1. The original LA macro instruction is split into two instructions to obtain the address of the symbol if enable '-mexplicit-relocs'. 2. Currently, '-mcmodel=' only supports 'normal' mode, because other mode behaviors are not yet determined. This function is gradually improved by the subsequent handling. 3. The method that calls global functions from 'la.global + jirl' to 'bl' when build with '-fplt'. 4. Some R_LARCH_64 in section .eh_frame will to generate R_LARCH_NONE, we change ASM_PREFERRED_EH_DATA_FORMAT from 'WD_EH_PE_absptr' to 'WD_EH_PE_pcrel | DW_EH_PE_sdata4' then relocation to R_LARCH_32_PCREL from R_LARCH_64 in setction .eh_frame and not generate dynamic relocation for R_LARCH_32_PCREL.
This new symbol loading method not support by upstream binutils yet, this GCC port requires the following patches applied to binutils to build. [1]https://sourceware.org/pipermail/binutils/2022-July/121933.html [2]https://sourceware.org/pipermail/binutils/2022-July/121937.html [3]https://sourceware.org/pipermail/binutils/2022-July/121934.html [4]https://sourceware.org/pipermail/binutils/2022-July/121935.html [5]https://sourceware.org/pipermail/binutils/2022-July/121936.html [6]https://sourceware.org/pipermail/binutils/2022-July/121938.html [7]https://sourceware.org/pipermail/binutils/2022-July/121939.html Lulu Cheng (3): LoongArch: Subdivision symbol type, add SYMBOL_PCREL support. LoongArch: Support split symbol. LoongArch: Modify the definition of the ASM_PREFERRED_EH_DATA_FORMAT macro. .../config/loongarch/loongarch-common.cc | 1 + gcc/config/loongarch/constraints.md | 24 +- gcc/config/loongarch/genopts/loongarch.opt.in | 4 + gcc/config/loongarch/loongarch-protos.h | 10 +- gcc/config/loongarch/loongarch.cc | 652 +++++++++++++----- gcc/config/loongarch/loongarch.h | 4 +- gcc/config/loongarch/loongarch.md | 401 +++-------- gcc/config/loongarch/loongarch.opt | 4 + gcc/config/loongarch/predicates.md | 56 +- .../gcc.target/loongarch/func-call-1.c | 32 + .../gcc.target/loongarch/func-call-2.c | 32 + .../gcc.target/loongarch/func-call-3.c | 32 + .../gcc.target/loongarch/func-call-4.c | 32 + .../gcc.target/loongarch/func-call-5.c | 33 + .../gcc.target/loongarch/func-call-6.c | 33 + .../gcc.target/loongarch/func-call-7.c | 34 + .../gcc.target/loongarch/func-call-8.c | 33 + .../loongarch/relocs-symbol-noaddend.c | 23 + 18 files changed, 905 insertions(+), 535 deletions(-) create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-1.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-2.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-3.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-4.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-5.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-6.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-7.c create mode 100644 gcc/testsuite/gcc.target/loongarch/func-call-8.c create mode 100644 gcc/testsuite/gcc.target/loongarch/relocs-symbol-noaddend.c -- 2.31.1
