mirror of
https://github.com/RT-Thread/rt-thread.git
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721dfbfe01
- Implemented vDSO functionality for the RISC-V architecture, including the necessary source files and linker scripts. - Introduced a new `vdso_sys.c` file for RISC-V, containing functions to handle time retrieval using the vDSO mechanism. - Created architecture-specific linker scripts (`vdso.lds.S`) for both AArch64 and RISC-V. - Updated the build system to support vDSO compilation for RISC-V, including necessary adjustments in `SConstruct` files. - Refactored existing vDSO code to improve compatibility and maintainability across architectures. - Adjusted the maximum number of PTY devices in the terminal configuration from 64 to 32 for better resource management. - Fixed minor issues in existing code, including correcting the path for the vDSO shared library and ensuring proper function definitions.
110 lines
2.8 KiB
C
110 lines
2.8 KiB
C
#include "mm_aspace.h"
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#include <rtthread.h>
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#include <stdint.h>
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#include <string.h>
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#include <elf.h>
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#ifdef ARCH_MM_MMU
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#include <mmu.h>
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#include <page.h>
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#endif
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typedef struct
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{
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Elf64_Word st_name;
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Elf64_Addr st_value;
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Elf64_Word st_size;
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unsigned char st_info;
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unsigned char st_other;
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Elf64_Half st_shndx;
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} Elf64_sym;
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#ifdef ARCH_MM_MMU
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void arch_elf_reloc(rt_aspace_t aspace, void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf64_sym *dynsym)
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{
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size_t rel_off;
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void *addr;
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if (rel_dyn_size && !dynsym)
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{
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return;
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}
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for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
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{
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uint32_t v1, v2;
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addr = rt_hw_mmu_v2p(aspace, (void *)(((rt_size_t)rel_dyn_start) + rel_off));
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memcpy(&v1, addr, 4);
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addr = rt_hw_mmu_v2p(aspace, (void *)(((rt_size_t)rel_dyn_start) + rel_off + 4));
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memcpy(&v2, addr, 4);
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addr = rt_hw_mmu_v2p(aspace, (void *)((rt_size_t)text_start + v1));
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if ((v2 & 0xff) == R_ARM_RELATIVE)
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{
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*(rt_size_t *)addr += (rt_size_t)text_start;
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}
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else if ((v2 & 0xff) == R_ARM_ABS32)
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{
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uint32_t t;
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t = (v2 >> 8);
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if (t) /* 0 is UDF */
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{
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*(rt_size_t *)addr = (((rt_size_t)text_start) + dynsym[t].st_value);
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}
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}
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}
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/* modify got */
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if (got_size)
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{
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uint32_t *got_item = (uint32_t *)got_start;
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for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
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{
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addr = rt_hw_mmu_v2p(aspace, got_item);
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*(rt_size_t *)addr += (rt_size_t)text_start;
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}
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}
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}
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#else
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void arch_elf_reloc(void *text_start, void *rel_dyn_start, size_t rel_dyn_size, void *got_start, size_t got_size, Elf64_sym *dynsym)
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{
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size_t rel_off;
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if (rel_dyn_size && !dynsym)
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{
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return;
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}
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for (rel_off = 0; rel_off < rel_dyn_size; rel_off += 8)
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{
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uint32_t v1, v2;
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memcpy(&v1, ((rt_uint8_t *)rel_dyn_start) + rel_off, 4);
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memcpy(&v2, ((rt_uint8_t *)rel_dyn_start) + rel_off + 4, 4);
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if ((v2 & 0xff) == R_ARM_RELATIVE)
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{
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*(uint32_t *)(((rt_size_t)text_start) + v1) += (uint32_t)text_start;
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}
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else if ((v2 & 0xff) == R_ARM_ABS32)
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{
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uint32_t t;
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t = (v2 >> 8);
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if (t) /* 0 is UDF */
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{
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*(uint32_t *)(((rt_size_t)text_start) + v1) = (uint32_t)(((rt_size_t)text_start) + dynsym[t].st_value);
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}
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}
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}
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/* modify got */
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if (got_size)
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{
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uint32_t *got_item = (uint32_t *)got_start;
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for (rel_off = 0; rel_off < got_size; rel_off += 4, got_item++)
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{
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*got_item += (uint32_t)text_start;
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}
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}
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}
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#endif
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