lld %t0.o --defsym=a=0x12345678 --defsym=b=30 -o %t0 +; RUN: ld.lld %t0.o --defsym=a=0x12345678 --defsym=b=30 --defsym=c=0x15554 -o %t0 ; RUN: llvm-objdump -d --print-imm-hex --mcpu=atmega328p %t0 | \ ; RUN: FileCheck --check-prefixes=CHECK,AVR %s ; RUN: llvm-objdump -s --mcpu=atmega328p %t0 | \ ; RUN: FileCheck --check-prefixes=HEX,AVRHEX %s ; RUN: llvm-mc -filetype=obj -triple=avr -mcpu=attiny10 %s --defsym=TINY=1 -o %t1.o -; RUN: ld.lld %t1.o --defsym=a=0x12345678 --defsym=b=30 -o %t1 +; RUN: ld.lld %t1.o --defsym=a=0x12345678 --defsym=b=30 --defsym=c=0x15554 -o %t1 ; RUN: llvm-objdump -d --print-imm-hex --mcpu=attiny10 %t1 | FileCheck %s ; RUN: llvm-objdump -s --mcpu=attiny10 %t1 | \ ; RUN: FileCheck --check-prefixes=HEX,TINYHEX %s @@ -20,7 +20,10 @@ ; CHECK-NEXT: ldi r20, 0x3c ; CHECK-NEXT: ldi r20, 0x2b ; CHECK-NEXT: ldi r20, 0x1a +; CHECK-NEXT: ldi r20, 0xaa +; CHECK-NEXT: ldi r20, 0xaa ; CHECK-NEXT: ldi r20, 0xff + ldi r20, lo8(a) ; R_AVR_LO8_LDI ldi r20, hi8(a) ; R_AVR_HI8_LDI ldi r20, hh8(a) ; R_AVR_HH8_LDI @@ -30,6 +33,9 @@ ldi r20, pm_lo8(a) ; R_AVR_LO8_LDI_PM ldi r20, pm_hi8(a) ; R_AVR_HI8_LDI_PM ldi r20, pm_hh8(a) ; R_AVR_HH8_LDI_PM +ldi r20, lo8_gs(c) ; R_AVR_LO8_LDI_GS +ldi r20, hi8_gs(c) ; R_AVR_HI8_LDI_GS + ldi r20, b+225 .section .LDI_NEG,"ax",@progbits diff --git a/lld/test/ELF/avr-thunk-ldi-gs.s b/lld/test/ELF/avr-thunk-ldi-gs.s new file mode 100644 index 000000000000..58de33780ba1 --- /dev/null +++ b/lld/test/ELF/avr-thunk-ldi-gs.s @@ -0,0 +1,33 @@ +; REQUIRES: avr +; RUN: llvm-mc -filetype=obj -triple=avr -mcpu=atmega2560 %s -o %t.o +; RUN: ld.lld %t.o --defsym=a=0x1fffe --defsym=b=0x20000 -o %t +; RUN: llvm-objdump -d --print-imm-hex --no-show-raw-insn --mcpu=atmega2560 %t \ +; RUN: | FileCheck %s + +.section .LDI,"ax",@progbits + +;; CHECK-LABEL: <__AVRThunk_b>: +;; CHECK-NEXT: 110b4: jmp 0x20000 +;; CHECK-LABEL: <__init>: +;; CHECK-NEXT: 110b8: ldi r30, 0xff +;; CHECK-NEXT: 110ba: ldi r31, 0xff +;; CHECK-NEXT: 110bc: eicall +;; The destination of the following two LDI instructions is +;; __AVRThunk_b == 0x110b4, so they actually are +;; ldi r30, ((0x110b4) >> 1) & 0xff +;; ldi r31, ((0x110b4) >> 9) +;; CHECK-NEXT: 110be: ldi r30, 0x5a +;; CHECK-NEXT: 110c0: ldi r31, 0x88 +;; CHECK-NEXT: 110c2: eicall +;; CHECK-NOT: __AVRThunk_a + +.globl __init +__init: +;; No thunk is needed, since the destination is in range [0, 0x1ffff]. +ldi r30, lo8_gs(a) ; R_AVR_LO8_LDI_GS +ldi r31, hi8_gs(a) ; R_AVR_HI8_LDI_GS +eicall +;; A thunk is needed, since the destination is out of range. +ldi r30, lo8_gs(b) ; R_AVR_LO8_LDI_GS +ldi r31, hi8_gs(b) ; R_AVR_HI8_LDI_GS +eicall |