mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
RISC-V: Add support for dl_runtime_profile (BZ #31151)
Code is mostly inspired from the LoongArch one, which has a similar ABI, with minor changes to support riscv32 and register differences. This fixes elf/tst-sprof-basic. This also fixes elf/tst-audit1, elf/tst-audit2 and elf/tst-audit8 with recent binutils snapshots when --enable-bind-now is used. Resolves: BZ #31151 Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
parent
a8a4c94ae9
commit
6b32696116
@ -2,6 +2,10 @@ ifeq ($(subdir),misc)
|
||||
sysdep_headers += sys/asm.h
|
||||
endif
|
||||
|
||||
ifeq ($(subdir),elf)
|
||||
gen-as-const-headers += dl-link.sym
|
||||
endif
|
||||
|
||||
# RISC-V's assembler also needs to know about PIC as it changes the definition
|
||||
# of some assembler macros.
|
||||
ASFLAGS-.os += $(pic-ccflag)
|
||||
|
18
sysdeps/riscv/dl-link.sym
Normal file
18
sysdeps/riscv/dl-link.sym
Normal file
@ -0,0 +1,18 @@
|
||||
#include <stddef.h>
|
||||
#include <sysdep.h>
|
||||
#include <link.h>
|
||||
|
||||
DL_SIZEOF_RG sizeof(struct La_riscv_regs)
|
||||
DL_SIZEOF_RV sizeof(struct La_riscv_retval)
|
||||
|
||||
DL_OFFSET_RG_A0 offsetof(struct La_riscv_regs, lr_reg)
|
||||
#ifndef __riscv_float_abi_soft
|
||||
DL_OFFSET_RG_FA0 offsetof(struct La_riscv_regs, lr_fpreg)
|
||||
#endif
|
||||
DL_OFFSET_RG_RA offsetof(struct La_riscv_regs, lr_ra)
|
||||
DL_OFFSET_RG_SP offsetof(struct La_riscv_regs, lr_sp)
|
||||
|
||||
DL_OFFSET_RV_A0 offsetof(struct La_riscv_retval, lrv_a0)
|
||||
#ifndef __riscv_float_abi_soft
|
||||
DL_OFFSET_RV_FA0 offsetof(struct La_riscv_retval, lrv_fa0)
|
||||
#endif
|
@ -313,13 +313,38 @@ elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
|
||||
if (l->l_info[DT_JMPREL])
|
||||
{
|
||||
extern void _dl_runtime_resolve (void) __attribute__ ((visibility ("hidden")));
|
||||
extern void _dl_runtime_profile (void) __attribute__ ((visibility ("hidden")));
|
||||
ElfW(Addr) *gotplt = (ElfW(Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
|
||||
/* If a library is prelinked but we have to relocate anyway,
|
||||
we have to be able to undo the prelinking of .got.plt.
|
||||
The prelinker saved the address of .plt for us here. */
|
||||
if (gotplt[1])
|
||||
l->l_mach.plt = gotplt[1] + l->l_addr;
|
||||
gotplt[0] = (ElfW(Addr)) &_dl_runtime_resolve;
|
||||
/* The gotplt[0] entry contains the address of a function which gets
|
||||
called to get the address of a so far unresolved function and
|
||||
jump to it. The profiling extension of the dynamic linker allows
|
||||
to intercept the calls to collect information. In this case we
|
||||
don't store the address in the GOT so that all future calls also
|
||||
end in this function. */
|
||||
#ifdef SHARED
|
||||
if (profile != 0)
|
||||
{
|
||||
gotplt[0] = (ElfW(Addr)) &_dl_runtime_profile;
|
||||
|
||||
if (GLRO(dl_profile) != NULL
|
||||
&& _dl_name_match_p (GLRO(dl_profile), l))
|
||||
/* Say that we really want profiling and the timers are
|
||||
started. */
|
||||
GL(dl_profile_map) = l;
|
||||
}
|
||||
else
|
||||
#endif
|
||||
{
|
||||
/* This function will get called to fix up the GOT entry
|
||||
indicated by the offset on the stack, and then jump to
|
||||
the resolved address. */
|
||||
gotplt[0] = (ElfW(Addr)) &_dl_runtime_resolve;
|
||||
}
|
||||
gotplt[1] = (ElfW(Addr)) l;
|
||||
}
|
||||
|
||||
|
@ -20,6 +20,8 @@
|
||||
#include <sysdep.h>
|
||||
#include <sys/asm.h>
|
||||
|
||||
#include "dl-link.h"
|
||||
|
||||
/* Assembler veneer called from the PLT header code for lazy loading.
|
||||
The PLT header passes its own args in t0-t2. */
|
||||
|
||||
@ -88,3 +90,178 @@ ENTRY (_dl_runtime_resolve)
|
||||
# Invoke the callee.
|
||||
jr t1
|
||||
END (_dl_runtime_resolve)
|
||||
|
||||
#if !defined PROF && defined SHARED
|
||||
ENTRY (_dl_runtime_profile)
|
||||
/* RISC-V we get called with:
|
||||
t0 linkr_map pointer
|
||||
t1 the scaled offset stored in t0, which can be used
|
||||
to calculate the offset of the current symbol in .rela.plt
|
||||
t2 %hi(%pcrel(.got.plt)) stored in t2, no use in this function
|
||||
t3 dl resolver entry point, no use in this function
|
||||
|
||||
Stack frame layout with hard float:
|
||||
RV64 RV32
|
||||
[sp, #96] [sp, #48] La_riscv_regs
|
||||
[sp, #48] [sp, #24] La_riscv_retval
|
||||
[sp, #40] [sp, #20] frame size return from pltenter
|
||||
[sp, #32] [sp, #16] dl_profile_call saved a1
|
||||
[sp, #24] [sp, #12] dl_profile_call saved a0
|
||||
[sp, #16] [sp, #8] T1
|
||||
[sp, #0] [sp, #0] ra, fp <- fp
|
||||
*/
|
||||
|
||||
# define OFFSET_T1 2*SZREG
|
||||
# define OFFSET_SAVED_CALL_A0 OFFSET_T1 + SZREG
|
||||
# define OFFSET_SAVED_CALL_A1 OFFSET_SAVED_CALL_A0 + SZREG
|
||||
# define OFFSET_FS OFFSET_SAVED_CALL_A1 + SZREG
|
||||
# define OFFSET_RV OFFSET_FS + SZREG
|
||||
# define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV
|
||||
|
||||
# define SF_SIZE (-(-(OFFSET_RG + DL_SIZEOF_RG) & ALMASK))
|
||||
|
||||
# Save arguments to stack.
|
||||
add sp, sp, -SF_SIZE
|
||||
REG_S ra, 0(sp)
|
||||
REG_S fp, SZREG(sp)
|
||||
|
||||
mv fp, sp
|
||||
|
||||
REG_S a0, OFFSET_RG + DL_OFFSET_RG_A0 + 0*SZREG(fp)
|
||||
REG_S a1, OFFSET_RG + DL_OFFSET_RG_A0 + 1*SZREG(fp)
|
||||
REG_S a2, OFFSET_RG + DL_OFFSET_RG_A0 + 2*SZREG(fp)
|
||||
REG_S a3, OFFSET_RG + DL_OFFSET_RG_A0 + 3*SZREG(fp)
|
||||
REG_S a4, OFFSET_RG + DL_OFFSET_RG_A0 + 4*SZREG(fp)
|
||||
REG_S a5, OFFSET_RG + DL_OFFSET_RG_A0 + 5*SZREG(fp)
|
||||
REG_S a6, OFFSET_RG + DL_OFFSET_RG_A0 + 6*SZREG(fp)
|
||||
REG_S a7, OFFSET_RG + DL_OFFSET_RG_A0 + 7*SZREG(fp)
|
||||
|
||||
#ifndef __riscv_float_abi_soft
|
||||
FREG_S fa0, OFFSET_RG + DL_OFFSET_RG_FA0 + 0*SZFREG(fp)
|
||||
FREG_S fa1, OFFSET_RG + DL_OFFSET_RG_FA0 + 1*SZFREG(fp)
|
||||
FREG_S fa2, OFFSET_RG + DL_OFFSET_RG_FA0 + 2*SZFREG(fp)
|
||||
FREG_S fa3, OFFSET_RG + DL_OFFSET_RG_FA0 + 3*SZFREG(fp)
|
||||
FREG_S fa4, OFFSET_RG + DL_OFFSET_RG_FA0 + 4*SZFREG(fp)
|
||||
FREG_S fa5, OFFSET_RG + DL_OFFSET_RG_FA0 + 5*SZFREG(fp)
|
||||
FREG_S fa6, OFFSET_RG + DL_OFFSET_RG_FA0 + 6*SZFREG(fp)
|
||||
FREG_S fa7, OFFSET_RG + DL_OFFSET_RG_FA0 + 7*SZFREG(fp)
|
||||
#endif
|
||||
|
||||
# Update .got.plt and obtain runtime address of callee.
|
||||
slli a1, t1, 1
|
||||
mv a0, t0
|
||||
add a1, a1, t1 # link map
|
||||
mv a2, ra # return addr
|
||||
addi a3, fp, OFFSET_RG # La_riscv_regs pointer
|
||||
addi a4, fp, OFFSET_FS # frame size return from pltenter
|
||||
|
||||
REG_S a0, OFFSET_SAVED_CALL_A0(fp)
|
||||
REG_S a1, OFFSET_SAVED_CALL_A1(fp)
|
||||
|
||||
la t2, _dl_profile_fixup
|
||||
jalr t2
|
||||
|
||||
REG_L t3, OFFSET_FS(fp)
|
||||
bgez t3, 1f
|
||||
|
||||
# Save the return.
|
||||
mv t4, a0
|
||||
|
||||
# Restore arguments from stack.
|
||||
REG_L a0, OFFSET_RG + DL_OFFSET_RG_A0 + 0*SZREG(fp)
|
||||
REG_L a1, OFFSET_RG + DL_OFFSET_RG_A0 + 1*SZREG(fp)
|
||||
REG_L a2, OFFSET_RG + DL_OFFSET_RG_A0 + 2*SZREG(fp)
|
||||
REG_L a3, OFFSET_RG + DL_OFFSET_RG_A0 + 3*SZREG(fp)
|
||||
REG_L a4, OFFSET_RG + DL_OFFSET_RG_A0 + 4*SZREG(fp)
|
||||
REG_L a5, OFFSET_RG + DL_OFFSET_RG_A0 + 5*SZREG(fp)
|
||||
REG_L a6, OFFSET_RG + DL_OFFSET_RG_A0 + 6*SZREG(fp)
|
||||
REG_L a7, OFFSET_RG + DL_OFFSET_RG_A0 + 7*SZREG(fp)
|
||||
|
||||
#ifndef __riscv_float_abi_soft
|
||||
FREG_L fa0, OFFSET_RG + DL_OFFSET_RG_FA0 + 0*SZFREG(fp)
|
||||
FREG_L fa1, OFFSET_RG + DL_OFFSET_RG_FA0 + 1*SZFREG(fp)
|
||||
FREG_L fa2, OFFSET_RG + DL_OFFSET_RG_FA0 + 2*SZFREG(fp)
|
||||
FREG_L fa3, OFFSET_RG + DL_OFFSET_RG_FA0 + 3*SZFREG(fp)
|
||||
FREG_L fa4, OFFSET_RG + DL_OFFSET_RG_FA0 + 4*SZFREG(fp)
|
||||
FREG_L fa5, OFFSET_RG + DL_OFFSET_RG_FA0 + 5*SZFREG(fp)
|
||||
FREG_L fa6, OFFSET_RG + DL_OFFSET_RG_FA0 + 6*SZFREG(fp)
|
||||
FREG_L fa7, OFFSET_RG + DL_OFFSET_RG_FA0 + 7*SZFREG(fp)
|
||||
#endif
|
||||
|
||||
REG_L ra, 0(fp)
|
||||
REG_L fp, SZREG(fp)
|
||||
|
||||
addi sp, sp, SF_SIZE
|
||||
jr t4
|
||||
|
||||
1:
|
||||
# The new frame size is in t3.
|
||||
sub sp, fp, t3
|
||||
andi sp, sp, ALMASK
|
||||
|
||||
REG_S a0, OFFSET_T1(fp)
|
||||
|
||||
mv a0, sp
|
||||
addi a1, fp, SF_SIZE
|
||||
mv a2, t3
|
||||
la t4, memcpy
|
||||
jalr t4
|
||||
|
||||
REG_L t4, OFFSET_T1(fp)
|
||||
|
||||
# Call the function.
|
||||
REG_L a0, OFFSET_RG + DL_OFFSET_RG_A0 + 0*SZREG(fp)
|
||||
REG_L a1, OFFSET_RG + DL_OFFSET_RG_A0 + 1*SZREG(fp)
|
||||
REG_L a2, OFFSET_RG + DL_OFFSET_RG_A0 + 2*SZREG(fp)
|
||||
REG_L a3, OFFSET_RG + DL_OFFSET_RG_A0 + 3*SZREG(fp)
|
||||
REG_L a4, OFFSET_RG + DL_OFFSET_RG_A0 + 4*SZREG(fp)
|
||||
REG_L a5, OFFSET_RG + DL_OFFSET_RG_A0 + 5*SZREG(fp)
|
||||
REG_L a6, OFFSET_RG + DL_OFFSET_RG_A0 + 6*SZREG(fp)
|
||||
REG_L a7, OFFSET_RG + DL_OFFSET_RG_A0 + 7*SZREG(fp)
|
||||
|
||||
#ifndef __riscv_float_abi_soft
|
||||
FREG_L fa0, OFFSET_RG + DL_OFFSET_RG_FA0 + 0*SZFREG(fp)
|
||||
FREG_L fa1, OFFSET_RG + DL_OFFSET_RG_FA0 + 1*SZFREG(fp)
|
||||
FREG_L fa2, OFFSET_RG + DL_OFFSET_RG_FA0 + 2*SZFREG(fp)
|
||||
FREG_L fa3, OFFSET_RG + DL_OFFSET_RG_FA0 + 3*SZFREG(fp)
|
||||
FREG_L fa4, OFFSET_RG + DL_OFFSET_RG_FA0 + 4*SZFREG(fp)
|
||||
FREG_L fa5, OFFSET_RG + DL_OFFSET_RG_FA0 + 5*SZFREG(fp)
|
||||
FREG_L fa6, OFFSET_RG + DL_OFFSET_RG_FA0 + 6*SZFREG(fp)
|
||||
FREG_L fa7, OFFSET_RG + DL_OFFSET_RG_FA0 + 7*SZFREG(fp)
|
||||
#endif
|
||||
jalr t4
|
||||
|
||||
REG_S a0, OFFSET_SAVED_CALL_A0 + DL_OFFSET_RV_A0(fp)
|
||||
REG_S a1, OFFSET_SAVED_CALL_A0 + DL_OFFSET_RV_A0 + SZREG(fp)
|
||||
|
||||
#ifndef __riscv_float_abi_soft
|
||||
FREG_S fa0, OFFSET_SAVED_CALL_A0 + DL_OFFSET_RV_FA0(fp)
|
||||
FREG_S fa1, OFFSET_SAVED_CALL_A0 + DL_OFFSET_RV_FA0 + SZFREG(fp)
|
||||
#endif
|
||||
|
||||
# Setup call to pltexit.
|
||||
REG_L a0, OFFSET_SAVED_CALL_A0(fp)
|
||||
REG_L a1, OFFSET_SAVED_CALL_A0 + SZREG(fp)
|
||||
addi a2, fp, OFFSET_RG
|
||||
addi a3, fp, OFFSET_RV
|
||||
la t4, _dl_audit_pltexit
|
||||
jalr t4
|
||||
|
||||
REG_L a0, OFFSET_RV + DL_OFFSET_RV_A0(fp)
|
||||
REG_L a1, OFFSET_RV + DL_OFFSET_RV_A0 + SZREG(fp)
|
||||
|
||||
#ifndef __riscv_float_abi_soft
|
||||
FREG_L fa0, OFFSET_RV + DL_OFFSET_RV_FA0(fp)
|
||||
FREG_L fa1, OFFSET_RV + DL_OFFSET_RV_FA0 + SZFREG(fp)
|
||||
#endif
|
||||
|
||||
# RA from within La_riscv_reg.
|
||||
REG_L ra, OFFSET_RG + DL_OFFSET_RG_RA(fp)
|
||||
mv sp, fp
|
||||
ADDI sp, sp, SF_SIZE
|
||||
REG_S fp, SZREG(fp)
|
||||
|
||||
jr ra
|
||||
|
||||
END (_dl_runtime_profile)
|
||||
#endif /* SHARED */
|
||||
|
Loading…
Reference in New Issue
Block a user