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addend retrieval removed from patch_arm32_abs (moved to pelfy)

This commit is contained in:
Nicolas 2025-11-23 17:11:55 +01:00
parent b653b734db
commit 7d2263b4cf
1 changed files with 10 additions and 16 deletions
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26
src/coparun/runmem.c
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@ -42,24 +42,18 @@ void patch_hi21(uint8_t *patch_addr, int32_t page_offset) {
void patch_arm32_abs(uint8_t *patch_addr, uint32_t imm16)
{
uint32_t i = (imm16 >> 11) & 0x1;
uint32_t imm4 = (imm16 >> 12) & 0xF;
uint32_t imm3 = (imm16 >> 8) & 0x7;
uint32_t imm8 = imm16 & 0xFF;
uint32_t instr = *((uint32_t *)patch_addr);
// Clear the fields we are going to replace:
// imm4 → bits 19:16
// imm3 → bits 14:12
// i → bit 26
// imm8 → bits 7:0
instr &= ~(uint32_t)((0xF << 16) | (0x7 << 12) | (1 << 26) | 0xFF);
// Split the 16-bit immediate into A1 MOVT fields
uint32_t imm4 = (imm16 >> 12) & 0xF;
uint32_t imm12 = imm16 & 0xFFF;
// Clear the immediate fields: imm4 (bits 19:16) and imm12 (bits 11:0)
instr &= ~(uint32_t)((0xF << 16) | 0xFFF);
// Set new immediate fields
instr |= (imm4 << 16);
instr |= (imm3 << 12);
instr |= (i << 26);
instr |= (imm8);
instr |= imm12;
*((uint32_t *)patch_addr) = instr;
}
@ -188,8 +182,8 @@ int parse_commands(uint8_t *bytes) {
patch_mask = *(uint32_t*)bytes; bytes += 4;
patch_scale = *(int32_t*)bytes; bytes += 4;
value = *(int32_t*)bytes; bytes += 4;
LOG("PATCH_OBJECT_MOVW_ABS patch_offs=%i value=%i\n",
offs, value);
LOG("PATCH_OBJECT_ARM32_ABS patch_offs=%i patch_mask=%#08x scale=%i value=%i imm16=%#04x\n",
offs, patch_mask, patch_scale, value, (uint32_t)((uintptr_t)(data_memory + value) & patch_mask) / (uint32_t)patch_scale);
patch_arm32_abs(executable_memory + offs, (uint32_t)((uintptr_t)(data_memory + value) & patch_mask) / (uint32_t)patch_scale);
break;