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| author | Tatsuyuki Ishi <ishitatsuyuki@gmail.com> | 2024-02-21 02:55:52 +0900 |
|---|---|---|
| committer | Nelson Chu <nelson@rivosinc.com> | 2024-02-29 15:02:55 +0800 |
| commit | 159afbb7617d2c8a9cd3f3350374711f37f60442 (patch) | |
| tree | c6ca5d1b84b1c73cecd1bc918f75c4908e70f822 /ld | |
| parent | e0f747d5e912f3a7115a578662a7a5a537cd0eae (diff) | |
| download | gdb-159afbb7617d2c8a9cd3f3350374711f37f60442.zip gdb-159afbb7617d2c8a9cd3f3350374711f37f60442.tar.gz gdb-159afbb7617d2c8a9cd3f3350374711f37f60442.tar.bz2 | |
RISC-V: Initial ld.bfd support for TLSDESC.
Only relocation handling for now; relaxation is not implemented yet.
bfd/
* elfnn-riscv.c (riscv_elf_check_relocs): Record GOT reference and
paired relocation for TLSDESC_HI20.
(riscv_elf_adjust_dynamic_symbol): Allocate GOT and reloc slots for
TLSDESC symbols.
(riscv_elf_size_dynamic_sections): Likewise but for local symbols.
(tlsdescoff): New helper to determine static addend for R_TLSDESC.
(riscv_elf_relocate_section): Ignore TLSDESC_CALL reloc for now (it is
relaxation only).
Handle TLSDESC_{LOAD,ADD}_LO12 as paired pcrel relocs.
For TLS GOT slot generation, generalize the logic to handle any
combination of (GD, IE, TLSDESC).
Add TLSDESC Rela generation.
* ld/testsuite/ld-riscv-elf/tls*: Add TLSDESC instruction sequences
next to the existing GD and IE sequences. Update expectations.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/testsuite/ld-riscv-elf/tls.d | 4 | ||||
| -rw-r--r-- | ld/testsuite/ld-riscv-elf/tls.s | 14 | ||||
| -rw-r--r-- | ld/testsuite/ld-riscv-elf/tlsbin.d | 5 |
3 files changed, 22 insertions, 1 deletions
diff --git a/ld/testsuite/ld-riscv-elf/tls.d b/ld/testsuite/ld-riscv-elf/tls.d index e7f2030..6cf008a 100644 --- a/ld/testsuite/ld-riscv-elf/tls.d +++ b/ld/testsuite/ld-riscv-elf/tls.d @@ -2,13 +2,15 @@ #ld: --shared tmpdir/tlslib.so #readelf: -Wr -Relocation section '.rela.dyn' at offset 0x[0-9a-f]+ contains 5 entries: +Relocation section '.rela.dyn' at offset 0x[0-9a-f]+ contains 7 entries: +Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend [0-9a-f]+ +[0-9a-f]+ R_RISCV_TLS_DTPMOD64 +0 [0-9a-f]+ +[0-9a-f]+ R_RISCV_TLS_TPREL64 +4 +[0-9a-f]+ +[0-9a-f]+ R_RISCV_TLSDESC +4 [0-9a-f]+ +[0-9a-f]+ R_RISCV_TLS_DTPMOD64 +0+ sg1 \+ 0 [0-9a-f]+ +[0-9a-f]+ R_RISCV_TLS_DTPREL64 +0+ sg1 \+ 0 [0-9a-f]+ +[0-9a-f]+ R_RISCV_TLS_TPREL64 +0+ sg1 \+ 0 +[0-9a-f]+ +[0-9a-f]+ R_RISCV_TLSDESC +0+ sg1 \+ 0 Relocation section '.rela.plt' at offset 0x[0-9a-f]+ contains 1 entry: +Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend diff --git a/ld/testsuite/ld-riscv-elf/tls.s b/ld/testsuite/ld-riscv-elf/tls.s index 79e9bc2..7cbf5ea 100644 --- a/ld/testsuite/ld-riscv-elf/tls.s +++ b/ld/testsuite/ld-riscv-elf/tls.s @@ -17,6 +17,13 @@ _start: la.tls.ie a0,sg1 add a0,a0,tp + /* GD (TLSDESC), global var */ +.desc1: + auipc a0, %tlsdesc_hi(sg1) + lw t0, %tlsdesc_load_lo(.desc1)(a0) + addi a0, a0, %tlsdesc_add_lo(.desc1) + jalr t0, t0, %tlsdesc_call(.desc1) + /* GD, local var */ la.tls.gd a0,sl1 call __tls_get_addr @@ -25,4 +32,11 @@ _start: la.tls.ie a0,sl1 add a0,a0,tp + /* GD (TLSDESC), local var */ +.desc2: + auipc a0, %tlsdesc_hi(sl1) + lw t0, %tlsdesc_load_lo(.desc2)(a0) + addi a0, a0, %tlsdesc_add_lo(.desc2) + jalr t0, t0, %tlsdesc_call(.desc2) + ret diff --git a/ld/testsuite/ld-riscv-elf/tlsbin.d b/ld/testsuite/ld-riscv-elf/tlsbin.d index cdcd51a..79b7ade 100644 --- a/ld/testsuite/ld-riscv-elf/tlsbin.d +++ b/ld/testsuite/ld-riscv-elf/tlsbin.d @@ -2,6 +2,11 @@ #ld: -no-pie tmpdir/tlslib.so #readelf: -Wr +Relocation section '.rela.dyn' at offset 0x[0-9a-f]+ contains 2 entries: + +Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend +[0-9a-f]+ +[0-9a-f]+ R_RISCV_TLSDESC +4 +[0-9a-f]+ +[0-9a-f]+ R_RISCV_TLSDESC +0 + Relocation section '.rela.plt' at offset 0x[0-9a-f]+ contains 1 entry: +Offset +Info +Type +Symbol's Value +Symbol's Name \+ Addend [0-9a-f]+ +[0-9a-f]+ R_RISCV_JUMP_SLOT +[0-9a-f]+ __tls_get_addr \+ 0 |