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riscv: add TLSDESC support

This commit is contained in:
Rich Felker 2024-02-03 19:59:26 -05:00
parent 2e1bb87af2
commit 407aea628a
2 changed files with 33 additions and 0 deletions
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1
arch/riscv64/reloc.h
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@ -17,6 +17,7 @@
#define REL_DTPMOD R_RISCV_TLS_DTPMOD64 #define REL_DTPMOD R_RISCV_TLS_DTPMOD64
#define REL_DTPOFF R_RISCV_TLS_DTPREL64 #define REL_DTPOFF R_RISCV_TLS_DTPREL64
#define REL_TPOFF R_RISCV_TLS_TPREL64 #define REL_TPOFF R_RISCV_TLS_TPREL64
#define REL_TLSDESC R_RISCV_TLSDESC
#define CRTJMP(pc,sp) __asm__ __volatile__( \ #define CRTJMP(pc,sp) __asm__ __volatile__( \
"mv sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" ) "mv sp, %1 ; jr %0" : : "r"(pc), "r"(sp) : "memory" )

32
src/ldso/riscv64/tlsdesc.s Normal file
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@ -0,0 +1,32 @@
.text
.global __tlsdesc_static
.hidden __tlsdesc_static
.type __tlsdesc_static,%function
__tlsdesc_static:
ld a0,8(a0)
jr t0
.global __tlsdesc_dynamic
.hidden __tlsdesc_dynamic
.type __tlsdesc_dynamic,%function
__tlsdesc_dynamic:
add sp,sp,-16
sd t1,(sp)
sd t2,8(sp)
ld t2,-8(tp) # t2=dtv
ld a0,8(a0) # a0=&{modidx,off}
ld t1,8(a0) # t1=off
ld a0,(a0) # a0=modidx
sll a0,a0,3 # a0=8*modidx
add a0,a0,t2 # a0=dtv+8*modidx
ld a0,(a0) # a0=dtv[modidx]
add a0,a0,t1 # a0=dtv[modidx]+off
sub a0,a0,tp # a0=dtv[modidx]+off-tp
ld t1,(sp)
ld t2,8(sp)
add sp,sp,16
jr t0